Ticker · CUSIP 04523Y105
Holders (tracked)
10
Combined shares
4,107,111
Combined value
$11.62M
Last close
$3.48
Quarter
2025Q4
Price · 1Y$3.48-1.73 (-33.21%)H $8.82 · L $2.57 · Avg Vol 2.0M
Tracked holders · last 8 quarters
-1 vs previous quarter over the last 8.
Price is +23.0% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
18 events
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−248,372 shares · 2025Q4Position
- D.E. Shaw & Co. added2026-02-17+9,995 shares · 2025Q4Position
- Two Sigma Investments trimmed2026-02-17−54,109 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−576,566 shares · 2025Q4Position
- Steve Cohen (Point72) exited2026-02-17−184,300 shares · 2025Q4Position
- T. Rowe Price added2026-02-17+21,673 shares · 2025Q4Position
- +79,171 shares · 2025Q4Position
- AQR Capital Management added2026-02-17+192,144 shares · 2025Q4Position
- Renaissance Technologies exited2026-02-12−246,900 shares · 2025Q4Position
- First Eagle Investment Management added2026-02-04+105,164 shares · 2025Q4Position
- Steve Cohen (Point72) opened position2025-11-14+184,300 shares · 2025Q3Position
- T. Rowe Price added2025-11-14+5,749 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) added2025-11-14+540,772 shares · 2025Q3Position
- Two Sigma Investments added2025-11-14+40,221 shares · 2025Q3Position
- AQR Capital Management trimmed2025-11-14−12,026 shares · 2025Q3Position
- D.E. Shaw & Co. trimmed2025-11-14−7,500 shares · 2025Q3Position
- Renaissance Technologies trimmed2025-11-13−432,300 shares · 2025Q3Position
- +517,323 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of ASPN…
Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.
| Investor | First in | Cost basis | Return | Position value today |
|---|---|---|---|---|
| Paul Tudor Jones (Tudor Investment) | 2023Q1 | $3.42 | +1.9% | $276K |
| Ken Griffin (Citadel Advisors) | 2017Q1 | $3.67 | -5.1% | $608K |
| Ken Griffin (Citadel Advisors) | 2017Q1 | $3.67 | -5.1% | $608K |
| Ken Griffin (Citadel Advisors) | 2017Q1 | $3.67 | -5.1% | $608K |
| AQR Capital Management | 2020Q4 | $5.01 | -30.5% | $1.3M |
| First Eagle Investment Management | 2025Q3 | $6.26 | -44.4% | $2.2M |
| T. Rowe Price | 2016Q1 | $9.65 | -63.9% | $342K |
| Izzy Englander (Millennium Mgmt) | 2016Q4 | $10.19 | -65.8% | $3.0M |
| Two Sigma Investments | 2022Q1 | $10.40 | -66.5% | $2.6M |
| D.E. Shaw & Co. | 2021Q4 | $12.99 | -73.2% | $81K |
Who moved on this name in 2025Q4
Position changes 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 | $35.1M |
| 2022Q4 | 9 | $64.1M |
| 2023Q1 | 10 | $49.3M |
| 2023Q2 | 9 | $42.6M |
| 2023Q3 | 7 | $45.1M |
| 2023Q4 | 6 | $75.3M |
| 2024Q1 | 7 | $89.6M |
| 2024Q2 | 11 | $178.8M |
| 2024Q3 | 10 | $34.1M |
| 2024Q4 | 10 | $68.3M |
| 2025Q1 | 12 | $33.9M |
| 2025Q2 | 9 | $18.0M |
| 2025Q3 | 11 | $34.3M |
| 2025Q4 | 10 | $11.6M |
Who owns ASPN
10 super-investors · 2025Q4
Tracked stake
4.11M
shares
Combined value
$12M
% 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 | T. Rowe Price | 98.3K | $279K |
| 9 | Paul Tudor Jones Tudor Investment | 79.2K | $224K |
| 10 | D.E. Shaw & Co. | 23.2K | $66K |
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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