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	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response... 0.5
	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 VENTURE PARTNERS, 1114 AVENUE OF THE AMERICAS, 36TH FLOOR	3. Date of Earliest Transaction (MM/DD/YYYY) 7/30/2018
(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	7/30/2018		C		4107504	A	⁽¹⁾	4107504	I	See footnote ⁽²⁾
Common Stock	7/30/2018		C		3302193	A	⁽¹⁾	3302193	I	See footnote ⁽³⁾
Common Stock	7/30/2018		C		3036378	A	⁽¹⁾	3036378	I	See footnote ⁽⁴⁾
Common Stock	7/30/2018		C		3737080	A	⁽¹⁾	3737080	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)
Series B Preferred Stock	⁽¹⁾	7/30/2018		C			4107504	⁽¹⁾	⁽¹⁾	Common Stock	4107504	$0	0	I	See footnote ⁽²⁾
Series B Preferred Stock	⁽¹⁾	7/30/2018		C			3302193	⁽¹⁾	⁽¹⁾	Common Stock	3302193	$0	0	I	See footnote ⁽³⁾
Series B Preferred Stock	⁽¹⁾	7/30/2018		C			3036378	⁽¹⁾	⁽¹⁾	Common Stock	3036378	$0	0	I	See footnote ⁽⁴⁾
Series B Preferred Stock	⁽¹⁾	7/30/2018		C			3737080	⁽¹⁾	⁽¹⁾	Common Stock	3737080	$0	0	I	See footnote ⁽⁵⁾

Explanation of Responses:
(1)	Each share of the issuer's Series B preferred stock converted into 1 share of the issuer's common stock and had no expiration date.
(2)	Held directly by Insight Venture Partners Growth-Buyout Coinvestment Fund, L.P.
(3)	Held directly by Insight Venture Partners Growth-Buyout Coinvestment Fund (Cayman), L.P.
(4)	Held directly by Insight Venture Partners Growth-Buyout Coinvestment Fund (Delaware), L.P.
(5)	Held directly by Insight Venture Partners Growth-Buyout Coinvestment Fund (B), L.P.

Remarks:
This Form 4 is the second 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.

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

Signatures
Insight Holdings Group, LLC, by /s/ Blair Flicker, its Authorized Signatory		7/31/2018
^** Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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