Funds holding Aspen Aerogels Inc
151 funds declare a position · 35 ETFs and 116 other funds · 78.4M $· 59K € · US04523Y1055
Each line carries its report date.
| Rank | Fund | Shares | Value | Weight | |
|---|---|---|---|---|---|
| 1 | Needham Aggressive Growth Fund Needham Funds Inc | 2,835,000 | 9.7M $ | 0.62 % | as of Mar 31, 2026 · Original filing |
| 2 | VANGUARD TOTAL STOCK MARKET INDEX FUND VANGUARD INDEX FUNDS | 2,565,612 | 8.8M $ | 0.00 % | as of Mar 31, 2026 · Original filing |
| 3 | Invesco WilderHill Clean Energy ETF Invesco Exchange-Traded Fund Trust | 1,702,981 | 6.3M $ | 1.40 % | as of Apr 30, 2026 · Original filing |
| 4 | iShares Russell 2000 ETF iShares Trust | 1,647,627 | 5.6M $ | 0.01 % | as of Mar 31, 2026 · Original filing |
| 5 | Columbia Small Cap Value Discovery Fund COLUMBIA FUNDS SERIES TRUST I | 1,034,870 | 3.8M $ | 0.17 % | as of Apr 30, 2026 · Original filing |
| 6 | Needham Small Cap Growth Fund Needham Funds Inc | 972,500 | 3.3M $ | 1.92 % | as of Mar 31, 2026 · Original filing |
| 7 | Avantis U.S. Small Cap Value ETF American Century ETF Trust | 930,666 | 2.9M $ | 0.01 % | as of Feb 28, 2026 · Original filing |
| 8 | State Street(R) SPDR(R) S&P Kensho New Economies Composite ETF SPDR SERIES TRUST | 875,428 | 3M $ | 0.13 % | as of Mar 31, 2026 · Original filing |
| 9 | VANGUARD EXTENDED MARKET INDEX FUND VANGUARD INDEX FUNDS | 776,529 | 2.7M $ | 0.00 % | as of Mar 31, 2026 · Original filing |
| 10 | Fidelity Small Cap Index Fund Fidelity Salem Street Trust | 655,432 | 2.4M $ | 0.01 % | as of Apr 30, 2026 · Original filing |
| 11 | iShares Russell 2000 Value ETF iShares Trust | 573,580 | 2M $ | 0.02 % | as of Mar 31, 2026 · Original filing |
| 12 | Royce Small-Cap Opportunity Fund ROYCE FUND | 507,805 | 1.7M $ | 0.15 % | as of Mar 31, 2026 · Original filing |
| 13 | Federated Hermes MDT Small Cap Core Fund Federated Hermes MDT Series | 442,391 | 1.6M $ | 0.09 % | as of Apr 30, 2026 · Original filing |
| 14 | Needham Growth Fund Needham Funds Inc | 424,075 | 1.5M $ | 0.78 % | as of Mar 31, 2026 · Original filing |
| 15 | Schwab U.S. Small-Cap ETF SCHWAB STRATEGIC TRUST | 336,598 | 1.1M $ | 0.01 % | as of Feb 28, 2026 · Original filing |
| 16 | Clearwater Select Equity Fund Clearwater Investment Trust | 334,930 | 1.1M $ | 0.26 % | as of Mar 31, 2026 · Original filing |
| 17 | Dimensional U.S. Targeted Value ETF Dimensional ETF Trust | 327,463 | 1.2M $ | 0.01 % | as of Apr 30, 2026 · Original filing |
| 18 | VANGUARD RUSSELL 2000 INDEX FUND VANGUARD SCOTTSDALE FUNDS | 327,452 | 1M $ | 0.01 % | as of Feb 28, 2026 · Original filing |
| 19 | Dimensional U.S. Small Cap ETF Dimensional ETF Trust | 258,221 | 958K $ | 0.01 % | as of Apr 30, 2026 · Original filing |
| 20 | Fidelity Extended Market Index Fund Fidelity Concord Street Trust | 239,411 | 747K $ | 0.00 % | as of Feb 28, 2026 · Original filing |
| 21 | Invesco RAFI US 1500 Small-Mid ETF Invesco Exchange-Traded Fund Trust | 214,545 | 796K $ | 0.03 % | as of Apr 30, 2026 · Original filing |
| 22 | Dimensional US Small Cap Value ETF Dimensional ETF Trust | 214,441 | 795.6K $ | 0.01 % | as of Apr 30, 2026 · Original filing |
| 23 | Columbia Variable Portfolio - Small Cap Value Fund COLUMBIA FUNDS VARIABLE INSURANCE TRUST | 206,330 | 705.6K $ | 0.18 % | as of Mar 31, 2026 · Original filing |
| 24 | DWS Global Small Cap Fund DEUTSCHE DWS GLOBAL/INTERNATIONAL FUND, INC. | 203,749 | 755.9K $ | 0.38 % | as of Apr 30, 2026 · Original filing |
| 25 | VANGUARD MATERIALS INDEX FUND VANGUARD WORLD FUND | 201,706 | 629.3K $ | 0.01 % | as of Feb 28, 2026 · Original filing |
| 26 | First Trust NASDAQ Clean Edge Green Energy Index Fund First Trust Exchange-Traded Fund | 174,625 | 597.2K $ | 0.11 % | as of Mar 31, 2026 · Original filing |
| 27 | Inspire Small/Mid Cap ETF Northern Lights Fund Trust IV | 172,326 | 537.7K $ | 0.21 % | as of Feb 28, 2026 · Original filing |
| 28 | iShares Micro-Cap ETF iShares Trust | 166,914 | 570.8K $ | 0.05 % | as of Mar 31, 2026 · Original filing |
| 29 | Schwab Small-Cap Index Fund SCHWAB CAPITAL TRUST | 145,952 | 541.5K $ | 0.01 % | as of Apr 30, 2026 · Original filing |
| 30 | Avantis U.S. Small Cap Value Fund American Century ETF Trust | 126,817 | 395.7K $ | 0.03 % | as of Feb 28, 2026 · Original filing |
| 31 | ALPS Clean Energy ETF ALPS ETF TRUST | 121,640 | 379.5K $ | 0.34 % | as of Feb 28, 2026 · Original filing |
| 32 | Fidelity Total Market Index Fund Fidelity Concord Street Trust | 121,420 | 378.8K $ | 0.00 % | as of Feb 28, 2026 · Original filing |
| 33 | NORTH SQUARE DYNAMIC SMALL CAP FUND Exchange Place Advisors Trust | 112,870 | 352.2K $ | 0.05 % | as of Feb 28, 2026 · Original filing |
| 34 | Master Small Cap Index Series Quantitative Master Series LLC | 106,295 | 363.5K $ | 0.01 % | as of Mar 31, 2026 · Original filing |
| 35 | Fidelity Series Total Market Index Fund Fidelity Concord Street Trust | 99,199 | 309.5K $ | 0.00 % | as of Feb 28, 2026 · Original filing |
| 36 | Firsthand Technology Opportunities Fund Firsthand Funds | 90,000 | 307.8K $ | 0.75 % | as of Mar 31, 2026 · Original filing |
| 37 | SMALL CAP EQUITY FUND GuideStone Funds | 85,837 | 293.6K $ | 0.04 % | as of Mar 31, 2026 · Original filing |
| 38 | Fidelity Small Cap Value Index Fund Fidelity Salem Street Trust | 82,474 | 282.1K $ | 0.02 % | as of Mar 31, 2026 · Original filing |
| 39 | DWS Global Small Cap VIP DEUTSCHE DWS VARIABLE SERIES I | 81,362 | 278.3K $ | 0.40 % | as of Mar 31, 2026 · Original filing |
| 40 | iShares Core S&P Total U.S. Stock Market ETF iShares Trust | 79,595 | 272.2K $ | 0.00 % | as of Mar 31, 2026 · Original filing |
| 41 | VANGUARD U.S. VALUE FACTOR ETF VANGUARD WELLINGTON FUND | 79,494 | 248K $ | 0.03 % | as of Feb 28, 2026 · Original filing |
| 42 | Nuveen Small Cap Blend Index Fund TIAA-CREF Funds | 79,148 | 293.6K $ | 0.01 % | as of Apr 30, 2026 · Original filing |
| 43 | State Street(R) SPDR(R) S&P Kensho Smart Mobility ETF SPDR SERIES TRUST | 77,835 | 266.2K $ | 1.55 % | as of Mar 31, 2026 · Original filing |
| 44 | EQ/2000 Managed Volatility Portfolio EQ Advisors Trust | 77,003 | 263.4K $ | 0.01 % | as of Mar 31, 2026 · Original filing |
| 45 | Ultra-Small Company Market Fund Bridgeway Funds, Inc. | 75,000 | 256.5K $ | 0.21 % | as of Mar 31, 2026 · Original filing |
| 46 | NVIT Multi-Manager Small Company Fund Nationwide Variable Insurance Trust | 74,300 | 254.1K $ | 0.07 % | as of Mar 31, 2026 · Original filing |
| 47 | NVIT Small Cap Value Fund Nationwide Variable Insurance Trust | 73,239 | 250.5K $ | 0.13 % | as of Mar 31, 2026 · Original filing |
| 48 | Federated Hermes MDT Small Cap Value Fund f/k/a Federated Hermes Clover Small Value Fund Federated Hermes Equity Funds | 67,720 | 231.6K $ | 0.15 % | as of Mar 31, 2026 · Original filing |
| 49 | U.S. SMALL CAP PORTFOLIO DFA INVESTMENT DIMENSIONS GROUP INC | 66,937 | 248.3K $ | 0.00 % | as of Apr 30, 2026 · Original filing |
| 50 | U.S. SMALL CAP VALUE PORTFOLIO DFA INVESTMENT DIMENSIONS GROUP INC | 63,700 | 236.3K $ | 0.00 % | as of Apr 30, 2026 · Original filing |
| 51 | Avantis U.S. Small Cap Equity ETF American Century ETF Trust | 60,423 | 188.5K $ | 0.01 % | as of Feb 28, 2026 · Original filing |
| 52 | Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF Goldman Sachs ETF Trust | 56,117 | 175.1K $ | 0.02 % | as of Feb 28, 2026 · Original filing |
| 53 | VANGUARD U.S. QUALITY FACTOR ETF VANGUARD WELLINGTON FUND | 53,148 | 165.8K $ | 0.04 % | as of Feb 28, 2026 · Original filing |
| 54 | VANGUARD BALANCED INDEX FUND VANGUARD VALLEY FORGE FUNDS | 52,096 | 178.2K $ | 0.00 % | as of Mar 31, 2026 · Original filing |
| 55 | VANGUARD RUSSELL 2000 VALUE INDEX FUND VANGUARD SCOTTSDALE FUNDS | 48,496 | 151.3K $ | 0.01 % | as of Feb 28, 2026 · Original filing |
| 56 | LVIP SSGA Small-Cap Index Fund LINCOLN VARIABLE INSURANCE PRODUCTS TRUST | 47,300 | 161.8K $ | 0.01 % | as of Mar 31, 2026 · Original filing |
| 57 | Nuveen Equity Index Fund TIAA-CREF Funds | 47,296 | 175.5K $ | 0.00 % | as of Apr 30, 2026 · Original filing |
| 58 | U.S. MICRO CAP PORTFOLIO DFA INVESTMENT DIMENSIONS GROUP INC | 43,796 | 162.5K $ | 0.00 % | as of Apr 30, 2026 · Original filing |
| 59 | EQ/Small Company Index Portfolio EQ Advisors Trust | 43,450 | 148.6K $ | 0.01 % | as of Mar 31, 2026 · Original filing |
| 60 | VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND VANGUARD INSTITUTIONAL INDEX FUNDS | 41,919 | 143.4K $ | 0.00 % | as of Mar 31, 2026 · Original filing |
| 61 | Federated Hermes MDT Small Cap Core ETF Federated Hermes ETF Trust | 41,266 | 128.7K $ | 0.08 % | as of Feb 28, 2026 · Original filing |
| 62 | Schwab U.S. Broad Market ETF SCHWAB STRATEGIC TRUST | 38,440 | 119.9K $ | 0.00 % | as of Feb 28, 2026 · Original filing |
| 63 | Small-Cap Value Portfolio PACIFIC SELECT FUND | 36,277 | 124.1K $ | 0.03 % | as of Mar 31, 2026 · Original filing |
| 64 | Firsthand Alternative Energy Fund Firsthand Funds | 35,000 | 119.7K $ | 1.10 % | as of Mar 31, 2026 · Original filing |
| 65 | Fidelity ZERO Total Market Index Fund Fidelity Concord Street Trust | 34,268 | 127.1K $ | 0.00 % | as of Apr 30, 2026 · Original filing |
| 66 | Schwab Total Stock Market Index Fund SCHWAB CAPITAL TRUST | 34,000 | 126.1K $ | 0.00 % | as of Apr 30, 2026 · Original filing |
| 67 | Franklin Small Cap Enhanced ETF Franklin Templeton ETF Trust | 32,214 | 110.2K $ | 0.10 % | as of Mar 31, 2026 · Original filing |
| 68 | Venerable US Small Cap Fund Venerable Variable Insurance Trust | 30,823 | 105.4K $ | 0.08 % | as of Mar 31, 2026 · Original filing |
| 69 | U.S. Small Cap Equity Fund RUSSELL INVESTMENT CO | 30,550 | 113.3K $ | 0.01 % | as of Apr 30, 2026 · Original filing |
| 70 | Bridge Builder Small/Mid Cap Value Fund Bridge Builder Trust | 29,336 | 100.3K $ | 0.00 % | as of Mar 31, 2026 · Original filing |
| 71 | Global X Russell 2000 ETF GLOBAL X FUNDS | 28,723 | 106.6K $ | 0.01 % | as of Apr 30, 2026 · Original filing |
| 72 | Small Cap Index Fund Northern Funds | 26,973 | 92.2K $ | 0.01 % | as of Mar 31, 2026 · Original filing |
| 73 | Small Cap Index Fund VALIC Co I | 25,594 | 79.9K $ | 0.01 % | as of Feb 28, 2026 · Original filing |
| 74 | Fidelity ZERO Extended Market Index Fund Fidelity Concord Street Trust | 24,455 | 90.7K $ | 0.00 % | as of Apr 30, 2026 · Original filing |
| 75 | STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO STATE STREET INSTITUTIONAL INVESTMENT TRUST | 21,600 | 73.9K $ | 0.00 % | as of Mar 31, 2026 · Original filing |
| 76 | Innovator U.S. Small Cap Managed Floor ETF Innovator ETFs Trust | 20,744 | 77K $ | 0.10 % | as of Apr 30, 2026 · Original filing |
| 77 | EQ/AB Small Cap Growth Portfolio EQ Advisors Trust | 20,630 | 70.6K $ | 0.00 % | as of Mar 31, 2026 · Original filing |
| 78 | Small-Cap Index Portfolio PACIFIC SELECT FUND | 18,523 | 63.3K $ | 0.01 % | as of Mar 31, 2026 · Original filing |
| 79 | T. Rowe Price Extended Equity Market Index Fund T. ROWE PRICE INDEX TRUST, INC. | 16,921 | 57.9K $ | 0.01 % | as of Mar 31, 2026 · Original filing |
| 80 | iShares Russell 3000 ETF iShares Trust | 15,932 | 54.5K $ | 0.00 % | as of Mar 31, 2026 · Original filing |
| 81 | ATM Small Cap Managed Volatility Portfolio EQ Advisors Trust | 15,391 | 52.6K $ | 0.01 % | as of Mar 31, 2026 · Original filing |
| 82 | iShares Energy Storage & Materials ETF iShares Trust | 14,087 | 52.3K $ | 0.08 % | as of Apr 30, 2026 · Original filing |
| 83 | NVIT Small Cap Index Fund Nationwide Variable Insurance Trust | 13,935 | 47.7K $ | 0.01 % | as of Mar 31, 2026 · Original filing |
| 84 | JNL/DFA U.S. Small Cap Fund JNL Series Trust | 13,498 | 46.2K $ | 0.01 % | as of Mar 31, 2026 · Original filing |
| 85 | Small Cap Index Trust John Hancock Variable Insurance Trust | 12,448 | 42.6K $ | 0.01 % | as of Mar 31, 2026 · Original filing |
| 86 | 1290 VT Micro Cap Portfolio EQ Advisors Trust | 11,902 | 40.7K $ | 0.02 % | as of Mar 31, 2026 · Original filing |
| 87 | Fidelity Flex Small Cap Index Fund Fidelity Salem Street Trust | 10,874 | 40.3K $ | 0.01 % | as of Apr 30, 2026 · Original filing |
| 88 | 1290 VT Small Cap Value Portfolio EQ Advisors Trust | 10,622 | 36.3K $ | 0.01 % | as of Mar 31, 2026 · Original filing |
| 89 | iShares Russell Small/Mid-Cap Index Fund BlackRock Funds | 9,731 | 36.1K $ | 0.00 % | as of Apr 30, 2026 · Original filing |
| 90 | SIIT EXTENDED MARKET INDEX FUND SEI INSTITUTIONAL INVESTMENTS TRUST | 9,600 | 30K $ | 0.00 % | as of Feb 28, 2026 · Original filing |
| 91 | DWS Small Cap Index VIP DEUTSCHE DWS INVESTMENTS VIT FUNDS | 9,132 | 31.2K $ | 0.01 % | as of Mar 31, 2026 · Original filing |
| 92 | Avantis U.S. Equity ETF American Century ETF Trust | 9,004 | 28.1K $ | 0.00 % | as of Feb 28, 2026 · Original filing |
| 93 | BlackRock Small Cap Index V.I. Fund BlackRock Variable Series Funds, Inc. | 8,944 | 30.6K $ | 0.01 % | as of Mar 31, 2026 · Original filing |
| 94 | AST Small-Cap Equity Portfolio Advanced Series Trust | 8,917 | 30.5K $ | 0.00 % | as of Mar 31, 2026 · Original filing |
| 95 | MetLife Russell 2000 Index Portfolio Brighthouse Funds Trust II | 8,722 | 29.8K $ | 0.00 % | as of Mar 31, 2026 · Original filing |
| 96 | Dimensional VA U.S. Targeted Value Portfolio DFA INVESTMENT DIMENSIONS GROUP INC | 8,603 | 31.9K $ | 0.00 % | as of Apr 30, 2026 · Original filing |
| 97 | T. Rowe Price Small-Cap Index Fund T. ROWE PRICE INDEX TRUST, INC. | 8,359 | 28.6K $ | 0.01 % | as of Mar 31, 2026 · Original filing |
| 98 | Column Small Cap Fund Trust for Professional Managers | 8,042 | 25.1K $ | 0.00 % | as of Feb 28, 2026 · Original filing |
| 99 | SA Small Cap Index Portfolio SUNAMERICA SERIES TRUST | 7,969 | 29.6K $ | 0.01 % | as of Apr 30, 2026 · Original filing |
| 100 | Victory Extended Market Index Fund Victory Portfolios III | 7,902 | 29.3K $ | 0.00 % | as of Apr 30, 2026 · Original filing |
Institutional managers
160 managers declare this company to the SEC (Form 13F). These positions are not counted in the totals above: a manager and its own funds file separately.
| 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 |
| GOLDMAN SACHS GROUP INC | 899,513 | 3.1M $ | as of Mar 31, 2026 |
| JPMORGAN CHASE & CO | 965,492 | 3.1M $ | 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 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 556,725 | 1.9M $ | as of Mar 31, 2026 |