Omeros Corp (OMER) Insider Ownership

Historic Insider Ownership Trends

Data spanning the past 90 days through February 10, 2026 reveals that Omeros's three principal insider shareholders consist of 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).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
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.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
13 Jan, 2026 David J. Borges Common stock D 30,000 $12.31 0 D S
13 Jan, 2026 David J. Borges Common stock A 30,000 $3.06 30,000 D M
12 Jan, 2026 David J. Borges Common stock D 30,000 $12.72 0 D S
13 Oct, 2025 Gregory A Md Demopulos - - 300,000 I
13 Oct, 2025 Gregory A Md Demopulos - - 1,426,986 D
13 Oct, 2025 Gregory A Md Demopulos - - 300,000 I
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
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 - - 5,000 D
22 May, 2023 Arnold C Hanish Common Stock A 5,000 $5.30 5,000 D M
22 May, 2023 Arnold C Hanish - - 0 D
22 May, 2023 Arnold C Hanish Common Stock D 5,000 $6.46 0 D S