ASPEN AEROGELS INC (ASPN): Ownership & Insider Activity
Hedge funds and institutional managers reporting a position in ASPN · Energy. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
14
13F filers
Aggregate Value
$43.6M
Across holders
Last Price
$5.63
2026-10-08
Sector
Energy
GICS
Quarterly fund activity7 increased7 reduced1 exited
Full exits: Brevan Howard Capital Management LP
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| AQR CAPITAL MANAGEMENT LLC CIK 0001167557 | Hedge Fund | 1.28M | $8.1M | 18.6% | 0.0% | Added | +$8.0M | Q2 2026 |
| MILLENNIUM MANAGEMENT LLC CIK 0001273087 | Hedge Fund | 1.19M | $7.5M | 17.3% | 0.0% | Reduced | $-1.4M | Q2 2026 |
| MARSHALL WACE, LLP CIK 0001318757 | Hedge Fund | 1.15M | $7.3M | 16.7% | 0.0% | Reduced | +$993K | Q2 2026 |
| SHAW D E & CO INC CIK 0001009207 | Hedge Fund | 1.07M | $6.8M | 15.5% | 0.0% | Added | +$1.5M | Q2 2026 |
| TWO SIGMA INVESTMENTS, LP CIK 0001179392 | Hedge Fund | 779K | $4.9M | 11.3% | 0.0% | Added | +$2.1M | Q2 2026 |
| TUDOR INVESTMENT CORP ET AL CIK 0000923093 | Hedge Fund | 567K | $3.6M | 8.3% | 0.0% | Added | +$2.6M | Q2 2026 |
| RENAISSANCE TECHNOLOGIES LLC CIK 0001037389 | Hedge Fund | 274K | $1.7M | 4.0% | 0.0% | Added | — | Q2 2026 |
| CITADEL ADVISORS LLC CIK 0001423053 | Hedge Fund | 239K | $1.5M | 3.5% | 0.0% | Reduced | +$1.0M | Q2 2026 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP CIK 0001164508 | Hedge Fund | 171K | $1.1M | 2.5% | 0.0% | Added | — | Q2 2026 |
| Man Group plc CIK 0001637460 | Hedge Fund | 90K | $572K | 1.3% | 0.0% | Reduced | $-336K | Q2 2026 |
Added
Hedge Fund
$8.1M· 18.6% of total· 0.0% port· 1.28M sh· +$8.0M QoQ· Q2 2026
Reduced
Hedge Fund
$7.5M· 17.3% of total· 0.0% port· 1.19M sh· $-1.4M QoQ· Q2 2026
Reduced
Hedge Fund
$7.3M· 16.7% of total· 0.0% port· 1.15M sh· +$993K QoQ· Q2 2026
Added
Hedge Fund
$6.8M· 15.5% of total· 0.0% port· 1.07M sh· +$1.5M QoQ· Q2 2026
Added
Hedge Fund
$4.9M· 11.3% of total· 0.0% port· 779K sh· +$2.1M QoQ· Q2 2026
Added
Hedge Fund
$3.6M· 8.3% of total· 0.0% port· 567K sh· +$2.6M QoQ· Q2 2026
Added
Hedge Fund
$1.7M· 4.0% of total· 0.0% port· 274K sh· — QoQ· Q2 2026
Reduced
Hedge Fund
$1.5M· 3.5% of total· 0.0% port· 239K sh· +$1.0M QoQ· Q2 2026
Added
Hedge Fund
$1.1M· 2.5% of total· 0.0% port· 171K sh· — QoQ· Q2 2026
Reduced
Hedge Fund
$572K· 1.3% of total· 0.0% port· 90K sh· $-336K QoQ· Q2 2026
Reduced
Hedge Fund
$277K· 0.6% of total· 0.0% port· 44K sh· $-670K QoQ· Q2 2026
Reduced
Hedge Fund
$104K· 0.2% of total· 0.0% port· 16K sh· $-274K QoQ· Q2 2026
Reduced
Hedge Fund
$57K· 0.1% of total· 0.0% port· 9K sh· $-1.6M QoQ· Q2 2026
Added
Hedge Fund
$10K· 0.0% of total· 0.0% port· 2K sh· +$8K QoQ· Q2 2026
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