Over the 90-day window ending January 10, 2026, Omeros's three dominant insider ownership positions are held by Chairman And Ceo & President Gregory A Md Demopulos (1.73Mn shares), Director Peter A Md Demopulos (208.52K shares), Director Thomas J. Cable (35.07K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Gregory A Md Demopulos | Chairman And Ceo & President | 1,726,986 | 15 Oct, 2025 |
| Peter A Md Demopulos | 208,516 | 17 Nov, 2023 | |
| Thomas J. Cable | 35,067 | 23 May, 2023 | |
| Arnold C Hanish | 10,000 | 23 May, 2023 | |
| Thomas F. Bumol | 10,000 | 14 Sep, 2023 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 13 Oct, 2025 | Gregory A Md Demopulos | Common Stock | A | 300,000 | $0.00 | 300,000 | I | G |
| 13 Oct, 2025 | Gregory A Md Demopulos | Common Stock | D | 600,000 | $0.00 | 1,426,986 | D | G |
| 13 Oct, 2025 | Gregory A Md Demopulos | Common Stock | A | 300,000 | $0.00 | 300,000 | I | G |
| 17 Nov, 2023 | Gregory A Md Demopulos | Common Stock | A | 15,000 | $1.68 | 123,945 | I | P |
| 15 Nov, 2023 | Peter A Md Demopulos | Common Stock | A | 10,000 | $1.53 | 208,516 | D | P |
| 15 Nov, 2023 | Peter A Md Demopulos | - | - | 208,516 | D | |||
| 14 Nov, 2023 | Gregory A Md Demopulos | Common Stock | A | 25,000 | $1.44 | 108,945 | I | A |
| 13 Nov, 2023 | Gregory A Md Demopulos | Common Stock | A | 37,500 | $1.29 | 83,945 | I | A |
| 12 Sep, 2023 | Thomas F. Bumol | Common Stock | A | 10,000 | $3.31 | 10,000 | I | A |
| 12 Sep, 2023 | Thomas F. Bumol | - | - | 10,000 | I | |||
| 22 May, 2023 | Arnold C Hanish | Common Stock | A | 5,000 | $5.30 | 5,000 | D | M |
| 22 May, 2023 | Arnold C Hanish | Common Stock | D | 5,000 | $6.46 | 0 | D | S |
| 22 May, 2023 | Arnold C Hanish | - | - | 5,000 | D | |||
| 22 May, 2023 | Arnold C Hanish | - | - | 0 | D | |||
| 22 May, 2023 | Thomas J. Cable | Common Stock | D | 5,000 | $6.53 | 35,067 | D | S |
| 22 May, 2023 | Thomas J. Cable | Common Stock | A | 5,000 | $5.30 | 40,067 | D | M |
| 08 Sep, 2021 | Arnold C Hanish | Common Stock | A | 10,000 | $9.44 | 10,000 | I | M |
| 08 Sep, 2021 | Arnold C Hanish | - | - | 10,000 | I | |||
| 17 Jun, 2021 | Gregory A Md Demopulos | - | - | 2,026,986 | D | |||
| 17 Jun, 2021 | Gregory A Md Demopulos | Common Stock | A | 36,857 | $4.10 | 2,063,843 | D | M |