SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Argonaut 22 LLC (Last) (First) (Middle) ONE JOY STREET (Street) BOSTON MA 02108 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol CarGurus, Inc. [ CARG ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 10/16/2017
	4. If Amendment, Date of Original Filed (Month/Day/Year)	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. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction 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)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	10/16/2017		C		15,231,219	A	(1)	15,231,219	D(2)
Class A Common Stock	10/16/2017		S		1,523,000	D	$14.88	13,708,219	D(2)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction 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 (Month/Day/Year)		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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Series A Convertible Preferred Stock	(1)	10/16/2017		C			793,741	(1)	(1)	Class A Common Stock	4,762,448	$0	0	D(2)
Series B Convertible Preferred Stock	(1)	10/16/2017		C			791,643	(1)	(1)	Class A Common Stock	4,749,859	$0	0	D(2)
Series C Convertible Preferred Stock	(1)	10/16/2017		C			953,152	(1)	(1)	Class A Common Stock	5,718,912	$0	0	D(2)

1. Name and Address of Reporting Person* Argonaut 22 LLC (Last) (First) (Middle) ONE JOY STREET (Street) BOSTON MA 02108 (City) (State) (Zip)

1. Name and Address of Reporting Person* Spinnaker Capital LLC (Last) (First) (Middle) ONE JOY STREET (Street) BOSTON MA 02108 (City) (State) (Zip)

Explanation of Responses:

1. Each share of the Issuer's Series A Convertible Preferred Stock converted into 6.0000023 shares of the Issuer's Class A Common Stock upon the closing of the Issuer's sale of its Class A Common Stock in its firm commitment underwritten initial public offering pursuant to a registration statement on Form S-1 (File No. 333-220495) under the Securities Act of 1933, as amended (the "IPO"), and had no expiration date. Each share of the Issuer's Series B Convertible Preferred Stock converted into 6.0000015 shares of the Issuer's Class A Common Stock upon closing of the IPO and had no expiration date. Each share of the Issuer's Series C Convertible Preferred Stock converted into 6 shares of the Issuer's Class A Common Stock upon closing of the IPO and had no expiration date.

2. Argonaut 22 LLC is the direct beneficial owner of the shares. Spinnaker Capital LLC is the Managing Member of Argonaut 22 LLC and Anastasios Parafestas, a director of the Issuer, is the Managing Member of Spinnaker Capital LLC. Anastasios Parafestas and Spinnaker Capital are indirect beneficial owners of the reported securities.

	/s/ Anastasios Parafestas, Manager of Spinnaker Capital LLC, which is the Managing Member of Argonaut 22 LLC	10/18/2017
	/s/ Anastasios Parafestas, Manager of Spinnaker Capital LLC	10/18/2017
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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