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 *

HUFF CRAIG A	2. Issuer Name and Ticker or Trading Symbol

ASPEN AEROGELS INC [ ASPN ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__ X __ Director                      __ X __ 10% Owner
_____ Officer (give title below)      _____ Other (specify below)	
(Last)          (First)          (Middle)

C/O RESERVOIR CAPITAL GROUP, L.L.C., 767 FIFTH AVENUE, 16TH FLOOR	3. Date of Earliest Transaction (MM/DD/YYYY)

6/2/2015		
(Street)

NEW YORK, NY 10153
(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)	
			Code	V	Amount	(A) or (D)	Price				
Common Stock  	6/2/2015  	 	S	  	3428  	D	$7.0103   (1)	251028  	I  	Held by Reservoir Capital Master Fund, L.P.   (2)	
Common Stock  	6/2/2015  	 	S	  	17188  	D	$7.0103   (3)	2642250  	I  	Held by Reservoir Capital Partners, L.P.   (2)	
Common Stock  	6/3/2015  	 	S	  	558  	D	$6.7806   (4)	250470  	I  	Held by Reservoir Capital Master Fund, L.P.   (2)	
Common Stock  	6/3/2015  	 	S	  	2795  	D	$6.7806   (5)	2639455  	I  	Held by Reservoir Capital Partners, L.P.   (2)	
Common Stock  	 	 	 	  	 	 	 	7727  	D  	 	

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)	
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares					

Explanation of Responses:	
(  1) 	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.00 to $7.08, inclusive. The reporting person undertakes to provide to Aspen Aerogels, Inc., any security holder of Aspen Aerogels, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) and footnotes (3), (4) and (5) to this Form 4.	
(  2) 	The securities held by Reservoir Capital Partners, L.P. ("RCP") or Reservoir Capital Master Fund, L.P. ("RCMF") may be deemed to be beneficially owned by Craig A. Huff and Daniel Stern, who are the senior managing members (the "Reservoir Members") of RCGM, LLC ("RCGM"). RCGM is the managing member of Reservoir Capital Group, L.L.C. ("RCG"), which is the general partner of Reservoir Capital Partners (Cayman), L.P. ("RCP Cayman"), which is the sole member of RCP GP, LLC ("RCP GP"), and which is the general partner of RCP. RCG is the general partner of RCMF. Each of the Reservoir Members, RCGM, RCG, RCP Cayman and RCP GP disclaims beneficial ownership of the reported securities except to the extent of his or its pecuniary interest therein.	
(  3) 	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.00 to $7.08, inclusive.	
(  4) 	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.65 to $6.91, inclusive.	
(  5) 	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.65 to $6.91, inclusive.	

Reporting Owners	
Reporting Owner Name / Address	Relationships	
	Director	10% Owner	Officer	Other	
HUFF CRAIG A
C/O RESERVOIR CAPITAL GROUP, L.L.C.
767 FIFTH AVENUE, 16TH FLOOR
NEW YORK, NY 10153	X	X			
RESERVOIR CAPITAL PARTNERS LP
C/O RESERVOIR CAPITAL GROUP, L.L.C.
767 FIFTH AVENUE, 16TH FLOOR
NEW YORK, NY 10153		X			
RESERVOIR CAPITAL MASTER FUND LP
C/O RESERVOIR CAPITAL GROUP, L.L.C.
767 FIFTH AVENUE, 16TH FLOOR
NEW YORK, NY 10153		X			
STERN DANIEL H
C/O RESERVOIR CAPITAL GROUP, L.L.C.
767 FIFTH AVENUE, 16TH FLOOR
NEW YORK, NY 10153		X			
RCGM LLC
C/O RESERVOIR CAPITAL GROUP, L.L.C.
767 FIFTH AVENUE, 16TH FLOOR
NEW YORK, NY 10153		X			
RESERVOIR CAPITAL GROUP LLC
C/O RESERVOIR CAPITAL GROUP, L.L.C.
767 FIFTH AVENUE, 16TH FLOOR
NEW YORK, NY 10153		X			
RESERVOIR CAPITAL PARTNERS CAYMAN LP
C/O RESERVOIR CAPITAL GROUP, L.L.C.
767 FIFTH AVENUE, 16TH FLOOR
NEW YORK, NY 10153		X			
RCP GP, LLC
C/O RESERVOIR CAPITAL GROUP, L.L.C.
767 FIFTH AVENUE, 16TH FLOOR
NEW YORK, NY 10153		X			

Signatures		
/s/ Craig A. Huff		6/4/2015	
** Signature of Reporting Person		Date
	
/s/ Reservoir Capital Partners, L.P., by RCP GP, LLC, its general partner, by Craig A. Huff, Co-Chief Executive Officer		6/4/2015	
** Signature of Reporting Person		Date
	
/s/ Reservoir Capital Master Fund, L.P., by Reservoir Capital Group, L.L.C., its general partner, by Craig A. Huff, Co-Chief Executive Officer		6/4/2015	
** Signature of Reporting Person		Date
	
/s/ Daniel H. Stern		6/4/2015	
** Signature of Reporting Person		Date
	
/s/ RCGM, LLC, by Craig A. Huff, Senior Managing Director		6/4/2015	
** Signature of Reporting Person		Date
	
/s/ Reservoir Capital Group, L.L.C., by Craig A. Huff, Co-Chief Executive Officer		6/4/2015	
** Signature of Reporting Person		Date
	
/s/ Reservoir Capital Partners (Cayman), L.P., by Reservoir Capital Group, L.L.C., its general partner, by Craig A. Huff, Co-Chief Executive Officer		6/4/2015	
** Signature of Reporting Person		Date
	
/s/ RCP GP, LLC, by Craig A. Huff, Co-Chief Executive Officer		6/4/2015	
** 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).	
Note:	File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.	
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.