ASPN Aspen Aerogels, Inc.
Aspen Aerogels, Inc. (ASPN) Institutional Ownership
What the institutions did with ASPN last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| KIM, LLC | 12.3M | 16.7% |
| BlackRock, Inc. | 5.3M | 7.2% |
| OAKTOP CAPITAL MANAGEMENT II, L.P. | 5.2M | 7.0% |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.5M | 4.8% |
| NEEDHAM INVESTMENT MANAGEMENT LLC | 3.3M | 4.4% |
| George Kaiser Family Foundation | 3.2M | 4.3% |
| STATE STREET CORP | 2.6M | 3.5% |
| AMERICAN CENTURY COMPANIES INC | 2.5M | 3.4% |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 2.1M | 2.8% |
| AMERIPRISE FINANCIAL INC | 1.8M | 2.5% |
| GEODE CAPITAL MANAGEMENT, LLC | 1.8M | 2.4% |
| RICE HALL JAMES & ASSOCIATES, LLC | 1.6M | 2.2% |
| Invesco Ltd. | 1.6M | 2.2% |
| GAGNON SECURITIES LLC | 1.5M | 2.1% |
| DIMENSIONAL FUND ADVISORS LP | 1.4M | 2.0% |
| GOLDMAN SACHS GROUP INC | 1.4M | 1.9% |
| ROYCE & ASSOCIATES LP | 1.3M | 1.8% |
| AQR CAPITAL MANAGEMENT LLC | 1.3M | 1.7% |
| MILLENNIUM MANAGEMENT LLC | 1.2M | 1.6% |
| MARSHALL WACE, LLP | 1.1M | 1.6% |
| D. E. Shaw & Co., Inc. | 1.1M | 1.5% |
| JPMORGAN CHASE & CO | 1.0M | 1.4% |
| Telemark Asset Management, LLC | 1.0M | 1.4% |
| BNP PARIBAS FINANCIAL MARKETS | 867.2K | 1.2% |
| TWO SIGMA INVESTMENTS, LP | 779.5K | 1.1% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| AMERICAN CENTURY COMPANIES INC | Increased | 1.2M | 2.5M | +1.3M |
| NEEDHAM INVESTMENT MANAGEMENT LLC | Reduced | 4.5M | 3.3M | -1.3M |
| HRT FINANCIAL LP | Sold Out | 870.4K | 0 | -870.4K |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Increased | 1.2M | 2.1M | +839.3K |
| AQR CAPITAL MANAGEMENT LLC | Increased | 526.1K | 1.3M | +750.2K |
| ACADIAN ASSET MANAGEMENT LLC | New | 0 | 684.9K | +684.9K |
| Invesco Ltd. | Reduced | 2.3M | 1.6M | -678.2K |
| Samjo Management, LLC | Sold Out | 645.6K | 0 | -645.6K |
| BlackRock, Inc. | Increased | 4.7M | 5.3M | +534.1K |
| GOLDMAN SACHS GROUP INC | Increased | 899.5K | 1.4M | +472.8K |
| TUDOR INVESTMENT CORP ET AL | Increased | 151.1K | 567.4K | +416.3K |
| PANAGORA ASSET MANAGEMENT INC | Increased | 27.9K | 442.4K | +414.5K |
| Baird Financial Group, Inc. | New | 0 | 345.2K | +345.2K |
| CITADEL ADVISORS LLC | Reduced | 581.2K | 238.7K | -342.5K |
| TWO SIGMA INVESTMENTS, LP | Increased | 441.4K | 779.5K | +338.0K |
| ROYCE & ASSOCIATES LP | Increased | 986.5K | 1.3M | +336.7K |
| GAGNON SECURITIES LLC | Reduced | 1.9M | 1.5M | -326.0K |
| AMERIPRISE FINANCIAL INC | Increased | 1.5M | 1.8M | +314.9K |
| Trexquant Investment LP | New | 0 | 302.4K | +302.4K |
| RENAISSANCE TECHNOLOGIES LLC | New | 0 | 274.4K | +274.4K |
| Palogic Value Management, L.P. | Reduced | 450.0K | 185.6K | -264.4K |
| Point72 Asset Management, L.P. | Reduced | 256.6K | 9.0K | -247.6K |
| STATE STREET CORP | Increased | 2.3M | 2.6M | +238.8K |
| D. E. Shaw & Co., Inc. | Increased | 833.6K | 1.1M | +232.9K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 1.5M | 1.8M | +229.7K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.