Statement of Changes in Beneficial Ownership (4)

FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^* Insight Holdings Group, LLC	2. Issuer Name and Ticker or Trading Symbol Tenable Holdings, Inc. [ TENB ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below)
(Last) (First) (Middle) C/O INSIGHT PARTNERS, 1114 AVENUE OF THE AMERICAS, 36TH FLOOR	3. Date of Earliest Transaction (MM/DD/YYYY) 5/20/2020
(Street) NEW YORK, NY 10036 (City) (State) (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) ___ Form filed by One Reporting Person _ X _ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	5/20/2020		S		39437	D	$29.75 ⁽⁶⁾	8083489	I	See Footnote ⁽¹⁾
Common Stock	5/20/2020		S		19595	D	$29.75 ⁽⁶⁾	4016489	I	See Footnote ⁽²⁾
Common Stock	5/20/2020		S		4178	D	$29.75 ⁽⁶⁾	856444	I	See Footnote ⁽³⁾
Common Stock	5/20/2020		S		787	D	$29.75 ⁽⁶⁾	161354	I	See Footnote ⁽⁴⁾
Common Stock	5/21/2020		S		21564	D	$29.09 ⁽⁷⁾	8061925	I	See Footnote ⁽¹⁾
Common Stock	5/21/2020		S		10714	D	$29.09 ⁽⁷⁾	4005775	I	See Footnote ⁽²⁾
Common Stock	5/21/2020		S		2285	D	$29.09 ⁽⁷⁾	854159	I	See Footnote ⁽³⁾
Common Stock	5/21/2020		S		430	D	$29.09 ⁽⁷⁾	160924	I	See Footnote ⁽⁴⁾
Common Stock	5/22/2020		S		390398	D	$29.19 ⁽⁸⁾	7671527	I	See Footnote ⁽¹⁾
Common Stock	5/22/2020		S		193980	D	$29.19 ⁽⁸⁾	3811795	I	See Footnote ⁽²⁾
Common Stock	5/22/2020		S		41363	D	$29.19 ⁽⁸⁾	812796	I	See Footnote ⁽³⁾
Common Stock	5/22/2020		S		7793	D	$29.19 ⁽⁸⁾	153131	I	See Footnote ⁽⁴⁾
Common Stock								25699	I	See Footnote ⁽⁵⁾

*Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)*
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)			11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:
(1)	See Exhibit 99.1
(2)	See Exhibit 99.1
(3)	See Exhibit 99.1
(4)	See Exhibit 99.1
(5)	See Exhibit 99.1
(6)	See Exhibit 99.1
(7)	See Exhibit 99.1.
(8)	See Exhibit 99.1.

Remarks:
This Form 4 is the first of two Forms 4 filed relating to the same event. The Form 4 has been split into two filings because there are more than 10 reporting persons in total, and the SEC's EDGAR filing system limits a single Form 4 to a maximum of 10 reporting person. Each Form 4 is filed by Designated Filer, Insight Holdings Group, LLC.

Exhibit List
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Exhibit 99.1 - Explanation of Responses
Exhibit 99.2 - Joint Filers' Signatures
Exhibit 99.3 - Joint Filer Information

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Insight Holdings Group, LLC C/O INSIGHT PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK, NY 10036		X
Insight Venture Associates IX, Ltd. C/O INSIGHT PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK, NY 10036		X
Insight Venture Associates IX, L.P. C/O INSIGHT PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK, NY 10036		X
Insight Venture Partners IX, L.P. C/O INSIGHT PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK, NY 10036		X
Insight Venture Partners (Cayman) IX, L.P. C/O INSIGHT PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK, NY 10036		X
Insight Venture Partners (Delaware) IX, L.P. C/O INSIGHT PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK, NY 10036		X
Insight Venture Partners IX (Co-Investors), L.P. C/O INSIGHT PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK, NY 10036		X
IVP (Venice), L.P. C/O INSIGHT PARTNERS 1114 AVENUE OF THE AMERICAS, 36TH FLOOR NEW YORK, NY 10036		X

Signatures
Insight Holdings Group, LLC, by Blair Flicker, its Authorized Signatory, /s/ Blair Flicker		5/22/2020
^**Signature of Reporting Person		Date