OMER · Omeros Corp

$18.87 +0.08 (+0.43%)

Russell 2000 member Rebalance outlook locked

Market Cap

$1.35B

72.39M

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: 175

Total Value: $392,330,274

Total Shares: 41,254,510

Showing 1–100 of 185 holdings by value · page 1 of 2

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 175 13F filers · Δ vs Mar 31, 2026

Top Holder

14.7%

−1.6 pts

Top 5

44.2%

−5.2 pts

Top 10

64.4%

−5.0 pts

HHI

562

Broadly held−111

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: +13

Institutional value: +14.0%

Shares held: +26.6%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP	+811,064	2,215,194
Mega UBS Group AG	+807,653	3,148,384
Mega BlackRock, Inc.	+735,007	6,044,633
Mega Invesco Ltd.	+571,142	751,771
Mega STATE STREET CORP	+400,331	2,319,906

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Large Corient Private Wealth LLC	−141,681	659,730
Mega MILLENNIUM MANAGEMENT LLC	−66,770	343,839
Mid Susquehanna Portfolio Strategies, LLC	−51,004	41,755
Large Walleye Capital LLC	−46,359	94,674
Mega GOLDMAN SACHS GROUP INC	−45,885	157,008

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mid Affinity Asset Advisors, LLC	1,411,300	$13,421,463
Mid Rock Springs Capital Management LP	718,499	$6,832,925
Large Rubric Capital Management LP	656,874	$6,246,871
Large Caption Management, LLC	614,500	$5,843,895
Large FEDERATED HERMES, INC.	478,290	$4,548,537

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mid Polar Asset Management Partners Inc.	200,000	$2,112,000
Mid Jump Financial, LLC	195,824	$2,067,901
Mega DIMENSIONAL FUND ADVISORS LP	179,594	$1,896,511
Small Prosight Management, LP	174,800	$1,845,888
Large MARSHALL WACE, LLP	83,682	$883,681

Filter: New 38 Increased 71 Reduced 40 Sold out 25 Unchanged 26

Showing 100 of 185

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

BlackRock, Inc.

$57,484,454

14.65%

6,044,633

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	54,620	$519,436	0.9%	Sole
BlackRock Asset Management Canada Ltd	326	$3,100	0.0%	Sole
BlackRock Investment Management, LLC	216,297	$2,056,984	3.6%	Sole
BLACKROCK ADVISORS LLC	161,826	$1,538,965	2.7%	Sole
BlackRock Fund Advisors	3,194,290	$30,377,697	52.8%	Sole
BlackRock Institutional Trust Company, N.A.	2,221,527	$21,126,721	36.8%	Sole
BlackRock Fund Managers Ltd.	9,951	$94,634	0.2%	Sole
BlackRock (Netherlands) B.V.	11,635	$110,648	0.2%	Sole
BlackRock Asset Management Ireland Ltd	109,075	$1,037,303	1.8%	Sole
BlackRock Asset Management Schweiz AG	10,990	$104,514	0.2%	Sole
Aperio Group, LLC	54,075	$514,253	0.9%	Sole
SpiderRock Advisors, LLC	21	$199	0.0%	Sole

INGALLS & SNYDER LLC

$34,802,063

8.87%

3,659,523

UBS Group AG

$29,941,130

7.63%

3,148,384

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	352,488	$3,352,160	11.2%	Defined
UBS AG	2,786,626	$26,500,813	88.5%	Defined
UBS Switzerland AG	5,822	$55,367	0.2%	Defined
UBS Securities LLC	3,448	$32,790	0.1%	Defined

VANGUARD CAPITAL MANAGEMENT LLC

$29,215,195

7.45%

3,072,050

STATE STREET CORP

$22,062,306

5.62%

2,319,906

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	2,319,906	$22,062,306	100.0%	Defined

GEODE CAPITAL MANAGEMENT, LLC

$18,206,514

4.64%

1,914,460

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	265,624	$2,526,084	13.9%	Defined
Held directly	1,648,836	$15,680,430	86.1%	Defined

STIFEL FINANCIAL CORP

$17,469,155

4.45%

1,836,925

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

Manager	Shares	Value (USD)	% of position	Discretion
STIFEL NICOLAUS & CO INC \MO\	1,821,472	$17,322,198	99.2%	Defined
1919 Investment Counsel, LLC	15,416	$146,606	0.8%	Defined
Held directly	37	$351	0.0%	Defined

Affinity Asset Advisors, LLC

$13,421,463

3.42%

1,411,300

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$9,237,063

2.35%

971,300

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

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	971,300	$9,237,063	100.0%	Other

VANGUARD PORTFOLIO MANAGEMENT LLC

$9,156,494

2.33%

962,828

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$8,736,837

2.23%

918,700

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

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	918,700	$8,736,837	100.0%	Other

Invesco Ltd.

$7,149,338

1.82%

751,771

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	10,193	$96,933	1.4%	Defined
Invesco Trust Co joint	28,788	$273,773	3.8%	Defined
Invesco Capital Management LLC	712,790	$6,778,632	94.8%	Defined

NORTHERN TRUST CORP

$6,917,077

1.76%

727,348

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	687,460	$6,537,744	94.5%	Defined
NORTHERN TRUST GLOBAL INVESTMENTS LTD	28,567	$271,671	3.9%	Defined
DWS INVESTMENT MANAGEMENT AMERICAS, INC joint	11,321	$107,662	1.6%	Other

Rock Springs Capital Management LP

$6,832,925

1.74%

718,499

Corient Private Wealth LLC

$6,274,032

1.60%

659,730

Rubric Capital Management LP

$6,246,871

1.59%

656,874

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

$5,750,059

1.47%

604,633

BANK OF MONTREAL /CAN/

$5,405,711

1.38%

568,424

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

Manager	Shares	Value (USD)	% of position	Discretion
BMO Family Office, LLC	5,329	$50,678	0.9%	Defined
Held directly	563,095	$5,355,033	99.1%	Defined

VANGUARD FIDUCIARY TRUST CO

$4,671,055

1.19%

491,173

FEDERATED HERMES, INC.

$4,548,537

1.16%

478,290

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

Manager	Shares	Value (USD)	% of position	Discretion
FEDERATED EQUITY MANAGEMENT CO OF PENNSYLVANIA	51,736	$492,009	10.8%	Defined
FEDERATED MDTA LLC	426,554	$4,056,528	89.2%	Defined

CITADEL ADVISORS LLC

$4,507,740

1.15%

474,000

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	474,000	$4,507,740	100.0%	Defined

Clutterbuck Capital Management LLC

$4,279,500

1.09%

450,000

TWO SIGMA INVESTMENTS, LP

$3,829,315

0.98%

402,662

MORGAN STANLEY

$3,751,300

0.96%

394,459

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	8,017	$76,241	2.0%	Defined
MORGAN STANLEY & CO. LLC	66,388	$631,349	16.8%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	64,194	$610,484	16.3%	Defined
MORGAN STANLEY SMITH BARNEY LLC	140,715	$1,338,199	35.7%	Defined
Morgan Stanley Bank, N.A.	9,998	$95,080	2.5%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	105,147	$999,947	26.7%	Defined

Caption Management, LLC

$3,462,591

0.88%

364,100

MILLENNIUM MANAGEMENT LLC

$3,269,908

0.83%

343,839

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$3,092,594

0.79%

325,194

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

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	314,507	$2,990,961	96.7%	Other
G1 EXECUTION SERVICES, LLC	10,687	$101,633	3.3%	Other

CITADEL ADVISORS LLC

$2,571,504

0.66%

270,400

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	270,400	$2,571,504	100.0%	Defined

Badgley Phelps Wealth Managers, LLC

$2,506,417

0.64%

263,556

WELLINGTON MANAGEMENT GROUP LLP

$1,945,184

0.50%

204,541

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

Manager	Shares	Value (USD)	% of position	Discretion
Wellington Management Company LLP	64,800	$616,248	31.7%	Defined
Wellington Trust Company, NA joint	130,684	$1,242,804	63.9%	Defined
Wellington Management Australia Pty Ltd	9,057	$86,132	4.4%	Defined

JANE STREET GROUP, LLC

$1,904,853

0.49%

200,300

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	200,300	$1,904,853	100.0%	Defined

Bank of New York Mellon Corp

$1,863,863

0.48%

195,990

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

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Investments Corporation	54,498	$518,275	27.8%	Defined
The Bank of New York Mellon	139,505	$1,326,692	71.2%	Defined
BNY Mellon, NA joint	1,985	$18,877	1.0%	Defined
Held directly	2	$19	0.0%	Defined

BANK OF AMERICA CORP /DE/

$1,846,270

0.47%

194,140

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	98,463	$936,383	50.7%	Defined
MERRILL LYNCH, PIERCE, FENNER & SMITH INC.	81,390	$774,018	41.9%	Defined
BOFA SECURITIES, INC.	14,287	$135,869	7.4%	Defined

Nuveen, LLC

$1,616,242

0.41%

169,952

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	12,072	$114,804	7.1%	Defined
TEACHERS ADVISORS, LLC joint	157,880	$1,501,438	92.9%	Defined

Ancora Advisors LLC

$1,604,812

0.41%

168,750

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

Manager	Shares	Value (USD)	% of position	Discretion
Clutterbuck Capital Management LLC	168,750	$1,604,812	100.0%	Other

GOLDMAN SACHS GROUP INC

$1,493,145

0.38%

157,008

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	89,289	$849,138	56.9%	Defined
GOLDMAN SACHS ASSET MANAGEMENT, L.P.	67,719	$644,007	43.1%	Defined

WELLS FARGO & COMPANY/MN

$1,492,014

0.38%

156,889

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	62,426	$593,671	39.8%	Defined
WELLS FARGO ADVISORS FINANCIAL NETWORK, LLC	800	$7,608	0.5%	Defined
WELLS FARGO CLEARING SERVICES, LLC	93,663	$890,735	59.7%	Defined

LMR Partners LLP

$1,384,656

0.35%

145,600

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

Manager	Shares	Value (USD)	% of position	Discretion
Wabon Partners, L.P.	145,600	$1,384,656	100.0%	Sole

Swiss National Bank

$1,305,723

0.33%

137,300

Virtus Investment Advisers, LLC

$1,266,056

0.32%

133,129

Caption Management, LLC

$1,236,300

0.32%

130,000

PRICE T ROWE ASSOCIATES INC /MD/

$1,232,020

0.31%

129,550

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	129,550	$1,232,020	100.0%	Defined

JANE STREET GROUP, LLC

$1,192,554

0.30%

125,400

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	125,400	$1,192,554	100.0%	Defined

Caption Management, LLC

$1,145,004

0.29%

120,400

MML INVESTORS SERVICES, LLC

$1,123,844

0.29%

118,175

AMERIPRISE FINANCIAL INC

$1,117,006

0.28%

117,456

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	920	$8,749	0.8%	Defined
Ameriprise Financial Services, LLC	116,536	$1,108,257	99.2%	Defined

HighTower Advisors, LLC

$1,097,149

0.28%

115,368

RHUMBLINE ADVISERS

$1,048,677

0.27%

110,271

PEAK6 LLC

$951,000

0.24%

100,000

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

Manager	Shares	Value (USD)	% of position	Discretion
PEAK6 Investments LLC joint	100,000	$951,000	100.0%	Defined

Brevan Howard Capital Management LP

$932,426

0.24%

98,047

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

Manager	Shares	Value (USD)	% of position	Discretion
Brevan Howard US Investment Management, LP	98,047	$932,426	100.0%	Defined

Cambridge Investment Research Advisors, Inc.

$878,752

0.22%

92,403

CITADEL ADVISORS LLC

$813,998

0.21%

85,594

COLDSTREAM CAPITAL MANAGEMENT INC

$805,905

0.21%

84,743

Quantinno Capital Management LP

$796,804

0.20%

83,786

Balyasny Asset Management L.P.

$794,636

0.20%

83,558

JUPITER ASSET MANAGEMENT LTD

$724,528

0.18%

76,186

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM

$720,192

0.18%

75,730

DEUTSCHE BANK AG\

$713,753

0.18%

75,053

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

Manager	Shares	Value (USD)	% of position	Discretion
DWS INVESTMENT MANAGEMENT AMERICAS, INC	523	$4,973	0.7%	Defined
DWS Investments UK Ltd	74,530	$708,780	99.3%	Defined

CITIGROUP INC

$692,603

0.18%

72,829

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	72,829	$692,603	100.0%	Defined

MINDSET WEALTH MANAGEMENT, LLC

$671,406

0.17%

70,600

ALLIANCEBERNSTEIN L.P.

$637,074

0.16%

66,990

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

Manager	Shares	Value (USD)	% of position	Discretion
Equitable Holdings, Inc.	66,990	$637,074	100.0%	Defined

AMERICAN FINANCIAL GROUP INC

$609,714

0.16%

64,113

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

Manager	Shares	Value (USD)	% of position	Discretion
Great American Insurance Company	64,113	$609,714	100.0%	Defined

STATE OF WISCONSIN INVESTMENT BOARD

$573,823

0.15%

60,339

GROUP ONE TRADING LLC

$558,208

0.14%

58,697

Vanguard Global Advisers, LLC

$532,740

0.14%

56,019

Squarepoint Ops LLC

$523,335

0.13%

55,030

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

Manager	Shares	Value (USD)	% of position	Discretion
Squarepoint Capital LLP	55,030	$523,335	100.0%	Defined

Walleye Capital LLC

$515,442

0.13%

54,200

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

$507,471

0.13%

53,362

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

Manager	Shares	Value (USD)	% of position	Discretion
UBS Group AG	547	$5,201	1.0%	Defined
UBS Asset Management Switzerland AG	52,815	$502,270	99.0%	Sole

VANGUARD ASSET MANAGEMENT, Ltd

$454,283

0.12%

47,769

BARCLAYS PLC

$448,462

0.11%

47,157

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

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	45,032	$428,254	95.5%	Defined
BARCLAYS CAPITAL INC.	2,125	$20,208	4.5%	Defined

NFSG Corp

$439,457

0.11%

46,210

Headlands Technologies LLC

$431,763

0.11%

45,401

Legal & General Group Plc

$424,962

0.11%

44,686

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	7,001	$66,579	15.7%	Defined
Legal & General Investment Management Ltd joint	37,685	$358,383	84.3%	Defined

MetLife Investment Management, LLC

$413,780

0.11%

43,510

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

Manager	Shares	Value (USD)	% of position	Discretion
METLIFE INC	43,510	$413,780	100.0%	Defined

Zurcher Kantonalbank (Zurich Cantonalbank)

$407,417

0.10%

42,841

PRUDENTIAL FINANCIAL INC

$403,081

0.10%

42,385

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	42,385	$403,081	100.0%	Defined

JPMORGAN CHASE & CO

$401,768

0.10%

42,247

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.	29,906	$284,406	70.8%	Defined
J.P. Morgan Investment Management Inc.	7,216	$68,624	17.1%	Defined
J.P. Morgan Securities LLC	400	$3,804	0.9%	Defined
J.P. Morgan Securities plc	4,725	$44,934	11.2%	Defined

Susquehanna Portfolio Strategies, LLC

$397,090

0.10%

41,755

INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC

$384,204

0.10%

40,400

Walleye Capital LLC

$381,351

0.10%

40,100

FIFTH THIRD BANCORP

$370,890

0.09%

39,000

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	39,000	$370,890	100.0%	Defined

Optimize Financial Inc

$363,985

0.09%

38,274

Sound Capital Solutions LLC

$363,985

0.09%

38,274

Cerity Partners LLC

$353,657

0.09%

37,188

MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.

$315,893

0.08%

33,217

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	33,217	$315,893	100.0%	Defined

LPL Financial LLC

$314,143

0.08%

33,033

Diametric Capital, LP

$313,925

0.08%

33,010

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

Manager	Shares	Value (USD)	% of position	Discretion
Thakore Nainoor	33,010	$313,925	100.0%	Defined

COMPASS FINANCIAL MANAGEMENT LLC

$312,070

0.08%

32,815

Focus Partners Wealth

$301,685

0.08%

31,723

BRIGHTON JONES LLC

$300,487

0.08%

31,597

Avantax Planning Partners, Inc.

$295,761

0.08%

31,100

Jupiter Topco LLC

$290,055

0.07%

30,500

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	30,500	$290,055	100.0%	Defined

Russell Investments Group, Ltd.

$287,981

0.07%

30,282

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	30,282	$287,981	100.0%	Defined

AQR CAPITAL MANAGEMENT LLC

$282,692

0.07%

29,726

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

Manager	Shares	Value (USD)	% of position	Discretion
Compound Planning, Inc.	9	$85	0.0%	Other
Arax Advisory Partners	1,483	$14,103	5.0%	Other
HALBERT HARGROVE GLOBAL ADVISORS, LLC	120	$1,141	0.4%	Other
Stokes Family Office, LLC	20	$190	0.1%	Other
Held directly	28,094	$267,173	94.5%	Defined

BRIDGEWAY CAPITAL MANAGEMENT, LLC

$256,770

0.07%

27,000

Merit Financial Group, LLC

$255,247

0.07%

26,840

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

Manager	Shares	Value (USD)	% of position	Discretion
Orion Custom Indexing	103	$979	0.4%	Other
AQR Capital Management	317	$3,014	1.2%	Other
Held directly	26,420	$251,254	98.4%	Sole

PROFUND ADVISORS LLC

$250,293

0.06%

26,319

Atom Investors LP

$227,716

0.06%

23,945

Creative Planning

$221,411

0.06%

23,282

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	174	$1,654	0.7%	Defined
Held directly	23,108	$219,757	99.3%	Sole

AXQ CAPITAL, LP

$221,069

0.06%

23,246

Key facts CIK 1285819 CUSIP 682143102 13F (30d) 150 filings 148 filers Visit website Investor relations