Monitor for any future conversion to Schedule 13D, which would signal activist intent. The 8.6% stake is large enough to be influential if the filer changes strategy, but the current passive designation suggests no near-term engagement.
Price Chart
Executive Summary
Orin Hirschman and affiliated entities (AIGH Capital Management LLC, AIGH Investment Partners LLC) disclosed a passive 8.6% stake in Aspen Aerogels Inc as of September 30, 2026, totaling 7,150,126 shares. This is a new Schedule 13G filing (not an amendment), indicating a significant passive position by a hedge fund manager. The stake is sizable but explicitly passive under Rule 13d-1(b), with no intent to influence control.
Key Financial Metrics
Key Facts
- Orin Hirschman and affiliates filed a new Schedule 13G disclosing beneficial ownership of 7,150,126 shares of Aspen Aerogels Inc common stock.
- The stake represents 8.6% of shares outstanding as of September 30, 2026.
- The filing is made under Rule 13d-1(b), confirming a passive investment intent with no control-related purpose.
- Reporting persons include AIGH Capital Management LLC (investment adviser), AIGH Investment Partners LLC, and Orin Hirschman individually.
Financial Impact
8.6% passive stake valued at approximately $[undisclosed] based on market price at filing date; no transaction amount stated.
Risk Factors
- Passive filer could later convert to activist (13D), potentially pressuring management.
- Large concentrated position could lead to selling pressure if the filer reduces stake.
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| SC 13G Filing (Primary) | 0001493152-26-047542 |
| Document: 0001493152-26-047542-index.html | 0001493152-26-047542 |
| Document: 0001493152-26-047542.txt | 0001493152-26-047542 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 22, 2026 4d ago | Press Release | $5.44 | awaiting T+1 | — | $5.52 (+1.47%) |
Oct 19, 2026 7d ago | SC 13G | $5.32 $5.33 | ▲ +0.19% | ▼ −0.15% | $5.52 (+3.76%) |
Sep 24, 2026 4w ago | SC 13D/A | $5.22 $5.17 | ▲ +0.96% | ▲ +0.21% | $5.52 (−5.75%) |
Sep 15, 2026 5w ago | 8-K | $4.86 $4.99 | ▲ +2.70% | ▲ +2.37% | $5.52 (+13.58%) |
Aug 15, 2026 10w ago | Institutional Cluster | $5.82 $5.58 | ▼ −4.12% | ▼ −3.45% | $5.52 (−5.15%) |
Apr 23, 2026 26w ago | Press Release | $3.36 $3.50 | ▲ +4.17% | ▲ +3.38% | $5.52 (+64.29%) |
Feb 25, 2026 34w ago | 8-K | $2.57 $3.14 | ▼ −22.18% | ▼ −22.72% | $5.52 (−114.79%) |
US Market Status
Subscribe to SecBot
Get Real-Time SEC Filing Intelligence
Comprehensive SEC filing analysis delivered the moment filings hit EDGAR. Sentiment scoring, impact analysis, and actionable insights for every material event.
Create a free account Live analysis, Telegram alerts, watchlists and the MCP server for subscribers