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OMEROS CORP (OMER) XNAS PHARMACEUTICAL PREPARATIONS Net insider selling (90d)
Latest OMER Insider Trades Omeros Corp is an inventive, commercial-stage biotechnology company that discovers and develops first-in-class protein and small-molecule therapeutics for large-market and orphan indications, with particular emphasis on complement-mediated diseases, cancers, and addictive or compulsive disorders. The company's clinical-stage development programs include: narsoplimab, its antibody targeting mannan-binding lectin-associated serine protease 2 (MASP-2), the effector enzyme of the lectin pathway of complement; OMS1029, its long-acting antibody targeting MASP-2; and OMS527, its phosphodiesterase 7 (PDE7) inhibitor program.
Headquarters SEATTLE, WA
Employees 175
Listed 2009
Exchange XNAS https://www.omeros.com SEC filings for OMER on EDGAR
90-Day SEC Filing Activity Form 4 transaction type Transactions Shares Total value Open-market sale 9 95,906 $1.78M Grant or award 11 1,345,000 Option exercise 22 191,812
OMER Insider Transactions (Form 4) 65 30 Form 4 filings on record, the earliest from Jun 27, 2025, newest first.
Date Insider Transaction Security Shares Price Value Aug 28, 2026 PC Peter B. Cancelmo - Officer Option exercise Common Stock 25,000
Recent OMER Form 8-K Filings 5
Recent OMER Form 144 Notices of Proposed Sale 3 A Form 144 is notice of an INTENDED sale, not a completed one. It often precedes the Form 4 that reports the trade actually happening.
Filed Filer Relationship Shares Market value Notice Aug 31, 2026 PETER CANCELMO Officer 25,000 $464K View on EDGAR Aug 28, 2026 PETER CANCELMO Officer
OMER Insider Trading - FAQ
What is the latest insider trade for OMER? OMEROS CORP (OMER) had 16 insider filings in the last 90 days, with the most recent on 2026-09-01. The full record for OMER runs to 30 Form 4 filings, the earliest from 2025-06-27. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
How many insiders are buying OMER stock? No insider purchases of OMER were filed in the last 90 days.
How many insiders are selling OMER stock? 9 insider sales of OMER were filed in the last 90 days, totaling $1.78M.
Where can I see OMER SEC filings (Form 4, 10-K, 10-Q, 8-K)? This page tracks OMER Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
How can I follow OMER insider buys? Create a free InsiderAlpha account and press Watch on this page to add OMER to your watchlist. A free account also opens the full scored daily plan with every past day and 3 months of price history. No card is required. Sign up at https://insideralpha.ai/register.
More Health Care Companies with Insider Activity Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
Related Companies - Recent Insider Activity What is SEC Form 4? The filing insiders must submit within two business days of a trade, and how to read its transaction codes. Track OMER insider activity as it files Real-time Form 4 alerts, AI-scored daily trade ideas and 10b5-1 plan flags.
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Market cap $1.26B
P/E ratio 10.60
Dividend yield -
Average volume 1.96M
52 week high $19.65
52 week low $3.94
Today's high $18.57
Today's low $17.42
Open $17.52
Volume 2.50M
Previous close $17.34
Shares outstanding 72.39M Market cap
$1.26B
175 employees
OMER Insider Sentiment - Last 90 Days Share of open-market insider dollar volume that was buying versus selling, from SEC Form 4 filings.
0% Buying 100% Selling
0 insider purchases totaling $0 against 9 sales totaling $1.78M.
Most-Active OMER Insiders - Last 90 Days 10 Dollar totals are shown for open-market purchases and sales only. Grants, option exercises, gifts and tax withholding are reported by share count because they are not trades at a market price.
Aug 28, 2026 PC Peter B. Cancelmo - Officer Open-market sale Common Stock 25,000 $18.65 $466K
Aug 31, 2026 PC Peter B. Cancelmo - Officer Open-market sale Common Stock 25,000 $18.54 $464K
Aug 28, 2026 PC Peter B. Cancelmo - Officer Option exercise Stock Option (Right to Buy) 25,000 $0.00 -
Aug 31, 2026 PC Peter B. Cancelmo - Officer Option exercise Stock Option (Right to Buy) 25,000 $0.00 -
Aug 26, 2026 AH Arnold C. Hanish - Director Option exercise Common Stock 5,000 $15.81 $79K
Aug 26, 2026 AH Arnold C. Hanish - Director Open-market sale Common Stock 5,000 $18.53 $93K
Aug 27, 2026 AH Arnold C. Hanish - Director Option exercise Common Stock 2,500 $15.81 $40K
Aug 27, 2026 AH Arnold C. Hanish - Director Option exercise Common Stock 7,500 $14.66 $110K
Aug 27, 2026 AH Arnold C. Hanish - Director Open-market sale Common Stock 5,000 $18.88 $94K
Aug 27, 2026 AH Arnold C. Hanish - Director Open-market sale Common Stock 5,000 $19.02 $95K
Aug 26, 2026 AH Arnold C. Hanish - Director Option exercise Stock Option (Right to Buy) 5,000 $0.00 -
Aug 27, 2026 AH Arnold C. Hanish - Director Option exercise Stock Option (Right to Buy) 2,500 $0.00 -
Aug 27, 2026 AH Arnold C. Hanish - Director Option exercise Stock Option (Right to Buy) 7,500 $0.00 -
Aug 21, 2026 DB David J. Borges - Officer Option exercise Common Stock 5,906 $3.93 $23K
Aug 21, 2026 DB David J. Borges - Officer Option exercise Common Stock 4,094 $2.94 $12K
Aug 21, 2026 DB David J. Borges - Officer Open-market sale Common Stock 10,000 $18.95 $190K
Aug 24, 2026 DB David J. Borges - Officer Option exercise Common Stock 906 $2.94 $3K
Aug 24, 2026 DB David J. Borges - Officer Open-market sale Common Stock 906 $19.10 $17K
Aug 21, 2026 DB David J. Borges - Officer Option exercise Stock Option (Right to Buy) 5,906 $0.00 -
Aug 21, 2026 DB David J. Borges - Officer Option exercise Stock Option (Right to Buy) 4,094 $0.00 -
Aug 24, 2026 DB David J. Borges - Officer Option exercise Stock Option (Right to Buy) 906 $0.00 -
Aug 20, 2026 TC Thomas J. Cable - Director Option exercise Common Stock 7,500 $2.00 $15K
Aug 20, 2026 TC Thomas J. Cable - Director Option exercise Common Stock 7,500 $3.93 $29K
Aug 20, 2026 TC Thomas J. Cable - Director Open-market sale Common Stock 15,000 $18.45 $277K
Aug 20, 2026 TC Thomas J. Cable - Director Option exercise Stock Option (Right to Buy) 7,500 $0.00 -
Aug 20, 2026 TC Thomas J. Cable - Director Option exercise Stock Option (Right to Buy) 7,500 $0.00 -
Aug 12, 2026 JS Joseph L. Schocken - Director Grant or award Stock Option (Right to Buy) 30,000 $0.00 -
Aug 13, 2026 DB David J. Borges - Officer Option exercise Common Stock 5,000 $3.93 $20K
Aug 13, 2026 DB David J. Borges - Officer Open-market sale Common Stock 5,000 $16.95 $85K
Aug 13, 2026 DB David J. Borges - Officer Option exercise Stock Option (Right to Buy) 5,000 $0.00 -
Jul 22, 2026 PC Peter B. Cancelmo - Officer Grant or award Stock Option (right to buy) 105,000 $0.00 -
Jul 22, 2026 DB David J. Borges - Officer Grant or award Stock Option (right to buy) 105,000 $0.00 -
Jun 18, 2026 RS Rajiv Shah - Director Grant or award Stock Option (Right to Buy) 15,000 $0.00 -
Jun 18, 2026 DP Diana T. Perkinson - Director Grant or award Stock Option (Right to Buy) 15,000 $0.00 -
Jun 18, 2026 AH Arnold C. Hanish - Director Grant or award Stock Option (Right to Buy) 15,000 $0.00 -
Jun 18, 2026 TC Thomas J. Cable - Director Grant or award Stock Option (Right to Buy) 15,000 $0.00 -
Jun 18, 2026 TB Thomas F. Bumol - Director Grant or award Stock Option (Right to Buy) 15,000 $0.00 -
May 22, 2026 TC Thomas J. Cable - Director Option exercise Common Stock 7,500 $10.84 $81K
May 22, 2026 TC Thomas J. Cable - Director Option exercise Stock Option (Right to Buy) 7,500 $0.00 -
May 22, 2026 TC Thomas J. Cable - Director Open-market sale Common Stock 7,500 $11.61 $87K
Jan 13, 2026 DB David J. Borges - Officer Option exercise Common stock 30,000 $3.06 $92K
Jan 12, 2026 DB David J. Borges - Officer Open-market sale Common stock 30,000 $12.72 $382K
Jan 13, 2026 DB David J. Borges - Officer Open-market sale Common stock 30,000 $12.31 $369K
Jan 13, 2026 DB David J. Borges - Officer Option exercise Stock Option (right to buy) 30,000 $0.00 -
Jun 30, 2025 DB David J. Borges - Officer Grant or award Stock Option (right to buy) 95,000 $0.00 -
Jun 30, 2025 PC Peter B. Cancelmo - Officer Grant or award Stock Option (right to buy) 100,000 $0.00 -
Jun 27, 2025 TC Thomas J. Cable - Director Grant or award Stock Option (Right to Buy) 15,000 $0.00 -
Jun 27, 2025 DP Diana T. Perkinson - Director Grant or award Stock Option (Right to Buy) 15,000 $0.00 -
Jun 27, 2025 RS Rajiv Shah - Director Grant or award Stock Option (Right to Buy) 15,000 $0.00 -
Jun 27, 2025 AH Arnold C. Hanish - Director Grant or award Stock Option (Right to Buy) 15,000 $0.00 -
Jun 27, 2025 TB Thomas F. Bumol - Director Grant or award Stock Option (Right to Buy) 15,000 $0.00 -
