Aspen Aerogels Ownership | Who Owns Aspen Aerogels?
Aspen Aerogels Ownership Summary
Aspen Aerogels is owned by 19.21% institutional investors, 16.30% insiders, and 64.49% retail investors. Kim is the largest institutional shareholder, holding 14.94% of ASPN shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 3.13% of its assets in Aspen Aerogels shares.
ASPN Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Aspen Aerogels | 19.21% | 16.30% | 64.49% |
| Sector | Industrials Stocks | 46.77% | 12.62% | 40.60% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Kim | 12.28M | 14.94% | $85.47M |
| Blackrock funding, inc. /de | 4.98M | 6.06% | $34.64M |
| Vanguard group | 4.51M | 5.49% | $31.39M |
| Oaktop capital management ii | 4.39M | 5.35% | $30.59M |
| Needham investment management | 3.44M | 4.19% | $23.94M |
| George kaiser family foundation | 3.17M | 3.85% | $22.04M |
| Dimensional fund advisors lp | 2.25M | 2.74% | $15.67M |
| State street | 1.94M | 2.37% | $13.53M |
| Telemark asset management | 1.79M | 2.18% | $12.48M |
| Gagnon securities | 1.75M | 2.14% | $12.21M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Kim | 12.28M | 7.46% | $85.47M |
| George kaiser family foundation | 3.17M | 3.09% | $22.04M |
| Oaktop capital management ii | 4.39M | 2.77% | $30.59M |
| Gagnon securities | 1.75M | 2.45% | $12.21M |
| Gagnon advisors | 565.57K | 2.43% | $3.94M |
| Peregrine investment management | 600.00K | 2.05% | $4.18M |
| Needham investment management | 3.44M | 1.67% | $23.94M |
| Firsthand capital management | 125.00K | 1.46% | $870.00K |
| Telemark asset management | 1.79M | 1.18% | $12.48M |
| Awm investment company | 1.56M | 1.01% | $10.83M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Millennium management | 1.62M | 0.01% | 1.59M |
| Peregrine investment management | 600.00K | 2.05% | 600.00K |
| First eagle investment management | 517.32K | 0.01% | 517.32K |
| Tudor investment corp et al | 486.60K | 0.01% | 486.60K |
| American century companies | 471.31K | 0.00% | 456.27K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Driehaus capital management | - | - | -2.55M |
| Encompass capital advisors | - | - | -1.70M |
| Loomis sayles & co l p | - | - | -1.62M |
| Federated hermes | 289.93K | 0.00% | -1.48M |
| Unisuper management pty | - | - | -848.29K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Peregrine investment management | 600.00K | 2.05% | 600.00K | $4.18M |
| First eagle investment management | 517.32K | 0.01% | 517.32K | $3.60M |
| Point72 asset management | 184.30K | 0.00% | 184.30K | $1.28M |
| Los angeles capital management | 139.21K | 0.00% | 139.21K | $968.92K |
| Atom investors lp | 82.65K | 0.04% | 82.65K | $575.23K |
Sold Out
| Holder | Change |
|---|---|
| Tfc financial management | -2.00 |
| Creekmur asset management | -3.00 |
| Skopos labs | -5.00 |
| Federation des caisses desjardins du quebec | -15.00 |
| Capital performance advisors llp | -15.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Sep 30, 2025 | 73 | -62.94% | 15,786,490 | -77.92% | 19 | 0.25% | 39 | -60.20% | 15 | -74.58% |
| Jun 30, 2025 | 196 | -15.88% | 71,447,619 | 0.55% | 86 | 1.16% | 98 | -20.97% | 59 | -14.49% |
| Mar 31, 2025 | 235 | -7.48% | 71,266,344 | -2.34% | 86 | 0.95% | 125 | -22.36% | 70 | 55.56% |
| Dec 31, 2024 | 248 | -6.06% | 71,699,845 | 2.19% | 94 | 1.11% | 154 | 8.45% | 46 | -30.30% |
| Sep 30, 2024 | 262 | 10.55% | 70,144,949 | -0.59% | 91 | 1.06% | 140 | 3.70% | 66 | 4.76% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard Total Stock Mkt Idx Inv | 2.57M | 3.13% | -57.08K |
| Vanguard US Total Market Shares ETF | 2.41M | 2.94% | 2.16K |
| Needham Aggressive Growth Retail | 1.62M | 1.97% | 120.00K |
| iShares Russell 2000 ETF | 1.58M | 1.92% | - |
| Federated Hermes MDT SCC Institutional | 1.04M | 1.27% | 1.04M |
| Federated Hermes MDT Small Cap Core IS | 1.04M | 1.27% | 1.04M |
| Loomis Sayles Small Cap Growth Instl | 918.28K | 1.12% | -9.94K |
| American Century Small Cap Growth Inv | 791.75K | 0.96% | -185.46K |
| American Century U.S. Small Cap Growth | 791.75K | 0.96% | -185.46K |
| Needham Small Cap Growth Retail | 774.50K | 0.94% | 74.50K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Nov 13, 2025 | Young Donald R | President and CEO | Sell | $183.61K |
| Aug 12, 2025 | Daniel Santhosh P | Chief Accounting Officer | Sell | $32.24K |
| Aug 13, 2025 | Daniel Santhosh P | Chief Accounting Officer | Sell | $15.08K |
| May 12, 2025 | Young Donald R | President and CEO | Buy | $107.00K |
| Sep 30, 2024 | Young Donald R | President and CEO | Sell | $1.90M |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2028 Q1 | - | - |
| 2025 Q4 | - | - |
| 2025 Q3 | - | 2 |
| 2025 Q2 | 1 | - |
| 2025 Q1 | - | - |
ASPN Ownership FAQ
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