Nasdaq · CIK 0001285819
OMER OMEROS CORP
Insider trading from SEC Form 4. Last filing 19 d ago. Close $19.83 on Oct 9, 2026, +384% from the 52-week low and -6% from the high.
In brief
OMEROS CORP (OMER) has 31 SEC Form 4 filings on file from 11 insiders, the latest filed on Sep 24, 2026. In the last 90 days insiders made 0 open-market buys worth $0 and 6 open-market sells worth $2.2M, net -$2.2M.
8 open-market trades have been scored at OMER. The newest: David J. Borges (VP, Finance & CAO) sold $419k of stock on Sep 22, 2026, filed Sep 24, 2026, scored 16 (weak), under a 10b5-1 plan. The largest of the 8 shown: Peter B Cancelmo (VP, General Counsel) sold $930k on Aug 28, 2026, scored 59 (moderate). 4 insiders sold within 14 days of each other around Aug 28, 2026.
12 Form 144 notices of planned sales are on file, the latest filed Sep 23, 2026.
Last 90 days
Price and insider trades, last year
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
Open-market buys and sells at OMEROS CORP, scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 16Weak | David J. Borges VP, Finance & CAO sell | $419k 20,000 shares | -200% | - | |
| 59Moderate | Peter B Cancelmo VP, General Counsel sell | $930k 50,000 shares | -198% | +362% from low-4% from high | |
| 49Moderate | Arnold C Hanish director sell | $282k 15,000 shares | -300% | +352% from low-6% from high | |
| 27Weak | David J. Borges VP, Finance & CAO sell | $207k 10,906 shares | -109% | +378% from low0% from high | |
| 39Weak | Thomas J. Cable director sell | $277k 15,000 shares | -30% | +362% from low0% from high | |
| 24Weak | David J. Borges VP, Finance & CAO sell | $85k 5,000 shares | -100% | +331% from low0% from high | |
| 0Weak | Thomas J. Cable director sell | $87k 7,500 shares | -18% | +286% from low-33% from high | |
| 42Moderate | David J. Borges VP, Finance & CAO sell | $751k 60,000 shares | -200% | +332% from low-25% from high |
Planned sales
Form 144 notices filed before a sale of restricted or control stock, newest first. The sale itself usually reaches a Form 4 within days. All planned sales
| Filed | Seller | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Sep 23, 2026 | DAVID BORGES Officer | 14,927 0.02% of outstanding | $314k | Sep 23, 2026 | $501k |
| Sep 22, 2026 | DAVID BORGES Officer | 10,000 0.01% of outstanding | $185k | Sep 22, 2026 | $292k |
| Aug 31, 2026 | PETER CANCELMO Officer | 25,000 0.03% of outstanding | $464k | Aug 31, 2026 | $466k |
| Aug 28, 2026 | PETER CANCELMO Officer | 25,000 0.03% of outstanding | $466k | Aug 28, 2026 | none |
| Aug 27, 2026 | ARNOLD HANISH Director | 10,000 0.01% of outstanding | $189k | Aug 27, 2026 | $94k |
| Aug 26, 2026 | ARNOLD HANISH Director | 5,000 0.01% of outstanding | $94k | Aug 26, 2026 | none |
| Aug 21, 2026 | DAVID BORGES Officer | 10,906 0.02% of outstanding | $203k | Aug 21, 2026 | $85k |
| Aug 20, 2026 | THOMAS CABLE Director | 15,000 0.02% of outstanding | $277k | Aug 20, 2026 | $87k |
| Aug 13, 2026 | DAVID BORGES Officer | 5,000 0.01% of outstanding | $69k | Aug 13, 2026 | none |
| May 22, 2026 | Thomas Cable Director | 7,500 0.01% of outstanding | $90k | May 22, 2026 | none |
| Jan 13, 2026 | DAVID J BORGES Officer | 30,000 0.04% of outstanding | $369k | Jan 13, 2026 | $382k |
| Jan 12, 2026 | DAVID J BORGES Officer | 30,000 0.04% of outstanding | $382k | Jan 12, 2026 | none |
Transactions
The newest 50 of 73 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 22, 2026 | David J. Borges VP, Finance & CAO | MOption exercise Common Stock10b5-1 | +5,000 | $3.93 | $20k | 5,000 | 19 d ago |
| Sep 22, 2026 | David J. Borges VP, Finance & CAO | MOption exercise Common Stock10b5-1 | +5,000 | $2.94 | $15k | 10,000 | 19 d ago |
| Sep 22, 2026 | David J. Borges VP, Finance & CAO | SOpen-market sale Common Stock10b5-1 | -10,000 | $20.95 | $210k | 0 | 19 d ago |
| Sep 23, 2026 | David J. Borges VP, Finance & CAO | MOption exercise Common Stock10b5-1 | +10,000 | $15.58 | $156k | 10,000 | 19 d ago |
| Sep 23, 2026 | David J. Borges VP, Finance & CAO | SOpen-market sale Common Stock10b5-1 | -10,000 | $20.95 | $210k | 0 | 19 d ago |
| Sep 22, 2026 | David J. Borges VP, Finance & CAO | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -5,000 | $0.00 | $0 | 4,094 | 19 d ago |
| Sep 22, 2026 | David J. Borges VP, Finance & CAO | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -5,000 | $0.00 | $0 | 15,000 | 19 d ago |
| Sep 23, 2026 | David J. Borges VP, Finance & CAO | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -10,000 | $0.00 | $0 | 5,000 | 19 d ago |
| Aug 28, 2026 | Peter B Cancelmo VP, General Counsel | MOption exercise Common Stock | +25,000 | $2.94 | $74k | 25,200 | 42 d ago |
| Aug 28, 2026 | Peter B Cancelmo VP, General Counsel | SOpen-market sale Common Stock | -25,000 | $18.65 | $466k | 200 | 42 d ago |
| Aug 31, 2026 | Peter B Cancelmo VP, General Counsel | MOption exercise Common Stock | +25,000 | $2.94 | $74k | 25,200 | 42 d ago |
| Aug 31, 2026 | Peter B Cancelmo VP, General Counsel | SOpen-market sale Common Stock | -25,000 | $18.54 | $464k | 200 | 42 d ago |
| Aug 28, 2026 | Peter B Cancelmo VP, General Counsel | MOption exercise Stock Option (Right to Buy)derivative | -25,000 | $0.00 | $0 | 75,000 | 42 d ago |
| Aug 31, 2026 | Peter B Cancelmo VP, General Counsel | MOption exercise Stock Option (Right to Buy)derivative | -25,000 | $0.00 | $0 | 50,000 | 42 d ago |
| Aug 26, 2026 | Arnold C Hanish director | MOption exercise Common Stock | +5,000 | $15.81 | $79k | 5,000 | Aug 28, 2026 |
| Aug 26, 2026 | Arnold C Hanish director | SOpen-market sale Common Stock | -5,000 | $18.53 | $93k | 0 | Aug 28, 2026 |
| Aug 27, 2026 | Arnold C Hanish director | MOption exercise Common Stock | +2,500 | $15.81 | $40k | 2,500 | Aug 28, 2026 |
| Aug 27, 2026 | Arnold C Hanish director | MOption exercise Common Stock | +7,500 | $14.66 | $110k | 10,000 | Aug 28, 2026 |
| Aug 27, 2026 | Arnold C Hanish director | SOpen-market sale Common Stock | -5,000 | $18.88 | $94k | 5,000 | Aug 28, 2026 |
| Aug 27, 2026 | Arnold C Hanish director | SOpen-market sale Common Stock | -5,000 | $19.02 | $95k | 0 | Aug 28, 2026 |
| Aug 26, 2026 | Arnold C Hanish director | MOption exercise Stock Option (Right to Buy)derivative | -5,000 | $0.00 | $0 | 2,500 | Aug 28, 2026 |
| Aug 27, 2026 | Arnold C Hanish director | MOption exercise Stock Option (Right to Buy)derivative | -2,500 | $0.00 | $0 | 0 | Aug 28, 2026 |
| Aug 27, 2026 | Arnold C Hanish director | MOption exercise Stock Option (Right to Buy)derivative | -7,500 | $0.00 | $0 | 0 | Aug 28, 2026 |
| Aug 21, 2026 | David J. Borges VP, Finance & CAO | MOption exercise Common Stock10b5-1 | +5,906 | $3.93 | $23k | 5,906 | Aug 25, 2026 |
| Aug 21, 2026 | David J. Borges VP, Finance & CAO | MOption exercise Common Stock10b5-1 | +4,094 | $2.94 | $12k | 10,000 | Aug 25, 2026 |
| Aug 21, 2026 | David J. Borges VP, Finance & CAO | SOpen-market sale Common Stock10b5-1 | -10,000 | $18.95 | $190k | 0 | Aug 25, 2026 |
| Aug 24, 2026 | David J. Borges VP, Finance & CAO | MOption exercise Common Stock10b5-1 | +906 | $2.94 | $2,664 | 906 | Aug 25, 2026 |
| Aug 24, 2026 | David J. Borges VP, Finance & CAO | SOpen-market sale Common Stock10b5-1 | -906 | $19.10 | $17k | 0 | Aug 25, 2026 |
| Aug 21, 2026 | David J. Borges VP, Finance & CAO | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -5,906 | $0.00 | $0 | 9,094 | Aug 25, 2026 |
| Aug 21, 2026 | David J. Borges VP, Finance & CAO | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -4,094 | $0.00 | $0 | 20,906 | Aug 25, 2026 |
| Aug 24, 2026 | David J. Borges VP, Finance & CAO | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -906 | $0.00 | $0 | 20,000 | Aug 25, 2026 |
| Aug 20, 2026 | Thomas J. Cable director | MOption exercise Common Stock | +7,500 | $2.00 | $15k | 42,567 | Aug 21, 2026 |
| Aug 20, 2026 | Thomas J. Cable director | MOption exercise Common Stock | +7,500 | $3.93 | $29k | 50,067 | Aug 21, 2026 |
| Aug 20, 2026 | Thomas J. Cable director | SOpen-market sale Common Stock | -15,000 | $18.45 | $277k | 35,067 | Aug 21, 2026 |
| Aug 20, 2026 | Thomas J. Cable director | MOption exercise Stock Option (Right to Buy)derivative | -7,500 | $0.00 | $0 | 0 | Aug 21, 2026 |
| Aug 20, 2026 | Thomas J. Cable director | MOption exercise Stock Option (Right to Buy)derivative | -7,500 | $0.00 | $0 | 0 | Aug 21, 2026 |
| Aug 12, 2026 | Joseph L Schocken director | AGrant or award Stock Option (Right to Buy)derivative | +30,000 | $0.00 | $0 | 30,000 | Aug 18, 2026 |
| Aug 13, 2026 | David J. Borges VP, Finance & CAO | MOption exercise Common Stock10b5-1 | +5,000 | $3.93 | $20k | 5,000 | Aug 17, 2026 |
| Aug 13, 2026 | David J. Borges VP, Finance & CAO | SOpen-market sale Common Stock10b5-1 | -5,000 | $16.95 | $85k | 0 | Aug 17, 2026 |
| Aug 13, 2026 | David J. Borges VP, Finance & CAO | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -5,000 | $0.00 | $0 | 15,000 | Aug 17, 2026 |
| Jul 22, 2026 | David J. Borges VP, Finance & CAO | AGrant or award Stock Option (right to buy)derivative | +105,000 | $0.00 | $0 | 105,000 | Jul 24, 2026 |
| Jul 22, 2026 | Peter B Cancelmo VP, General Counsel | AGrant or award Stock Option (right to buy)derivative | +105,000 | $0.00 | $0 | 105,000 | Jul 24, 2026 |
| Jul 22, 2026 | Gregory A Demopulos MD Chairman, CEO & President | AGrant or award Stock Option (right to buy)derivative | +1,000,000 | $0.00 | $0 | 1,000,000 | Jul 24, 2026 |
| Jun 18, 2026 | Thomas F. Bumol director | AGrant or award Stock Option (Right to Buy)derivative | +15,000 | $0.00 | $0 | 15,000 | Jun 22, 2026 |
| Jun 18, 2026 | Thomas J. Cable director | AGrant or award Stock Option (Right to Buy)derivative | +15,000 | $0.00 | $0 | 15,000 | Jun 22, 2026 |
| Jun 18, 2026 | Peter A Demopulos MD director | AGrant or award Stock Option (Right to Buy)derivative | +15,000 | $0.00 | $0 | 15,000 | Jun 22, 2026 |
| Jun 18, 2026 | Arnold C Hanish director | AGrant or award Stock Option (Right to Buy)derivative | +15,000 | $0.00 | $0 | 15,000 | Jun 22, 2026 |
| Jun 18, 2026 | Leroy E. Hood MD PhD director | AGrant or award Stock Option (Right to Buy)derivative | +15,000 | $0.00 | $0 | 15,000 | Jun 22, 2026 |
| Jun 18, 2026 | Diana T. Perkinson director | AGrant or award Stock Option (Right to Buy)derivative | +15,000 | $0.00 | $0 | 15,000 | Jun 22, 2026 |
| Jun 18, 2026 | Rajiv Shah director | AGrant or award Stock Option (Right to Buy)derivative | +15,000 | $0.00 | $0 | 15,000 | Jun 22, 2026 |
Insiders
Everyone who has filed a Form 4 here.
- David J. BorgesVP, Finance & CAO
- Thomas F. Bumoldirector
- Thomas J. Cabledirector
- Peter B CancelmoVP, General Counsel
- Gregory A Demopulos MDChairman, CEO & President
- Peter A Demopulos MDdirector
- Arnold C Hanishdirector
- Leroy E. Hood MD PhDdirector
- Diana T. Perkinsondirector
- Joseph L Schockendirector
- Rajiv Shahdirector
Questions about OMER
Answered from the filings on this page, as of the latest one.
Are insiders buying OMER?
As of Sep 24, 2026, SEC Form 4 filings show 0 open-market buys worth $0 by 0 insiders and 6 open-market sells worth $2.2M by 4 insiders at OMEROS CORP in the last 90 days, net -$2.2M. Only purchases (code P) and sales (code S) count; grants, option exercises and tax withholding do not.
Who was the last insider to trade OMER on the open market?
David J. Borges (VP, Finance & CAO) sold $419k of OMER on Sep 22, 2026 and filed the Form 4 on Sep 24, 2026. InsiderTell scored 16 (weak), under a 10b5-1 plan.
How many insiders file Form 4 at OMEROS CORP?
11 people have filed a Form 4 at OMEROS CORP, among them David J. Borges (VP, Finance & CAO), Thomas F. Bumol (director), Thomas J. Cable (director). Officers, directors and holders of more than 10% of a share class must report their trades within two business days.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.