Ticker · CUSIP 687604108
Holders (tracked)
8
Combined shares
4,890,574
Combined value
$128.57M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
Flat over the last 6 quarters.
SEC event timeline
17 events
- Goncalves Joana · Chief Medical Officer2026-04-15Sold $277.8K @ $65.73Insider sell
- Goncalves Joana · Chief Medical Officer2026-04-15Sold $151.3K @ $66.56Insider sell
- Goncalves Joana · Chief Medical Officer2026-04-15Sold $33.7K @ $67.38Insider sell
- +58,723 shares · 2025Q413F
- Steve Cohen (Point72) trimmed2026-02-17−437,002 shares · 2025Q413F
- Ken Griffin (Citadel Advisors) added2026-02-17+409,232 shares · 2025Q413F
- T. Rowe Price added2026-02-17+22,540 shares · 2025Q413F
- Wellington Management trimmed2026-02-17−6,378 shares · 2025Q413F
- D.E. Shaw & Co. trimmed2026-02-17−19,002 shares · 2025Q413F
- T. Rowe Price added2025-11-14+215,925 shares · 2025Q313F
- Wellington Management opened position2025-11-14+91,094 shares · 2025Q313F
- Izzy Englander (Millennium Mgmt) exited2025-11-14−12,326 shares · 2025Q313F
- Steve Cohen (Point72) added2025-11-14+707,002 shares · 2025Q313F
- Two Sigma Investments trimmed2025-11-14−3,776 shares · 2025Q313F
- D.E. Shaw & Co. added2025-11-14+27,772 shares · 2025Q313F
- +2,666,690 shares · 2025Q313F
- Renaissance Technologies exited2025-11-13−13,900 shares · 2025Q313F
Insider activity
Last 30 days
Net (open-market)
−$462.8K
Buys
0 · $0
Sells
3 · $462.8K
Unique insiders
1
| Date | Insider | Code | Shares | Price | Value |
|---|---|---|---|---|---|
| 04-15 | Goncalves Joana Chief Medical Officer · Officer | M | 3,500 | $6.84 | $23.9K |
| 04-15 | Goncalves Joana Chief Medical Officer · Officer | M | 3,500 | $7.80 | $27.3K |
| 04-15 | Goncalves Joana Chief Medical Officer · Officer | S | 4,227 | $65.73 | $277.8K |
| 04-15 | Goncalves Joana Chief Medical Officer · Officer | S | 2,273 | $66.56 | $151.3K |
| 04-15 | Goncalves Joana Chief Medical Officer · Officer | S | 500 | $67.38 | $33.7K |
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions1
- Izzy Englander (Millennium Mgmt)+58,723$1.8M
Added to2
- Ken Griffin (Citadel Advisors)+409,232$12.4M
- T. Rowe Price+22,540$683
Trimmed3
- Steve Cohen (Point72)−437,002$13.2M
- D.E. Shaw & Co.−19,002$576K
- Wellington Management−6,378$193K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2024Q3 | 3 | $13.8M |
| 2024Q4 | 3 | $7.6M |
| 2025Q1 | 6 | $5.6M |
| 2025Q2 | 6 | $5.1M |
| 2025Q3 | 8 | $81.7M |
| 2025Q4 | 8 | $128.6M |
Who owns ORKA
8 super-investors · 2025Q4
Tracked stake
4.89M
shares
Combined value
$129M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added2Trim3Held2
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Andreas Halvorsen Viking Global | 2.67M | $81M |
| 2 | Ken Griffin Citadel Advisors | 726.1K | $22M |
| 3 | Steve Cohen Point72 | 600.0K | $18M |
| 4 | Wellington Management | 84.7K | $3M |
| 5 | D.E. Shaw & Co. | 76.4K | $2M |
| 6 | Izzy Englander Millennium Mgmt | 58.7K | $2M |
| 7 | Two Sigma Investments | 28.6K | $866K |
| 8 | T. Rowe Price | 649.3K | $20K |
Recent moves
20 transactions
- +22,540 · 2025Q4
- TRIMD.E. Shaw & Co.−19,002 · 2025Q4
- +58,723 · 2025Q4
- −6,378 · 2025Q4
- −437,002 · 2025Q4
- +409,232 · 2025Q4
- +27,772 · 2025Q3
- +91,094 · 2025Q3
- −3,776 · 2025Q3
- +215,925 · 2025Q3
- −12,326 · 2025Q3
- +2,666,690 · 2025Q3
- +707,002 · 2025Q3
- −13,900 · 2025Q3
- −12,399 · 2025Q2
- −41,800 · 2025Q2
- −87,501 · 2025Q2
- +67,645 · 2025Q2
- TRIMT. Rowe Price−721 · 2025Q2
- +10,511 · 2025Q2
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