VANGUARD GROUP INC 13D and 13G filings for Aspen Aerogels, Inc.:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2026-03-26 4:09 pm Sale | 2026-03-13 | 13G | ASPEN AEROGELS, INC ASPN | VANGUARD GROUP INC | 0 0.000% | -4,133,995 (Position Closed) | Filing |
| 2024-11-12 1:22 pm Unchanged | 2024-09-30 | 13G | ASPEN AEROGELS, INC ASPN | VANGUARD GROUP INC | 4,133,995 5.360% | 0 (Unchanged) | Filing |
| 2024-11-04 11:18 am Purchase | 2024-09-30 | 13G | ASPEN AEROGELS, INC ASPN | VANGUARD GROUP INC | 4,133,995 5.360% | 4,133,995 (New Position) | Filing |