OPK · Opko Health, Inc.

$1.52 +0.05 (+3.40%) At close · Sep 1

Russell 2000 member Rebalance outlook locked

Market Cap

$1.10B

746.33M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Quarter:

Holders: 224

Total Value: $303,933,530

Total Shares: 202,622,396

Showing 1–100 of 228 holdings by value · page 1 of 3

Institutional Ownership Trend

26 quarters

Superinvestors Holding OPK

All superinvestors →

Mario Gabelli $262,500

Holder Concentration

Across 224 13F filers · Δ vs Mar 31, 2026

Top Holder

23.6%

−0.2 pts

Top 5

62.3%

+0.4 pts

Top 10

77.4%

+0.1 pts

HHI

1,099

Broadly held+7

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: -13

Institutional value: +32.5%

Shares held: +0.7%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mega STATE STREET CORP	+807,693	10,309,070
Mega MORGAN STANLEY	+778,940	1,975,027
Mega BlackRock, Inc.	+746,670	36,978,893
Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	+547,447	961,484
Mega AQR CAPITAL MANAGEMENT LLC	+475,809	1,239,399

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mega UBS Group AG	−1,065,148	5,006,284
Mega JANE STREET GROUP, LLC	−908,821	254,954
Mega CITADEL ADVISORS LLC	−649,325	1,585,722
Mega GOLDMAN SACHS GROUP INC	−639,534	7,035,492
Mid PFG Investments, LLC	−502,285	610,491

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mid HIGHBRIDGE CAPITAL MANAGEMENT LLC	3,593,925	$5,390,887
Mid ALGERT GLOBAL LLC	397,030	$595,545
Mega Jupiter Topco LLC	206,314	$309,471
Micro Allied Private Wealth LLC	91,137	$136,705
Mega MILLENNIUM MANAGEMENT LLC	72,301	$108,451

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Small Tejara Capital Ltd	877,941	$1,000,852
Mid GSA CAPITAL PARTNERS LLP	663,704	$756,622
Mega FIRST TRUST ADVISORS LP	500,273	$570,311
Mega Qube Research & Technologies Ltd	404,358	$460,968
Small EntryPoint Capital, LLC	342,171	$390,074

Filter: New 25 Increased 74 Reduced 52 Sold out 38 Unchanged 73

Showing 100 of 228

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

Rubric Capital Management LP

$71,686,864

23.59%

47,791,243

BlackRock, Inc.

$55,468,337

18.25%

36,978,893

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BLACKROCK FINANCIAL MANAGEMENT INC/DE	1,169,389	$1,754,083	3.2%	Sole
BlackRock Investment Management (Australia) Ltd	1,796	$2,694	0.0%	Sole
BlackRock Asset Management Canada Ltd	2,330	$3,495	0.0%	Sole
BlackRock Investment Management, LLC	1,148,142	$1,722,213	3.1%	Sole
BLACKROCK ADVISORS LLC	925,635	$1,388,452	2.5%	Sole
BlackRock Fund Advisors	19,139,197	$28,708,795	51.8%	Sole
BlackRock Institutional Trust Company, N.A.	12,874,164	$19,311,246	34.8%	Sole
BlackRock Fund Managers Ltd.	79,524	$119,286	0.2%	Sole
BlackRock Investment Management (UK) Ltd.	79,720	$119,580	0.2%	Sole
BlackRock (Netherlands) B.V.	7,943	$11,914	0.0%	Sole
BlackRock Asset Management Ireland Ltd	918,030	$1,377,045	2.5%	Sole
BlackRock Asset Management Schweiz AG	63,384	$95,076	0.2%	Sole
Aperio Group, LLC	569,639	$854,458	1.5%	Sole

VANGUARD CAPITAL MANAGEMENT LLC

$22,453,395

7.39%

14,968,930

VANGUARD PORTFOLIO MANAGEMENT LLC

$22,402,386

7.37%

14,934,924

GEODE CAPITAL MANAGEMENT, LLC

$17,371,540

5.72%

11,581,027

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	1,552,828	$2,329,242	13.4%	Defined
Held directly	10,028,199	$15,042,298	86.6%	Defined

STATE STREET CORP

$15,463,605

5.09%

10,309,070

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS EUROPE LIMITED joint	10,309,070	$15,463,605	100.0%	Defined

GOLDMAN SACHS GROUP INC

$10,553,237

3.47%

7,035,492

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	354,080	$531,120	5.0%	Defined
GOLDMAN SACHS ASSET MANAGEMENT, L.P.	6,295,597	$9,443,395	89.5%	Defined
GOLDMAN SACHS INTERNATIONAL	203,597	$305,395	2.9%	Defined
Goldman Sachs Trust Company, N.A. joint	182,218	$273,327	2.6%	Defined

UBS Group AG

$7,509,425

2.47%

5,006,284

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Financial Services Inc	1,016,408	$1,524,612	20.3%	Defined
UBS AG	3,972,964	$5,959,446	79.4%	Defined
UBS Switzerland AG	1,991	$2,986	0.0%	Defined
UBS Securities LLC	14,921	$22,381	0.3%	Defined

Whitefort Capital Management, LP

$6,767,118

2.23%

4,511,412

NORTHERN TRUST CORP

$5,634,243

1.85%

3,756,163

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	3,550,434	$5,325,650	94.5%	Defined
NORTHERN TRUST GLOBAL INVESTMENTS LTD	142,454	$213,681	3.8%	Defined
DWS INVESTMENT MANAGEMENT AMERICAS, INC joint	63,275	$94,912	1.7%	Other

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

$5,395,470

1.78%

3,596,980

HIGHBRIDGE CAPITAL MANAGEMENT LLC

$5,390,887

1.77%

3,593,925

VANGUARD FIDUCIARY TRUST CO

$4,059,352

1.34%

2,706,235

AWM Investment Company, Inc.

$3,165,000

1.04%

2,110,000

MORGAN STANLEY

$2,962,539

0.97%

1,975,027

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO INTERNATIONAL PLC	4,224	$6,336	0.2%	Defined
MORGAN STANLEY & CO. LLC	114,149	$171,223	5.8%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	1,538,190	$2,307,285	77.9%	Defined
MORGAN STANLEY SMITH BARNEY LLC	181,717	$272,575	9.2%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	136,747	$205,120	6.9%	Defined

CITADEL ADVISORS LLC

$2,131,383

0.70%

1,420,922

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	1,420,922	$2,131,383	100.0%	Defined

WASHINGTON GROWTH STRATEGIES LLC

$2,034,186

0.67%

1,356,124

Bank of New York Mellon Corp

$1,994,961

0.66%

1,329,974

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Investments Corporation	567,350	$851,025	42.7%	Defined
The Bank of New York Mellon	762,622	$1,143,933	57.3%	Defined
Held directly	2	$3	0.0%	Defined

DIMENSIONAL FUND ADVISORS LP

$1,901,610

0.63%

1,267,741

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Fund Advisors Ltd.	30,263	$45,394	2.4%	Defined
DFA Australia Ltd.	8,859	$13,288	0.7%	Defined
Dimensional Ireland Ltd	539,286	$808,929	42.5%	Defined
Held directly	689,333	$1,033,999	54.4%	Sole

Y.D. More Investments Ltd

$1,886,352

0.62%

1,257,568

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
More Mutual Funds Management (2013) Ltd.	1,257,568	$1,886,352	100.0%	Defined

AQR CAPITAL MANAGEMENT LLC

$1,859,096

0.61%

1,239,399

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RF&L WEALTH MANAGEMENT, LLC	27	$40	0.0%	Other
Prism Planning Partners LLC	423	$634	0.0%	Other
Compound Planning, Inc.	132	$198	0.0%	Other
Arax Advisory Partners	8,253	$12,379	0.7%	Other
HALBERT HARGROVE GLOBAL ADVISORS, LLC	8,400	$12,600	0.7%	Other
Stokes Family Office, LLC	7,563	$11,344	0.6%	Other
Held directly	1,214,601	$1,821,901	98.0%	Defined

OP Asset Management Ltd

$1,739,470

0.57%

1,159,647

VOYA INVESTMENT MANAGEMENT LLC

$1,641,166

0.54%

1,094,111

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Voya Investment Management Co. LLC joint	1,094,111	$1,641,166	100.0%	Defined

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM

$1,442,226

0.47%

961,484

Clearstead Advisors, LLC

$1,324,932

0.44%

883,288

Nuveen, LLC

$1,294,552

0.43%

863,035

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Nuveen Asset Management, LLC joint	26,205	$39,307	3.0%	Defined
TEACHERS ADVISORS, LLC joint	836,830	$1,255,245	97.0%	Defined

BANK OF AMERICA CORP /DE/

$1,193,573

0.39%

795,716

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BANK OF AMERICA NA	315,081	$472,621	39.6%	Defined
MERRILL LYNCH, PIERCE, FENNER & SMITH INC.	256,204	$384,306	32.2%	Defined
BOFA SECURITIES, INC.	171,695	$257,542	21.6%	Defined
MERRILL LYNCH INTERNATIONAL	52,736	$79,104	6.6%	Defined

Swiss National Bank

$1,142,182

0.38%

761,455

Invesco Ltd.

$1,027,613

0.34%

685,076

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Invesco Advisers, Inc. joint	53,359	$80,038	7.8%	Defined
Invesco Trust Co joint	162,314	$243,471	23.7%	Defined
Invesco Capital Management LLC	469,403	$704,104	68.5%	Defined

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$935,341

0.31%

623,561

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	608,518	$912,777	97.6%	Other
G1 EXECUTION SERVICES, LLC	15,043	$22,564	2.4%	Other

PFG Investments, LLC

$915,736

0.30%

610,491

UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC

$861,158

0.28%

574,107

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Group AG	1,283	$1,924	0.2%	Defined
UBS Asset Management Switzerland AG	468,159	$702,238	81.5%	Sole
UBS Asset Management (UK) Ltd.	33,655	$50,482	5.9%	Other
Held directly	71,010	$106,514	12.4%	Defined

Kovack Advisors, Inc.

$804,303

0.26%

536,202

RHUMBLINE ADVISERS

$748,291

0.25%

498,861

PRICE T ROWE ASSOCIATES INC /MD/

$683,622

0.22%

455,748

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
T. Rowe Price International Ltd	455,748	$683,622	100.0%	Defined

ALLIANCEBERNSTEIN L.P.

$664,020

0.22%

442,680

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Equitable Holdings, Inc.	442,680	$664,020	100.0%	Defined

VAN ECK ASSOCIATES CORP

$657,967

0.22%

438,645

COMMONWEALTH EQUITY SERVICES, LLC

$647,841

0.21%

431,894

Connor, Clark & Lunn Investment Management Ltd.

$618,076

0.20%

412,051

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Manager 1	410,260	$615,390	99.6%	Sole
Held directly	1,791	$2,686	0.4%	Sole

DEUTSCHE BANK AG\

$597,904

0.20%

398,603

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
DWS Investments UK Ltd	398,603	$597,904	100.0%	Defined

ALGERT GLOBAL LLC

$595,545

0.20%

397,030

WELLS FARGO & COMPANY/MN

$531,058

0.17%

354,039

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WELLS FARGO BANK N A	347,537	$521,305	98.2%	Defined
WELLS FARGO CLEARING SERVICES, LLC	6,502	$9,753	1.8%	Defined

Legal & General Group Plc

$520,180

0.17%

346,787

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Legal & General Investment Management America Inc	39,438	$59,157	11.4%	Defined
Legal & General Investment Management Ltd joint	307,349	$461,023	88.6%	Defined

VANGUARD ASSET MANAGEMENT, Ltd

$441,019

0.15%

294,013

ROYAL BANK OF CANADA

$434,717

0.14%

289,812

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC CMA LTD.	12,218	$18,327	4.2%	Defined
RBC Capital Markets, LLC	36,882	$55,323	12.7%	Defined
RBC Dominion Securities Inc.	177,921	$266,881	61.4%	Defined
CITY NATIONAL BANK	1,080	$1,620	0.4%	Defined
Held directly	61,711	$92,566	21.3%	Sole

XTX Topco Ltd

$429,259

0.14%

286,173

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	286,173	$429,259	100.0%	Defined

Assenagon Asset Management S.A.

$428,008

0.14%

285,339

Creative Planning

$369,097

0.12%

246,065

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
CREATIVE PLANNING TRUST Co LLC	1,858	$2,787	0.8%	Defined
Held directly	244,207	$366,310	99.2%	Sole

TUDOR INVESTMENT CORP ET AL

$367,231

0.12%

244,821

JANE STREET GROUP, LLC

$344,181

0.11%

229,454

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	229,454	$344,181	100.0%	Defined

MetLife Investment Management, LLC

$340,198

0.11%

226,799

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
METLIFE INC	226,799	$340,198	100.0%	Defined

Russell Investments Group, Ltd.

$323,730

0.11%

215,820

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Russell Investment Management, LLC	215,820	$323,730	100.0%	Defined

Jupiter Topco LLC

$309,471

0.10%

206,314

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JANUS HENDERSON INVESTORS UK Ltd	206,314	$309,471	100.0%	Defined

HSBC HOLDINGS PLC

$299,949

0.10%

199,966

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
HSBC BANK PLC	199,966	$299,949	100.0%	Defined

CITIGROUP INC

$299,735

0.10%

199,824

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citigroup Financial Products Inc. joint	199,824	$299,735	100.0%	Defined

MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.

$278,346

0.09%

185,564

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Global X Management CO LLC joint	185,564	$278,346	100.0%	Defined

Vanguard Global Advisers, LLC

$272,649

0.09%

181,766

STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM

$264,390

0.09%

176,260

TWO SIGMA INVESTMENTS, LP

$263,701

0.09%

175,801

GAMCO INVESTORS, INC. ET AL

$262,500

0.09%

175,000

GABELLI FUNDS LLC

$255,000

0.08%

170,000

FIFTH THIRD BANCORP

$255,000

0.08%

170,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fifth Third Bank, National Association	170,000	$255,000	100.0%	Defined

IEQ CAPITAL, LLC

$254,137

0.08%

169,425

JPMORGAN CHASE & CO

$252,457

0.08%

168,305

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JPMorgan Chase Bank, N.A.	167,066	$250,599	99.3%	Defined
J.P. Morgan Investment Management Inc.	1,100	$1,650	0.7%	Defined
J.P. Morgan SE	139	$208	0.1%	Defined

360 Financial, Inc.

$225,450

0.07%

150,300

Point72 Asset Management, L.P.

$217,851

0.07%

145,234

Teton Advisors, LLC

$210,000

0.07%

140,000

Police & Firemen's Retirement System of New Jersey

$198,694

0.07%

132,463

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Capital	132,463	$198,694	100.0%	Defined

MANUFACTURERS LIFE INSURANCE COMPANY, THE

$178,698

0.06%

119,132

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MANULIFE FINANCIAL CORP joint	119,132	$178,698	100.0%	Defined

HIGHLINE WEALTH PARTNERS LLC

$175,020

0.06%

116,680

State of Wyoming

$174,733

0.06%

116,489

NEW YORK STATE COMMON RETIREMENT FUND

$171,451

0.06%

114,301

SG Americas Securities, LLC

$170,772

0.06%

113,848

GLENMEDE TRUST CO NA

$169,125

0.06%

112,750

Vanguard Investments Australia, Ltd.

$166,437

0.05%

110,958

Headlands Technologies LLC

$161,983

0.05%

107,989

ARIZONA STATE RETIREMENT SYSTEM

$157,087

0.05%

104,725

CITADEL ADVISORS LLC

$156,150

0.05%

104,100

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	104,100	$156,150	100.0%	Defined

ZAZOVE ASSOCIATES LLC

$150,000

0.05%

100,000

BARCLAYS PLC

$149,394

0.05%

99,596

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	93,740	$140,610	94.1%	Defined
BARCLAYS CAPITAL INC.	5,856	$8,784	5.9%	Defined

AMERIPRISE FINANCIAL INC

$141,091

0.05%

94,061

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Columbia Management Investment Advisers, LLC	1	$1	0.0%	Defined
Ameriprise Financial Services, LLC joint	94,060	$141,090	100.0%	Defined

Arax Advisory Partners

$140,424

0.05%

93,616

Allied Private Wealth LLC

$136,705

0.04%

91,137

Cerity Partners LLC

$136,647

0.04%

91,099

KLP KAPITALFORVALTNING AS

$136,050

0.04%

90,700

RPg Family Wealth Advisory, LLC

$132,928

0.04%

88,619

INTECH INVESTMENT MANAGEMENT LLC

$128,824

0.04%

85,883

WEALTH ENHANCEMENT ADVISORY SERVICES, LLC

$125,991

0.04%

83,994

Cambridge Investment Research Advisors, Inc.

$125,512

0.04%

83,675

MERCER GLOBAL ADVISORS INC /ADV

$115,212

0.04%

76,808

MILLENNIUM MANAGEMENT LLC

$108,451

0.04%

72,301

OSAIC HOLDINGS, INC.

$104,350

0.03%

69,567

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	68,967	$103,450	99.1%	Defined
Osaic Advisory Services, LLC	600	$900	0.9%	Defined

PRUDENTIAL FINANCIAL INC

$103,464

0.03%

68,976

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
PGIM Quantitative Solutions LLC	68,976	$103,464	100.0%	Defined

Cascade Financial Partners, LLC

$99,735

0.03%

66,490

Pictet Asset Management Holding SA

$98,242

0.03%

65,495

CAPTRUST FINANCIAL ADVISORS

$95,556

0.03%

63,704

PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO

$92,253

0.03%

61,502

Cetera Investment Advisers

$91,420

0.03%

60,947

CITADEL ADVISORS LLC

$91,050

0.03%

60,700

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	60,700	$91,050	100.0%	Defined

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$89,250

0.03%

59,500

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	59,500	$89,250	100.0%	Other

Key facts CIK 944809 CUSIP 68375N103 13F (30d) 170 filings 169 filers Visit website Investor relations