Security Snapshot

OMEROS CORP - COMMON STOCK (OMER) Institutional Ownership

CUSIP: 682143102

13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026

Latest Period

Q1 2026

Institutions Reporting

158

Shares (Excl. Options)

30,745,988

Price

$10.56

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Type / Class
Equity / COMMON STOCK
Symbol
OMER on Nasdaq
Shares outstanding
72,213,917
Price per share
$14.56
All holders as of 31 Mar 2026
Q1 2026
Total 13F shares
30,745,988
Total reported value
$324,710,231
% of total 13F portfolios
0%
Share change
-1,698,105
Value change
-$23,018,991
Number of holders
158
Price from insider filings
$14.56
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Key facts

  • OMER - OMEROS CORP - COMMON STOCK is tracked under CUSIP 682143102.
  • 158 institutions reported positions in Q1 2026.
  • 1 significant owner is listed from Schedule 13D/13G reporting.

Change

  • Holder count moved from 151 to 158 between Q4 2025 and Q1 2026.
  • Reported value moved from $570,206,725 to $324,710,231.

Research use

  • You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
  • 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Evidence

Source: SEC Form 13F

Latest holder context comes from 158 institutions filings for Q1 2026.

Open SEC Evidence

Security key

682143102

Latest holder period

Q1 2026

13F holders

158

13D/G owners

1

CIK / CUSIP context first

Open Q1 2026 holders OMER full holder history OMEROS CORP SEC filings OMEROS CORP company facts OMEROS CORP insider transactions

Broader feeds

Latest 13F filings Latest 13D/G filings All securities

Significant Owners of OMEROS CORP - COMMON STOCK (OMER) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
INGALLS & SNYDER LLC 4.8% -34% $36,604,830 -$7,339,905 3,466,268 -17% INGALLS & SNYDER LLC 31 Dec 2025

As of 31 Mar 2026, 158 institutional investors reported holding 30,745,988 shares of OMEROS CORP - COMMON STOCK (OMER). This represents 43% of the company’s total 72,213,917 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of OMEROS CORP - COMMON STOCK (OMER) together control 37% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
BlackRock, Inc. 7.4% 5,309,626 +4.9% 0% $56,069,647
INGALLS & SNYDER LLC 4.9% 3,559,423 +3.2% 1.3% $37,588,000
VANGUARD CAPITAL MANAGEMENT LLC 4.1% 2,983,259 0% 0% $31,503,215
UBS Group AG 3.2% 2,340,731 +5.3% 0% $24,718,119
STATE STREET CORP 2.7% 1,919,575 +22% 0% $20,270,712
STIFEL FINANCIAL CORP 2.5% 1,831,585 +1.2% 0.02% $19,341,544
GEODE CAPITAL MANAGEMENT, LLC 2.4% 1,752,323 +7.4% 0% $18,509,126
Corient Private Wealth LLC 1.1% 801,411 +16% 0.01% $8,462,901
VANGUARD PORTFOLIO MANAGEMENT LLC 1% 718,675 0% 0% $7,589,208
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.81% 582,512 -1.8% 0% $6,151,327
BANK OF MONTREAL /CAN/ 0.79% 568,426 -5.5% 0% $6,002,578
NORTHERN TRUST CORP 0.78% 563,867 +7.1% 0% $5,954,435
VANGUARD FIDUCIARY TRUST CO 0.68% 492,345 0% 0% $5,199,163
SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.67% 485,030 -35% 0.01% $5,121,917
MILLENNIUM MANAGEMENT LLC 0.57% 410,609 -7.1% 0% $4,336,031
MORGAN STANLEY 0.44% 317,892 -18% 0% $3,356,940
Clutterbuck Capital Management LLC 0.42% 300,000 +100% 1.9% $3,168,000
TWO SIGMA INVESTMENTS, LP 0.4% 286,474 -45% 0% $3,025,165
Badgley Phelps Wealth Managers, LLC 0.36% 263,556 0% 0.06% $2,783,152
CITADEL ADVISORS LLC 0.36% 260,048 +8.2% 0% $2,746,107
BANK OF AMERICA CORP /DE/ 0.28% 204,805 +78% 0% $2,162,741
GOLDMAN SACHS GROUP INC 0.28% 202,893 -11% 0% $2,142,550
Polar Asset Management Partners Inc. 0.28% 200,000 +191% 0.05% $2,112,000
Jump Financial, LLC 0.27% 195,824 -14% 0.03% $2,067,901
WELLINGTON MANAGEMENT GROUP LLP 0.26% 187,300 -7.6% 0% $1,977,887

Institutional Holders of OMEROS CORP - COMMON STOCK (OMER) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q1 30,745,988 $324,710,231 -$23,018,991 $10.56 158
2025 Q4 33,208,453 $570,206,725 +$6,800,930 $17.18 151
2025 Q3 32,836,318 $134,581,239 +$15,288,802 $4.10 131
2025 Q2 29,070,740 $87,223,943 +$2,273,539 $3.00 125
2025 Q1 27,567,515 $226,581,675 +$7,577,920 $8.22 136
2024 Q4 26,557,460 $262,301,855 +$14,547,060 $9.88 128
2024 Q3 25,028,393 $99,334,168 +$134,504 $3.97 108
2024 Q2 24,952,386 $101,360,144 -$1,926,321 $4.06 104
2024 Q1 25,442,708 $87,800,583 +$1,744,044 $3.45 99
2023 Q4 24,934,579 $81,671,960 -$6,212,868 $3.27 97
2023 Q3 26,962,290 $78,889,421 -$548,505 $2.92 99
2023 Q2 26,218,040 $142,820,753 +$31,895,859 $5.44 103
2023 Q1 20,410,989 $94,907,120 +$6,264,086 $4.65 90
2022 Q4 18,940,581 $42,804,746 -$2,530,643 $2.26 94
2022 Q3 20,467,966 $64,677,945 -$9,768,089 $3.15 88
2022 Q2 23,156,221 $63,878,574 -$18,491,343 $2.75 93
2022 Q1 28,773,729 $173,191,574 -$11,338,842 $6.01 126
2021 Q4 29,895,672 $192,479,545 -$15,061,374 $6.43 128
2021 Q3 29,738,972 $411,859,511 -$25,783,157 $13.79 137
2021 Q2 32,206,918 $478,330,095 -$40,537,441 $14.84 146
2021 Q1 34,754,657 $618,556,571 +$9,528,433 $17.80 148
2020 Q4 34,309,690 $491,009,495 -$7,202,867 $14.28 130
2020 Q3 34,911,239 $353,094,849 +$28,000,378 $10.10 133
2020 Q2 31,800,513 $467,894,511 +$8,008,700 $14.72 115
2020 Q1 31,179,601 $416,709,433 +$46,931,533 $13.37 119
2019 Q4 27,755,990 $391,090,927 +$23,145,208 $14.09 122
2019 Q3 25,975,517 $424,133,856 -$3,132,519 $16.33 110
2019 Q2 26,198,649 $410,992,237 +$15,502,325 $15.69 110
2019 Q1 25,414,081 $441,443,014 +$29,300,071 $17.37 113
2018 Q4 24,098,231 $268,536,926 -$12,225,923 $11.14 118
2018 Q3 23,232,569 $567,123,388 +$5,741,995 $24.41 123
2018 Q2 23,101,621 $419,070,764 +$24,598,063 $18.14 112
2018 Q1 22,103,294 $246,928,495 -$22,968,789 $11.17 108
2017 Q4 23,456,380 $455,771,987 -$13,390,842 $19.43 125
2017 Q3 23,988,052 $518,601,588 +$54,680,462 $21.62 108
2017 Q2 21,549,455 $428,965,835 +$35,741,791 $19.91 100
2017 Q1 19,767,505 $298,393,635 +$37,048,015 $15.12 97
2016 Q4 20,787,611 $206,216,429 -$10,538,972 $9.92 101
2016 Q3 23,681,893 $264,232,949 +$20,205,799 $11.16 97
2016 Q2 21,869,549 $230,117,146 +$22,657,733 $10.52 98
2016 Q1 19,105,703 $293,074,280 -$26,334,121 $15.34 98
2015 Q4 20,821,839 $327,468,858 -$10,455,325 $15.73 99
2015 Q3 21,499,016 $235,624,134 -$31,115,102 $10.96 102
2015 Q2 21,353,717 $384,137,368 +$3,507,947 $17.99 105
2015 Q1 20,682,656 $455,597,944 +$135,929,880 $22.03 100
2014 Q4 14,312,014 $354,299,409 +$35,801,814 $24.78 103
2014 Q3 12,831,228 $163,203,199 -$2,912,625 $12.72 84
2014 Q2 12,934,375 $225,046,474 +$19,184,296 $17.40 91
2014 Q1 12,171,676 $146,841,471 +$30,608,191 $12.07 83
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