Omeros Ownership

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

Recent Insider Transactions

NasdaqGM:OMER Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Role	Shares	Max Price
12 Jan 26	SellUS$381,600	David Borges	Individual		30,000	US$12.72

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	2,574,263	3.56%
Institutions	31,041,679	42.9%
General Public	38,759,413	53.6%

Dilution of Shares: Shareholders have been diluted in the past year, with total shares outstanding growing by 23.5%.

Top Shareholders

Top 25 shareholders own 39.79% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
7.34%	BlackRock, Inc.	5,309,626	US$49.3m	4.88%	no data
4.92%	Ingalls & Snyder, LLC	3,559,423	US$33.0m	2.69%	0.96%
4.12%	Vanguard Capital Management, LLC	2,983,259	US$27.7m	0%	no data
3.23%	UBS Asset Management AG	2,341,278	US$21.7m	5.31%	no data
2.65%	State Street Global Advisors, Inc.	1,919,575	US$17.8m	22%	no data
2.53%	Stifel Asset Management Corp.	1,831,585	US$17.0m	1.21%	0.01%
2.42%	Geode Capital Management, LLC	1,752,323	US$16.3m	7.42%	no data
2.03%	Gregory Demopulos	1,469,308	US$13.6m	-33%	no data
1.34%	Peter Demopulos	972,898	US$9.0m	161%	no data
1.11%	Corient Private Wealth LLC	801,411	US$7.4m	16.5%	0.01%
0.99%	Vanguard Portfolio Management, LLC	718,675	US$6.7m	0%	no data
0.8%	Charles Schwab Investment Management, Inc.	582,512	US$5.4m	-1.81%	no data
0.8%	Susquehanna International Group, LLP	577,789	US$5.4m	-30.8%	0.01%
0.79%	BMO Asset Management Corp.	568,426	US$5.3m	-5.52%	no data
0.78%	Northern Trust Global Investments	563,867	US$5.2m	7.05%	no data
0.68%	Vanguard Fiduciary Trust Company	492,345	US$4.6m	3.91%	no data
0.57%	Millennium Management LLC	410,609	US$3.8m	-7.06%	no data
0.41%	Clutterbuck Capital Management LLC	300,000	US$2.8m	100%	1.79%
0.4%	Two Sigma Investments, LP	286,474	US$2.7m	-45.4%	no data
0.36%	Highlands Residual Corporation	263,556	US$2.4m	0%	0.04%
0.36%	Citadel Advisors LLC	260,048	US$2.4m	8.19%	no data
0.32%	Morgan Stanley	234,944	US$2.2m	-24.4%	no data
0.28%	Bank of America Corporation	204,805	US$1.9m	92.1%	no data
0.28%	Polar Asset Management Partners Inc.	200,000	US$1.9m	191%	0.12%
0.27%	Leap Investments LP	194,604	US$1.8m	-14.7%	0.03%

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2026/07/06 05:54
End of Day Share Price	2026/07/02 00:00
Earnings	2026/03/31
Annual Earnings	2025/12/31

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. 3 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.