Form 4 for OMER OMEROS CORP
Accepted 2026-09-01 16:41:06 ET · period of report 2026-08-28 · accession 0001437749-26-029427 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DM | 2026-09-01 16:41 | 2026-08-28+ | OMER | Cancelmo Peter B | VP, GC | M - OptEx | $2.94 | +50.0K | 25.2K | New | +$147.0K |
| DM | 2026-09-01 16:41 | 2026-08-28+ | OMER | Cancelmo Peter B | VP, GC | S - Sale+OE | $18.59 | -50.0K | 200 | -100% | -$929.7K |
| DM | 2026-09-01 16:41 | 2026-08-28+ | OMER | Cancelmo Peter B | VP, GC | M - OptEx | $0.00 | -50.0K | 50.0K | -50% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-08-28 | M | A | 25,000 | $2.94 | 25,200 | D | — | — | |
| 2 | Common | Common Stock | 2026-08-28 | S | D | 25,000 | $18.65 | 200 | D | — | — | (F1) This transaction was executed in multiple trades at prices ranging from $18.55 to $18.77. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide full information regarding the number of shares and prices at which the transactions referenced in this footnote were effected upon request to the SEC staff, the issuer, or a security holder of the issuer. |
| 3 | Common | Common Stock | 2026-08-31 | M | A | 25,000 | $2.94 | 25,200 | D | — | — | |
| 4 | Common | Common Stock | 2026-08-31 | S | D | 25,000 | $18.54 | 200 | D | — | — | (F2) This transaction was executed in multiple trades at prices ranging from $18.32 to $18.90. The price reported above reflects the weighted average sales price. The reporting person hereby undertakes to provide full information regarding the number of shares and prices at which the transactions referenced in this footnote were effected upon request to the SEC staff, the issuer, or a security holder of the issuer. |
| 5 | Derivative | Stock Option (Right to Buy) | 2026-08-28 | M | D | 25,000 | $0.00 | 75,000 | D | $2.94 · — to 2033-09-22 | 25,000 Common Stock | (F3) This option shall vest and become exercisable over 48 equal monthly installments, with a vesting commencement date of April 1, 2023. Installments vest and become exercisable on each monthly anniversary thereafter. |
| 6 | Derivative | Stock Option (Right to Buy) | 2026-08-31 | M | D | 25,000 | $0.00 | 50,000 | D | $2.94 · — to 2033-09-22 | 25,000 Common Stock | (F3) This option shall vest and become exercisable over 48 equal monthly installments, with a vesting commencement date of April 1, 2023. Installments vest and become exercisable on each monthly anniversary thereafter. |