Ticker · CUSIP 45254E107
Holders (tracked)
7
Combined shares
2,563,095
Combined value
$16.87M
Last close
$5.56
Quarter
2025Q4
Price · 1Y$5.56+4.29 (+337.80%)H $9.26 · L $1.10 · Avg Vol 1.4M
Position opened
Tracked holders · last 8 quarters
+2 vs previous quarter over the last 8.
Price is -15.5% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
9 events
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−852,685 shares · 2025Q4Position
- Two Sigma Investments added2026-02-17+99,284 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−185,858 shares · 2025Q4Position
- T. Rowe Price added2026-02-17+195,176 shares · 2025Q4Position
- Renaissance Technologies added2026-02-12+117,300 shares · 2025Q4Position
- T. Rowe Price opened position2025-11-14+1,798,782 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) added2025-11-14+174,532 shares · 2025Q3Position
- Two Sigma Investments added2025-11-14+89,318 shares · 2025Q3Position
- Renaissance Technologies added2025-11-13+16,800 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of IMRX…
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 |
|---|---|---|---|---|
| Izzy Englander (Millennium Mgmt) | 2021Q3 | $5.86 | -5.1% | $283K |
| Renaissance Technologies | 2022Q1 | $6.04 | -7.9% | $847K |
| Two Sigma Investments | 2022Q1 | $6.33 | -12.2% | $1.2M |
| Ken Griffin (Citadel Advisors) | 2021Q4 | $8.11 | -31.4% | $287K |
| Ken Griffin (Citadel Advisors) | 2021Q4 | $8.11 | -31.4% | $287K |
| Ken Griffin (Citadel Advisors) | 2021Q4 | $8.11 | -31.4% | $287K |
| T. Rowe Price | 2021Q3 | $11.54 | -51.8% | $11.1M |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions0
—
Added to3
- Renaissance Technologies+117,300$772K
- Two Sigma Investments+99,284$653K
- T. Rowe Price+195,176$1K
Trimmed2
- Ken Griffin (Citadel Advisors)−852,685$5.6M
- Izzy Englander (Millennium Mgmt)−185,858$1.2M
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 7 | $52.1M |
| 2022Q2 | 6 | $42.6M |
| 2022Q3 | 4 | $104.3M |
| 2022Q4 | 4 | $34.6M |
| 2023Q1 | 4 | $68.0M |
| 2023Q2 | 3 | $81.9M |
| 2023Q3 | 3 | $62.3M |
| 2023Q4 | 4 | $55.6M |
| 2024Q1 | 4 | $12.2M |
| 2024Q2 | 6 | $6.1M |
| 2024Q3 | 3 | $2.7M |
| 2024Q4 | 3 | $2.0M |
| 2025Q1 | 3 | $1.1M |
| 2025Q2 | 3 | $334K |
| 2025Q3 | 5 | $21.9M |
| 2025Q4 | 7 | $16.9M |
Who owns IMRX
7 super-investors · 2025Q4
Tracked stake
2.56M
shares
Combined value
$17M
% of shares outstanding
—
shares-out unknown
Quarter action mix
Added3Trim4
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | T. Rowe Price | 1.99M | $13M |
| 2 | Two Sigma Investments | 207.2K | $1M |
| 3 | Renaissance Technologies | 152.3K | $1M |
| 4 | Ken Griffin Citadel Advisors | 90.5K | $595K |
| 5 | Ken Griffin Citadel Advisors | 51.7K | $340K |
| 6 | Izzy Englander Millennium Mgmt | 50.9K | $335K |
| 7 | Ken Griffin Citadel Advisors | 16.6K | $109K |
Recent moves
20 transactions
- −185,858 · 2025Q4
- +99,284 · 2025Q4
- +195,176 · 2025Q4
- −852,685 · 2025Q4
- +117,300 · 2025Q4
- +89,318 · 2025Q3
- +174,532 · 2025Q3
- +1,798,782 · 2025Q3
- +16,800 · 2025Q3
- SOLDT. Rowe Price−659,009 · 2025Q2
- +39,184 · 2025Q2
- −17,204 · 2025Q2
- +18,200 · 2025Q2
- −79,871 · 2025Q1
- −14,800 · 2025Q1
- TRIMT. Rowe Price−108,115 · 2025Q1
- TRIMT. Rowe Price−43,003 · 2024Q4
- −143,334 · 2024Q4
- +10,126 · 2024Q4
- −706,956 · 2024Q3
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