Aspen Aerogels, Inc.

Historical 13F Holders

Symbol
ASPN
CUSIP
04523Y105
All holders as of
Q2 2026
Type
Equity
Class
COM
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Each filer's latest filing for 04523Y105 since 12/18/2024, largest first.

Filer % of Class Filed
Orin Hirschman 13G
8.6% 10/19/2026
Event 9/30/2026
Oaktop Capital Management II, L.P. 13G/A 5.4% 5/15/2025
Event 3/31/2025
Under 5%, checked the "5 percent or less" box, or amended by a later filing (4)
Needham Investment Management L.L.C. 13G/A
3.9% 8/13/2026
Event 6/30/2026
FMR LLC 13G/A
1.5% 2/12/2025
Event 12/31/2024
Vanguard Group Inc 13G/A 0% 3/26/2026
Event 3/13/2026
Wood River Capital, LLC 13D/A
0% 9/24/2026
Event 9/23/2026

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q3 11 360 k $1.98 M
2026 Q2 189 73.6 M $467 M
2026 Q1 177 69.3 M $237 M
2025 Q4 199 70.2 M $199 M
2025 Q3 219 72.7 M $506 M
2025 Q2 200 71.9 M $426 M
2025 Q1 240 71.3 M $458 M
2024 Q4 258 73.1 M $869 M
2024 Q3 268 70.2 M $1.93 B
2024 Q2 245 71.2 M $1.70 B
2024 Q1 184 76.6 M $1.35 B
2023 Q4 189 76.0 M $1.20 B
2023 Q3 174 67.8 M $583 M
2023 Q2 171 66.5 M $525 M
2023 Q1 167 67.2 M $499 M
2022 Q4 180 68.1 M $803 M
2022 Q3 151 37.3 M $344 M
2022 Q2 164 37.1 M $367 M
2022 Q1 162 33.5 M $1.16 B
2021 Q4 181 28.6 M $1.43 B
2021 Q3 145 27.6 M $1.27 B
2021 Q2 132 28.4 M $850 M
2021 Q1 94 23.7 M $525 M
2020 Q4 80 22.3 M $372 M
2020 Q3 75 21.1 M $231 M
2020 Q2 70 18.3 M $123 M
2020 Q1 64 21.6 M $134 M
2019 Q4 53 18.0 M $139 M
2019 Q3 43 16.4 M $97.2 M
2019 Q2 37 16.1 M $115 M
2019 Q1 35 16.3 M $41.5 M
2018 Q4 38 16.7 M $35.6 M
2018 Q3 46 16.6 M $75.8 M
2018 Q2 46 16.8 M $82.3 M
2018 Q1 52 16.9 M $72.4 M
2017 Q4 48 16.8 M $81.8 M
2017 Q3 51 17.6 M $76.5 M
2017 Q2 45 17.6 M $78.0 M
2017 Q1 45 17.6 M $72.9 M
2016 Q4 55 17.3 M $71.3 M
2016 Q3 53 17.6 M $105 M
2016 Q2 59 18.4 M $91.4 M
2016 Q1 54 17.9 M $80.7 M
2015 Q4 47 18.5 M $112 M
2015 Q3 55 18.2 M $137 M
2015 Q2 45 18.4 M $122 M
2015 Q1 45 18.8 M $137 M
2014 Q4 38 19.2 M $153 M
2014 Q3 42 19.5 M $196 M
2014 Q2 30 19.4 M $214 M