Aspen Aerogels INC Schedule 13G passive stakes
Filed when an investor crosses five percent without intending to seek control — the passive counterpart to a 13D.
NYSE
Needham Investment Management L.L.C., Needham Asset Management, LLC, and George A. Needham have jointly filed a Schedule 13G, reporting beneficial ownership of 3,260,800 shares of Aspen Aerogels Inc. common stock, representing 3.9% of the class.
NYSE
The Vanguard Group reports zero beneficial ownership in Aspen Aerogels Inc. following an internal realignment that disaggregated reporting.
NYSE
Needham Investment Management, Needham Asset Management, and George A. Needham jointly reported a 5.3% beneficial ownership stake in Aspen Aerogels Inc. as of December 31, 2025.
NYSE
Oaktop Capital Management II, L.P. has filed an amended Schedule 13G, reporting a 5.35% beneficial ownership stake in Aspen Aerogels, Inc. as of March 31, 2025.
NYSE
Oaktop Capital Management II, L.P. has filed an amended Schedule 13G, reporting a 5.35% beneficial ownership stake in Aspen Aerogels, Inc. as of March 31, 2025.
NYSE
SCHEDULE 13G/A: FMR LLC and Abigail P. Johnson Report 1.5% Beneficial Ownership in Aspen Aerogels Inc.
FMR LLC and its Chairman and CEO, Abigail P. Johnson, have reported a combined beneficial ownership of 1.5% of Aspen Aerogels Inc.'s common stock as of December 31, 2024.