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
X	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* Longitude Capital Partners, LLC (Last) (First) (Middle) 2740 SAND HILL ROAD, 2ND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol COLLEGIUM PHARMACEUTICAL, INC [ COLL ]	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) 12/08/2017
	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
Common Stock	12/08/2017		S		980,350	D	$17.34	2,276,222	I	By LVP(1)
Common Stock	12/08/2017		S		19,650	D	$17.34	45,620	I	By LCA(1)

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

1. Name and Address of Reporting Person* Longitude Capital Partners, LLC (Last) (First) (Middle) 2740 SAND HILL ROAD, 2ND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)

1. Name and Address of Reporting Person* Tammenoms Bakker Juliet (Last) (First) (Middle) 2740 SAND HILL ROAD, 2ND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)

1. Name and Address of Reporting Person* ENRIGHT PATRICK G (Last) (First) (Middle) 2740 SAND HILL ROAD, 2ND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)

1. Name and Address of Reporting Person* Longitude Capital Associates, L.P. (Last) (First) (Middle) 2740 SAND HILL ROAD, 2ND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)

1. Name and Address of Reporting Person* Longitude Venture Partners L.P. (Last) (First) (Middle) 2740 SAND HILL ROAD, 2ND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)

Explanation of Responses:

1. This report is filed jointly by Longitude Capital Partners, LLC ("LCP"), Longitude Venture Partners, L.P. ("LVP"), Longitude Capital Associates, L.P. ("LCA"), Patrick G. Enright ("Enright") and Juliet Tammenoms Bakker ("Bakker"). LCP is the general partner of LVP and LCA, has the power to vote and dispose of the securities of the Issuer held by each of LVP and LCA, and may be deemed to have beneficial ownership of such securities. Each of Enright and Bakker is a managing member of LCP, has the power to vote and dispose of the securities of the Issuer held by each of LVP and LCA, and may be deemed to have beneficial ownership of such securities. Each of LCP, Enright and Bakker disclaims beneficial ownership of the securities of the Issuer held by LVP and LCA except to the extent of their respective pecuniary interest therein.

Remarks:

	/s/ Patrick Enright, managing member of Longitude Capital Partners, LLC	12/12/2017
	/s/ Juliet Tammenoms Bakker	12/12/2017
	/s/ Patrick Enright	12/12/2017
	/s/ Patrick Enright, managing member of Longitude Capital Partners, LLC, general partner of Longitude Capital Associates, L.P.	12/12/2017
	/s/ Patrick Enright, managing member of Longitude Capital Partners, LLC, general partner of Longitude Venture Partners, L.P.	12/12/2017
	** 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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