OMER · Omeros Corp · Holdings
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.
Institutional Ownership Trend
Holder Concentration
Across 174 13F filersWho Holds OMER
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 171 filers, like-for-like change +16.7%; actively managed books +17.7%; index-like books +14.7%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 42.9% | 81 | +14.6% |
| Exempt adviser | 0.3% | 2 | -31.8% |
| Adviser | 3.7% | 3 | +351.3% |
| Bank | 20.9% | 17 | +24.4% |
| Insurer | 0.3% | 2 | +38.3% |
| Broker-dealer | 0.3% | 2 | +57.6% |
| Benefit plan | 0.4% | 2 | +775.0% |
| Non-US | 0.4% | 6 | +4.2% |
| Holding company | 19.0% | 7 | +12.2% |
| Unknown | 11.9% | 49 | -5.3% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 44.7% | 25 | +14.7% |
| Systematic-like | 3.0% | 10 | -23.1% |
| Concentrated | 1.0% | 23 | -22.2% |
| Diversified active | 50.0% | 112 | +23.0% |
| Unknown | 1.2% | 1 | +50.0% |
| Not measured | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 65.8% | 105 | +16.6% |
| Medium turnover | 15.5% | 29 | +52.3% |
| High turnover | 4.2% | 24 | -32.5% |
| Unknown | 14.4% | 13 | +12.7% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 15.3% | 22 | +8.3% |
| Medium horizon | 18.5% | 21 | +8.6% |
| Long horizon | 62.4% | 117 | +17.4% |
| Unknown | 3.8% | 11 | +168.8% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 3.0% | 29 | +10.2% |
| $1B to $10B | 15.4% | 42 | +18.7% |
| $10B to $100B | 8.0% | 45 | +63.0% |
| $100B or more | 73.6% | 55 | +13.0% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 4.6% | 42 | -2.8% |
| Pooled investment vehicles | 7.5% | 15 | +95.3% |
| Registered funds and BDCs | 19.2% | 11 | +7.4% |
| Pension and profit sharing plans | 0.0% | 1 | -69.4% |
| Insurance companies | 0.2% | 3 | +16.6% |
| Governments and sovereign funds | 0.3% | 1 | +7.2% |
| Corporations | 0.5% | 1 | +46.7% |
| Other investment advisers | 0.0% | 1 | 0.0% |
| Diversified | 0.5% | 5 | +48.3% |
| Unknown | 67.3% | 91 | +15.6% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 7.8% | 19 | +86.5% |
| Private equity funds | 0.3% | 3 | +7.5% |
| Real estate funds | 0.2% | 3 | +59.7% |
| Securitized asset funds | 0.1% | 1 | +9655.4% |
| Other private funds | 1.3% | 9 | -24.3% |
| Mixed private funds | 0.2% | 1 | 0.0% |
| Private funds, type not stated | 0.1% | 2 | -38.9% |
| No private funds | 22.9% | 44 | +7.8% |
| Venture capital funds | 0.0% | 0 | -100.0% |
| Unknown | 67.0% | 89 | +16.0% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 87.7% | 143 | +15.7% |
| Outside the US | 12.3% | 28 | +23.8% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 2 holders with no observed 2026-03-31 13F and 1 holder with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.
Conviction and Crowding
171 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 19.7% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies OMER's active holders also own, quarter ended Jun 30, 2026Shareholder Targets
13F filers that own its peers but not OMER, quarter ended Jun 30, 2026Found through its holder-overlap peers: TMUS, ICE, ACN, BA, PFE, ECNS, DHR, RTX, LLY, GOOGL, ISRG, SBUX, CVX, AMZN, AAPL, MSFT, UNH, JNJ, BAC, BRK-B. 7,147 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | NORGES BANK Non-US, Index-like | $243,971,080,481 18 held | GOOGL, AAPL, MSFT |
| 2 | Capital Research Global Investors Adviser, Diversified active | $180,220,123,128 17 held | GOOGL, MSFT, AMZN |
| 3 | Capital World Investors Adviser, Diversified active | $158,637,039,652 16 held | GOOGL, MSFT, LLY |
| 4 | Berkshire Hathaway Inc Insurer, Concentrated | $145,244,318,166 4 held | AAPL, GOOGL, BAC |
| 5 | LILLY ENDOWMENT INC Unknown, Unknown | $108,400,867,760 1 held | LLY |
| 6 | Amundi Holding company, Index-like | $96,666,755,510 19 held | AAPL, GOOGL, MSFT |
| 7 | FRANKLIN RESOURCES INC Adviser, Diversified active | $94,170,670,933 20 held | AAPL, MSFT, GOOGL |
| 8 | Capital International Investors Adviser, Diversified active | $88,765,129,638 15 held | GOOGL, MSFT, AAPL |
| 9 | Fisher Asset Management, LLC Adviser, Diversified active | $81,184,699,154 20 held | AAPL, GOOGL, MSFT |
| 10 | DIMENSIONAL FUND ADVISORS LP Registered adviser, Diversified active | $73,510,328,618 19 held | AAPL, MSFT, GOOGL |
Fund Ownership of OMER by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 14.54% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 3.37% | 2,437,755 |
| Index ETFs | 11.17% | 8,088,213 |
| Active ETFs | 0.37% | 265,330 |
| Active funds | 0.72% | 519,444 |
| Unclassified | 0.14% | 102,527 |
| All registered funds | 15.77% | 11,413,269 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega BlackRock, Inc. Holding company | $57,484,454 | 14.60% | 6,044,633 | Shares | 2026-08-07 | |
| Mid INGALLS & SNYDER LLC Registered adviser | $34,802,063 | 8.84% | 3,659,523 | Shares | 2026-08-14 | |
| Mega UBS Group AG Bank | $29,941,130 | 7.61% | 3,148,384 | Shares | 2026-08-13 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $29,215,195 | 7.42% | 3,072,050 | Shares | 2026-08-13 | |
| Mega STATE STREET CORP Bank | $22,062,306 | 5.60% | 2,319,906 | Shares | 2026-09-22 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $18,206,514 | 4.63% | 1,914,460 | Shares | 2026-08-12 | |
| Mega STIFEL FINANCIAL CORP | $17,469,155 | 4.44% | 1,836,925 | Shares | 2026-08-12 | |
| Mid Affinity Asset Advisors, LLC Registered adviser | $13,421,463 | 3.41% | 1,411,300 | Put | 2026-08-13 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $9,237,063 | 2.35% | 971,300 | Call | 2026-08-14 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $9,156,494 | 2.33% | 962,828 | Shares | 2026-08-13 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $8,736,837 | 2.22% | 918,700 | Put | 2026-08-14 | |
| Mega Invesco Ltd. Adviser | $7,149,338 | 1.82% | 751,771 | Shares | 2026-08-14 | |
| Mega NORTHERN TRUST CORP Bank | $6,917,077 | 1.76% | 727,348 | Shares | 2026-08-13 | |
| Mid Rock Springs Capital Management LP Registered adviser | $6,832,925 | 1.74% | 718,499 | Shares | 2026-08-14 | |
| Large Corient Private Wealth LLC Registered adviser | $6,274,032 | 1.59% | 659,730 | Shares | 2026-08-27 | |
| Large Rubric Capital Management LP Registered adviser | $6,246,871 | 1.59% | 656,874 | Shares | 2026-08-14 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $5,750,059 | 1.46% | 604,633 | Shares | 2026-08-14 | |
| Mega BANK OF MONTREAL /CAN/ Bank | $5,405,711 | 1.37% | 568,424 | Shares | 2026-08-12 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $4,671,055 | 1.19% | 491,173 | Shares | 2026-08-13 | |
| Large FEDERATED HERMES, INC. Adviser | $4,548,537 | 1.16% | 478,290 | Shares | 2026-08-12 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $4,507,740 | 1.15% | 474,000 | Call | 2026-09-02 | |
| Small Clutterbuck Capital Management LLC | $4,279,500 | 1.09% | 450,000 | Shares | 2026-08-10 | |
| Mega TWO SIGMA INVESTMENTS, LP Registered adviser | $3,829,315 | 0.97% | 402,662 | Shares | 2026-08-14 | |
| Mega MORGAN STANLEY Holding company | $3,751,300 | 0.95% | 394,459 | Shares | 2026-08-13 | |
| Large Caption Management, LLC Registered adviser | $3,462,591 | 0.88% | 364,100 | Put | 2026-08-14 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $3,269,908 | 0.83% | 343,839 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $3,092,594 | 0.79% | 325,194 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $2,571,504 | 0.65% | 270,400 | Put | 2026-09-02 | |
| Mid Badgley Phelps Wealth Managers, LLC Registered adviser | $2,506,417 | 0.64% | 263,556 | Shares | 2026-07-31 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP Holding company | $1,945,184 | 0.49% | 204,541 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $1,904,853 | 0.48% | 200,300 | Call | 2026-08-14 | |
| Mega Bank of New York Mellon Corp Bank | $1,863,863 | 0.47% | 195,990 | Shares | 2026-08-06 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $1,846,270 | 0.47% | 194,140 | Shares | 2026-08-14 | |
| Mega Nuveen, LLC | $1,616,242 | 0.41% | 169,952 | Shares | 2026-08-11 | |
| Mid Ancora Advisors LLC Registered adviser | $1,604,812 | 0.41% | 168,750 | Shares | 2026-08-14 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $1,493,145 | 0.38% | 157,008 | Shares | 2026-08-14 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $1,492,014 | 0.38% | 156,889 | Shares | 2026-08-14 | |
| Large LMR Partners LLP Exempt adviser | $1,384,656 | 0.35% | 145,600 | Put | 2026-08-14 | |
| Mega Swiss National Bank | $1,305,723 | 0.33% | 137,300 | Shares | 2026-08-11 | |
| Small Virtus Investment Advisers, LLC Registered adviser | $1,266,056 | 0.32% | 133,129 | Shares | 2026-08-11 | |
| Large Caption Management, LLC Registered adviser | $1,236,300 | 0.31% | 130,000 | Shares | 2026-08-14 | |
| Small MINDSET WEALTH MANAGEMENT, LLC Registered adviser | $1,235,696 | 0.31% | 64,900 | Shares | 2026-10-19 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $1,232,020 | 0.31% | 129,550 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $1,192,554 | 0.30% | 125,400 | Put | 2026-08-14 | |
| Large Caption Management, LLC Registered adviser | $1,145,004 | 0.29% | 120,400 | Call | 2026-08-14 | |
| Large MML INVESTORS SERVICES, LLC | $1,123,844 | 0.29% | 118,175 | Shares | 2026-08-07 | |
| Mega AMERIPRISE FINANCIAL INC Adviser | $1,117,006 | 0.28% | 117,456 | Shares | 2026-08-14 | |
| Mega HighTower Advisors, LLC Registered adviser | $1,097,149 | 0.28% | 115,368 | Shares | 2026-08-05 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $1,048,677 | 0.27% | 110,271 | Shares | 2026-08-12 | |
| Large PEAK6 LLC Broker-dealer | $951,000 | 0.24% | 100,000 | Call | 2026-08-13 | |
| Large Brevan Howard Capital Management LP Exempt adviser | $932,426 | 0.24% | 98,047 | Shares | 2026-08-14 | |
| Large Cambridge Investment Research Advisors, Inc. | $878,752 | 0.22% | 92,403 | Shares | 2026-07-30 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $813,998 | 0.21% | 85,594 | Shares | 2026-09-02 | |
| Mid COLDSTREAM CAPITAL MANAGEMENT INC Registered adviser | $805,905 | 0.20% | 84,743 | Shares | 2026-08-14 | |
| Large Quantinno Capital Management LP Registered adviser | $796,804 | 0.20% | 83,786 | Shares | 2026-08-13 | |
| Large Balyasny Asset Management L.P. Registered adviser | $794,636 | 0.20% | 83,558 | Shares | 2026-08-14 | |
| Large JUPITER ASSET MANAGEMENT LTD Registered adviser | $724,528 | 0.18% | 76,186 | Shares | 2026-08-10 | |
| Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Benefit plan | $720,192 | 0.18% | 75,730 | Shares | 2026-08-24 | |
| Mega DEUTSCHE BANK AG\ Non-US | $713,753 | 0.18% | 75,053 | Shares | 2026-08-07 | |
| Mega CITIGROUP INC Bank | $692,603 | 0.18% | 72,829 | Shares | 2026-08-03 | |
| Mega ALLIANCEBERNSTEIN L.P. Registered adviser | $637,074 | 0.16% | 66,990 | Shares | 2026-08-14 | |
| Small AMERICAN FINANCIAL GROUP INC Insurer | $609,714 | 0.15% | 64,113 | Shares | 2026-08-12 | |
| Large STATE OF WISCONSIN INVESTMENT BOARD Benefit plan | $573,823 | 0.15% | 60,339 | Shares | 2026-08-14 | |
| Large WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | $573,218 | 0.15% | 30,106 | Shares | 2026-10-13 | |
| Mid GROUP ONE TRADING LLC Broker-dealer | $558,208 | 0.14% | 58,697 | Shares | 2026-08-14 | |
| Mega Vanguard Global Advisers, LLC Registered adviser | $532,740 | 0.14% | 56,019 | Shares | 2026-08-13 | |
| Large Squarepoint Ops LLC Registered adviser | $523,335 | 0.13% | 55,030 | Shares | 2026-08-14 | |
| Large Walleye Capital LLC Registered adviser | $515,442 | 0.13% | 54,200 | Put | 2026-08-03 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser | $507,471 | 0.13% | 53,362 | Shares | 2026-08-13 | |
| Mega VANGUARD ASSET MANAGEMENT, Ltd | $454,283 | 0.12% | 47,769 | Shares | 2026-08-13 | |
| Mega BARCLAYS PLC Bank | $448,462 | 0.11% | 47,157 | Shares | 2026-08-14 | |
| Small Headlands Technologies LLC | $431,763 | 0.11% | 45,401 | Shares | 2026-08-13 | |
| Mega Legal & General Group Plc | $424,962 | 0.11% | 44,686 | Shares | 2026-08-14 | |
| Large MetLife Investment Management, LLC Registered adviser | $413,780 | 0.11% | 43,510 | Shares | 2026-08-14 | |
| Large Zurcher Kantonalbank (Zurich Cantonalbank) Non-US | $407,417 | 0.10% | 42,841 | Shares | 2026-08-12 | |
| Large PRUDENTIAL FINANCIAL INC Insurer | $403,081 | 0.10% | 42,385 | Shares | 2026-08-12 | |
| Mega JPMORGAN CHASE & CO Bank | $401,768 | 0.10% | 42,247 | Shares | 2026-08-12 | |
| Mid Susquehanna Portfolio Strategies, LLC | $397,090 | 0.10% | 41,755 | Shares | 2026-08-14 | |
| Mid INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC | $384,204 | 0.10% | 40,400 | Shares | 2026-07-22 | |
| Large Walleye Capital LLC Registered adviser | $381,351 | 0.10% | 40,100 | Call | 2026-08-03 | |
| Large FIFTH THIRD BANCORP Bank | $370,890 | 0.09% | 39,000 | Shares | 2026-08-05 | |
| Small Optimize Financial Inc Registered adviser | $363,985 | 0.09% | 38,274 | Shares | 2026-08-27 | |
| Small Sound Capital Solutions LLC | $363,985 | 0.09% | 38,274 | Shares | 2026-08-13 | |
| Large Cerity Partners LLC Registered adviser | $353,657 | 0.09% | 37,188 | Shares | 2026-08-14 | |
| Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $315,893 | 0.08% | 33,217 | Shares | 2026-08-14 | |
| Mega LPL Financial LLC Broker-dealer | $314,143 | 0.08% | 33,033 | Shares | 2026-08-07 | |
| Small Diametric Capital, LP | $313,925 | 0.08% | 33,010 | Shares | 2026-08-14 | |
| Small COMPASS FINANCIAL MANAGEMENT LLC Registered adviser | $312,070 | 0.08% | 32,815 | Shares | 2026-08-12 | |
| Large Focus Partners Wealth Registered adviser | $301,685 | 0.08% | 31,723 | Shares | 2026-08-12 | |
| Mid BRIGHTON JONES LLC Registered adviser | $300,487 | 0.08% | 31,597 | Shares | 2026-08-11 | |
| Mid Avantax Planning Partners, Inc. Registered adviser | $295,761 | 0.08% | 31,100 | Shares | 2026-07-28 | |
| Mega Jupiter Topco LLC | $290,055 | 0.07% | 30,500 | Shares | 2026-08-14 | |
| Mega Russell Investments Group, Ltd. | $287,981 | 0.07% | 30,282 | Shares | 2026-08-06 | |
| Mega AQR CAPITAL MANAGEMENT LLC Registered adviser | $282,692 | 0.07% | 29,726 | Shares | 2026-08-14 | |
| Mid Apella Capital, LLC | $272,043 | 0.07% | 14,288 | Shares | 2026-10-08 | |
| Small Breakwater Investment Management Registered adviser | $267,473 | 0.07% | 14,048 | Shares | 2026-10-20 | |
| Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC Registered adviser | $256,770 | 0.07% | 27,000 | Shares | 2026-08-14 | |
| Large Merit Financial Group, LLC Registered adviser | $255,247 | 0.06% | 26,840 | Shares | 2026-07-20 | |
| Mid PROFUND ADVISORS LLC Registered adviser | $250,293 | 0.06% | 26,319 | Shares | 2026-08-11 | |
| Mid Atom Investors LP Registered adviser | $227,716 | 0.06% | 23,945 | Shares | 2026-08-14 |
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