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Omeros Corp
$10.37 -0.13 (-1.24%) At close · Jul 15
Market Cap
$670.56M
Shares
72,375,355

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.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 160
Total Value: $335,951,980
Total Shares: 31,819,899
Showing 1–100 of 170 holdings by value · page 1 of 2

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 160 13F filers
Top Holder
16.7%
Jun 2023 → Mar 2026 · range 11.9% – 18.0%
of institutional value
Top 5
50.6%
Jun 2023 → Mar 2026 · range 42.3% – 60.8%
of institutional value
Top 10
71.1%
Jun 2023 → Mar 2026 · range 62.0% – 77.8%
of institutional value
HHI
700
Jun 2023 → Mar 2026 · range 513 – 945
Broadly held
Showing 100 of 170
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1285819 CUSIP 682143102 13F (30d) 7 filings 7 filers Visit website Investor relations