Aspen Aerogels Inc (NYSE:ASPN) appears in 177 institutional 13F filings for the quarter ending December 2025.
| Owner Name | Date | Shares Held | Change (QoQ) | Change (%) | Value (USD) |
|---|---|---|---|---|---|
| KIM, LLC | 31 Mar, 2026 | 12,280,426 | 0 | 0.00% | $41,999,057.00 |
| OAKTOP CAPITAL MANAGEMENT II, L.P. | 31 Mar, 2026 | 5,168,674 | 774,149 | 17.62% | $17,676,865.00 |
| BlackRock, Inc. | 31 Mar, 2026 | 4,743,076 | -186,163 | -3.78% | $16,221,320.00 |
| NEEDHAM INVESTMENT MANAGEMENT LLC | 31 Mar, 2026 | 4,518,775 | 167,075 | 3.84% | $15,454,211.00 |
| VANGUARD CAPITAL MANAGEMENT LLC | 31 Mar, 2026 | 3,436,156 | 3,436,156 | 0.00% | $11,751,654.00 |
| GEORGE KAISER FAMILY FOUNDATION | 31 Mar, 2026 | 3,167,322 | 0 | 0.00% | $10,832,241.00 |
| State Street Corp | 31 Mar, 2026 | 2,320,727 | -180,742 | -7.23% | $7,936,886.00 |
| Invesco Ltd. | 31 Mar, 2026 | 2,298,183 | -1,831,751 | -44.35% | $7,859,786.00 |
| GAGNON SECURITIES LLC | 31 Mar, 2026 | 1,861,851 | 728,603 | 64.29% | $6,367,530.00 |
| RICE HALL JAMES & ASSOCIATES, LLC | 31 Mar, 2026 | 1,552,628 | 131,023 | 9.22% | $5,309,988.00 |
| GEODE CAPITAL MANAGEMENT, LLC | 31 Mar, 2026 | 1,540,771 | -61,278 | -3.82% | $5,271,080.00 |
| Ameriprise Financial Inc | 31 Mar, 2026 | 1,506,379 | 128,095 | 9.29% | $5,151,816.00 |
| MILLENNIUM MANAGEMENT LLC | 31 Mar, 2026 | 1,404,675 | 533,724 | 61.28% | $4,803,988.00 |
| MARSHALL WACE, LLP | 31 Mar, 2026 | 1,263,102 | 708,922 | 127.92% | $4,319,807.00 |
| DIMENSIONAL FUND ADVISORS LP | 31 Mar, 2026 | 1,256,480 | -747,483 | -37.30% | $4,296,033.00 |
| AMERICAN CENTURY COMPANIES INC | 31 Mar, 2026 | 1,247,783 | 89,805 | 7.76% | $4,267,418.00 |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 31 Mar, 2026 | 1,218,779 | 1,078,666 | 769.85% | $4,168,224.00 |
| Telemark Asset Management, LLC | 31 Mar, 2026 | 1,000,000 | 0 | 0.00% | $3,420,000.00 |
| ROYCE & ASSOCIATES LP | 31 Mar, 2026 | 986,513 | 986,513 | 0.00% | $3,373,874.00 |
| Jpmorgan Chase & Co | 31 Mar, 2026 | 965,492 | -518,253 | -34.93% | $3,060,610.00 |