Ticker · CUSIP 86889P208
Holders (tracked)
4
Combined shares
780,347
Combined value
$17.64M
Last close
$31.56
Quarter
2025Q4
Price · 1Y$31.56+21.81 (+223.79%)H $32.02 · L $6.50 · Avg Vol 60K
Position opened
Tracked holders · last 8 quarters
Flat over the last 8 quarters.
Price is +39.6% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
5 events
- Ken Griffin (Citadel Advisors) added2026-02-17+865 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) added2026-02-17+611,497 shares · 2025Q4Position
- Renaissance Technologies added2026-02-12+7,900 shares · 2025Q4Position
- +109,769 shares · 2025Q3Position
- Renaissance Technologies added2025-11-13+100 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of SRZN…
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 |
|---|---|---|---|---|
| T. Rowe Price | 2024Q3 | $11.79 | +167.7% | $685K |
| Ken Griffin (Citadel Advisors) | 2024Q3 | $12.66 | +149.2% | $465K |
| Renaissance Technologies | 2023Q4 | $15.08 | +109.2% | $714K |
| Izzy Englander (Millennium Mgmt) | 2025Q3 | $21.12 | +49.4% | $22.8M |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions0
—
Added to3
- Izzy Englander (Millennium Mgmt)+611,497$13.8M
- Renaissance Technologies+7,900$179K
- Ken Griffin (Citadel Advisors)+865$20K
Trimmed0
—
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2023Q4 | 2 | $647K |
| 2024Q1 | 2 | $254K |
| 2024Q2 | 2 | $198K |
| 2024Q3 | 3 | $550K |
| 2024Q4 | 2 | $506K |
| 2025Q1 | 2 | $420K |
| 2025Q2 | 3 | $419K |
| 2025Q3 | 4 | $2.1M |
| 2025Q4 | 4 | $17.6M |
Who owns SRZN
4 super-investors · 2025Q4
Tracked stake
780.3K
shares
Combined value
$18M
% of shares outstanding
—
shares-out unknown
Quarter action mix
Added3Held1
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Izzy Englander Millennium Mgmt | 721.3K | $16M |
| 2 | Renaissance Technologies | 22.6K | $511K |
| 3 | T. Rowe Price | 21.7K | $491K |
| 4 | Ken Griffin Citadel Advisors | 14.7K | $333K |
Recent moves
16 transactions
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