Omeros Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

Insider Trading Volume

Insider Buying: Insufficient data to determine if insiders have bought more shares than they have sold in the past 3 months.

Ownership Breakdown

What is the ownership structure of OMER?
Owner Type	Number of Shares	Ownership Percentage
Individual Insiders	2,699,886	3.81%
Institutions	32,956,784	46.5%
General Public	35,243,789	49.7%

Dilution of Shares: Shareholders have been diluted in the past year, with total shares outstanding growing by 22.3%.

Top Shareholders

Top 25 shareholders own 43.32% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
6.28%	BlackRock, Inc.	4,452,156	US$60.2m	9.9%	no data
5.79%	Ingalls & Snyder, LLC	4,106,598	US$55.6m	3.11%	2.18%
4.72%	The Vanguard Group, Inc.	3,346,958	US$45.3m	1.93%	no data
3.03%	Gregory Demopulos	2,150,931	US$29.1m	6.11%	no data
2.68%	Morgan Stanley	1,901,553	US$25.7m	58.2%	no data
2.56%	Stifel Asset Management Corp.	1,812,275	US$24.5m	19%	0.02%
2.17%	Geode Capital Management, LLC	1,535,371	US$20.8m	12.1%	no data
2.11%	Polar Asset Management Partners Inc.	1,498,586	US$20.3m	0%	0.96%
1.75%	State Street Global Advisors, Inc.	1,239,728	US$16.8m	3.3%	no data
1.42%	D. E. Shaw & Co., L.P.	1,005,235	US$13.6m	-39%	0.01%
1.32%	Two Sigma Investments, LP	933,314	US$12.6m	39.3%	0.02%
1%	UBS Asset Management AG	709,089	US$9.6m	-18.4%	no data
0.86%	Corient Private Wealth LLC	608,762	US$8.2m	14.7%	0.01%
0.82%	Two Sigma Advisers, LP	578,200	US$7.8m	36.8%	0.02%
0.79%	BMO Asset Management Corp.	563,095	US$7.6m	-1.4%	no data
0.78%	Charles Schwab Investment Management, Inc.	553,467	US$7.5m	15.4%	no data
0.76%	Northern Trust Global Investments	535,695	US$7.2m	10.5%	no data
0.7%	Royal Bank of Canada	497,676	US$6.7m	0.1%	no data
0.65%	Marshall Wace LLP	464,178	US$6.3m	-37.4%	0.01%
0.58%	JPMorgan Chase & Co.	412,075	US$5.6m	1,300%	no data
0.57%	Millennium Management LLC	401,814	US$5.4m	49.1%	no data
0.55%	Citadel Advisors LLC	393,228	US$5.3m	149%	no data
0.53%	Peter Demopulos	372,898	US$5.0m	0%	no data
0.49%	Renaissance Technologies LLC	344,500	US$4.7m	-9.98%	0.01%
0.42%	The Goldman Sachs Group, Inc.	295,666	US$4.0m	38.2%	no data

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2026/01/07 12:00
End of Day Share Price	2026/01/06 00:00
Earnings	2025/09/30
Annual Earnings	2024/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

Omeros Corporation is covered by 15 analysts. 4 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

Analyst	Institution
Gregory Harrison	BofA Global Research
Ritu Baral	Canaccord Genuity
Elemer Piros	Cantor Fitzgerald & Co.