OMER

Omeros Corporation$17.15-0.30 (-1.72%)

Prev Close$17.46·MCap$1.35B·P/E13.19·Vol1.25M·Yield—

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Buys (12M)

$0.00

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Sells (12M)

$6.79M

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Net Activity

Net Seller

$6.79M

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Active Insiders

last 12 mo

Over the past 12 months, insider activity at Omeros Corporation (OMER) has been exclusively selling, with 0 insider purchases totaling $0.00 and 8 insider sales totaling $6.79M. The most recent insider transaction was by Cancelmo Peter B (officer: VP, General Counsel), who sold $929.7K worth of shares on Sep 1, 2026. Omeros Corporation operates in the Healthcare sector, within the Biotechnology industry, with a market cap of $1.35B.

OMER Insider Trading Activity

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Sep 1, 2026	Cancelmo Peter B	officer: VP, General Counsel	Sell	50,000	$18.59	$929.7K	200-100%
Aug 28, 2026	HANISH ARNOLD C	director	Sell	10,000	$18.77	$187.7K	0Exit
Aug 25, 2026	Borges David J.	officer: VP, Finance & CAO	Sell	10,906	$18.96	$206.8K	0Exit
Aug 21, 2026	Cable Thomas J.	director	Sell	15,000	$18.45	$276.8K	35,067-30%
Aug 17, 2026	Borges David J.	officer: VP, Finance & CAO	Sell	5,000	$16.95	$84.8K	0Exit
May 27, 2026	Cable Thomas J.	director	Sell	7,500	$11.61	$87.0K	35,067
Feb 18, 2026	Demopulos Gregory A MD	Chairman, CEO & President	Sell	357,678	$11.93	$4.27M0.5% OS	0
Jan 14, 2026	Borges David J.	officer: VP, Finance & CAO	Sell	60,000	$12.52	$750.9K	0Exit
Nov 21, 2023	Demopulos Gregory A MD	Chairman, CEO & President	Buy	15,000	$1.68	$25.2K	123,945
Nov 17, 2023	Demopulos Peter A MD	Director	Buy	10,000	$1.53	$15.3K	208,516
May 23, 2023	Cable Thomas J.		Sell	5,000	$6.53	$32.6K	35,067
May 23, 2023	HANISH ARNOLD C		Sell	5,000	$6.46	$32.3K	0Exit
Jun 17, 2021	Demopulos Gregory A MD	CHAIRMAN, CEO & PRESIDENT	Sell	73,713	$14.96	$1.10M	2,026,986
May 21, 2021	Demopulos Gregory A MD	CHAIRMAN, CEO & PRESIDENT	Sell	73,713	$16.01	$1.18M	2,026,986
Apr 8, 2021	Demopulos Gregory A MD	CHAIRMAN, CEO & PRESIDENT	Sell	72,613	$17.84	$1.30M	2,026,986

OMER Insider Buying Activity

The following table shows recent insider purchases of Omeros Corporation (OMER) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Nov 21, 2023	Demopulos Gregory A MD	Chairman, CEO & President	Buy	15,000	$1.68	$25.2K	123,945
Nov 17, 2023	Demopulos Peter A MD	Director	Buy	10,000	$1.53	$15.3K	208,516

OMER Insider Selling Activity

The following table shows recent insider sales of Omeros Corporation (OMER) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Sep 1, 2026	Cancelmo Peter B	officer: VP, General Counsel	Sell	50,000	$18.59	$929.7K	200-100%
Aug 28, 2026	HANISH ARNOLD C	director	Sell	10,000	$18.77	$187.7K	0Exit
Aug 25, 2026	Borges David J.	officer: VP, Finance & CAO	Sell	10,906	$18.96	$206.8K	0Exit
Aug 21, 2026	Cable Thomas J.	director	Sell	15,000	$18.45	$276.8K	35,067-30%
Aug 17, 2026	Borges David J.	officer: VP, Finance & CAO	Sell	5,000	$16.95	$84.8K	0Exit
May 27, 2026	Cable Thomas J.	director	Sell	7,500	$11.61	$87.0K	35,067
Feb 18, 2026	Demopulos Gregory A MD	Chairman, CEO & President	Sell	357,678	$11.93	$4.27M0.5% OS	0
Jan 14, 2026	Borges David J.	officer: VP, Finance & CAO	Sell	60,000	$12.52	$750.9K	0Exit
May 23, 2023	Cable Thomas J.		Sell	5,000	$6.53	$32.6K	35,067
May 23, 2023	HANISH ARNOLD C		Sell	5,000	$6.46	$32.3K	0Exit
Jun 17, 2021	Demopulos Gregory A MD	CHAIRMAN, CEO & PRESIDENT	Sell	73,713	$14.96	$1.10M	2,026,986
May 21, 2021	Demopulos Gregory A MD	CHAIRMAN, CEO & PRESIDENT	Sell	73,713	$16.01	$1.18M	2,026,986
Apr 8, 2021	Demopulos Gregory A MD	CHAIRMAN, CEO & PRESIDENT	Sell	72,613	$17.84	$1.30M	2,026,986