| | | | | | | | | | | | | | | | | | | | | |
Ownership Document |
Schema Version: X0508 |
Document Type: 4 |
Period of Report: 3/8/24 |
Issuer: |
| Issuer CIK: 1145986 |
| Issuer Name: ASPEN AEROGELS INC |
| Issuer Trading Symbol: ASPN |
Reporting Owner: |
| Reporting Owner ID: |
| | Owner CIK: 1610273 |
| | Owner Name: Whitaker Corby C |
| Reporting Owner Address: |
| | Owner Street 1: C/O ASPEN AEROGELS, INC., |
| | Owner Street 2: 30 FORBES ROAD, BLDG B |
| | Owner City: NORTHBOROUGH |
| | Owner State: MA |
| | Owner ZIP Code: 01532 |
| | Owner State Description: |
| Reporting Owner Relationship: |
| | Is Director? No |
| | Is Officer? Yes |
| | Is Ten Percent Owner? No |
| | Is Other? No |
| | Officer Title: SVP, Sales and Marketing |
Aff 10b5 One? No |
Non-Derivative Table: |
| Non-Derivative Transaction: |
| | Security Title: |
| | | Value: Common Stock |
| | Transaction Date: |
| | | Value: 3/8/24 |
| | Transaction Coding: |
| | | Transaction Form Type: 4 |
| | | Transaction Code: F |
| | | Equity Swap Involved? No |
| | Transaction Amounts: |
| | | Transaction Shares: |
| Value: 1,768 |
| Footnote ID: F1 |
| | | Transaction Price Per Share: |
| Value: 17.02 |
| | | Transaction Acquired-Disposed Code: |
| Value: D |
| | Post-Transaction Amounts: |
| | | Shares Owned Following Transaction: |
| Value: 131,533 |
| Footnote ID: F2 |
| | Ownership Nature: |
| | | Direct or Indirect Ownership: |
| Value: D |
Footnotes: |
| Footnote - F1: Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units ("RSUs"). |
| Footnote - F2: Represents 111,062 shares of Common Stock and 20,471RSUs. |
Owner Signature: |
| Signature Name: /s/ Virginia H. Johnson, Attorney-in-Fact |
| Signature Date: 3/11/24 |