Omeros Corporation
Omeros Corporation (OMER) Insider Trading
Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.
SEC EDGAR · FMP · OMER · as of Jun 8, 2026
Activity summary
Buy transactions
0
P-Purchase only
Sell transactions
2
12 Months
Buy/Sell ratio
0.00
Buy/Sell (by trades)
Overall sentiment
Omeros Corporation insiders have been primarily selling shares over the past 12 Months. Selling activity is often driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment toward the company.
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only
As of Jun 8, 2026
OMER insider buying and selling by quarter
OMER insider selling · OMER insider buying stocks · quarterly insider activity
Mobile shows last 4Q · Desktop shows full 8Q
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters
As of Jun 8, 2026
Active insiders
Most active in past 12 months · OMER ceo insider trading
Showing all insiders · Click a card to filter the transactions table below
▸ Aggregated from reportingName · top 5 by trade count (12M) · no extra API
Recent insider transactions
OMER executive sell shares · OMER board member insider trading · OMER insider trading SEC filing
Scroll horizontally to see all columns
| Date | Insider | Type | Shares | Value | Filing |
|---|---|---|---|---|---|
| May 22, 2026 | Cable Thomas J. Director | Option | 7,500 | $81K | Form 4 |
| May 22, 2026 | Cable Thomas J. Director | Sale | 7,500 | $87K | Form 4 |
| Oct 13, 2025 | Demopulos Gregory A MD Chairman, CEO & President · Director | Gift | 600,000 | — | Form 4 |
| Oct 13, 2025 | Demopulos Gregory A MD Chairman, CEO & President · Director | Gift | 300,000 | — | Form 4 |
| Nov 17, 2023 | Demopulos Gregory A MD Chairman, CEO & President | Purchase | 15,000 | $25K | Form 4 |
| Nov 15, 2023 | Demopulos Peter A MD Director | Purchase | 10,000 | $15K | Form 4 |
| Nov 14, 2023 | Demopulos Gregory A MD Chairman, CEO & President | Award | 25,000 | $36K | Form 4 |
| Nov 13, 2023 | Demopulos Gregory A MD Chairman, CEO & President | Award | 37,500 | $48K | Form 4 |
| Sep 12, 2023 | Bumol Thomas F. Director | Award | 10,000 | $33K | Form 4 |
| May 22, 2023 | HANISH ARNOLD C Director | Option | 5,000 | $27K | Form 4 |
| May 22, 2023 | HANISH ARNOLD C Director | Sale | 5,000 | $32K | Form 4 |
| May 22, 2023 | Cable Thomas J. Director | Option | 5,000 | $27K | Form 4 |
| May 22, 2023 | Cable Thomas J. Director | Sale | 5,000 | $33K | Form 4 |
| Sep 8, 2021 | HANISH ARNOLD C Director | Option | 10,000 | $94K | Form 4 |
| Jun 17, 2021 | Demopulos Gregory A MD CHAIRMAN, CEO & PRESIDENT · Director | Option | 36,857 | $151K | Form 4 |
| Jun 15, 2021 | Demopulos Gregory A MD CHAIRMAN, CEO & PRESIDENT · Director | Option | 36,856 | $151K | Form 4 |
| Jun 17, 2021 | Demopulos Gregory A MD CHAIRMAN, CEO & PRESIDENT · Director | Sale | 36,857 | $549K | Form 4 |
| Jun 15, 2021 | Demopulos Gregory A MD CHAIRMAN, CEO & PRESIDENT · Director | Sale | 36,856 | $554K | Form 4 |
Demopulos Gregory A MD
Chairman, CEO & President · Director
Date
Oct 13
Shares
600,000
Price
—
Value
—
Demopulos Gregory A MD
Chairman, CEO & President · Director
Date
Oct 13
Shares
300,000
Price
—
Value
—
Demopulos Gregory A MD
Chairman, CEO & President
Date
Nov 17
Shares
15,000
Price
$1.68
Value
$25K
Demopulos Gregory A MD
Chairman, CEO & President
Date
Nov 14
Shares
25,000
Price
$1.44
Value
$36K
Demopulos Gregory A MD
Chairman, CEO & President
Date
Nov 13
Shares
37,500
Price
$1.29
Value
$48K
Demopulos Gregory A MD
CHAIRMAN, CEO & PRESIDENT · Director
Date
Jun 17
Shares
36,857
Price
$4.10
Value
$151K
Demopulos Gregory A MD
CHAIRMAN, CEO & PRESIDENT · Director
Date
Jun 15
Shares
36,856
Price
$4.10
Value
$151K
Demopulos Gregory A MD
CHAIRMAN, CEO & PRESIDENT · Director
Date
Jun 17
Shares
36,857
Price
$14.90
Value
$549K
Demopulos Gregory A MD
CHAIRMAN, CEO & PRESIDENT · Director
Date
Jun 15
Shares
36,856
Price
$15.02
Value
$554K
▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —
About OMER insider trading
OMER insider trades
Omeros Corporation (OMER) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including Cable Thomas J. (Director), Demopulos Gregory A MD (Chairman, CEO & President · Director). Over the past 12 months, 2 insiders have filed transactions with the SEC. OMER insiders have been primarily selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.
For Omeros Corporation's institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →
Frequently asked questions
OMER insider trading · 5 questionsThe insiders of Omeros Corporation (OMER) include executives and directors such as Cable Thomas J. (Director), Demopulos Gregory A MD (Chairman, CEO & President · Director), among others. Over the past 12 months, 2 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.
▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 8, 2026