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Who owns Opko Health (OPK) stock

220 funds reported Opko Health (OPK) shares in their latest 13F filings, worth $338M in all. The largest holder is Rubric Capital Management LP ($71.7M). Last quarter 85 funds added to their stakes and 72 cut them.

Largest holders of OPK (13F)Largest holders of OPK (13F)Rubric Capital Management LP$71.7MBlackRock$55.5MVanguard Group$40.9MVanguard Capital Management LLC$22.5MVanguard Portfolio Management LLC$22.4MGeode Capital Management, LLC$17.4MState Street$15.5MGoldman Sachs Group$10.6MUBS Group AG$7.5MWhitefort Capital Management, LP$6.8M

Largest holders (13F)

FundSharesValueChangeQuarter
Rubric Capital Management LP47,791,243$71.7Munchanged2026-06-30
BlackRock36,978,893$55.5Mincrease2026-06-30
Vanguard Group32,457,788$40.9Mdecrease2025-12-31
Vanguard Capital Management LLC14,968,930$22.5Mincrease2026-06-30
Vanguard Portfolio Management LLC14,934,924$22.4Mincrease2026-06-30
Geode Capital Management, LLC11,581,027$17.4Mincrease2026-06-30
State Street10,309,070$15.5Mincrease2026-06-30
Goldman Sachs Group7,035,492$10.6Mdecrease2026-06-30
UBS Group AG5,006,284$7.5Mdecrease2026-06-30
Whitefort Capital Management, LP4,511,412$6.8Mincrease2026-06-30
Northern Trust3,756,163$5.6Mincrease2026-06-30
Highbridge Capital Management LLC3,593,925$5.4Mnew2026-06-30
Charles Schwab Investment Management3,596,980$5.4Mincrease2026-06-30
Vanguard Fiduciary Trust2,706,235$4.1Mdecrease2026-06-30
Morgan Stanley1,975,027$3.0Mincrease2026-06-30

Opko Health's latest quarter

Opko Health, Q3 2026: revenue $65.4M (+16% year over year), operating margin -48.0%, net loss $53.5M, operating cash flow −$36.3M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most OPK stock?

By the latest 13F filings: Rubric Capital Management LP ($71.7M); BlackRock ($55.5M); Vanguard Group ($40.9M); Vanguard Capital Management LLC ($22.5M); Vanguard Portfolio Management LLC ($22.4M).

What is the short interest in OPK?

34,009,478 shares were sold short at the 2026-10-15 settlement, -4.36% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.