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 Shares Held, Excluding Options
Total Filers

13D/G Filers

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 Filers Shares, Excl. Options Value, Excl. Options
2026 Q3 60 14.1 M $77.5M
2026 Q2 181 73.6 M $467M
2026 Q1 169 69.3 M $237M
2025 Q4 186 70.2 M $199M
2025 Q3 206 72.8 M $506M
2025 Q2 186 71.8 M $426M
2025 Q1 225 71.3 M $458M
2024 Q4 235 73.1 M $869M
2024 Q3 247 70.2 M $1.93B
2024 Q2 226 71.2 M $1.70B
2024 Q1 169 76.6 M $1.35B
2023 Q4 173 76.0 M $1.20B
2023 Q3 162 67.8 M $583M
2023 Q2 161 66.5 M $525M
2023 Q1 159 69.5 M $516M
2022 Q4 165 68.1 M $803M
2022 Q3 142 37.3 M $344M
2022 Q2 151 37.1 M $367M
2022 Q1 152 33.5 M $1.16B
2021 Q4 163 28.6 M $1.43B
2021 Q3 132 27.6 M $1.27B
2021 Q2 118 28.4 M $850M
2021 Q1 86 23.7 M $525M
2020 Q4 77 22.3 M $372M
2020 Q3 73 21.1 M $231M
2020 Q2 68 18.3 M $123M
2020 Q1 61 21.6 M $134M
2019 Q4 49 18.0 M $139M
2019 Q3 42 16.4 M $97.2M
2019 Q2 36 16.1 M $115M
2019 Q1 35 16.3 M $41.5M
2018 Q4 36 16.7 M $35.6M
2018 Q3 45 16.6 M $75.8M
2018 Q2 45 16.8 M $82.3M
2018 Q1 51 16.9 M $72.4M
2017 Q4 48 16.8 M $81.8M
2017 Q3 51 17.6 M $76.5M
2017 Q2 45 17.6 M $78.0M
2017 Q1 44 17.6 M $72.9M
2016 Q4 54 17.3 M $71.3M
2016 Q3 53 17.6 M $105M
2016 Q2 58 18.4 M $91.4M
2016 Q1 54 17.9 M $80.7M
2015 Q4 47 18.5 M $112M
2015 Q3 55 18.2 M $137M
2015 Q2 45 18.4 M $122M
2015 Q1 45 18.8 M $137M
2014 Q4 38 19.2 M $153M
2014 Q3 41 19.5 M $196M
2014 Q2 29 19.4 M $214M