Quick Takeaways
- OMER - OMEROS CORP has 13 insiders with reported activity on this page.
- Net insider value flow over the last year: -$750,915.
- Recent transaction rows are available for direct filing-level review.
- Info
- Insider Trading
- Financials
- Holders
Insider Transactions Reported by 13 Insiders of OMEROS CORP
- Symbol
- OMER on Nasdaq
- Location
- Seattle, WA
What Changed
- Buy value: ; sell value: $750,915.
- Net share flow: -60,000.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Official SEC Source
Insider trading overview
Last 12 monthsNet insider flow leans to selling over the last 12 months. Net value: -$750,915.
Buys
$0
Shares: 0
Insiders: 0
Sells
$750,915
Shares: 60,000
Insiders: 1
Net
-$750,915
Shares: -60,000
Insiders: -1
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 60,000 | $0 | $750,915 | -$750,915 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
OMEROS CORP executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Gregory A. Demopulos MD | Chairman, CEO & President, Director | $22,586,507 | Mixed | 18 Feb 2026 | ||
| David J. Borges | VP, Finance & CAO | $0 | -$750,915 | -100% | Mixed | 12 Jan 2026 |
| Arnold C. Hanish | Director | Mixed | 27 Jun 2025 | |||
| Peter A. Demopulos MD | Director | Mixed | 27 Jun 2025 | |||
| Peter B. Cancelmo | VP, General Counsel | Mixed | 30 Jun 2025 | |||
| Michael A. Jacobsen | VP, Finance & CAO | Mixed | 25 Apr 2024 | |||
| Thomas J. Cable | Director | Mixed | 27 Jun 2025 | |||
| Ray Aspiri | Director | Mixed | 11 Jun 2021 | |||
| Kurt Zumwalt | Director | Mixed | 21 Sep 2022 | |||
| Thomas F. Bumol | Director | Mixed | 27 Jun 2025 | |||
| Rajiv Shah | Director | Mixed | 27 Jun 2025 | |||
| Perkinson Diana T. | Director | Mixed | 27 Jun 2025 | |||
| Leroy E. MD Hood PhD | Director | Mixed | 27 Jun 2025 |
Top shareholders of OMEROS CORP (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
|
Company |
7.1%
|
5,062,438
|
$86,947,374 | — | 31 Dec 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
5.7%
|
4,013,315
|
$68,928,685 | — | 31 Dec 2025 | |
| INGALLS & SNYDER LLC |
13F
13D/G
|
Company |
7.2%
from 13D/G
|
3,448,699
|
$59,231,000 | — | 31 Dec 2025 | |
| UBS Group AG |
13F
|
Company |
3.1%
|
2,222,982
|
$38,179,715 | — | 31 Dec 2025 | |
| STIFEL FINANCIAL CORP |
13F
|
Company |
2.6%
|
1,809,766
|
$31,082,740 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
2.3%
|
1,631,350
|
$28,025,557 | — | 31 Dec 2025 | |
| STATE STREET CORP |
13F
|
Company |
2.2%
|
1,573,526
|
$27,025,309 | — | 31 Dec 2025 | |
| Gregory A. Demopulos MD |
3/4/5
|
Chairman, CEO & President, Director |
2.7%
|
1,893,253
|
$22,586,507 | — | 18 Feb 2026 | |
| Kevin Kotler |
13F
|
Individual |
1.3%
|
905,635
|
$15,554,281 | — | 31 Dec 2025 | |
| D. E. Shaw & Co., Inc. |
13F
|
Company |
1.1%
|
754,999
|
$12,967,108 | — | 31 Dec 2025 | |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP |
13F
|
Company |
1%
|
741,895
|
$12,742,047 | — | 31 Dec 2025 | |
| Corient Private Wealth LLC |
13F
|
Company |
0.97%
|
688,025
|
$11,816,830 | — | 31 Dec 2025 | |
| NOMURA HOLDINGS INC |
13F
|
Company |
0.92%
|
655,021
|
$11,249,986 | — | 31 Dec 2025 | |
| BANK OF MONTREAL /CAN/ |
13F
|
Company |
0.85%
|
601,643
|
$10,333,219 | — | 31 Dec 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.84%
|
593,222
|
$10,188,588 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.74%
|
526,732
|
$9,046,622 | — | 31 Dec 2025 | |
| TWO SIGMA INVESTMENTS, LP |
13F
|
Company |
0.74%
|
524,757
|
$9,012,701 | — | 31 Dec 2025 | |
| ROYAL BANK OF CANADA |
13F
|
Company |
0.7%
|
498,399
|
$8,560,000 | — | 31 Dec 2025 | |
| JANE STREET GROUP, LLC |
13F
|
Company |
0.65%
|
463,622
|
$7,962,708 | — | 31 Dec 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
0.62%
|
441,811
|
$7,588,104 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
0.54%
|
386,152
|
$6,632,161 | — | 31 Dec 2025 | |
| Badgley Phelps Wealth Managers, LLC |
13F
|
Company |
0.37%
|
263,556
|
$4,526,575 | — | 31 Dec 2025 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
0.34%
|
240,352
|
$4,128,046 | — | 31 Dec 2025 | |
| Jump Financial, LLC |
13F
|
Company |
0.32%
|
228,000
|
$3,915,900 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.32%
|
227,294
|
$3,903,775 | — | 31 Dec 2025 | |
| Informed Momentum Co LLC |
13F
|
Company |
0.29%
|
207,480
|
$3,563,469 | — | 31 Dec 2025 | |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
|
Company |
0.29%
|
202,617
|
$3,479,947 | — | 31 Dec 2025 | |
| Itau Unibanco Holding S.A. |
13F
|
Company |
0.25%
|
180,000
|
$3,052,800 | — | 31 Dec 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.23%
|
165,782
|
$2,847,312 | — | 31 Dec 2025 | |
| WELLS FARGO & COMPANY/MN |
13F
|
Company |
0.23%
|
165,280
|
$2,838,684 | — | 31 Dec 2025 | |
| Invesco Ltd. |
13F
|
Company |
0.22%
|
154,782
|
$2,658,380 | — | 31 Dec 2025 | |
| Nuveen, LLC |
13F
|
Company |
0.22%
|
153,187
|
$2,630,987 | — | 31 Dec 2025 | |
| Clutterbuck Capital Management LLC |
13F
|
Company |
0.21%
|
150,000
|
$2,576,250 | — | 31 Dec 2025 | |
| GROUP ONE TRADING LLC |
13F
|
Company |
0.19%
|
133,269
|
$2,288,895 | — | 31 Dec 2025 | |
| SIMPLEX TRADING, LLC |
13F
|
Company |
0.17%
|
123,979
|
$2,129,339 | — | 31 Dec 2025 | |
| BARCLAYS PLC |
13F
|
Company |
0.17%
|
120,490
|
$2,069,416 | — | 31 Dec 2025 | |
| AMERIPRISE FINANCIAL INC |
13F
|
Company |
0.17%
|
117,004
|
$2,009,544 | — | 31 Dec 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.16%
|
114,808
|
$1,971,827 | — | 31 Dec 2025 | |
| Walleye Capital LLC |
13F
|
Company |
0.16%
|
109,956
|
$1,888,494 | — | 31 Dec 2025 | |
| HighTower Advisors, LLC |
13F
|
Company |
0.15%
|
104,059
|
$1,787,216 | — | 31 Dec 2025 | |
| RHUMBLINE ADVISERS |
13F
|
Company |
0.14%
|
100,105
|
$1,719,287 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
0.14%
|
96,948
|
$1,665,082 | — | 31 Dec 2025 | |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
|
Company |
0.14%
|
95,745
|
$1,644,000 | — | 31 Dec 2025 | |
| Susquehanna Portfolio Strategies, LLC |
13F
|
Company |
0.13%
|
92,759
|
$1,593,136 | — | 31 Dec 2025 | |
| AlphaQuest LLC |
13F
|
Company |
0.12%
|
82,597
|
$1,418,603 | — | 31 Dec 2025 | |
| Cambridge Investment Research Advisors, Inc. |
13F
|
Company |
0.12%
|
81,643
|
$1,402,000 | — | 31 Dec 2025 | |
| MML INVESTORS SERVICES, LLC |
13F
|
Company |
0.11%
|
77,875
|
$1,337,503 | — | 31 Dec 2025 | |
| TWO SIGMA ADVISERS, LP |
13F
|
Company |
0.11%
|
76,100
|
$1,307,018 | — | 31 Dec 2025 | |
| ALLIANCEBERNSTEIN L.P. |
13F
|
Company |
0.1%
|
73,490
|
$1,262,191 | — | 31 Dec 2025 | |
| Walleye Trading LLC |
13F
|
Company |
0.1%
|
69,653
|
$1,196,290 | — | 31 Dec 2025 |
Recent Insider Transactions by Companies or Individuals for OMEROS CORP
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Gregory A. Demopulos MD | OMER | Common stock | Tax liability | -19.6% | -357,678 | 1,469,308 | 18 Feb 2026 | Direct | ||
| Gregory A. Demopulos MD | OMER | Common stock | Options Exercise | 28% | 400,000 | 1,826,986 | 18 Feb 2026 | Direct | ||
| Gregory A. Demopulos MD | OMER | Stock option (right to buy) | Options Exercise | -100% | -400,000 | 0 | 18 Feb 2026 | Direct | ||
| David J. Borges | OMER | Common stock | Sale | -100% | $369,315 | $12.31 | -30,000 | 0 | 13 Jan 2026 | Direct |
| David J. Borges | OMER | Common stock | Options Exercise | 30,000 | 30,000 | 13 Jan 2026 | Direct | |||
| David J. Borges | OMER | Stock Option (right to buy) | Options Exercise | -31.6% | -30,000 | 65,000 | 13 Jan 2026 | Direct | ||
| David J. Borges | OMER | Common stock | Sale | -100% | $381,600 | $12.72 | -30,000 | 0 | 12 Jan 2026 | Direct |
| Gregory A. Demopulos MD | OMER | Common Stock | Gift | 600,000 | 300,000 | 13 Oct 2025 | By trust | |||
| Gregory A. Demopulos MD | OMER | Common Stock | Gift | -29.6% | -600,000 | 1,426,986 | 13 Oct 2025 | Direct | ||
| Gregory A. Demopulos MD | OMER | Stock Option (right to buy) | Award | 865,000 | 865,000 | 30 Jun 2025 | Direct | |||
| Peter B. Cancelmo | OMER | Stock Option (right to buy) | Award | 100,000 | 100,000 | 30 Jun 2025 | Direct | |||
| David J. Borges | OMER | Stock Option (right to buy) | Award | 95,000 | 95,000 | 30 Jun 2025 | Direct | |||
| Rajiv Shah | OMER | Stock Option (Right to Buy) | Award | 15,000 | 15,000 | 27 Jun 2025 | Direct | |||
| Perkinson Diana T. | OMER | Stock Option (Right to Buy) | Award | 15,000 | 15,000 | 27 Jun 2025 | Direct | |||
| Leroy E. MD Hood PhD | OMER | Stock Option (Right to Buy) | Award | 15,000 | 15,000 | 27 Jun 2025 | Direct | |||
| Arnold C. Hanish | OMER | Stock Option (Right to Buy) | Award | 15,000 | 15,000 | 27 Jun 2025 | Direct | |||
| Peter A. Demopulos MD | OMER | Stock Option (Right to Buy) | Award | 15,000 | 15,000 | 27 Jun 2025 | Direct | |||
| Thomas J. Cable | OMER | Stock Option (Right to Buy) | Award | 15,000 | 15,000 | 27 Jun 2025 | Direct | |||
| Thomas F. Bumol | OMER | Stock Option (Right to Buy) | Award | 15,000 | 15,000 | 27 Jun 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.