Every new Washington business filing, every dayOmeros
Greg Demopulos, Principal
Omeros Corporation is a pharmaceutical company based in Seattle, Washington, focused on discovering and developing novel therapeutics. The company's website describes it as breaking the mold in the pharmaceutical industry through novel discovery, strategic translational research, and vigorous clinical programs. The site lists officers including Greg and Diana, matching the filing's principals Greg Demopulos and Diana Perkinson. The business operates from 201 Elliott Avenue West in Seattle, as confirmed by both the filing and website.
Filed November 26, 2025 · Seattle, WA · King County
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Washington Secretary of State (CCFS) · Entity 3329897 · Retrieved July 27, 2026
About Omeros
Omeros Corporation filed as a Washington corporation on November 26, 2025, with a principal address in Seattle, zip 98119, in King County. The filing lists 17 principals, including Greg Demopulos, Arnold C. Hanish, David Borges, Diana Perkinson, M.D., Leroy E. Hood, M.D., Ph.D., and others. The domain was registered on January 17, 1997, through GoDaddy, over 10,500 days before filing, and the modern WordPress site matched the filing name and address. We estimate annual revenue of $10 million to $50 million and over 100 employees, operating as a brick-and-mortar biotechnology firm. No annual report or EIN on file yet.
- Domain registered over 10,500 days before filing, through GoDaddy.
- Lists 17 principals, including multiple with M.D. or Ph.D. titles.
- Modern WordPress site confirmed matching filing name and address.
- We estimate revenue of $10M-$50M and over 100 employees.
- No annual report or EIN on file yet.
Compiled from the state record, the company's public web presence, and our own research; revenue, employee, and footprint figures are estimates, not verified financials. Updated August 23, 2026.
One of 14 new businesses registered in Seattle in November 2025, and the only pharmaceuticals business registered there that month.
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Filing Details
Verified Business Profile
Contact Information
Verified Website Profile
We matched this business to its website and pulled the domain's registration (WHOIS) record. Domain age is one of the strongest signals that a filing is a truly new business and not a re-filing or paperwork change.
Officers / Authorized Persons
Frequently Asked Questions
When was Omeros registered?
Omeros was registered as Corp on November 26, 2025 in Washington.
Where is Omeros located?
Omeros is based in Seattle, WA, 98119, in King County.
What type of business is Omeros?
Omeros is classified as a pharmaceuticals business (biotechnology).
Does Omeros have an EIN on file?
No EIN was found on file for Omeros at the time of registration.
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