Who owns ASPEN AEROGELS INC?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of ASPN from SEC Form 13F filings across 179 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 179 institutions disclosed 73.4M shares of ASPEN AEROGELS INC worth $464.9M — about 88.6% of shares outstanding; the largest disclosed holder is KIM, LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
179
13F holders
$464.9M
value, 2026 filers
88.6%
of shares outstanding (73.4M sh)
39
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of ASPN's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | KIM, LLC | 12.3M | $77.9M | 7.8% | 14.8% | 0.0% |
| 2 | BlackRock, Inc. | 5.3M | $33.5M | 0.0% | 6.4% | +11.3% |
| 3 | OAKTOP CAPITAL MANAGEMENT II, L.P. | 5.2M | $32.8M | 1.4% | 6.2% | 0.0% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 3.5M | $22.4M | 0.0% | 4.3% | +3.0% |
| 5 | NEEDHAM INVESTMENT MANAGEMENT LLC | 3.3M | $20.7M | 0.6% | 3.9% | -27.8% |
| 6 | George Kaiser Family Foundation | 3.2M | $20.1M | 1.9% | 3.8% | 0.0% |
| 7 | STATE STREET CORP | 2.6M | $16.2M | 0.0% | 3.1% | +10.3% |
| 8 | AMERICAN CENTURY COMPANIES INC | 2.5M | $15.9M | 0.0% | 3% | +101.2% |
| 9 | JACOBS LEVY EQUITY MANAGEMENT, INC | 2.1M | $13.0M | 0.0% | 2.5% | +68.9% |
| 10 | AMERIPRISE FINANCIAL INC | 1.8M | $11.5M | 0.0% | 2.2% | +20.9% |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | 1.8M | $11.2M | 0.0% | 2.1% | +14.9% |
| 12 | RICE HALL JAMES & ASSOCIATES, LLC | 1.6M | $10.4M | 0.5% | 2% | +5.3% |
| 13 | Invesco Ltd. | 1.6M | $10.3M | 0.0% | 2% | -29.5% |
| 14 | GAGNON SECURITIES LLC | 1.5M | $9.7M | 1.9% | 1.9% | -17.5% |
| 15 | DIMENSIONAL FUND ADVISORS LP | 1.4M | $9.2M | 0.0% | 1.7% | +15.2% |
| 16 | GOLDMAN SACHS GROUP INC | 1.4M | $8.7M | 0.0% | 1.7% | +52.6% |
| 17 | ROYCE & ASSOCIATES LP | 1.3M | $8.4M | 0.1% | 1.6% | +34.1% |
| 18 | AQR CAPITAL MANAGEMENT LLC | 1.3M | $8.1M | 0.0% | 1.5% | +142.6% |
| 19 | MILLENNIUM MANAGEMENT LLC | 1.2M | $7.5M | 0.0% | 1.4% | -15.2% |
| 20 | MARSHALL WACE, LLP | 1.1M | $7.3M | 0.0% | 1.4% | -9.2% |
| 21 | D. E. Shaw & Co., Inc. | 1.1M | $6.8M | 0.0% | 1.3% | +27.9% |
| 22 | JPMORGAN CHASE & CO | 1.0M | $6.0M | 0.0% | 1.2% | +4.0% |
| 23 | Telemark Asset Management, LLC | 1.0M | $6.3M | 0.5% | 1.2% | 0.0% |
| 24 | BNP PARIBAS FINANCIAL MARKETS | 867,199 | $5.5M | 0.0% | 1% | +24.3% |
| 25 | TWO SIGMA INVESTMENTS, LP | 779,468 | $4.9M | 0.0% | 0.9% | +76.6% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.