Ticker · CUSIP 04523Y105
Holders (tracked)
10
Combined shares
4,107,111
Combined value
$11.35M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
-1 vs previous quarter over the last 8.
SEC event timeline
18 events
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−248,372 shares · 2025Q413F
- D.E. Shaw & Co. added2026-02-17+9,995 shares · 2025Q413F
- Two Sigma Investments trimmed2026-02-17−54,109 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−576,566 shares · 2025Q413F
- Steve Cohen (Point72) exited2026-02-17−184,300 shares · 2025Q413F
- T. Rowe Price added2026-02-17+21,673 shares · 2025Q413F
- +79,171 shares · 2025Q413F
- AQR Capital Management added2026-02-17+192,144 shares · 2025Q413F
- Renaissance Technologies exited2026-02-12−246,900 shares · 2025Q413F
- First Eagle Investment Management added2026-02-04+105,164 shares · 2025Q413F
- Steve Cohen (Point72) opened position2025-11-14+184,300 shares · 2025Q313F
- T. Rowe Price added2025-11-14+5,749 shares · 2025Q313F
- Izzy Englander (Millennium Mgmt) added2025-11-14+540,772 shares · 2025Q313F
- Two Sigma Investments added2025-11-14+40,221 shares · 2025Q313F
- AQR Capital Management trimmed2025-11-14−12,026 shares · 2025Q313F
- D.E. Shaw & Co. trimmed2025-11-14−7,500 shares · 2025Q313F
- Renaissance Technologies trimmed2025-11-13−432,300 shares · 2025Q313F
- +517,323 shares · 2025Q313F
Insider activity
No insider transactions in the last 30 days.
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions1
- Paul Tudor Jones (Tudor Investment)+79,171$224K
Added to4
- AQR Capital Management+192,144$544K
- First Eagle Investment Management+105,164$298K
- D.E. Shaw & Co.+9,995$28K
- T. Rowe Price+21,673$62
Trimmed3
- Izzy Englander (Millennium Mgmt)−576,566$1.6M
- Ken Griffin (Citadel Advisors)−248,372$703K
- Two Sigma Investments−54,109$153K
Exited2
- Renaissance Technologies−246,900$1.7M
- Steve Cohen (Point72)−184,300$1.3M
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 9 | $95.7M |
| 2022Q2 | 10 | $31.5M |
| 2022Q3 | 9 | $35K |
| 2022Q4 | 9 | $50.4M |
| 2023Q1 | 10 | $38.3M |
| 2023Q2 | 9 | $40.7M |
| 2023Q3 | 7 | $45.0M |
| 2023Q4 | 6 | $75.1M |
| 2024Q1 | 7 | $89.3M |
| 2024Q2 | 11 | $178.3M |
| 2024Q3 | 10 | $33.2M |
| 2024Q4 | 10 | $67.8M |
| 2025Q1 | 12 | $33.5M |
| 2025Q2 | 9 | $17.6M |
| 2025Q3 | 11 | $33.7M |
| 2025Q4 | 10 | $11.3M |
Who owns ASPN
10 super-investors · 2025Q4
Tracked stake
4.11M
shares
Combined value
$11M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added4Trim5
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Izzy Englander Millennium Mgmt | 871.0K | $2M |
| 2 | Ken Griffin Citadel Advisors | 866.2K | $2M |
| 3 | Two Sigma Investments | 757.4K | $2M |
| 4 | First Eagle Investment Management | 622.5K | $2M |
| 5 | AQR Capital Management | 369.9K | $1M |
| 6 | Ken Griffin Citadel Advisors | 244.6K | $692K |
| 7 | Ken Griffin Citadel Advisors | 174.8K | $495K |
| 8 | Paul Tudor Jones Tudor Investment | 79.2K | $224K |
| 9 | D.E. Shaw & Co. | 23.2K | $66K |
| 10 | T. Rowe Price | 98.3K | $279 |
Recent moves
20 transactions
- +79,171 · 2025Q4
- +9,995 · 2025Q4
- −576,566 · 2025Q4
- −184,300 · 2025Q4
- −248,372 · 2025Q4
- +192,144 · 2025Q4
- +21,673 · 2025Q4
- −54,109 · 2025Q4
- −246,900 · 2025Q4
- +105,164 · 2025Q4
- +184,300 · 2025Q3
- −12,026 · 2025Q3
- TRIMD.E. Shaw & Co.−7,500 · 2025Q3
- +540,772 · 2025Q3
- +5,749 · 2025Q3
- +40,221 · 2025Q3
- −432,300 · 2025Q3
- +517,323 · 2025Q3
- TRIMD.E. Shaw & Co.−4,067 · 2025Q2
- −692,647 · 2025Q2
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