Companies / Aspen Aerogels Inc
Aspen Aerogels Inc
NYSE: ASPNCIK 1145986NORTHBOROUGH, MA
Financials · FY2025
Ownership
83.0M shares outstanding · as of Aug 4, 2026
Ownership
| Institutions | 89.92% | 74,623,642 |
| Public float | 10.08% | 8,365,142 |
% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.
Insiders 11
View all →| Insider | % of shares | Shares |
|---|---|---|
Young Donald RCEOFormerPresident and CEO · Director | 0.77% | 637,834 |
Whitaker Corby CFormerChief Commercial Officer | 0.25% | 205,315 |
Mitchell Steven RFormerDirector | 0.19% | 156,898 |
Noglows William PFormerDirector | 0.14% | 114,156 |
Landes GreggFormerChief Operating Officer | 0.12% | 102,931 |
Thoele Grant DouglasFormerCFO & Treasurer | 0.09% | 77,732 |
Deegan Glenn E.FormerCAO, GC & Corp Secretary | 0.08% | 67,176 |
Sweetnam James EFormerDirector | 0.04% | 36,321 |
Kool KathleenFormerDirector | 0.04% | 34,323 |
Robinson CariFormerDirector | 0.03% | 22,616 |
Institutional holders 189
View all →| Holder | Value | % of shares |
|---|---|---|
| $34.75M | 14.80% | |
| $33.46M | 6.36% | |
| $32.77M | 6.23% | |
| $16.23M | 3.08% | |
| $15.45M | 5.45% | |
| $13.26M | 5.65% | |
| $11.69M | 4.98% | |
| $10.83M | 3.82% | |
| $10.37M | 1.97% | |
| $6.37M | 2.24% |
Activity
Jun 30, 2026View all →
InsidersInstitutions
Who's accumulating and trimming this stock (13F).| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Q2 2026 as of | Oaktop Capital Management II, L.P. 13F manager | Add | Common stock | $4.91M | +774K +17.62% | 5,168,674 6.23% of shares | low |
| Q1 2026 as of | D. E. Shaw & Co., Inc. 13F manager | Add | Common stock | $2.77M | +810K +3490.35% | 833,572 1.00% of shares | low |
| Q1 2026 as of | Gagnon Securities LLC 13F manager | Add | Common stock | $2.49M | +729K +64.29% | 1,861,851 2.24% of shares | low |
| Q1 2026 as of | Marshall Wace, LLP 13F manager | Add | Common stock | $2.42M | +709K +127.92% | 1,263,102 1.52% of shares | low |
| Q2 2026 as of | BlackRock, Inc. 13F manager | Add | Common stock | $2.21M | +348K +7.06% | 5,277,148 6.36% of shares | low |
| Q3 2024 as of | Barclays PLC 13F manager | Add | Common stock | $1.97M | +71K +333.79% | 92,302 0.11% of shares | low |
| Q1 2026 as of | Millennium Management LLC 13F manager | Add | Common stock | $1.83M | +534K +61.28% | 1,404,675 1.69% of shares | low |
| Q1 2026 as of | First Eagle Investment Management, LLC 13F manager | Exit | Common stock | $-1.76M | -622K -100.00% | 0 | low |
5%+ ownership events
Schedule 13D / 13G
| Filer | Stance | % of class |
|---|---|---|
| Vanguard Group Inc | Passive13G/A | — |
| Needham Investment Management LLC | Passive13G | — |
Securities
via CUSIP / OpenFIGI
| Symbol | Type | CUSIP |
|---|---|---|
| ASPN | — | 04523Y105 |