OMER US Equity

OMEROS CORP

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Health Care · Pharmaceutical Preparations · CIK 1285819 · FYE 1231

$11.28

-0.06 (-0.53%)

USD · as of 2026-07-28 · marketstack

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Institutional ownership· 13F filers holding OMER · 2026-Q1 methodology → sources →

160 holders

% of shares outstanding held

42.6%

Shares held (13F)

30,812,988

Reporting holders

160

Top holders

largest 100 of 160 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	BlackRock, Inc.	5,309,6265.3M	$56M	7.34%	ADD 5%
2	INGALLS & SNYDER LLC	3,559,4233.6M	$38M	4.92%	ADD 3%
3	VANGUARD CAPITAL MANAGEMENT LLC	2,983,2593.0M	$32M	4.12%	NEW†
4	UBS Group AG	2,340,7312.3M	$25M	3.23%	ADD 5%
5	STATE STREET CORP	1,919,5751.9M	$20M	2.65%	ADD 22%
6	STIFEL FINANCIAL CORP	1,831,5851.8M	$19M	2.53%	—
7	GEODE CAPITAL MANAGEMENT, LLC	1,752,3231.8M	$19M	2.42%	ADD 7%
8	Corient Private Wealth LLC	801,411801,411	$8M	1.11%	TRIM -42%
9	VANGUARD PORTFOLIO MANAGEMENT LLC	718,675718,675	$8M	0.99%	NEW
10	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	582,512582,512	$6M	0.80%	—
11	BANK OF MONTREAL /CAN/	568,426568,426	$6M	0.79%	TRIM -6%
12	NORTHERN TRUST CORP	563,867563,867	$6M	0.78%	ADD 7%
13	VANGUARD FIDUCIARY TRUST CO	492,345492,345	$5M	0.68%	NEW
14	SUSQUEHANNA INTERNATIONAL GROUP, LLP	485,030485,030	$5M	0.67%	TRIM -35%
15	MILLENNIUM MANAGEMENT LLC	410,609410,609	$4M	0.57%	TRIM -7%
16	MORGAN STANLEY	317,892317,892	$3M	0.44%	TRIM -18%
17	Clutterbuck Capital Management LLC	300,000300,000	$3M	0.41%	ADD 100%
18	TWO SIGMA INVESTMENTS, LP	286,474286,474	$3M	0.40%	TRIM -45%
19	Badgley Phelps Wealth Managers, LLC	263,556263,556	$3M	0.36%	—
20	CITADEL ADVISORS LLC	260,048260,048	$3M	0.36%	ADD 8%
21	BANK OF AMERICA CORP /DE/	204,805204,805	$2M	0.28%	ADD 78%
22	GOLDMAN SACHS GROUP INC	202,893202,893	$2M	0.28%	TRIM -11%
23	Polar Asset Management Partners Inc.	200,000200,000	$2M	0.28%	ADD 191%
24	Jump Financial, LLC	195,824195,824	$2M	0.27%	TRIM -14%
25	WELLINGTON MANAGEMENT GROUP LLP	187,300187,300	$2M	0.26%	TRIM -8%
26	Invesco Ltd.	180,629180,629	$2M	0.25%	ADD 17%
27	DIMENSIONAL FUND ADVISORS LP	179,594179,594	$2M	0.25%	ADD 85%
28	Prosight Management, LP	174,800174,800	$2M	0.24%	NEW
29	Bank of New York Mellon Corp	166,246166,246	$2M	0.23%	—
30	Nuveen, LLC	154,201154,201	$2M	0.21%	—
31	JANE STREET GROUP, LLC	145,307145,307	$2M	0.20%	TRIM -69%
32	WELLS FARGO & COMPANY/MN	118,343118,343	$1M	0.16%	TRIM -28%
33	AMERIPRISE FINANCIAL INC	117,948117,948	$1M	0.16%	—
34	Ancora Advisors LLC	115,000115,000	$1M	0.16%	ADD 94%
35	HighTower Advisors, LLC	110,630110,630	$1M	0.15%	ADD 6%
36	ALLIANCEBERNSTEIN L.P.	66,99066,990	$1M	0.09%	TRIM -9%
37	PRICE T ROWE ASSOCIATES INC /MD/	107,293107,293	$1M	0.15%	ADD 12%
38	RHUMBLINE ADVISERS	102,818102,818	$1M	0.14%	ADD 3%
39	Susquehanna Portfolio Strategies, LLC	92,75992,759	$979,535	0.13%	—
40	Cambridge Investment Research Advisors, Inc.	88,56888,568	$935,000	0.12%	ADD 8%
41	MARSHALL WACE, LLP	83,68283,682	$883,682	0.12%	NEW
42	D. E. Shaw & Co., Inc.	71,16871,168	$751,534	0.10%	TRIM -91%
43	AMERICAN FINANCIAL GROUP INC	64,11364,113	$677,033	0.09%	—
44	Quantinno Capital Management LP	61,54161,541	$649,873	0.09%	ADD 145%
45	MINDSET WEALTH MANAGEMENT, LLC	59,50059,500	$628,320	0.08%	ADD 14%
46	MML INVESTORS SERVICES, LLC	57,67557,675	$609,048	0.08%	TRIM -26%
47	BNP PARIBAS FINANCIAL MARKETS	56,90856,908	$600,948	0.08%	ADD 248%
48	DEUTSCHE BANK AG\	55,03055,030	$581,117	0.08%	ADD 13%
49	COLDSTREAM CAPITAL MANAGEMENT INC	54,13054,130	$571,613	0.07%	—
50	Brevan Howard Capital Management LP	51,16351,163	$540,281	0.07%	TRIM -21%
51	Headlands Technologies LLC	49,92649,926	$527,219	0.07%	NEW
52	NFSG Corp	47,71047,710	$503,818	0.07%	ADD 39%
53	Focus Partners Wealth	47,58247,582	$502,467	0.07%	ADD 53%
54	BARCLAYS PLC	44,92244,922	$474,377	0.06%	TRIM -63%
55	Vanguard Global Advisers, LLC	41,12141,121	$434,238	0.06%	NEW
56	FIFTH THIRD BANCORP	39,00039,000	$411,840	0.05%	ADD 3800%
57	AXQ CAPITAL, LP	38,81538,815	$409,886	0.05%	ADD 33%
58	JPMORGAN CHASE & CO	41,72041,720	$409,273	0.06%	ADD 12%
59	MetLife Investment Management, LLC	38,63438,634	$407,975	0.05%	ADD 7%
60	GROUP ONE TRADING LLC	38,60438,604	$407,658	0.05%	TRIM -71%
61	Optimize Financial Inc	38,40738,407	$405,578	0.05%	NEW
62	NOMURA HOLDINGS INC	38,23738,237	$403,783	0.05%	TRIM -94%
63	SIMPLEX TRADING, LLC	37,52637,526	$396,274	0.05%	TRIM -70%
64	Walleye Capital LLC	34,53334,533	$364,668	0.05%	TRIM -69%
65	ACADIAN ASSET MANAGEMENT LLC	32,77832,778	$345,000	0.05%	NEW
66	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	31,70131,701	$334,763	0.04%	ADD 4%
67	Cerity Partners LLC	31,58631,586	$333,548	0.04%	ADD 4%
68	CITIGROUP INC	30,79030,790	$325,143	0.04%	ADD 12%
69	AQR CAPITAL MANAGEMENT LLC	30,17830,178	$318,679	0.04%	ADD 32%
70	Diametric Capital, LP	29,32229,322	$309,640	0.04%	NEW
71	Balyasny Asset Management L.P.	29,08329,083	$307,116	0.04%	NEW
72	Vontobel Holding Ltd.	28,45028,450	$300,432	0.04%	ADD 422%
73	BRIDGEWAY CAPITAL MANAGEMENT, LLC	27,00027,000	$285,120	0.04%	TRIM -52%
74	Merit Financial Group, LLC	26,99326,993	$285,046	0.04%	NEW
75	Virtus Investment Advisers, LLC	26,86526,865	$283,694	0.04%	ADD 2%
76	GSA CAPITAL PARTNERS LLP	23,96723,967	$253,000	0.03%	NEW
77	FARALLON CAPITAL MANAGEMENT LLC	23,00023,000	$242,880	0.03%	—
78	Stordahl Capital Management, Inc.	22,86022,860	$241,402	0.03%	—
79	HARBOUR INVESTMENTS, INC.	22,02522,025	$232,584	0.03%	—
80	Avantax Planning Partners, Inc.	21,10021,100	$222,816	0.03%	ADD 60%
81	Creative Planning	21,04721,047	$222,256	0.03%	ADD 24%
82	NEW YORK STATE COMMON RETIREMENT FUND	20,71320,713	$218,729	0.03%	—
83	PROFUND ADVISORS LLC	20,64720,647	$218,032	0.03%	ADD 44%
84	LPL Financial LLC	19,60819,608	$207,060	0.03%	NEW
85	China Universal Asset Management Co., Ltd.	18,98218,982	$200,450	0.03%	ADD 15%
86	FMR LLC	18,67718,677	$197,225	0.03%	ADD 3%
87	MANUFACTURERS LIFE INSURANCE COMPANY, THE	18,45418,454	$194,874	0.03%	TRIM -7%
88	INTECH INVESTMENT MANAGEMENT LLC	18,27618,276	$192,995	0.03%	TRIM -39%
89	Apella Capital, LLC	14,28814,288	$192,031	0.02%	—
90	WEALTH ENHANCEMENT ADVISORY SERVICES, LLC	17,47517,475	$190,478	0.02%	TRIM -45%
91	Breakwater Investment Management	17,04817,048	$180,027	0.02%	—
92	Police & Firemen's Retirement System of New Jersey	16,36016,360	$172,762	0.02%	—
93	XTX Topco Ltd	15,25115,251	$161,051	0.02%	NEW
94	nVerses Capital, LLC	14,40414,404	$152,106	0.02%	NEW
95	Russell Investments Group, Ltd.	13,99813,998	$147,818	0.02%	—
96	CANADA PENSION PLAN INVESTMENT BOARD	13,90013,900	$146,784	0.02%	TRIM -36%
97	SEI INVESTMENTS CO	13,17113,171	$139,100	0.02%	TRIM -59%
98	ProShare Advisors LLC	13,11813,118	$138,526	0.02%	TRIM -14%
99	PRUDENTIAL FINANCIAL INC	12,90512,905	$136,277	0.02%	NEW
100	Rafferty Asset Management, LLC	12,29812,298	$129,867	0.02%	—

† a filer this large appearing as NEW usually reflects a renamed or succeeded filing entity (the old name stops filing the same quarter) — not a brand-new position.

Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.

Holder trends· top 15 holders · shares held over 6 quarters

green added · red trimmed

Holder

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

BlackRock, Inc.

4.3M

4.4M

4.1M

4.5M

5.1M

5.3M

$56M

INGALLS & SNYDER LLC

4.0M

4.1M

3.4M

3.6M

$38M

VANGUARD CAPITAL MANAGEMENT LLC

—

3.0M

$32M

UBS Group AG

849K

661K

869K

709K

2.2M

2.3M

$25M

STATE STREET CORP

1.2M

1.4M

1.2M

1.6M

1.9M

$20M

STIFEL FINANCIAL CORP

1.6M

1.5M

1.8M

$19M

GEODE CAPITAL MANAGEMENT, LLC

1.3M

1.4M

1.5M

1.6M

1.8M

$19M

Corient Private Wealth LLC

733K

720K

531K

609K

1.4M

801K

$8M

VANGUARD PORTFOLIO MANAGEMENT LLC

—

719K

$8M

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

476K

464K

480K

553K

593K

583K

$6M

BANK OF MONTREAL /CAN/

563K

571K

563K

602K

568K

$6M

NORTHERN TRUST CORP

510K

485K

536K

527K

564K

$6M

VANGUARD FIDUCIARY TRUST CO

—

492K

$5M

SUSQUEHANNA INTERNATIONAL GROUP, LLP

76K

216K

116K

111K

742K

485K

$5M

MILLENNIUM MANAGEMENT LLC

86K

315K

269K

402K

442K

411K

$4M

Shares reported each quarter by the largest current holders. Green = added vs the prior filing, red = trimmed, grey = roughly held; a dash is a quarter with no 13F on file (a gap is skipped, not read as an exit). 13F is filed up to 45 days after quarter-end. Up to 40 quarters (10 years) available — use the selector above.

Institutional footprint by quarter

Line breaks are honest gaps — quarters with no 13F record, or a suppressed % — never interpolated. % of shares outstanding uses today's share count for every quarter (the only count stored).

Quarter	Holders	Shares held	% shares out	Value held
2026-Q1	160	30,812,988	42.6%	$326M
2025-Q4

Short interest has its own tab now — open SI →

Source: SEC Form 13F — every institution manager (≥ $100M in 13F securities) reporting a long US-listed position, across ~10,250 filers over 10 years of history. 13F is long-only, US-listed, filed up to 45 days after quarter-end.

Activists & large holders· Schedule 13D/G beneficial owners · OMER

Large holders — 13G, passive (top 2 by % of class)

Holder	% of class	Type	As of
INGALLS & SNYDER LLC	4.8%	QII	2025-12-31	SEC →
VANGUARD GROUP INC	0%	QII	2026-03-13	SEC →

Source: SEC Schedule 13D/13G structured XML. 13D = active intent; 13G filers report passively (Rule 13d-1(b) QII / 13d-1(c) Passive / 13d-1(d) Exempt) and are not activists. Percent and delta are the group aggregate the filing reports. Structured 13D/G coverage begins December 2024 (SEC XML mandate).

Institutional ownership· 13F filers holding OMER · 2026-Q1 methodology → sources →

160 holders

% of shares outstanding held

42.6%

Shares held (13F)

30,812,988

Reporting holders

160

Top holders

largest 100 of 160 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	BlackRock, Inc.	5,309,6265.3M	$56M	7.34%	ADD 5%
2	INGALLS & SNYDER LLC	3,559,4233.6M	$38M	4.92%	ADD 3%
3	VANGUARD CAPITAL MANAGEMENT LLC	2,983,2593.0M	$32M	4.12%	NEW†
4	UBS Group AG	2,340,7312.3M	$25M	3.23%	ADD 5%
5	STATE STREET CORP	1,919,5751.9M	$20M	2.65%	ADD 22%
6	STIFEL FINANCIAL CORP	1,831,5851.8M	$19M	2.53%	—
7	GEODE CAPITAL MANAGEMENT, LLC	1,752,3231.8M	$19M	2.42%	ADD 7%
8	Corient Private Wealth LLC	801,411801,411	$8M	1.11%	TRIM -42%
9	VANGUARD PORTFOLIO MANAGEMENT LLC	718,675718,675	$8M	0.99%	NEW
10	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	582,512582,512	$6M	0.80%	—
11	BANK OF MONTREAL /CAN/	568,426568,426	$6M	0.79%	TRIM -6%
12	NORTHERN TRUST CORP	563,867563,867	$6M	0.78%	ADD 7%
13	VANGUARD FIDUCIARY TRUST CO	492,345492,345	$5M	0.68%	NEW
14	SUSQUEHANNA INTERNATIONAL GROUP, LLP	485,030485,030	$5M	0.67%	TRIM -35%
15	MILLENNIUM MANAGEMENT LLC	410,609410,609	$4M	0.57%	TRIM -7%
16	MORGAN STANLEY	317,892317,892	$3M	0.44%	TRIM -18%
17	Clutterbuck Capital Management LLC	300,000300,000	$3M	0.41%	ADD 100%
18	TWO SIGMA INVESTMENTS, LP	286,474286,474	$3M	0.40%	TRIM -45%
19	Badgley Phelps Wealth Managers, LLC	263,556263,556	$3M	0.36%	—
20	CITADEL ADVISORS LLC	260,048260,048	$3M	0.36%	ADD 8%
21	BANK OF AMERICA CORP /DE/	204,805204,805	$2M	0.28%	ADD 78%
22	GOLDMAN SACHS GROUP INC	202,893202,893	$2M	0.28%	TRIM -11%
23	Polar Asset Management Partners Inc.	200,000200,000	$2M	0.28%	ADD 191%
24	Jump Financial, LLC	195,824195,824	$2M	0.27%	TRIM -14%
25	WELLINGTON MANAGEMENT GROUP LLP	187,300187,300	$2M	0.26%	TRIM -8%
26	Invesco Ltd.	180,629180,629	$2M	0.25%	ADD 17%
27	DIMENSIONAL FUND ADVISORS LP	179,594179,594	$2M	0.25%	ADD 85%
28	Prosight Management, LP	174,800174,800	$2M	0.24%	NEW
29	Bank of New York Mellon Corp	166,246166,246	$2M	0.23%	—
30	Nuveen, LLC	154,201154,201	$2M	0.21%	—
31	JANE STREET GROUP, LLC	145,307145,307	$2M	0.20%	TRIM -69%
32	WELLS FARGO & COMPANY/MN	118,343118,343	$1M	0.16%	TRIM -28%
33	AMERIPRISE FINANCIAL INC	117,948117,948	$1M	0.16%	—
34	Ancora Advisors LLC	115,000115,000	$1M	0.16%	ADD 94%
35	HighTower Advisors, LLC	110,630110,630	$1M	0.15%	ADD 6%
36	ALLIANCEBERNSTEIN L.P.	66,99066,990	$1M	0.09%	TRIM -9%
37	PRICE T ROWE ASSOCIATES INC /MD/	107,293107,293	$1M	0.15%	ADD 12%
38	RHUMBLINE ADVISERS	102,818102,818	$1M	0.14%	ADD 3%
39	Susquehanna Portfolio Strategies, LLC	92,75992,759	$979,535	0.13%	—
40	Cambridge Investment Research Advisors, Inc.	88,56888,568	$935,000	0.12%	ADD 8%
41	MARSHALL WACE, LLP	83,68283,682	$883,682	0.12%	NEW
42	D. E. Shaw & Co., Inc.	71,16871,168	$751,534	0.10%	TRIM -91%
43	AMERICAN FINANCIAL GROUP INC	64,11364,113	$677,033	0.09%	—
44	Quantinno Capital Management LP	61,54161,541	$649,873	0.09%	ADD 145%
45	MINDSET WEALTH MANAGEMENT, LLC	59,50059,500	$628,320	0.08%	ADD 14%
46	MML INVESTORS SERVICES, LLC	57,67557,675	$609,048	0.08%	TRIM -26%
47	BNP PARIBAS FINANCIAL MARKETS	56,90856,908	$600,948	0.08%	ADD 248%
48	DEUTSCHE BANK AG\	55,03055,030	$581,117	0.08%	ADD 13%
49	COLDSTREAM CAPITAL MANAGEMENT INC	54,13054,130	$571,613	0.07%	—
50	Brevan Howard Capital Management LP	51,16351,163	$540,281	0.07%	TRIM -21%
51	Headlands Technologies LLC	49,92649,926	$527,219	0.07%	NEW
52	NFSG Corp	47,71047,710	$503,818	0.07%	ADD 39%
53	Focus Partners Wealth	47,58247,582	$502,467	0.07%	ADD 53%
54	BARCLAYS PLC	44,92244,922	$474,377	0.06%	TRIM -63%
55	Vanguard Global Advisers, LLC	41,12141,121	$434,238	0.06%	NEW
56	FIFTH THIRD BANCORP	39,00039,000	$411,840	0.05%	ADD 3800%
57	AXQ CAPITAL, LP	38,81538,815	$409,886	0.05%	ADD 33%
58	JPMORGAN CHASE & CO	41,72041,720	$409,273	0.06%	ADD 12%
59	MetLife Investment Management, LLC	38,63438,634	$407,975	0.05%	ADD 7%
60	GROUP ONE TRADING LLC	38,60438,604	$407,658	0.05%	TRIM -71%
61	Optimize Financial Inc	38,40738,407	$405,578	0.05%	NEW
62	NOMURA HOLDINGS INC	38,23738,237	$403,783	0.05%	TRIM -94%
63	SIMPLEX TRADING, LLC	37,52637,526	$396,274	0.05%	TRIM -70%
64	Walleye Capital LLC	34,53334,533	$364,668	0.05%	TRIM -69%
65	ACADIAN ASSET MANAGEMENT LLC	32,77832,778	$345,000	0.05%	NEW
66	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	31,70131,701	$334,763	0.04%	ADD 4%
67	Cerity Partners LLC	31,58631,586	$333,548	0.04%	ADD 4%
68	CITIGROUP INC	30,79030,790	$325,143	0.04%	ADD 12%
69	AQR CAPITAL MANAGEMENT LLC	30,17830,178	$318,679	0.04%	ADD 32%
70	Diametric Capital, LP	29,32229,322	$309,640	0.04%	NEW
71	Balyasny Asset Management L.P.	29,08329,083	$307,116	0.04%	NEW
72	Vontobel Holding Ltd.	28,45028,450	$300,432	0.04%	ADD 422%
73	BRIDGEWAY CAPITAL MANAGEMENT, LLC	27,00027,000	$285,120	0.04%	TRIM -52%
74	Merit Financial Group, LLC	26,99326,993	$285,046	0.04%	NEW
75	Virtus Investment Advisers, LLC	26,86526,865	$283,694	0.04%	ADD 2%
76	GSA CAPITAL PARTNERS LLP	23,96723,967	$253,000	0.03%	NEW
77	FARALLON CAPITAL MANAGEMENT LLC	23,00023,000	$242,880	0.03%	—
78	Stordahl Capital Management, Inc.	22,86022,860	$241,402	0.03%	—
79	HARBOUR INVESTMENTS, INC.	22,02522,025	$232,584	0.03%	—
80	Avantax Planning Partners, Inc.	21,10021,100	$222,816	0.03%	ADD 60%
81	Creative Planning	21,04721,047	$222,256	0.03%	ADD 24%
82	NEW YORK STATE COMMON RETIREMENT FUND	20,71320,713	$218,729	0.03%	—
83	PROFUND ADVISORS LLC	20,64720,647	$218,032	0.03%	ADD 44%
84	LPL Financial LLC	19,60819,608	$207,060	0.03%	NEW
85	China Universal Asset Management Co., Ltd.	18,98218,982	$200,450	0.03%	ADD 15%
86	FMR LLC	18,67718,677	$197,225	0.03%	ADD 3%
87	MANUFACTURERS LIFE INSURANCE COMPANY, THE	18,45418,454	$194,874	0.03%	TRIM -7%
88	INTECH INVESTMENT MANAGEMENT LLC	18,27618,276	$192,995	0.03%	TRIM -39%
89	Apella Capital, LLC	14,28814,288	$192,031	0.02%	—
90	WEALTH ENHANCEMENT ADVISORY SERVICES, LLC	17,47517,475	$190,478	0.02%	TRIM -45%
91	Breakwater Investment Management	17,04817,048	$180,027	0.02%	—
92	Police & Firemen's Retirement System of New Jersey	16,36016,360	$172,762	0.02%	—
93	XTX Topco Ltd	15,25115,251	$161,051	0.02%	NEW
94	nVerses Capital, LLC	14,40414,404	$152,106	0.02%	NEW
95	Russell Investments Group, Ltd.	13,99813,998	$147,818	0.02%	—
96	CANADA PENSION PLAN INVESTMENT BOARD	13,90013,900	$146,784	0.02%	TRIM -36%
97	SEI INVESTMENTS CO	13,17113,171	$139,100	0.02%	TRIM -59%
98	ProShare Advisors LLC	13,11813,118	$138,526	0.02%	TRIM -14%
99	PRUDENTIAL FINANCIAL INC	12,90512,905	$136,277	0.02%	NEW
100	Rafferty Asset Management, LLC	12,29812,298	$129,867	0.02%	—

† a filer this large appearing as NEW usually reflects a renamed or succeeded filing entity (the old name stops filing the same quarter) — not a brand-new position.

Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.

Holder trends· top 15 holders · shares held over 6 quarters

green added · red trimmed

Holder

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

BlackRock, Inc.

4.3M

4.4M

4.1M

4.5M

5.1M

5.3M

$56M

INGALLS & SNYDER LLC

4.0M

4.1M

3.4M

3.6M

$38M

VANGUARD CAPITAL MANAGEMENT LLC

—

3.0M

$32M

UBS Group AG

849K

661K

869K

709K

2.2M

2.3M

$25M

STATE STREET CORP

1.2M

1.4M

1.2M

1.6M

1.9M

$20M

STIFEL FINANCIAL CORP

1.6M

1.5M

1.8M

$19M

GEODE CAPITAL MANAGEMENT, LLC

1.3M

1.4M

1.5M

1.6M

1.8M

$19M

Corient Private Wealth LLC

733K

720K

531K

609K

1.4M

801K

$8M

VANGUARD PORTFOLIO MANAGEMENT LLC

—

719K

$8M

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

476K

464K

480K

553K

593K

583K

$6M

BANK OF MONTREAL /CAN/

563K

571K

563K

602K

568K

$6M

NORTHERN TRUST CORP

510K

485K

536K

527K

564K

$6M

VANGUARD FIDUCIARY TRUST CO

—

492K

$5M

SUSQUEHANNA INTERNATIONAL GROUP, LLP

76K

216K

116K

111K

742K

485K

$5M

MILLENNIUM MANAGEMENT LLC

86K

315K

269K

402K

442K

411K

$4M

Institutional footprint by quarter

Line breaks are honest gaps — quarters with no 13F record, or a suppressed % — never interpolated. % of shares outstanding uses today's share count for every quarter (the only count stored).

Quarter	Holders	Shares held	% shares out	Value held
2026-Q1	160	30,812,988	42.6%	$326M
2025-Q4

Short interest has its own tab now — open SI →

Activists & large holders· Schedule 13D/G beneficial owners · OMER

Large holders — 13G, passive (top 2 by % of class)

Holder	% of class	Type	As of
INGALLS & SNYDER LLC	4.8%	QII	2025-12-31	SEC →
VANGUARD GROUP INC	0%	QII	2026-03-13	SEC →

OMER US Equity☆

Institutional ownership· 13F filers holding OMER · 2026-Q1 methodology → sources →

Top holders

Holder trends· top 15 holders · shares held over 6 quarters

Institutional footprint by quarter

Activists & large holders· Schedule 13D/G beneficial owners · OMER

Institutional ownership· 13F filers holding OMER · 2026-Q1 methodology → sources →

Top holders

Holder trends· top 15 holders · shares held over 6 quarters

Institutional footprint by quarter

Activists & large holders· Schedule 13D/G beneficial owners · OMER

OMER US Equity