OPKO Health
OPK · NASDAQ
$1.66+$0.05 (+3.11%)TodayMarket closed ·
Prev close $1.61
Who owns OPK
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 63.8% of OPK’s shares.
- Frost Gamma Investments Trust29.8%
- Rubric Capital Management LP6.4%
- Holbrook (Bruce C)5.4%
- Hsiao (Jane H)4.4%
- Next 6 largest institutions17.7%
- All other shareholders36.2%
| Holder | Shares | % of shares |
|---|---|---|
| Frost Gamma Investments Trust | 222.63M | 29.83% |
| Rubric Capital Management LP | 47.79M | 6.40% |
| Holbrook (Bruce C) | 40.38M | 5.41% |
| Hsiao (Jane H) | 33.13M | 4.44% |
| BlackRock Institutional Trust Company, N.A. | 32.01M | 4.29% |
| Frost Group, L.L.C. | 30.13M | 4.04% |
| GJN 2021 Trust | 19.91M | 2.67% |
| EGN 2021 Trust | 19.91M | 2.67% |
| Vanguard Capital Management, LLC | 14.97M | 2.01% |
| Vanguard Portfolio Management, LLC | 14.93M | 2.00% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Russell 2000 ETF | 10.43M | 1.40% |
| Vanguard Total Stock Market Index Fund | 9.75M | 1.31% |
| Vanguard Small-Cap Index Fund | 6.93M | 0.93% |
| Vanguard Extended Market Index Fund | 4.93M | 0.66% |
| Fidelity Small Cap Index Fund | 4.36M | 0.58% |
Insider trades
Form 4 filings by officers, directors and large holders
Insiders made no open-market buys or sales of OPK in the last 6 months.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Rubin Steven D | Tax withholding | 53.27K | $64.98K |
| Logal Adam | Tax withholding | 53.27K | $64.98K |
| Lachman Prem A | Award | 30.00K | — |
| Yu Alice Lin-Tsing | Award | 30.00K | — |
| UPPALURI SUBBARAO V | Award | 80.00K | — |
| PAGANELLI JOHN A | Award | 30.00K | — |
| PFENNIGER RICHARD C JR | Award | 60.00K | — |
| MEDEL ROGER MD | Award | 30.00K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 35.56M
- Days to cover
- 14.94
- % of shares outstanding
- 4.76%
- Average daily volume
- 2.38M
- Change since last report
- −1.2%
Information on this page is provided for informational purposes only and is not a recommendation to buy, sell or hold any security. Investing involves risk, including possible loss of principal. Market data is delayed at least 15 minutes and is provided without warranty. Analyst ratings, price targets and company data come from third-party sources. Past performance does not guarantee future results.