FORM 3
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Koch, Inc.
2. Date of Event Requiring Statement (Month/Day/Year)
08/01/2024		 3. Issuer Name and Ticker or Trading Symbol
ASPEN AEROGELS INC [ASPN]
(Last)
(First)
(Middle)
4111 E. 37TH STREET NORTH		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed (Month/Day/Year)
(Street)

WICHITA, KS 67220		 6. Individual or Joint/Group Filing (Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4) 		2. Amount of Securities Beneficially Owned
(Instr. 4) 		3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5) 		4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 12,280,426
D (1) (2)
 

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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4) 		2. Date Exercisable and Expiration Date
(Month/Day/Year) 		3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4) 		4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5) 		6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Convertible Senior PIK Toggle Notes due 2027 (3) 02/15/2022 02/18/2027 Common Stock 4,139,999 (4) $ 123,937,608 D (1) (2)  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Koch, Inc.
4111 E. 37TH STREET NORTH
WICHITA, KS 67220		     X    

Signatures

Koch, Inc., /s/ Raffaele G. Fazio, Assistant Secretary 08/02/2024
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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).
(1) Wood River Capital, LLC ("Wood River") is beneficially owned by SCC Holdings, LLC ("SCC"), SCC is beneficially owned by KIM, LLC ("KIM"), KIM is beneficially owned by Koch Investments Group, LLC ("KIG"), KIG is beneficially owned by Koch Investments Group Holdings, LLC ("KIGH"), KIGH is beneficially owned by Koch Companies, LLC ("KCLLC"), and KCLLC is beneficially owned by Koch, Inc., in each case by means of ownership of all voting equity instruments. Koch, Inc., KCLLC, KIGH, KIG, KIM, and SCC may be deemed to beneficially own the shares of common stock, par value $0.00001 per share, of Aspen Aerogels, Inc. (the "Issuer") held by Wood River by virtue of (i) Koch, Inc.'s beneficial ownership of KCLLC, (iii) KCLLC's beneficial ownership of KIGH, (iv) KIGH's beneficial ownership of KIG, (v) KIG's beneficial ownership of KIM, (vi) KIM's beneficial ownership of SCC, and (vii) SCC's beneficial ownership of Wood River.
(2) Effective August 1, 2024, pursuant to an internal reorganization, Koch, Inc. became the indirect ultimate parent of Wood River.
(3) On February 15, 2022, Wood River entered into a note purchase agreement (the "NPA") with the Issuer relating to the issuance and sale of $100,000,000 in aggregate principal amount of the Issuer's Convertible Senior PIK Toggle Notes due 2027, as amended by Amendment No. 1 to Convertible Senior PIK Toggle Notes Due 2027, dated November 28, 2022, by and between the Issuer and Wood River (as amended, the "Notes"). The Notes are convertible into shares of the Issuer's common stock at Wood River's option at any time until the business day prior to the maturity date.
(4) Represents 4,139,999 shares of the Issuer's common stock issuable to Wood River upon conversion of the principal amount represented by the PIK Interest Payment. The number of shares of common stock is calculated using the effective conversion price of $29.936625 per share of the Issuer's common stock as reported in the Issuer's Current Report on Form 8-K, filed on November 29, 2022. The conversion price is subject to adjustment upon the occurrence of certain dilutive events such as stock splits and combinations, stock dividends, mergers and spin-offs.

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