Fund shareholders of Aspen Aerogels Inc
ISIN US04523Y1055 · United States
- Fund shareholders
- 169
- Of which ETFs
- 40 129 other funds
- Value held
- ≈ 138.7M $ 138.6M $ · 59K €
- Share of capital
- 28.2 % of 83M shares on Aug 4, 2026
| Fund | Shares | Value | Weight in fund | Share of capital | |
|---|---|---|---|---|---|
| VANGUARD TOTAL STOCK MARKET INDEX FUND VANGUARD INDEX FUNDS | 2,642,312 | 16.8M $ | 0.00 % | 3.18 % | as of Jun 30, 2026 ↗ |
| Needham Aggressive Growth Fund Needham Funds Inc | 2,075,000 | 13.2M $ | 0.50 % | 2.50 % | as of Jun 30, 2026 ↗ |
| iShares Russell 2000 ETF iShares Trust | 1,764,384 | 11.2M $ | 0.01 % | 2.13 % | as of Jun 30, 2026 ↗ |
| Avantis U.S. Small Cap Value ETF American Century ETF Trust | 1,319,932 | 8.4M $ | 0.03 % | 1.59 % | as of May 31, 2026 ↗ |
| Invesco WilderHill Clean Energy ETF Invesco Exchange-Traded Fund Trust | 1,153,459 | 5.3M $ | 1.27 % | 1.39 % | as of Jul 31, 2026 ↗ |
| Columbia Small Cap Value Discovery Fund COLUMBIA FUNDS SERIES TRUST I | 1,101,870 | 5.1M $ | 0.20 % | 1.33 % | as of Jul 31, 2026 ↗ |
| State Street(R) SPDR(R) S&P Kensho New Economies Composite ETF SPDR SERIES TRUST | 1,077,261 | 6.8M $ | 0.24 % | 1.30 % | as of Jun 30, 2026 ↗ |
| VANGUARD EXTENDED MARKET INDEX FUND VANGUARD INDEX FUNDS | 810,429 | 5.1M $ | 0.01 % | 0.98 % | as of Jun 30, 2026 ↗ |
| Fidelity Small Cap Index Fund Fidelity Salem Street Trust | 740,120 | 3.4M $ | 0.01 % | 0.89 % | as of Jul 31, 2026 ↗ |
| iShares Russell 2000 Value ETF iShares Trust | 625,823 | 4M $ | 0.03 % | 0.75 % | as of Jun 30, 2026 ↗ |
| Royce Small-Cap Opportunity Fund ROYCE FUND | 624,319 | 4M $ | 0.28 % | 0.75 % | as of Jun 30, 2026 ↗ |
| Federated Hermes MDT Small Cap Core Fund Federated Hermes MDT Series | 603,353 | 2.8M $ | 0.12 % | 0.73 % | as of Jul 31, 2026 ↗ |
| Needham Small Cap Growth Fund Needham Funds Inc | 600,000 | 3.8M $ | 0.91 % | 0.72 % | as of Jun 30, 2026 ↗ |
| Fidelity Extended Market Index Fund Fidelity Concord Street Trust | 362,884 | 2.3M $ | 0.01 % | 0.44 % | as of May 31, 2026 ↗ |
| Needham Growth Fund Needham Funds Inc | 350,000 | 2.2M $ | 0.76 % | 0.42 % | as of Jun 30, 2026 ↗ |
| VANGUARD RUSSELL 2000 INDEX FUND VANGUARD SCOTTSDALE FUNDS | 340,787 | 2.2M $ | 0.01 % | 0.41 % | as of May 31, 2026 ↗ |
| Clearwater Select Equity Fund Clearwater Investment Trust | 334,930 | 2.1M $ | 0.41 % | 0.40 % | as of Jun 30, 2026 ↗ |
| Schwab U.S. Small-Cap ETF SCHWAB STRATEGIC TRUST | 331,366 | 2.1M $ | 0.01 % | 0.40 % | as of May 31, 2026 ↗ |
| Dimensional U.S. Targeted Value ETF Dimensional ETF Trust | 279,316 | 1.3M $ | 0.01 % | 0.34 % | as of Jul 31, 2026 ↗ |
| Multi-Manager Small Cap Equity Strategies Fund COLUMBIA FUNDS SERIES TRUST I | 241,835 | 1.5M $ | 0.12 % | 0.29 % | as of May 31, 2026 ↗ |
| iShares Micro-Cap ETF iShares Trust | 228,323 | 1.4M $ | 0.10 % | 0.28 % | as of Jun 30, 2026 ↗ |
| Invesco RAFI US 1500 Small-Mid ETF Invesco Exchange-Traded Fund Trust | 208,797 | 966.7K $ | 0.04 % | 0.25 % | as of Jul 31, 2026 ↗ |
| DWS Global Small Cap Fund DEUTSCHE DWS GLOBAL/INTERNATIONAL FUND, INC. | 206,899 | 957.9K $ | 0.48 % | 0.25 % | as of Jul 31, 2026 ↗ |
| First Trust NASDAQ Clean Edge Green Energy Index Fund First Trust Exchange-Traded Fund | 205,271 | 1.3M $ | 0.16 % | 0.25 % | as of Jun 30, 2026 ↗ |
| VANGUARD MATERIALS INDEX FUND VANGUARD WORLD FUND | 203,987 | 1.3M $ | 0.03 % | 0.25 % | as of May 31, 2026 ↗ |
| Columbia Variable Portfolio - Small Cap Value Discovery Fund COLUMBIA FUNDS VARIABLE INSURANCE TRUST | 199,330 | 1.3M $ | 0.28 % | 0.24 % | as of Jun 30, 2026 ↗ |
| Dimensional US Small Cap Value ETF Dimensional ETF Trust | 197,730 | 915.5K $ | 0.01 % | 0.24 % | as of Jul 31, 2026 ↗ |
| U.S. Targeted Value Portfolio DFA INVESTMENT DIMENSIONS GROUP INC | 178,917 | 828.4K $ | 0.00 % | 0.22 % | as of Jul 31, 2026 ↗ |
| Schwab Small-Cap Index Fund SCHWAB CAPITAL TRUST | 166,006 | 768.6K $ | 0.01 % | 0.20 % | as of Jul 31, 2026 ↗ |
| Inspire Small/Mid Cap ETF Northern Lights Fund Trust IV | 157,856 | 1M $ | 0.32 % | 0.19 % | as of May 31, 2026 ↗ |
| SMALL CAP EQUITY FUND GuideStone Funds | 155,241 | 984.2K $ | 0.09 % | 0.19 % | as of Jun 30, 2026 ↗ |
| NVIT Multi-Manager Small Company Fund Nationwide Variable Insurance Trust | 155,113 | 983.4K $ | 0.22 % | 0.19 % | as of Jun 30, 2026 ↗ |
| NVIT Small Cap Value Fund Nationwide Variable Insurance Trust | 143,439 | 909.4K $ | 0.41 % | 0.17 % | as of Jun 30, 2026 ↗ |
| U.S. MICRO CAP PORTFOLIO DFA INVESTMENT DIMENSIONS GROUP INC | 141,736 | 656.2K $ | 0.01 % | 0.17 % | as of Jul 31, 2026 ↗ |
| Fidelity Total Market Index Fund Fidelity Concord Street Trust | 133,608 | 855.1K $ | 0.00 % | 0.16 % | as of May 31, 2026 ↗ |
| ALPS Clean Energy ETF ALPS ETF TRUST | 129,008 | 825.7K $ | 0.57 % | 0.16 % | as of May 31, 2026 ↗ |
| Master Small Cap Index Series Quantitative Master Series LLC | 126,936 | 804.8K $ | 0.01 % | 0.15 % | as of Jun 30, 2026 ↗ |
| Avantis U.S. Small Cap Value Fund American Century ETF Trust | 126,817 | 811.6K $ | 0.05 % | 0.15 % | as of May 31, 2026 ↗ |
| U.S. SMALL CAP PORTFOLIO DFA INVESTMENT DIMENSIONS GROUP INC | 121,715 | 563.5K $ | 0.00 % | 0.15 % | as of Jul 31, 2026 ↗ |
| Ultra-Small Company Market Fund Bridgeway Funds, Inc. | 110,000 | 697.4K $ | 0.47 % | 0.13 % | as of Jun 30, 2026 ↗ |
| U.S. SMALL CAP VALUE PORTFOLIO DFA INVESTMENT DIMENSIONS GROUP INC | 108,307 | 501.5K $ | 0.00 % | 0.13 % | as of Jul 31, 2026 ↗ |
| Fidelity Series Total Market Index Fund Fidelity Concord Street Trust | 105,268 | 673.7K $ | 0.00 % | 0.13 % | as of May 31, 2026 ↗ |
| Fidelity Small Cap Value Index Fund Fidelity Salem Street Trust | 94,901 | 601.7K $ | 0.03 % | 0.11 % | as of Jun 30, 2026 ↗ |
| Firsthand Technology Opportunities Fund Firsthand Funds | 90,000 | 570.6K $ | 1.11 % | 0.11 % | as of Jun 30, 2026 ↗ |
| Nuveen Small Cap Blend Index Fund TIAA-CREF Funds | 89,805 | 415.8K $ | 0.01 % | 0.11 % | as of Jul 31, 2026 ↗ |
| iShares Core S&P Total U.S. Stock Market ETF iShares Trust | 81,499 | 516.7K $ | 0.00 % | 0.10 % | as of Jun 30, 2026 ↗ |
| DWS Global Small Cap VIP DEUTSCHE DWS VARIABLE SERIES I | 79,715 | 505.4K $ | 0.63 % | 0.10 % | as of Jun 30, 2026 ↗ |
| Avantis U.S. Small Cap Equity ETF American Century ETF Trust | 79,328 | 507.7K $ | 0.02 % | 0.10 % | as of May 31, 2026 ↗ |
| EQ/2000 Managed Volatility Portfolio EQ Advisors Trust | 76,836 | 487.1K $ | 0.01 % | 0.09 % | as of Jun 30, 2026 ↗ |
| Dimensional U.S. Small Cap ETF Dimensional ETF Trust | 68,325 | 316.3K $ | 0.00 % | 0.08 % | as of Jul 31, 2026 ↗ |
| Federated Hermes MDT Small Cap Value Fund f/k/a Federated Hermes Clover Small Value Fund Federated Hermes Equity Funds | 67,720 | 429.3K $ | 0.25 % | 0.08 % | as of Jun 30, 2026 ↗ |
| Fidelity Enhanced Small Cap Core ETF Fidelity Covington Trust | 63,908 | 405.2K $ | 0.01 % | 0.08 % | as of Jun 30, 2026 ↗ |
| Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF Goldman Sachs ETF Trust | 56,874 | 364K $ | 0.04 % | 0.07 % | as of May 31, 2026 ↗ |
| State Street(R) SPDR(R) S&P Kensho Smart Mobility ETF SPDR SERIES TRUST | 56,541 | 358.5K $ | 1.60 % | 0.07 % | as of Jun 30, 2026 ↗ |
| Goldman Sachs Small Cap Value Insights Fund Goldman Sachs Trust | 55,217 | 255.7K $ | 0.02 % | 0.07 % | as of Jul 31, 2026 ↗ |
| VANGUARD RUSSELL 2000 VALUE INDEX FUND VANGUARD SCOTTSDALE FUNDS | 53,261 | 340.9K $ | 0.03 % | 0.06 % | as of May 31, 2026 ↗ |
| VANGUARD U.S. QUALITY FACTOR ETF VANGUARD WELLINGTON FUND | 53,148 | 340.1K $ | 0.07 % | 0.06 % | as of May 31, 2026 ↗ |
| Federated Hermes MDT Small Cap Core ETF Federated Hermes ETF Trust | 50,292 | 321.9K $ | 0.12 % | 0.06 % | as of May 31, 2026 ↗ |
| Nuveen Equity Index Fund TIAA-CREF Funds | 47,296 | 219K $ | 0.00 % | 0.06 % | as of Jul 31, 2026 ↗ |
| Small-Cap Value Portfolio PACIFIC SELECT FUND | 45,075 | 285.8K $ | 0.07 % | 0.05 % | as of Jun 30, 2026 ↗ |
| VANGUARD BALANCED INDEX FUND VANGUARD VALLEY FORGE FUNDS | 44,883 | 284.6K $ | 0.00 % | 0.05 % | as of Jun 30, 2026 ↗ |
| AQR Small Cap Multi-Style Fund AQR Funds | 44,820 | 284.2K $ | 0.07 % | 0.05 % | as of Jun 30, 2026 ↗ |
| LVIP State Street Small-Cap Index Fund LINCOLN VARIABLE INSURANCE PRODUCTS TRUST | 44,400 | 281.5K $ | 0.01 % | 0.05 % | as of Jun 30, 2026 ↗ |
| EQ/Small Company Index Portfolio EQ Advisors Trust | 43,450 | 275.5K $ | 0.01 % | 0.05 % | as of Jun 30, 2026 ↗ |
| Dimensional U.S. Core Equity 2 ETF Dimensional ETF Trust | 42,563 | 197.1K $ | 0.00 % | 0.05 % | as of Jul 31, 2026 ↗ |
| VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND VANGUARD INSTITUTIONAL INDEX FUNDS | 41,919 | 265.8K $ | 0.00 % | 0.05 % | as of Jun 30, 2026 ↗ |
| Goldman Sachs Small Cap Equity Insights Fund Goldman Sachs Trust | 40,343 | 186.8K $ | 0.02 % | 0.05 % | as of Jul 31, 2026 ↗ |
| Schwab U.S. Broad Market ETF SCHWAB STRATEGIC TRUST | 38,919 | 249.1K $ | 0.00 % | 0.05 % | as of May 31, 2026 ↗ |
| Fidelity ZERO Total Market Index Fund Fidelity Concord Street Trust | 38,222 | 177K $ | 0.00 % | 0.05 % | as of Jul 31, 2026 ↗ |
| U.S. VECTOR EQUITY PORTFOLIO DFA INVESTMENT DIMENSIONS GROUP INC | 37,872 | 175.3K $ | 0.00 % | 0.05 % | as of Jul 31, 2026 ↗ |
| Firsthand Alternative Energy Fund Firsthand Funds | 35,000 | 221.9K $ | 1.33 % | 0.04 % | as of Jun 30, 2026 ↗ |
| Schwab Total Stock Market Index Fund SCHWAB CAPITAL TRUST | 34,000 | 157.4K $ | 0.00 % | 0.04 % | as of Jul 31, 2026 ↗ |
| Global X Russell 2000 ETF GLOBAL X FUNDS | 32,446 | 150.2K $ | 0.01 % | 0.04 % | as of Jul 31, 2026 ↗ |
| Small Cap Index Fund Northern Funds | 32,337 | 205K $ | 0.01 % | 0.04 % | as of Jun 30, 2026 ↗ |
| Bridge Builder Small/Mid Cap Value Fund Bridge Builder Trust | 29,336 | 186K $ | 0.00 % | 0.04 % | as of Jun 30, 2026 ↗ |
| Franklin Small Cap Enhanced ETF Franklin Templeton ETF Trust | 28,705 | 182K $ | 0.15 % | 0.03 % | as of Jun 30, 2026 ↗ |
| Fidelity ZERO Extended Market Index Fund Fidelity Concord Street Trust | 25,704 | 119K $ | 0.00 % | 0.03 % | as of Jul 31, 2026 ↗ |
| Small Cap Index Fund VALIC Co I | 25,594 | 163.8K $ | 0.01 % | 0.03 % | as of May 31, 2026 ↗ |
| ATM Small Cap Managed Volatility Portfolio EQ Advisors Trust | 25,416 | 161.1K $ | 0.01 % | 0.03 % | as of Jun 30, 2026 ↗ |
| Dimensional U.S. Equity Market ETF Dimensional ETF Trust | 25,169 | 116.5K $ | 0.00 % | 0.03 % | as of Jul 31, 2026 ↗ |
| U.S. Small Cap Equity Fund RUSSELL INVESTMENT CO | 25,113 | 116.3K $ | 0.01 % | 0.03 % | as of Jul 31, 2026 ↗ |
| STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO STATE STREET INSTITUTIONAL INVESTMENT TRUST | 24,100 | 152.8K $ | 0.00 % | 0.03 % | as of Jun 30, 2026 ↗ |
| Innovator U.S. Small Cap Managed Floor ETF Innovator ETFs Trust | 23,180 | 107.3K $ | 0.12 % | 0.03 % | as of Jul 31, 2026 ↗ |
| MetLife Russell 2000 Index Portfolio Brighthouse Funds Trust II | 22,827 | 144.7K $ | 0.01 % | 0.03 % | as of Jun 30, 2026 ↗ |
| AST PGIM Aggressive Multi-Asset Portfolio Advanced Series Trust | 21,600 | 136.9K $ | 0.00 % | 0.03 % | as of Jun 30, 2026 ↗ |
| Diversified Equity Alpha Master Portfolio Master Investment Portfolio | 21,393 | 135.6K $ | 0.00 % | 0.03 % | as of Jun 30, 2026 ↗ |
| EQ/AB Small Cap Growth Portfolio EQ Advisors Trust | 20,630 | 130.8K $ | 0.01 % | 0.02 % | as of Jun 30, 2026 ↗ |
| U.S. Sustainability Core 1 Portfolio DFA INVESTMENT DIMENSIONS GROUP INC | 19,430 | 90K $ | 0.00 % | 0.02 % | as of Jul 31, 2026 ↗ |
| Dimensional US Core Equity Market ETF Dimensional ETF Trust | 19,240 | 89.1K $ | 0.00 % | 0.02 % | as of Jul 31, 2026 ↗ |
| Venerable US Small Cap Fund Venerable Variable Insurance Trust | 19,202 | 121.7K $ | 0.07 % | 0.02 % | as of Jun 30, 2026 ↗ |
| Small-Cap Index Portfolio PACIFIC SELECT FUND | 18,523 | 117.4K $ | 0.01 % | 0.02 % | as of Jun 30, 2026 ↗ |
| T. Rowe Price Extended Equity Market Index Fund T. ROWE PRICE INDEX TRUST, INC. | 16,921 | 107.3K $ | 0.01 % | 0.02 % | as of Jun 30, 2026 ↗ |
| iShares Russell 3000 ETF iShares Trust | 15,813 | 100.3K $ | 0.00 % | 0.02 % | as of Jun 30, 2026 ↗ |
| 1290 VT Micro Cap Portfolio EQ Advisors Trust | 15,226 | 96.5K $ | 0.04 % | 0.02 % | as of Jun 30, 2026 ↗ |
| Small Cap Index Trust John Hancock Variable Insurance Trust | 14,171 | 89.8K $ | 0.01 % | 0.02 % | as of Jun 30, 2026 ↗ |
| NVIT Small Cap Index Fund Nationwide Variable Insurance Trust | 13,935 | 88.3K $ | 0.01 % | 0.02 % | as of Jun 30, 2026 ↗ |
| JNL/DFA U.S. Small Cap Fund JNL Series Trust | 13,498 | 85.6K $ | 0.01 % | 0.02 % | as of Jun 30, 2026 ↗ |
| iShares Energy Storage & Materials ETF iShares Trust | 12,033 | 55.7K $ | 0.08 % | 0.01 % | as of Jul 31, 2026 ↗ |
| Fidelity Flex Small Cap Index Fund Fidelity Salem Street Trust | 11,105 | 51.4K $ | 0.01 % | 0.01 % | as of Jul 31, 2026 ↗ |
| DWS Small Cap Index VIP DEUTSCHE DWS INVESTMENTS VIT FUNDS | 10,669 | 67.6K $ | 0.01 % | 0.01 % | as of Jun 30, 2026 ↗ |
The funds most exposed to it
The weight is the share of a fund's net assets. The holders table ranks funds by number of shares. This one ranks them by the weight of the company in each fund.
| Fund | Weight in fund | |
|---|---|---|
| State Street(R) SPDR(R) S&P Kensho Smart Mobility ETF SPDR SERIES TRUST | 1.60 % | as of Jun 30, 2026 ↗ |
| Firsthand Alternative Energy Fund Firsthand Funds | 1.33 % | as of Jun 30, 2026 ↗ |
| Invesco WilderHill Clean Energy ETF Invesco Exchange-Traded Fund Trust | 1.27 % | as of Jul 31, 2026 ↗ |
| Firsthand Technology Opportunities Fund Firsthand Funds | 1.11 % | as of Jun 30, 2026 ↗ |
| Needham Small Cap Growth Fund Needham Funds Inc | 0.91 % | as of Jun 30, 2026 ↗ |
| Needham Growth Fund Needham Funds Inc | 0.76 % | as of Jun 30, 2026 ↗ |
| DWS Global Small Cap VIP DEUTSCHE DWS VARIABLE SERIES I | 0.63 % | as of Jun 30, 2026 ↗ |
| ALPS Clean Energy ETF ALPS ETF TRUST | 0.57 % | as of May 31, 2026 ↗ |
| Needham Aggressive Growth Fund Needham Funds Inc | 0.50 % | as of Jun 30, 2026 ↗ |
| DWS Global Small Cap Fund DEUTSCHE DWS GLOBAL/INTERNATIONAL FUND, INC. | 0.48 % | as of Jul 31, 2026 ↗ |
Quarter after quarter
Each row is one quarter of SEC filings, newest first. The change compares each quarter with the one before.
| Quarter | Shareholders | Change | Shares | Change |
|---|---|---|---|---|
| 2026Q3 | 168 | +18 | 23,435,296 | +3.2 % |
| 2026Q2 | 150 | -8 | 22,714,246 | -7.0 % |
| 2026Q1 | 158 | +2 | 24,427,629 | +32.8 % |
| 2025Q4 | 156 | -12 | 18,397,994 | -1.6 % |
| 2025Q3 | 168 | -15 | 18,701,537 | +2.6 % |
| 2025Q2 | 183 | -11 | 18,226,297 | -3.1 % |
| 2025Q1 | 194 | -22 | 18,806,531 | -17.8 % |
| 2024Q4 | 216 | +17 | 22,886,950 | +1.2 % |
| 2024Q3 | 199 | +26 | 22,604,852 | +4.0 % |
| 2024Q2 | 173 | +11 | 21,730,785 | +7.5 % |
| 2024Q1 | 162 | +17 | 20,208,917 | +19.4 % |
| 2023Q4 | 145 | 16,931,702 |
Institutional managers
160 managers declare this company to the SEC (Form 13F). The table shows the 25 largest.
| Manager | Shares | Value | |
|---|---|---|---|
| KIM, LLC | 12,280,426 | 42M $ | as of Mar 31, 2026 |
| OAKTOP CAPITAL MANAGEMENT II, L.P. | 5,168,674 | 17.7M $ | as of Mar 31, 2026 |
| BlackRock, Inc. | 4,743,076 | 16.2M $ | as of Mar 31, 2026 |
| NEEDHAM INVESTMENT MANAGEMENT LLC | 4,518,775 | 15.5M $ | as of Mar 31, 2026 |
| George Kaiser Family Foundation | 3,167,322 | 10.8M $ | as of Mar 31, 2026 |
| STATE STREET CORP | 2,320,727 | 7.9M $ | as of Mar 31, 2026 |
| Invesco Ltd. | 2,298,183 | 7.9M $ | as of Mar 31, 2026 |
| GAGNON SECURITIES LLC | 1,861,851 | 6.4M $ | as of Mar 31, 2026 |
| RICE HALL JAMES & ASSOCIATES, LLC | 1,552,628 | 5.3M $ | as of Mar 31, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | 1,540,771 | 5.3M $ | as of Mar 31, 2026 |
| AMERIPRISE FINANCIAL INC | 1,506,379 | 5.2M $ | as of Mar 31, 2026 |
| MILLENNIUM MANAGEMENT LLC | 1,404,675 | 4.8M $ | as of Mar 31, 2026 |
| MARSHALL WACE, LLP | 1,263,102 | 4.3M $ | as of Mar 31, 2026 |
| DIMENSIONAL FUND ADVISORS LP | 1,256,480 | 4.3M $ | as of Mar 31, 2026 |
| AMERICAN CENTURY COMPANIES INC | 1,247,783 | 4.3M $ | as of Mar 31, 2026 |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 1,218,779 | 4.2M $ | as of Mar 31, 2026 |
| Telemark Asset Management, LLC | 1,000,000 | 3.4M $ | as of Mar 31, 2026 |
| ROYCE & ASSOCIATES LP | 986,513 | 3.4M $ | as of Mar 31, 2026 |
| JPMORGAN CHASE & CO | 965,492 | 3.1M $ | as of Mar 31, 2026 |
| GOLDMAN SACHS GROUP INC | 899,513 | 3.1M $ | as of Mar 31, 2026 |
| HRT FINANCIAL LP | 870,435 | 3K $ | as of Mar 31, 2026 |
| D. E. Shaw & Co., Inc. | 833,572 | 2.9M $ | as of Mar 31, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | 697,932 | 2.4M $ | as of Mar 31, 2026 |
| Samjo Management, LLC | 645,625 | 2.2M $ | as of Mar 31, 2026 |
| CITADEL ADVISORS LLC | 581,187 | 2M $ | as of Mar 31, 2026 |
Declared shareholders of Aspen Aerogels Inc
There are 2 beneficial ownership filings. These stakes do not add up. An asset manager that files includes its own funds, which already appear among the funds on this page.
| Shareholder | Declared stake | Shares | |
|---|---|---|---|
| Needham Investment Management L.L.C. and 2 others | 3.90 % | 3,260,800 | as of Jun 30, 2026 · SCHEDULE 13G |
| Wood River Capital, LLC and 1 other | 0.00 % | 0 | as of Sep 23, 2026 · SCHEDULE 13D |
Cite this page
Titelia. "Fund shareholders of Aspen Aerogels Inc". https://titelia.com/en/stocks/aspen-aerogels-inc-US04523Y1055