TENB / Tenable Holdings, Inc. - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 19, 2025 TENABLE HOLDINGS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 19, 2025 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizati

EMPLOYMENT AGREEMENT

EMPLOYMENT AGREEMENT This EMPLOYMENT AGREEMENT (the “Agreement”) is entered into effective as of August 19, 2025 (the “Effective Date”), by and between Matthew Brown (“Executive”) and Tenable, Inc.

Tenable Names Matthew Brown as Chief Financial Officer

Tenable Names Matthew Brown as Chief Financial Officer COLUMBIA, Md. – August 21, 2025 – Tenable® (NASDAQ: TENB), the exposure management company, today announced the appointment of Matthew Brown as Chief Financial Officer, effective immediately. Brown succeeds Steve Vintz, who recently was appointed as a Co-Chief Executive Officer of the Company alongside Mark Thurmond. Brown is an accomplished p

Amendment No. 1 to Employment Agreement, dated August 5, 2025, by and between Tenable, Inc. and Mark Thurmond

AMENDMENT NO. 1 TO EMPLOYMENT AGREEMENT THIS AMENDMENT (“Amendment”) to the Employment Agreement dated January 1, 2020 between Tenable, Inc. (“Tenable” or “Company”) and Mark Thurmond (“Executive”) (the “Agreement”) is made and entered into as of August 5, 2025. WHEREAS, Tenable desires to continue to employee Executive to perform such services as described below, in accordance with the terms here

Non-Employee Director Compensation Policy

TENABLE HOLDINGS, INC. NON-EMPLOYEE DIRECTOR COMPENSATION POLICY (Adopted May 13, 2025) (the “Effective Date”) Each member of the Board of Directors (the “Board”) who is not also serving as an employee of or consultant to Tenable Holdings, Inc. (the “Company”) or any of its subsidiaries (each such member, an “Eligible Director”) will receive the compensation described in this Non-Employee Director

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended June 30, 2025 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS, INC.

to Amended and Restated Employment Agreement, dated August 5, 2025, by and between Tenable, Inc. and Stephen A. Vintz

AMENDMENT NO. 1 TO EMPLOYMENT AGREEMENT THIS AMENDMENT (“Amendment”) to the Amended and Restated Employment Agreement dated February 20, 2019 between Tenable, Inc. (“Tenable” or “Company”) and Stephen A. Vintz (“Executive”) (the “Agreement”) is made and entered into as of August 5, 2025. WHEREAS, Tenable desires to continue to employee Executive to perform such services as described below, in acco

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 30, 2025 TENABLE HOLDINGS, I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 30, 2025 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organization

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended June 30, Six Months Ended June 30, (in thousands, except per share data) 2025 2024 2025 2024 Revenue $ 247,295 $ 221,241 $ 486,432 $ 437,202 Cost of revenue(1) 54,434 48,

Tenable Announces Second Quarter 2025 Financial Results •Revenue of $247.3 million, up 12% year-over-year. •Calculated current billings of $238.6 million, up 8% year-over-year. •GAAP operating margin of (3)%; Non-GAAP operating margin of 19%. •Net cash provided by operating activities of $42.5 million; Unlevered free cash flow of $44.3 million. •Announced a $250 million expansion of our existing s

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 14, 2025 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organization)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended March 31, 2025 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS, INC

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended March 31, (in thousands, except per share data) 2025 2024 Revenue $ 239,137 $ 215,961 Cost of revenue(1) 52,460 48,932 Gross profit 186,677 167,029 Operating expenses: Sa

Tenable Announces First Quarter 2025 Financial Results •Revenue of $239.1 million, up 11% year-over-year. •Calculated current billings of $215.4 million, up 9% year-over-year. •GAAP operating margin of (7)%; Non-GAAP operating margin of 20%. •Net cash provided by operating activities of $87.4 million; Unlevered free cash flow of $86.8 million. COLUMBIA, Maryland, April 29, 2025 — Tenable Holdings,

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 29, 2025 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizatio

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 16, 2025 TENABLE HOLDINGS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 16, 2025 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizatio

Tenable Appoints Steve Vintz and Mark Thurmond as Co-CEOs

Tenable Appoints Steve Vintz and Mark Thurmond as Co-CEOs COLUMBIA, Md. (April 16, 2025) — Tenable®, the exposure management company, today announced that its Board of Directors has unanimously appointed Steve Vintz and Mark Thurmond as co-Chief Executive Officers on a permanent basis. Following an extensive search process that considered both internal and external candidates, the Board concluded

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.) Filed by the Registrant ý Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Defini

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ý Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ý Definitive Proxy Statement ¨ Definitive Additional Materials ¨ Soliciting Material Pursuant to § 240.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ý Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Proxy State

As filed with the U.S. Securities and Exchange Commission on February 21, 2025 Registration No. 333-

As filed with the U.S. Securities and Exchange Commission on February 21, 2025 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 47-5580846 (State or other jurisdiction of incorporation or organization) (

Subsidiaries of Tenable Holdings, Inc.

Exhibit 21.1 SUBSIDIARIES OF TENABLE HOLDINGS, INC. Name of Subsidiary Jurisdiction of Incorporation Tenable, Inc. Delaware Accurics, Inc. Delaware Ermetic Ltd. Israel Eureka Security Ltd. Israel Tenable Israel Ltd. Israel Indegy Ltd. Israel Bit Discovery, Inc. Delaware Tenable Network Security Ireland Limited Ireland Alsid, SAS France Tenable Network Security Pte. Limited Singapore Tenable Public

Filing Fee Table

Exhibit 107 CALCULATION OF FILING FEE TABLE FORM S-8 (Form Type) TENABLE HOLDINGS, INC.

Tenable Holdings, Inc. Insider Trading Policy

TENABLE HOLDINGS, INC. INSIDER TRADING POLICY INTRODUCTION During the course of your relationship with Tenable Holdings, Inc. (“Tenable”), you may receive important information that is not yet publicly available (“inside information”) about Tenable or other publicly traded companies that Tenable has business relationships with. Inside information may give you or someone you pass that information o

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2024 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS, INC. (Ex

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 19, 2025 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organiza

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 7, 2025 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizat

Tenable Completes Acquisition of Vulcan Cyber Expanded Tenable One Exposure Management Platform capabilities will unify security visibility, insight and action across the attack surface

Tenable Completes Acquisition of Vulcan Cyber Expanded Tenable One Exposure Management Platform capabilities will unify security visibility, insight and action across the attack surface COLUMBIA, Md.

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS

Tenable Announces Fourth Quarter and Full Year 2024 Financial Results •Fourth quarter revenue of $235.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 5, 2025 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizat

Share Purchase Agreement, dated as of January 29, 2025, by and among Ermetic Ltd., Vulcan Cyber Ltd., the shareholders of Vulcan Cyber identified on the signature pages thereto, Shareholder Representative Services LLC and Tenable, Inc.

CONFIDENTIAL EXECUTION VERSION SHARE PURCHASE AGREEMENT by and among: ERMETIC LTD.

Tenable Plans to Acquire Vulcan Cyber, Accelerate Leadership in Exposure Management

Tenable Plans to Acquire Vulcan Cyber, Accelerate Leadership in Exposure Management COLUMBIA, Md.

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): January 29, 2025 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizat

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): January 3, 2025 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizati

TENABLE ANNOUNCES THE PASSING OF CHAIRMAN AND CEO AMIT YORAN

TENABLE ANNOUNCES THE PASSING OF CHAIRMAN AND CEO AMIT YORAN COLUMBIA, Md. (January 4, 2025) — It is with profound sadness that Tenable Holdings, Inc. announces the passing of our Chairman and Chief Executive Officer, Amit Yoran. Amit passed away unexpectedly yesterday. He had been battling cancer. A visionary leader and a pioneer in the cybersecurity industry, Amit dedicated his life to making th

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): December 2, 2024 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizat

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended September 30, 2024 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS,

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 30, 2024 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizat

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended September 30, Nine Months Ended September 30, (in thousands, except per share data) 2024 2023 2024 2023 Revenue $ 227,088 $ 201,529 $ 664,290 $ 585,404 Cost of revenue(1)

Tenable Announces Third Quarter 2024 Financial Results •Revenue of $227.1 million, up 13% year-over-year. •Calculated current billings of $248.4 million, up 11% year-over-year. •GAAP operating margin of (1)%; Non-GAAP operating margin of 20%. •Net cash provided by operating activities of $54.6 million; Unlevered free cash flow of $60.8 million. •$200 million expansion of our stock repurchase progr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended June 30, 2024 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS, INC.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 31, 2024 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organization

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended June 30, Six Months Ended June 30, (in thousands, except per share data) 2024 2023 2024 2023 Revenue $ 221,241 $ 195,036 $ 437,202 $ 383,875 Cost of revenue(1) 48,798 43,

Tenable Announces Second Quarter 2024 Financial Results •Revenue of $221.2 million, up 13% year-over-year. •Calculated current billings of $221.1 million, up 10% year-over-year. •GAAP operating margin of (4)%; Non-GAAP operating margin of 19%. •Net cash provided by operating activities of $31.4 million; Unlevered free cash flow of $36.5 million. COLUMBIA, Maryland, July 31, 2024 — Tenable Holdings

Non-Employee Director Compensation Policy

TENABLE HOLDINGS, INC. NON-EMPLOYEE DIRECTOR COMPENSATION POLICY (Adopted May 22, 2024) (the “Effective Date”) Each member of the Board of Directors (the “Board”) who is not also serving as an employee of or consultant to Tenable Holdings, Inc. (the “Company”) or any of its subsidiaries (each such member, an “Eligible Director”) will receive the compensation described in this Non-Employee Director

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 22, 2024 TENABLE HOLDINGS, IN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 22, 2024 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organization)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended March 31, 2024 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS, INC

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 1, 2024 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organization)

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended March 31, (in thousands, except per share data) 2024 2023 Revenue $ 215,961 $ 188,839 Cost of revenue(1) 48,932 45,506 Gross profit 167,029 143,333 Operating expenses: Sa

Tenable Announces First Quarter 2024 Financial Results •Revenue of $216.0 million, up 14% year-over-year. •Calculated current billings of $197.8 million, up 12% year-over-year. •GAAP operating margin of (4)%; Non-GAAP operating margin of 17%. •Net cash provided by operating activities of $50.3 million; Unlevered free cash flow of $54.7 million. COLUMBIA, Maryland, May 1, 2024 — Tenable Holdings, I

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ý Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ý Definitive Proxy Statement ¨ Definitive Additional Materials ¨ Soliciting Material Pursuant to § 240.

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ý Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Proxy Statement ý Definitive Additional Materials ¨ Soliciting Material Pursuant to § 240.

Incentive Compensation Recoupment Policy

Tenable Holdings, Inc. Incentive Compensation Recoupment Policy 1. Introduction The Compensation Committee of the Board of Directors (the “Board”) of Tenable Holdings, Inc., a Delaware corporation (the “Company”), has determined that it is in the best interests of the Company and its stockholders to adopt this Incentive Compensation Recoupment Policy (this “Policy”) providing for the Company’s rec

As filed with the U.S. Securities and Exchange Commission on February 28, 2024 Registration No. 333-

As filed with the U.S. Securities and Exchange Commission on February 28, 2024 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 47-5580846 (State or other jurisdiction of incorporation or organization) (

Filing Fee Table

Exhibit 107 CALCULATION OF FILING FEE TABLE FORM S-8 (Form Type) TENABLE HOLDINGS, INC.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2023 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS, INC. (Ex

Subsidiaries of Tenable Holdings, Inc.

Exhibit 21.1 SUBSIDIARIES OF TENABLE HOLDINGS, INC. Name of Subsidiary Jurisdiction of Incorporation Tenable, Inc. Delaware Accurics, Inc. Delaware Ermetic, Ltd. Israel Tenable Network Security Ireland Limited Ireland Alsid, SAS France Tenable Public Sector LLC Delaware

TENB / Tenable Holdings, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv02053-tenableholdingsinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 3)* Name of issuer: Tenable Holdings Inc Title of Class of Securities: Common Stock CUSIP Number: 88025T102 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to desi

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS

Tenable Announces Fourth Quarter and Full Year 2023 Financial Results •Added 597 new enterprise platform customers and 156 net new six-figure customers in the fourth quarter(1).

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 6, 2024 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizat

Tenable Announces Share Repurchase Program

Tenable Announces Share Repurchase Program COLUMBIA, Md. (November 27, 2023) — Tenable Holdings, Inc. ("Tenable") (Nasdaq: TENB), the Exposure Management company, today announced that its Board of Directors has approved the repurchase of up to an aggregate of $100 million of its Common Stock. “We believe that the repurchase program is a good investment of available funds generated from increased o

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 27, 2023 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organiza

Second Amended and Restated Bylaws of Tenable Holdings, Inc.

SECOND AMENDED AND RESTATED BYLAWS OF TENABLE HOLDINGS, INC. (A DELAWARE CORPORATION) Effective November 14, 2023 Table of Contents Page -i- ARTICLE I OFFICES ................................................................................................................ 1 Section 1. Registered Office ...................................................................................... 1 Section

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 14, 2023 TENABLE HOLDING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 14, 2023 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organiza

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended September 30, 2023 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS,

Form of Restricted Stock Unit Grant Notice and Agreement under the 2018 Equity Incentive Plan

Tenable Holdings, Inc. Restricted Stock Unit Grant Notice (2018 Equity Incentive Plan) Tenable Holdings, Inc. (the “Company”), pursuant to its 2018 Equity Incentive Plan (the “Plan”), hereby awards to Participant a Restricted Stock Unit Award for the number of shares of the Company’s Common Stock (“Restricted Stock Units”) set forth below (the “Award”). The Award is subject to all of the terms and

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended September 30, Nine Months Ended September 30, (in thousands, except per share data) 2023 2022 2023 2022 Revenue $ 201,529 $ 174,851 $ 585,404 $ 498,560 Cost of revenue(1)

Tenable Announces Third Quarter 2023 Financial Results •Added 386 new enterprise platform customers and 58 net new six-figure customers.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): November 1, 2023 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizat

Tenable Completes Acquisition of Ermetic Expanded cloud security offering features unified CNAPP with powerful CIEM capabilities

Tenable Completes Acquisition of Ermetic Expanded cloud security offering features unified CNAPP with powerful CIEM capabilities COLUMBIA, Md.

Regulation FD Disclosure, Financial Statements and Exhibits, Completion of Acquisition or Disposition of Assets

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 2, 2023 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizati

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 7, 2023 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organiza

Tenable Increases Focus on Cloud Security with Agreement to Acquire CNAPP Vendor Ermetic Acquisition expands Tenable’s capabilities to unify visibility, assessment and remediation across infrastructure and identities both in the cloud and on-premises

Tenable Increases Focus on Cloud Security with Agreement to Acquire CNAPP Vendor Ermetic Acquisition expands Tenable’s capabilities to unify visibility, assessment and remediation across infrastructure and identities both in the cloud and on-premises COLUMBIA, Md.

Share Purchase Agreement, dated as of September 7, 2023, by and among Tenable, Inc., Ermetic Ltd., the shareholders of Ermetic identified on the signature pages thereto and Shareholder Representative Services LLC.

Final Version SHARE PURCHASE AGREEMENT by and among: TENABLE, INC., as Purchaser; ERMETIC LTD., as the Company; THE SHAREHOLDERS OF THE COMPANY, as Sellers and THE SELLERS’ REPRESENTATIVE, as representative, agent and attorney-in-fact of the Indemnitors. Dated as of September 7, 2023 CONFIDENTIAL i TABLE OF CONTENTS Page 1. PURCHASE AND SALE ........................................................

Form of Restricted Stock Unit Grant Notice and Agreement under the 2018 Equity Incentive Plan

Tenable Holdings, Inc. Restricted Stock Unit Grant Notice (2018 Equity Incentive Plan) Tenable Holdings, Inc. (the “Company”), pursuant to its 2018 Equity Incentive Plan (the “Plan”), hereby awards to Participant a Restricted Stock Unit Award for the number of shares of the Company’s Common Stock (“Restricted Stock Units”) set forth below (the “Award”). The Award is subject to all of the terms and

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended June 30, 2023 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS, INC.

Amendment No. 1 to Credit Agreement, dated as of June 1, 2023, by and among Tenable, Inc., the lenders party thereto and JPMorgan Chase Bank, N.A., as administrative agent and collateral agent.

libortransitionamendment Execution Version AMENDMENT NO. 1 THIS AMENDMENT NO. 1 (this “Agreement”), dated as of June 1, 2023, is entered into among Tenable Holdings, Inc., a Delaware corporation (“Holdings”), Tenable, Inc., a Delaware corporation (the “Borrower”), each other Guarantor party hereto (together with Holdings and the Borrower, the “Loan Parties”) and JPMORGAN CHASE BANK, N.A., as admin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 25, 2023 TENABLE HOLDINGS, I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 25, 2023 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organization

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended June 30, Six Months Ended June 30, (in thousands, except per share data) 2023 2022 2023 2022 Revenue $ 195,036 $ 164,341 $ 383,875 $ 323,709 Cost of revenue(1) 43,514 36,

Tenable Announces Second Quarter 2023 Financial Results •Added 426 new enterprise platform customers and 63 net new six-figure customers.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 13, 2023 TENABLE HOLDINGS, I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 13, 2023 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organization

Tenable Appoints Margaret Keane, former Synchrony Chief Executive Officer, to Board of Directors

Tenable Appoints Margaret Keane, former Synchrony Chief Executive Officer, to Board of Directors COLUMBIA, Md.

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 24, 2023 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organization)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended March 31, 2023 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS, INC

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended March 31, (in thousands, except per share data) 2023 2022 Revenue $ 188,839 $ 159,368 Cost of revenue(1) 45,506 34,930 Gross profit 143,333 124,438 Operating expenses: Sa

Tenable Announces First Quarter 2023 Financial Results •Added 379 new enterprise platform customers and 24 net new six-figure customers.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 24, 2023 TENABLE HOLDINGS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 24, 2023 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizatio

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ý Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ý Definitive Proxy Statement ¨ Definitive Additional Materials ¨ Soliciting Material Pursuant to § 240.

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ý Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Proxy Statement ý Definitive Additional Materials ¨ Soliciting Material Pursuant to § 240.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2022 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS, INC. (Ex

Filing Fee Table

Exhibit 107 CALCULATION OF FILING FEE TABLE FORM S-8 (Form Type) TENABLE HOLDINGS, INC.

Subsidiaries of Tenable Holdings, Inc.

Exhibit 21.1 SUBSIDIARIES OF TENABLE HOLDINGS, INC. Name of Subsidiary Jurisdiction of Incorporation Tenable, Inc. Delaware Accurics, Inc. Delaware Tenable Network Security Ireland Limited Ireland Alsid, SAS France Tenable Public Sector LLC Delaware

Employment Agreement, dated as of January 1, 2020, by and between Tenable, Inc. and Mark Thurmond

EMPLOYMENT AGREEMENT This Employment Agreement (the “Agreement”) is entered into effective as of January 1, 2020 (the “Effective Date”), by and between Mark Thurmond (“Executive”) and Tenable, Inc.

As filed with the U.S. Securities and Exchange Commission on February 24, 2023 Registration No. 333-

As filed with the U.S. Securities and Exchange Commission on February 24, 2023 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 47-5580846 (State or other jurisdiction of incorporation or organization) (

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS

Tenable Announces Fourth Quarter and Full Year 2022 Financial Results •Added 571 new enterprise platform customers and 140 net new six-figure enterprise platform customers in the fourth quarter.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 7, 2023 TENABLE HOLDINGS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 7, 2023 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizat

TENB / Tenable Holdings Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv0013-tenableholdingsinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 2)* Name of issuer: Tenable Holdings Inc. Title of Class of Securities: Common Stock CUSIP Number: 88025T102 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to desi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q/A (Amendment No. 1)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q/A (Amendment No. 1) ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended September 30, 2022 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-386

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended September 30, 2022 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS,

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended September 30, Nine Months Ended September 30, (in thousands, except per share data) 2022 2021 2022 2021 Revenue $ 174,851 $ 138,664 $ 498,560 $ 392,112 Cost of revenue(1)

Tenable Announces Third Quarter 2022 Financial Results ?Added 712 new enterprise platform customers and 89 net new six-figure customers.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 25, 2022 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizat

Tenable Appoints Cybersecurity Veteran Alex Tosheff to Board of Directors

Tenable Appoints Cybersecurity Veteran Alex Tosheff to Board of Directors COLUMBIA, Md.

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 28, 2022 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organiz

Cooley LLP 3175 Hanover Street Palo Alto, CA 94304-1130 t: (650) 843-5000 f: (650) 849-7400 cooley.com

CORRESP 1 filename1.htm Eric C. Jensen VIA EDGAR + 1 650 843 5049 [email protected] September 14, 2022 U.S. Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, DC 20549 Attn: Kathleen Collins, Accounting Branch Chief Joyce Sweeney, Senior Staff Accountant Re: Tenable Holdings, Inc. Form 10-K for the Year Ended December 31, 2021 Filed February 25, 2022

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 8, 2022 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organiza

August 30, 2022

CORRESP 1 filename1.htm August 30, 2022 United States Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549 Attn: Kathleen Collins, Accounting Branch Chief Joyce Sweeney, Senior Staff Accountant Re: Tenable Holdings, Inc. Form 10-K for the Year Ended December 31, 2021 Filed February 25, 2022 Form 8-K furnished April 26, 2022 File No. 001-38600

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 22, 2022 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizati

August 15, 2022

August 15, 2022 United States Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended June 30, 2022 or ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS, INC.

Cooley LLP 3175 Hanover Street Palo Alto, CA 94304-1130 t: (650) 843-5000 f: (650) 849-7400 cooley.com

Eric C. Jensen VIA EDGAR + 1 650 843 5049 [email protected] CERTAIN PORTIONS OF THIS LETTER HAVE BEEN OMITTED FROM THE VERSION FILED VIA EDGAR. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS. INFORMATION THAT WAS OMITTED IN THE EDGAR VERSION HAS BEEN NOTED IN THIS LETTER WITH A PLACEHOLDER IDENTIFIED BY THE MARK ?[***]?. July 28, 2022 U.S. Securities and Exchange C

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 26, 2022 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organization

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended June 30, Six Months Ended June 30, (in thousands, except per share data) 2022 2021 2022 2021 Revenue $ 164,341 $ 130,259 $ 323,709 $ 253,448 Cost of revenue(1) 36,037 26,

Tenable Announces Second Quarter 2022 Financial Results ?Added 540 new enterprise platform customers and 79 net new six-figure customers.

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 25, 2022 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organization)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended March 31, 2022 or ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS, INC

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended March 31, (in thousands, except per share data) 2022 2021 Revenue $ 159,368 $ 123,189 Cost of revenue(1) 34,930 22,073 Gross profit 124,438 101,116 Operating expenses: Sa

Tenable Announces First Quarter 2022 Financial Results ?Added 459 new enterprise platform customers and 17 net new six-figure customers.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 26, 2022 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizatio

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Proxy Statement ? Definitive Additional Materials ? Soliciting Material Pursuant to ? 240.

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Proxy Statement ? Definitive Additional Materials ? Soliciting Material Pursuant to ? 240.

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 23, 2022 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organiza

Form of Performance Restricted Stock Unit Grant Notice and Agreement

Tenable Holdings, Inc. Performance Restricted Stock Unit Grant Notice (2018 Equity Incentive Plan) Tenable Holdings, Inc. (the ?Company?), pursuant to its 2018 Equity Incentive Plan (the ?Plan?), hereby awards to Participant a Performance Restricted Stock Unit Award for the number of shares of the Company?s Common Stock (?Restricted Stock Units? or ?RSUs?) set forth below (the ?Award?). The Award

As filed with the U.S. Securities and Exchange Commission on February 25, 2022 Registration No. 333-

As filed with the U.S. Securities and Exchange Commission on February 25, 2022 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 47-5580846 (State or other jurisdiction of incorporation or organization) (

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ? Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2021 or ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS, INC. (Ex

Subsidiaries of Tenable Holdings, Inc.

Exhibit 21.1 SUBSIDIARIES OF TENABLE HOLDINGS, INC. Name of Subsidiary Jurisdiction of Incorporation Tenable, Inc. Delaware Accurics, Inc. Delaware Tenable Network Security Ireland Limited Ireland Alsid, SAS France Tenable Israel Ltd. Israel Tenable Public Sector LLC Delaware

Filing Fee Table

EX-FILING FEES 2 ex107.htm EX-FILING FEES Exhibit 107 CALCULATION OF FILING FEE TABLE FORM S-8 (Form Type) TENABLE HOLDINGS, INC. (Exact Name of Registrant as Specified in its Charter) Title of Securities to be Registered Amount to be Registered(1) Proposed Maximum Offering Price per Share Proposed Maximum Aggregate Offering Price Amount of Registration Fee Common Stock, par value $0.01 per share

EXHIBIT 99.1

EXHIBIT 99.1 The identity and the Item 3 classification of the relevant subsidiary are: Select Equity Group, L.P., which is an Investment Adviser in accordance with Rule 13d-1(b)(1)(ii)(E).

TENB / Tenable Holdings Inc / Select Equity Group, L.P. - SCHEDULE 13G/A, #1 Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Tenable Holdings, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 88025T102 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of This Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is fi

TENB / Tenable Holdings Inc / Insight Venture Partners Ix, L.p. - SCHEDULE 13G/A, AMENDMENT #3 Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2 (Amendment No. 3 – Exit Filing)* TENABLE HOLDINGS, INC. (Name of Issuer) COMMON STOCK, $0.01 PAR VALUE PER SHARE (Title of Class of Securities) 88025T102 (CUSIP Number) Decem

JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)

Exhibit 99.1 JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k) The undersigned acknowledge and agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13G shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing statements. The undersigned ackn

TENB / Tenable Holdings Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 1)* Name of issuer: Tenable Holdings Inc. Title of Class of Securities: Common Stock CUSIP Number: 88025T102 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 1, 2022 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizat

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS

Tenable Announces Fourth Quarter and Full Year 2021 Financial Results ?Added 562 new enterprise platform customers and 100 net new six-figure enterprise platform customers in the fourth quarter.

Ray Vicks Joins Tenable Board of Directors

Ray Vicks Joins Tenable Board of Directors COLUMBIA, Md. (January 7, 2022) ? Tenable?, the Cyber Exposure company, today announced that it has appointed Ray Vicks as an independent director to its board of directors, effective January 7, 2022. ?Ray has dedicated more than 40 years to providing senior management and the boards of directors of both public and private companies, non-profit organizati

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): January 7, 2022 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizati

Tenable Investor Day December 15, 2021 Topics and Speakers Business Update by Amit Yoran, Chief Executive Officer Product Review by Nico Popp, Chief Product Officer Go-To-Market overview by Mark Thurmond, Chief Operating Officer and Dave Feringa, Sen

Tenable Investor Day December 15, 2021 Topics and Speakers Business Update by Amit Yoran, Chief Executive Officer Product Review by Nico Popp, Chief Product Officer Go-To-Market overview by Mark Thurmond, Chief Operating Officer and Dave Feringa, Senior Vice President Worldwide Sales Financial Overview and Outlook by Steve Vintz, Chief Financial Officer Investor Q&A 2 Forward-Looking Statements This presentation includes forward-looking statements.

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): December 15, 2021 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organiza

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended September 30, 2021 or ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS,

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended September 30, Nine Months Ended September 30, (in thousands, except per share data) 2021 2020 2021 2020 Revenue $ 138,664 $ 112,282 $ 392,112 $ 322,139 Cost of revenue(1)

Tenable Announces Third Quarter 2021 Financial Results ?Added 499 new enterprise platform customers and 62 net new six-figure customers ?Revenue of $138.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 26, 2021 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizat

Tenable Completes Acquisition of Accurics

Tenable Completes Acquisition of Accurics Columbia, MD (October 4, 2021) - Tenable Holdings, Inc.

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 1, 2021 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizati

Share Purchase Agreement, dated as of September 13, 2021, by and among Tenable, Inc., Accurics, Inc., the shareholders of Accurics identified in the Purchase Agreement or joined to the Purchase Agreement pursuant to a joinder agreement, and Shareholder Representative Services LLC, as the representative of Accurics' shareholders thereunder.

SHARE PURCHASE AGREEMENT by and among: TENABLE, INC., as Purchaser; ACCURICS, INC., as the Company; THE SHAREHOLDERS OF THE COMPANY as Sellers; and THE SELLERS? REPRESENTATIVE, as agent for Sellers. Dated as of September 13, 2021 TABLE OF CONTENTS Page 1 Purchase and Sale 1 1.1 Share Purchase 1 1.2 Treatment of Equity Awards 2 1.3 Treatment of Warrants 2 1.4 Consideration for Sale Shares 3 1.5 Esc

Tenable Announces Intent to Acquire Cloud-Native Security Company, Accurics Acquisition will deliver programmatic assessment and automated mitigation for infrastructure as code before they become risks to cloud deployments

Tenable Announces Intent to Acquire Cloud-Native Security Company, Accurics Acquisition will deliver programmatic assessment and automated mitigation for infrastructure as code before they become risks to cloud deployments Columbia, MD (September 13, 2021) - Tenable Holdings, Inc.

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 13, 2021 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organiz

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended June 30, 2021 or ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS, INC.

Credit Agreement, dated as of July 7, 2021, by and among Tenable, Inc., the lenders party thereto and JPMorgan Chase Bank, N.A., as administrative agent and collateral agent.

CREDIT AGREEMENT dated as of July 7, 2021 among TENABLE HOLDINGS, INC., as Holdings, TENABLE, INC., as Borrower, the Lenders and Issuing Banks from time to time party hereto, JPMORGAN CHASE BANK, N.A., as Administrative Agent and as Collateral Agent, and JPMORGAN CHASE BANK, N.A., MORGAN STANLEY SENIOR FUNDING, INC., BANK OF AMERICA, N.A., and BARCLAYS BANK PLC, as Lead Arrangers and Bookrunners A

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended June 30, Six Months Ended June 30, (in thousands, except per share data) 2021 2020 2021 2020 Revenue $ 130,259 $ 107,209 $ 253,448 $ 209,857 Cost of revenue(1) 26,425 19,

Tenable Announces Second Quarter 2021 Financial Results ?Added 399 new enterprise platform customers(1) and 67 net new six-figure customers ?Revenue of $130.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 27, 2021 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organization

Entry into a Material Definitive Agreement, Termination of a Material Definitive Agreement, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 7, 2021 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organization)

Tenable Announces Closing of New Senior Secured Credit Facility

Tenable Announces Closing of New Senior Secured Credit Facility Columbia, MD (July 7, 2021) - Tenable?, Inc.

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 25, 2021 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organization)

Niloofar Razi Howe Joins Tenable Board of Directors

Niloofar Razi Howe Joins Tenable Board of Directors COLUMBIA, Md. (May 27, 2021) ? Tenable?, the Cyber Exposure company, today announced that it has appointed Niloofar Razi Howe as an independent director to its board of directors, effective May 25, 2021. ?With her expertise in cybersecurity and a track record of leading corporate strategy and global expansion at high-growth companies, Niloo is a

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended March 31, 2021 or ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS, INC

Tenable Completes Acquisition of Alsid and Launches Tenable.ad to Secure Active Directory Environments

Tenable Completes Acquisition of Alsid and Launches Tenable.ad to Secure Active Directory Environments Columbia, MD (April 27, 2021) - Tenable Holdings, Inc. (?Tenable?) (Nasdaq: TENB), the Cyber Exposure company, today announced that it completed the acquisition of Alsid SAS (?Alsid?), a leader in securing Active Directory, on April 26, 2021. The acquisition combines the complementary strengths o

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 26, 2021 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizatio

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended March 31, (in thousands, except per share data) 2021 2020 Revenue $ 123,189 $ 102,648 Cost of revenue(1) 22,073 18,701 Gross profit 101,116 83,947 Operating expenses: Sal

Tenable Announces First Quarter 2021 Financial Results ?Added 331 new enterprise platform customers and 29 net new six-figure customers ?Revenue of $123.

- DEFA14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Proxy Statement ? Definitive Additional Materials ? Soliciting Material Pursuant to ? 240.

- DEF 14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Proxy Statement ? Definitive Additional Materials ? Soliciting Material Pursuant to ? 240.

- S-8

As filed with the U.S. Securities and Exchange Commission on February 22, 2021 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 47-5580846 (State or other jurisdiction of incorporation or organization) (

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ? Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2020 or ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS, INC. (Ex

Subsidiaries of Tenable Holdings, Inc.

Exhibit 21.1 SUBSIDIARIES OF TENABLE HOLDINGS, INC. Name of Subsidiary Jurisdiction of Incorporation Tenable, Inc. Delaware Tenable Network Security Ireland Limited Ireland Indegy Ltd. Israel Tenable Public Sector LLC Delaware

EXHIBIT 99.2

EXHIBIT 99.2 AGREEMENT OF REPORTING PERSONS The undersigned acknowledge and agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13G shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing agreements. The undersigned acknowledge that each

EXHIBIT 99.1

EXHIBIT 99.1 The identity and the Item 3 classification of the relevant subsidiary are: Select Equity Group, L.P., which is an Investment Adviser in accordance with Rule 13d-1(b)(1)(ii)(E).

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Tenable Holdings, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) (CUSIP Number) December 31, 2020 (D

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Tenable Holdings, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 88025T102 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of This Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is fil

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 Name of issuer: Tenable Holdings Inc. Title of Class of Securities: Common Stock CUSIP Number: 88025T102 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule 13d-1(b) ☐ R

Tenable Announces Intent to Acquire Alsid

Tenable Announces Intent to Acquire Alsid Columbia, MD (February 10, 2021) - Tenable Holdings, Inc.

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 10, 2021 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organiza

Share Purchase Agreement, dated as of February 10, 2021, by and among Tenable Network Security Ireland Limited, Alsid SAS, the shareholders and warrantholders of Alsid identified in the Purchase Agreement or joined to the Purchase Agreement pursuant to a joinder agreement, and Shareholder Representative Services LLC, as the representative of Alsid’s shareholders and warrantholders thereunder.

SHARE PURCHASE AGREEMENT by and among: Tenable Network Security Ireland Limited, as Purchaser; Alsid SAS, as the Company; the SHAREholders of the company, as Sellers; and SHAREHOLDER REPRESENTATIVE SERVICES LLC, as Sellers’ Representative.

JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)

Exhibit 99.1 JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k) The undersigned acknowledge and agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13G shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing statements. The undersigned ackn

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2 (Amendment No. 2)* TENAB

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2 (Amendment No. 2)* TENABLE HOLDINGS, INC. (Name of Issuer) COMMON STOCK, $0.01 PAR VALUE PER SHARE (Title of Class of Securities) 88025T102 (CUSIP Number) December 31, 2020 (

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS

EX-99.1 2 q420inancialresults-earnin.htm EX-99.1 Tenable Announces Fourth Quarter and Full Year 2020 Financial Results •Added 460 new enterprise platform customers and 66 net new six-figure enterprise platform customers in the fourth quarter. •Fourth quarter revenue of $118.1 million, up 22% year-over-year; Full year revenue of $440.2 million, up 24% year-over-year. •Fourth quarter GAAP loss from

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 2, 2021 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizat

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended September 30, 2020 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS,

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended September 30, Nine Months Ended September 30, (in thousands, except per share data) 2020 2019 2020 2019 Revenue $ 112,282 $ 91,852 $ 322,139 $ 257,537 Cost of revenue(1)

Tenable Announces Third Quarter 2020 Financial Results •Added 335 new enterprise platform customers and 56 net new six-figure customers •Revenue of $112.

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 27, 2020 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizat

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 30, 2020 TENABLE HOLDINGS, INC.

Underwriting Agreement, dated July 30, 2020, by and among Tenable Holdings, Inc., J.P. Morgan Securities LLC and Morgan Stanley & Co. LLC and the selling stockholders named therein.

Exhibit 1.1 8,000,000 Shares TENABLE HOLDINGS, INC. COMMON STOCK, PAR VALUE $0.01 PER SHARE UNDERWRITING AGREEMENT July 30, 2020 July 30, 2020 J.P. Morgan Securities LLC Morgan Stanley & Co. LLC As Representatives of the several Underwriters listed in Schedule II hereto c/o J.P. Morgan Securities LLC 383 Madison Avenue New York, New York 10179 c/o Morgan Stanley & Co. LLC 1585 Broadway New York, N

Per share

Filed pursuant to Rule 424(b)(7) Registration No. 333-240164 Prospectus supplement (To prospectus dated July 29, 2020) 8,000,000 shares Tenable Holdings, Inc. Common stock The selling stockholders identified in this prospectus supplement are offering an aggregate of 8,000,000 shares of our common stock pursuant to this prospectus supplement and the accompanying prospectus. We will not receive any

Second Amendment to Loan and Security Agreement, dated as of July 1, 2020, by and between Tenable, Inc. and Silicon Valley Bank

SECOND AMENDMENT TO LOAN AND SECURITY AGREEMENT This Second Amendment to Loan and Security Agreement (this “Amendment”) is entered into this 1st day of July, 2020, by and between Silicon Valley Bank (“Bank”), and Tenable, Inc.

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended June 30, 2020 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS, INC.

Per share

Filed pursuant to Rule 424(b)(7) Registration No. 333-240164 The information in this preliminary prospectus supplement and the accompanying prospectus is not complete and may be changed. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell these securities, and the selling stockholders are not soliciting offers to buy these securities in any jurisdiction

- S-3ASR

As filed with the Securities and Exchange Commission on July 29, 2020 Registration No.

Credit Agreement, dated as of July 24, 2020, by and among Tenable Holdings, Inc., as guarantor, Tenable, Inc., as borrower, the several lenders from time to time party thereto, and Silicon Valley Bank, as administrative agent, issuing lender and swingline lender, and as lead arranger

SENIOR SECURED CREDIT FACILITIES CREDIT AGREEMENT dated as of July 24, 2020, among TENABLE HOLDINGS, INC.

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 24, 2020 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organization

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended June 30, Six Months Ended June 30, (in thousands, except per share data) 2020 2019 2020 2019 Revenue $ 107,209 $ 85,384 $ 209,857 $ 165,685 Cost of revenue(1) 19,142 13,9

Tenable Announces Second Quarter 2020 Financial Results • Added 341 new enterprise platform customers and 50 net new six-figure customers • Revenue of $107.

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): June 3, 2020 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organization)

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended March 31, 2020 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE HOLDINGS, INC

First Amendment to Loan and Security Agreement, dated as of April 22, 2020, by and between Tenable, Inc. and Silicon Valley Bank

FIRST AMENDMENT TO LOAN AND SECURITY AGREEMENT This First Amendment to Loan and Security Agreement (this “Amendment”) is entered into this 22nd day of April, 2020, by and between Silicon Valley Bank (“Bank”), and Tenable, Inc.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 28, 2020 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizatio

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended March 31, (in thousands, except per share data) 2020 2019 Revenue $ 102,648 $ 80,301 Cost of revenue(1) 18,701 13,226 Gross profit 83,947 67,075 Operating expenses: Sales

Tenable Announces First Quarter 2020 Financial Results • Added 319 new enterprise platform customers and 24 net new six-figure customers • Revenue of $102.

TENB / Tenable Holdings, Inc. DEFA14A - - DEFA14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ý Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Proxy Statement ý Definitive Additional Materials ¨ Soliciting Material Pursuant to § 240.

Schedule 14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ý Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ý Definitive Proxy Statement ¨ Definitive Additional Materials ¨ Soliciting Material Pursuant to § 240.

Description of Common Stock of Tenable Holdings, Inc.

Exhibit 4.3 DESCRIPTION OF TENABLE HOLDINGS, INC. COMMON STOCK The following descriptions of the common stock of Tenable Holdings, Inc., or the Company, Delaware law and certain provisions of the Company’s amended and restated certificate of incorporation and amended and restated bylaws are summaries. These summaries are qualified in the entirety by reference to the provisions of the Delaware Gene

Subsidiaries of Tenable Holdings, Inc.

Exhibit 21.1 SUBSIDIARIES OF TENABLE HOLDINGS, INC. Name of Subsidiary Jurisdiction of Incorporation Tenable, Inc. Delaware Tenable Network Security Ireland Limited Ireland Indegy Ltd. Israel

TENB / Tenable Holdings, Inc. 10-K - Annual Report - 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2019 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE

As filed with the U.S. Securities and Exchange Commission on February 28, 2020 Registration No. 333-

As filed with the U.S. Securities and Exchange Commission on February 28, 2020 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 47-5580846 (State or other jurisdiction of incorporation or organization) (

TENB / Tenable Holdings, Inc. / Insight Venture Partners Ix, L.p. - SCHEDULE 13G/A, #1 Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2 (Amendment No. 1)* TENABLE HOLDINGS, INC. (Name of Issuer) COMMON STOCK, $0.01 PAR VALUE PER SHARE (Title of Class of Securities) 88025T102 (CUSIP Number) December 31, 2019 (

JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)

Exhibit 99.1 JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k) The undersigned acknowledge and agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13G shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing statements. The undersigned ackn

TENB / Tenable Holdings, Inc. / Accel Xi L.p. - SC 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1 (b), (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 (b) (Amendment No. 1)* Tenable Holdings, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 88025T102 (CUSIP Number) December 31, 2019 (Date of Eve

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS

Tenable Announces Fourth Quarter and Full Year 2019 Financial Results • Fourth quarter revenue of $97.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 4, 2020 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizat

Share Purchase Agreement, dated as of December 2, 2019, by and between Tenable, Inc., Indegy Ltd., the shareholders of Indegy set forth on Schedule I to the Purchase Agreement and Shareholder Representative Services LLC, as the representative of Indegy’s shareholders and optionholders thereunder.

EX-10.1 2 ex101.htm EXHIBIT 10.1 SHARE PURCHASE AGREEMENT by and among TENABLE, INC., INDEGY LTD., THE SELLING SHAREHOLDERS NAMED HEREIN and SHAREHOLDER REPRESENTATIVE SERVICES LLC, AS THE SHAREHOLDERS REPRESENTATIVE Dated December 2, 2019 TABLE OF CONTENTS Page 1. DESCRIPTION OF TRANSACTION ............................................................................................2 1.1 Purchase

Tenable Acquires Operational Technology Security Leader Indegy Cybersecurity market leaders create the industry's first unified, risk-based platform for IT and OT security

Tenable Acquires Operational Technology Security Leader Indegy Cybersecurity market leaders create the industry's first unified, risk-based platform for IT and OT security COLUMBIA, MD (December 2, 2019)- Tenable®, Inc.

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): December 2, 2019 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizat

TENB / Tenable Holdings, Inc. 10-Q - Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended September 30, 2019 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended September 30, Nine Months Ended September 30, (in thousands, except per share data) 2019 2018 2019 2018 Revenue $ 91,852 $ 69,440 $ 257,537 $ 192,139 Cost of revenue(1) 1

Tenable Announces Third Quarter 2019 Financial Results • Added 387 new enterprise platform customers and 51 net new six figure customers • Revenue of $91.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 29, 2019 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizat

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): August 8, 2019 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizatio

Form of Restricted Stock Unit Grant Notice and Agreement under the 2018 Equity Incentive Plan

EX-10.1 2 q22019exhibit101.htm EXHIBIT 10.1 TENABLE HOLDINGS, INC. RESTRICTED STOCK UNIT GRANT NOTICE (2018 EQUITY INCENTIVE PLAN) Tenable Holdings, Inc. (the “Company”), pursuant to its 2018 Equity Incentive Plan (the “Plan”), hereby awards to Participant a Restricted Stock Unit Award for the number of shares of the Company’s Common Stock (“Restricted Stock Units”) set forth below (the “Award”).

TENB / Tenable Holdings, Inc. 10-Q - Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended June 30, 2019 or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENA

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): July 30, 2019 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organization

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS Three Months Ended June 30, Six Months Ended June 30, (in thousands, except per share data) 2019 2018 2019 2018 Revenue $ 85,384 $ 63,592 $ 165,685 $ 122,699 Cost of revenue(1) 13,918 9,879

Tenable Announces Second Quarter 2019 Financial Results • Added 352 new enterprise platform customers and 44 net new six figure customers • Revenue of $85.

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): May 15, 2019 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organization)

TENB / Tenable Holdings, Inc. 10-Q Quarterly Report 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ý Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended March 31, 2019 or o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TEN

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): April 30, 2019 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizatio

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS

EX-99.1 2 q12019financialresults-ear.htm EXHIBIT 99.1 Tenable Announces First Quarter 2019 Financial Results • Revenue of $80.3 million, up 36% year-over-year • Calculated current billings of $81.2 million, up 25% year-over-year • Added 311 new enterprise platform customers and 41 net new six figure customers COLUMBIA, Maryland, April 30, 2019 — Tenable (Nasdaq: TENB), the Cyber Exposure company,

TENB / Tenable Holdings, Inc. DEFA14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ý Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Proxy Statement ý Definitive Additional Materials ¨ Soliciting Material Pursuant to § 240.

TENB / Tenable Holdings, Inc. DEF 14A

SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ý Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ý Definitive Proxy Statement ¨ Definitive Additional Materials ¨ Soliciting Material Pursuant to § 240.

TENB / Tenable Holdings, Inc. S-8

As filed with the U.S. Securities and Exchange Commission on March 1, 2019 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 47-5580846 (State or other jurisdiction of incorporation or organization) (I.R.

TENB / Tenable Holdings, Inc. 10-K (Annual Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ý Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2018 or o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENABLE

CYBER EXPOSURE MANAGING AND MEASURING CYBER RISK IN THE DIGITAL ERA FEBRUARY 2019 Forward-Looking Statements This presentation includes forward-looking statements. All statements contained in this presentation other than statements of historical fact

tenablepresentationfeb20 CYBER EXPOSURE MANAGING AND MEASURING CYBER RISK IN THE DIGITAL ERA FEBRUARY 2019 Forward-Looking Statements This presentation includes forward-looking statements.

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 26, 2019 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organiza

Amended and Restated Employment Agreement, dated as of February 20, 2019, by and between Tenable, Inc. and Stephen A. Vintz

AMENDED AND RESTATED EMPLOYMENT AGREEMENT This AMENDED AND RESTATED EMPLOYMENT AGREEMENT (the “Agreement”) is entered into effective as of February 20, 2019 (the “Effective Date”), by and between Stephen A.

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 20, 2019 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organiza

Amended and Restated Employment Agreement, dated as of February 20, 2019, by and between Tenable, Inc. and Amit Yoran

AMENDED AND RESTATED EMPLOYMENT AGREEMENT This AMENDED AND RESTATED EMPLOYMENT AGREEMENT (the “Agreement”) is entered into effective as of February 20, 2019 (the “Effective Date”), by and between Amit Y.

Amended and Restated Employment Agreement, dated as of February 20, 2019, by and between Tenable, Inc. and John G. Negron

AMENDED AND RESTATED EMPLOYMENT AGREEMENT This AMENDED AND RESTATED EMPLOYMENT AGREEMENT (the “Agreement”) is entered into effective as of February 20, 2019 (the “Effective Date”), by and between John G.

Amended and Restated Employment Agreement, dated as of February 20, 2019, by and between Tenable, Inc. and Stephen A. Riddick

AMENDED AND RESTATED EMPLOYMENT AGREEMENT This AMENDED AND RESTATED EMPLOYMENT AGREEMENT (the “Agreement”) is entered into effective as of February 20, 2019 (the “Effective Date”), by and between Stephen A.

TENB / Tenable Holdings, Inc. / Insight Venture Partners Ix, L.p. - SCHEDULE 13G Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2 (Amendment No. )* TENABLE HOLDINGS, INC. (Name of Issuer) COMMON STOCK, $0.01 PAR VALUE PER SHARE (Title of Class of Securities) 88025T102 (CUSIP Number) December 31, 2018 (D

JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)

Exhibit 99.1 JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k) The undersigned acknowledge and agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13G shall be filed on behalf of each of the undersigned without the necessity of filing additional joint filing statements. The undersigned ackn

TENB / Tenable Holdings, Inc. / Gula Ronald J. - ACQUISITION OF BENEFICIAL OWNERSHIP Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Tenable Holdings, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 88025T 10 2 (CUSIP Number) December 31, 2018 ** (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate box to designate the rule pur

TENB / Tenable Holdings, Inc. / Accel Xi L.p. - SC 13G Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1 (b), (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 (b) (Amendment No. )* Tenable Holdings, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 88025T102 (CUSIP Number) December 31, 2018 (Date of Even

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): February 5, 2019 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizat

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS

EX-99.1 2 q42018financialresults-ear.htm EXHIBIT 99.1 Tenable Announces Fourth Quarter and Full Year 2018 Financial Results • Fourth quarter revenue of $75.2 million, up 39% year-over-year. • Fourth quarter calculated current billings of $97.3 million, up 36% year-over-year. • Added 66 net new six-figure enterprise platform customers in fourth quarter, most in Tenable history. COLUMBIA, Maryland,

Material Modification to Rights of Security Holders, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): December 26, 2018 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organiza

TENB / Tenable Holdings, Inc. 10-Q (Quarterly Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ý Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended September 30, 2018 or o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

EX-99.1 2 q32018financialresults-ear.htm EXHIBIT 99.1 Tenable Announces Third Quarter 2018 Financial Results • Revenue of $69.4 million, up 42% year-over-year • Calculated current billings of $86.7 million, up 35% year-over-year • Added 47 net new six figure customers, up 79% year-over-year COLUMBIA, Maryland, October 30, 2018 — Tenable Holdings, Inc. (“Tenable”) (Nasdaq: TENB), the Cyber Exposure

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): October 30, 2018 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organizat

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 17, 2018 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organiz

Tenable Overview September 2018 Forward Looking Statements This presentation includes forward-looking statements. All statements contained in this presentation other than statements of historical facts, including statements regarding our future resul

tenableholdingsinccorpor Tenable Overview September 2018 Forward Looking Statements This presentation includes forward-looking statements.

TENB / Tenable Holdings, Inc. 10-Q (Quarterly Report)

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ý Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended June 30, 2018 or o Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38600 TENA

TENABLE HOLDINGS, INC. CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

EX-99.1 2 q22018financialresults-ear.htm EXHIBIT 99.1 Tenable Announces Second Quarter 2018 Financial Results • Revenue of $63.6 million, up 44% year-over-year • Calculated current billings of $77.4 million, up 39% year-over-year • Added 282 new logo enterprise platform customers, up 30% year-over-year • Raised $265 million of net proceeds in initial public offering in July COLUMBIA, Maryland, Sep

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of The Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 5, 2018 TENABLE HOLDINGS, INC. (Exact name of registrant as specified in its charter) Delaware 001-38600 47-5580846 (State or other jurisdiction of incorporation or organiza

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 30, 2018 Tenable Holdings, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-38600 47-5580846 (State or Other Jurisdiction of Incorporation) (Commissio

Amended and Restated Certificate of Incorporation of Tenable Holdings, Inc.

EX-3.1 2 d562353dex31.htm EX-3.1 Exhibit 3.1 TENABLE HOLDINGS, INC. AMENDED AND RESTATED CERTIFICATE OF INCORPORATION TENABLE HOLDINGS, INC., a corporation organized and existing under the laws of the State of Delaware (the “Company”), does hereby certify as follows: FIRST: The name of the Company is Tenable Holdings, Inc. SECOND: The Company was originally formed as Tenable Holdings, Inc., a comp

2012 Stock Incentive Plan and Form of Notice of Stock Option Grant and Form of Stock Option Agreement and Notice of Exercise and Common Stock Purchase Agreement thereunder, as amended to date

EX-10.2 4 d494510dex102.htm EX-10.2 Exhibit 10.2 AMENDED AND RESTATED TENABLE HOLDINGS, INC. 2012 STOCK INCENTIVE PLAN 1. PURPOSE The Amended and Restated Tenable Holdings, Inc. 2012 Stock Incentive Plan is intended to promote the best interests of Tenable Holdings, Inc. and its stockholders by (i) assisting the Corporation and its Affiliates in the recruitment and retention of persons with abilit

TENB / Tenable Holdings, Inc. S-8

S-8 As filed with the Securities and Exchange Commission on July 26, 2018 Registration No.

2016 Stock Incentive Plan and Irish Supplement and Forms of Option Grant Notice and Agreement and Exercise Notice and Form of Restricted Stock Grant Notice and Agreement thereunder, as amended to date

EX-10.1 3 d494510dex101.htm EX-10.1 Exhibit 10.1 TENABLE HOLDINGS, INC. 2016 STOCK INCENTIVE PLAN (Amended and Restated as of January 18, 2017) (Amended on February 23, 2017) (Amended on February 21, 2018) (Amended on June 15, 2018) 1. PURPOSE. The purpose of the Plan is to assist the Company in attracting, retaining, motivating, and rewarding certain key employees, officers, directors, and consul

2018 Employee Stock Purchase Plan

EX-10.5 Exhibit 10.5 TENABLE HOLDINGS, INC. 2018 EMPLOYEE STOCK PURCHASE PLAN ADOPTED BY THE BOARD OF DIRECTORS: JUNE 28, 2018 APPROVED BY THE STOCKHOLDERS: JULY 6, 2018 IPO DATE: JULY 25, 2018 1. GENERAL; PURPOSE. (a) The Plan provides a means by which Eligible Employees of the Company and certain Designated Companies may be given an opportunity to purchase shares of Common Stock. The Plan permit

2018 Equity Incentive Plan and Forms of Stock Option Grant Notice and Agreement and Restricted Stock Unit Grant Notice and Agreement thereunder

EX-10.4 6 d494510dex104.htm EX-10.4 Exhibit 10.4 TENABLE HOLDINGS, INC. 2018 EQUITY INCENTIVE PLAN ADOPTED BY THE BOARD OF DIRECTORS: JUNE 28, 2018 APPROVED BY THE STOCKHOLDERS: JULY 6, 2018 IPO DATE: JULY 25, 2018 1. GENERAL. (a) Successor to and Continuation of Prior Plan. The Plan is intended as the successor to and continuation of the Tenable Holdings, Inc. 2016 Stock Incentive Plan, as amende

2002 Stock Incentive Plan and Form of Notice of Option Grant and Form of Stock Option Agreement and Form of Notice of Stock Option Exercise and Form of Stock Award Agreement thereunder, as amended to date

EX-10.3 5 d494510dex103.htm EX-10.3 Exhibit 10.3 AMENDED AND RESTATED TENABLE HOLDINGS, INC. 2002 STOCK INCENTIVE PLAN 1. PURPOSE The Amended and Restated Tenable Holdings, Inc., 2002 Stock Incentive Plan is intended to promote the best interests of Tenable Holdings, Inc. and its stockholders by (i) assisting the Corporation and its Affiliates in the recruitment and retention of persons with abili

10,900,000 Shares COMMON STOCK

424B4 Table of Contents Filed Pursuant to Rule 424(b)(4) Registration No. 333-226002 PROSPECTUS 10,900,000 Shares COMMON STOCK Tenable Holdings, Inc. is offering 10,900,000 shares of its common stock. This is our initial public offering, and no public market currently exists for our shares of common stock. Our common stock has been approved for listing on the Nasdaq Global Select Market under the

TENB / Tenable Holdings, Inc. S-1/A

S-1/A Table of Contents As filed with the Securities and Exchange Commission on July 24, 2018 Registration Statement No.

TENB / Tenable Holdings, Inc. CORRESP

CORRESP July 23, 2018 VIA EDGAR Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.

TENB / Tenable Holdings, Inc. CORRESP

CORRESP TENABLE HOLDINGS, INC. 7021 Columbia Gateway Drive, Suite 500 Columbia, MD 21046 July 23, 2018 U.S. Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549 Attention: Barbara Jacobs, Assistant Director Christine Dietz, Assistant Chief Accountant Jeff Kauten, Attorney-Advisor Joyce Sweeney, Staff Accountant RE: Tenable Holdings, Inc. Regi

Form 8-A

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(B) OR (G) OF THE SECURITIES EXCHANGE ACT OF 1934 Tenable Holdings, Inc.

Form of Underwriting Agreement.

Exhibit 1.1 Shares TENABLE HOLDINGS, INC. COMMON STOCK, PAR VALUE $0.01 PER SHARE UNDERWRITING AGREEMENT , 2018 , 2018 Morgan Stanley & Co. LLC J.P. Morgan Securities LLC c/o Morgan Stanley & Co. LLC 1585 Broadway New York, New York 10036 c/o J.P. Morgan Securities LLC 383 Madison Avenue New York, New York 10179 Ladies and Gentlemen: Tenable Holdings, Inc., a Delaware corporation (the ?Company?),

Common Stock Certificate of Tenable Holdings, Inc.

EX-4.1 3 d548092dex41.htm EX-4.1 Exhibit 4.1 INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE SEE REVERSE SIDE FOR CERTAIN DEFINITIONS CUSIP 88025T 10 2 THIS CERTIFIES THAT is the owner of FULLY PAID AND NON-ASSESSABLE COMMON SHARES, $0.01 PAR VALUE, OF TENABLE HOLDINGS, INC. transferable on the books of the Corporation by the holder hereof in person or by Attorney upon surrender of this certi

As filed with the Securities and Exchange Commission on July 16, 2018

Table of Contents As filed with the Securities and Exchange Commission on July 16, 2018 Registration Statement No.

TENB / Tenable Holdings, Inc. CORRESP

CORRESP FOIA Confidential Treatment Request Confidential Treatment Requested by Tenable Holdings, Inc.