Ticker · CUSIP 68554V108
Holders (tracked)
9
Combined shares
5,683,275
Combined value
$13.31M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
SEC event timeline
14 events
- Ken Griffin (Citadel Advisors) added2026-02-17+121,728 shares · 2025Q413F
- D.E. Shaw & Co. trimmed2026-02-17−24,139 shares · 2025Q413F
- Two Sigma Investments exited2026-02-17−43,300 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−1,250,110 shares · 2025Q413F
- T. Rowe Price added2026-02-17+61,300 shares · 2025Q413F
- +186,901 shares · 2025Q413F
- AQR Capital Management trimmed2026-02-17−16,072 shares · 2025Q413F
- Renaissance Technologies trimmed2026-02-12−116,100 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) added2025-11-14+878,151 shares · 2025Q313F
- AQR Capital Management trimmed2025-11-14−119,733 shares · 2025Q313F
- Two Sigma Investments trimmed2025-11-14−7,600 shares · 2025Q313F
- T. Rowe Price added2025-11-14+4,677 shares · 2025Q313F
- D.E. Shaw & Co. added2025-11-14+34,405 shares · 2025Q313F
- Renaissance Technologies trimmed2025-11-13−15,200 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)+186,901$452K
Added to2
- Ken Griffin (Citadel Advisors)+121,728$295K
- T. Rowe Price+61,300$148
Trimmed4
- Izzy Englander (Millennium Mgmt)−1,250,110$3.0M
- Renaissance Technologies−116,100$281K
- D.E. Shaw & Co.−24,139$58K
- AQR Capital Management−16,072$39K
Exited1
- Two Sigma Investments−43,300$139K
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 9 | $103.7M |
| 2022Q2 | 12 | $48.7M |
| 2022Q3 | 12 | $72K |
| 2022Q4 | 12 | $72.3M |
| 2023Q1 | 11 | $91.6M |
| 2023Q2 | 12 | $75.4M |
| 2023Q3 | 12 | $84.8M |
| 2023Q4 | 10 | $113.7M |
| 2024Q1 | 12 | $86.0M |
| 2024Q2 | 11 | $61.0M |
| 2024Q3 | 9 | $28.7M |
| 2024Q4 | 10 | $32.0M |
| 2025Q1 | 11 | $26.5M |
| 2025Q2 | 8 | $17.5M |
| 2025Q3 | 8 | $21.3M |
| 2025Q4 | 9 | $13.3M |
Who owns OSUR
9 super-investors · 2025Q4
Tracked stake
5.68M
shares
Combined value
$13M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added3Trim4Held1
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Renaissance Technologies | 2.15M | $5M |
| 2 | D.E. Shaw & Co. | 1.67M | $4M |
| 3 | Izzy Englander Millennium Mgmt | 862.4K | $2M |
| 4 | Ken Griffin Citadel Advisors | 393.7K | $953K |
| 5 | AQR Capital Management | 221.9K | $537K |
| 6 | Paul Tudor Jones Tudor Investment | 186.9K | $452K |
| 7 | Jeremy Grantham GMO | 12.3K | $30K |
| 8 | Ken Griffin Citadel Advisors | 12.2K | $30K |
| 9 | T. Rowe Price | 183.3K | $444 |
Recent moves
20 transactions
- +121,728 · 2025Q4
- −43,300 · 2025Q4
- +61,300 · 2025Q4
- +186,901 · 2025Q4
- −1,250,110 · 2025Q4
- TRIMD.E. Shaw & Co.−24,139 · 2025Q4
- −16,072 · 2025Q4
- −116,100 · 2025Q4
- −119,733 · 2025Q3
- −7,600 · 2025Q3
- +878,151 · 2025Q3
- +34,405 · 2025Q3
- +4,677 · 2025Q3
- −15,200 · 2025Q3
- TRIMD.E. Shaw & Co.−84,147 · 2025Q2
- −104,309 · 2025Q2
- +28,801 · 2025Q2
- +2,177 · 2025Q2
- +10,225 · 2025Q2
- −684,137 · 2025Q2
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