Filer Snapshot

OMEROS CORP

CIK 0001285819. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity type

Company

Total filings

772

Latest filing

27 May 2026

Industry

Pharmaceutical Preparations

Filing-backed research brief

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Largest parsed holding

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Populates from the latest parsed 13F information table.

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13D/G large stake

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Source: SEC Forms 3/4/5

4 filed on 27 May 2026 for CIK 0001285819.

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Identity 3 facts
Listed symbols
OMER on Nasdaq
Industry
Pharmaceutical Preparations (Office Of Life Sciences)
Business address
201 Elliott Avenue West, Seattle, WA, 98119
SEC filing record 2 facts
State of incorporation
WA
Fiscal year end
31 December

Filer intelligence

What SEC filings say about OMEROS CORP

A compact read of parsed XML filings. 13F, 13D/G, and Forms 3/4/5 are shown separately because they answer different ownership questions.

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SEC source mix

Counts show available parsed rows, not one combined ownership total.

No XML rows yet
13F portfolio No rows yet

Quarterly institutional portfolio holdings.

13D/G stakes No rows yet

Beneficial ownership and large-stake disclosures.

Forms 3/4/5 No rows yet

Officer, director, and 10% owner holdings or transactions.

No parsed ownership summary yet

We still show the SEC filing timeline below. The intelligence summary will populate when parsed 13F, 13D/G, or Forms 3/4/5 data exists for this CIK.

Latest update

What changed recently for OMEROS CORP

New fact period available

Latest financial period: Q1 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

13 May 2026

Page type

Company facts

Latest period

Q1 2026

SEC-backed company facts were refreshed from filings filed on 13 May 2026.

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Benchmark Context

Benchmark context for this company

OMEROS CORP has a source-backed company facts view where you can compare the latest reported metrics with its own recent history and with peer rankings for the same metric.

Compared with

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Why this is notable

Latest financial period: Q1 2026. That gives you a fresh baseline before you compare this company with peers.

  • Latest company facts filing date: 13 May 2026.
  • Peer comparisons stay conservative: same metric, compatible units, latest valid company row only.
  • Open the facts page first if you want the cleanest path to verification.

Benchmark context is only shown where the app has enough comparable SEC-backed data to keep the interpretation honest.

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SEC filing record

CIK 0001285819 filing coverage

Start with this filing record, then use the linked ownership pages when parsed 13F, 13D/G, Forms 3/4/5, or facts data exists for this CIK.

SEC filings
772
First seen
31 Mar 2004
Latest filing
27 May 2026
Entity
Company

Observed form types

4 144 10-Q 8-K ARS DEF 14A SCHEDULE 13G/A 10-K SCHEDULE 13G 424B5 +30 more

Primary evidence

Open SEC filing index OMEROS CORP SEC filings OMEROS CORP insider transactions OMEROS CORP company facts OMER holder history

Industry context: Pharmaceutical Preparations.

Latest Filings

Showing the latest 12 of 712 SEC filings for OMEROS CORP.

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4

FORM 4

Filing date
27 May 2026
Reporting date
22 May 2026
SEC evidence
Open document Open filing
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144 File 001-34475

144 filing

Filing date
22 May 2026
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
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ARS File 001-34475

ARS filing

Filing date
30 Apr 2026
Reporting date
31 Dec 2025
SEC evidence
Open document Open filing
Next action
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DEF 14A File 001-34475

DEF 14A filing

Filing date
30 Apr 2026
Reporting date
18 Jun 2026
Next action
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SCHEDULE 13G/A File 005-85273

SCHEDULE 13G/A filing

Filing date
23 Apr 2026
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
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SCHEDULE 13G/A File 005-85273

SCHEDULE 13G/A filing

Filing date
27 Mar 2026
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
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4

FORM 4

Filing date
20 Feb 2026
Reporting date
18 Feb 2026
SEC evidence
Open document Open filing
Next action
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SCHEDULE 13G File 005-85273

SCHEDULE 13G filing

Filing date
30 Jan 2026
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
Verify source filing
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