OPK · Insider trading · 13F holders · Congress trades
P Opko Health, Inc. (OPK)
Who is buying and selling OPK: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 6
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 3
OPK at a glance
- No open-market insider purchases or sales of OPK were filed in the last 90 days.
- 6 13F filers hold OPK among their 50 largest positions, worth $80.8M combined. The biggest bets by portfolio weight are Whitefort Capital Management, LP (1.7%), Washington Growth Strategies LLC (1.2%) and Rubric Capital Management LP (0.7%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
- Members of Congress have disclosed 3 OPK trades since 2017, 3 purchases and 0 sales in the past year; the latest was Carlos Curbelo (R-FL), buying $1K–15K on Sep 26, 2017.
- OPK last closed at $1.69 on Oct 30, 2026.
OPK insider trading
No open-market insider purchases or sales of OPK were filed in the last 90 days.
Who owns OPK? Hedge funds and superinvestors
6 13F filers hold OPK among their 50 largest positions, worth $80.8M combined. The biggest bets by portfolio weight are Whitefort Capital Management, LP (1.7%), Washington Growth Strategies LLC (1.2%) and Rubric Capital Management LP (0.7%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Rubric Capital Management LPHedge fund | 0.7% | $71.7M | 47,791,243 | +0.0% shares | Q2 2026 |
| Whitefort Capital Management, LPHedge fund | 1.7% | $6.8M | 4,511,412 | +6.1% shares | Q2 2026 |
| Washington Growth Strategies LLCWealth manager | 1.2% | $2.2M | 1,356,124 | +0.0% shares | Q3 2026 |
| Zazove Associates LLCInstitutional asset manager | 0.2% | $150K | 100,000 | -33.3% shares | Q2 2026 |
| Cumberland Advisors IncWealth manager | 0.0% | $29K | 19,500 | +0.0% shares | Q2 2026 |
| Greenbush Financial Group, LLCWealth manager | 0.0% | $16K | 10,000 | +0.0% shares | Q3 2026 |
Each manager counts with its latest 13F (Q3 2026: 2, Q2 2026: 4). Screen OPK in the grand portfolio →
OPK stock trades by members of Congress
Members of Congress have disclosed 3 OPK trades since 2017, 3 purchases and 0 sales in the past year; the latest was Carlos Curbelo (R-FL), buying $1K–15K on Sep 26, 2017.
| Filed | Member | Trade | Amount | Traded | Since |
|---|---|---|---|---|---|
| Oct 3, 2017 | Carlos CurbeloR-FL · House | Buy | $1K–15K | Sep 26, 2017 | -76.3% |
| Mar 2, 2017 | Carlos CurbeloR-FL · House | Buy | $1K–15K | Mar 2, 2017 | -77.3% |
| Feb 7, 2017 | Carlos CurbeloR-FL · House | Buy | $1K–15K | Feb 7, 2017 | -79.7% |
OPK questions and answers
Are insiders buying OPK stock?
No open-market insider purchases or sales of OPK were filed in the last 90 days.
Which hedge funds own OPK?
6 13F filers hold OPK among their 50 largest positions, worth $80.8M combined. The biggest bets by portfolio weight are Whitefort Capital Management, LP (1.7%), Washington Growth Strategies LLC (1.2%) and Rubric Capital Management LP (0.7%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
Has Congress traded OPK?
Members of Congress have disclosed 3 OPK trades since 2017, 3 purchases and 0 sales in the past year; the latest was Carlos Curbelo (R-FL), buying $1K–15K on Sep 26, 2017.
Who is the largest holder of OPK?
Among 13F filers, Rubric Capital Management LP reports the largest OPK position, $71.7M (47,791,243 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Whitefort Capital Management, LP's: 1.7% of its portfolio.
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