OMER

OMEROS CORP

SEC CIK 1285819
$8.74 −24.1% · 90 days
90-day buys
$0
0 open-market
90-day sells
$87K
1 open-market
Net insider flow
−$87K
Net selling
Filings shown
9
Most recent
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At a glance

Over the last 90 days, insiders at OMER have sold a net $87K of stock (0 open-market buys vs 1 sell).

Largest recent trade: Borges David J. sold $381.6K of OMER, trimming their stake 100%.

Most active filer: Demopulos Gregory A Md, with 4 transactions among the recent filings shown.

Insider transaction history

Form 4 filings for OMER, newest first
View on SEC EDGAR ↗
OMER
Option exercise Cable Thomas J. · Director · Option exercise · filed 2w ago ΔOwn +21%
+$81.3K
7,500 sh @ $11
OMER
Sell Cable Thomas J. · Director · Open-market sale · filed 2w ago ΔOwn −18%

Cable Thomas J. sold $87K of OMER, trimming their stake 18%.

−$87K
7,500 sh @ $12
OMER
Option exercise Demopulos Gregory A MD · Director, Chairman, CEO & President · Option exercise · filed Feb 20, 2026 ΔOwn +28%
+$4.11M
400,000 sh @ $10
OMER
Tax withholding Demopulos Gregory A MD · Director, Chairman, CEO & President · Tax withholding · filed Feb 20, 2026 ΔOwn −20%
−$4.27M
357,678 sh @ $12
OMER
Option exercise Borges David J. · VP, Finance & CAO · Option exercise · filed Jan 14, 2026 ΔOwn NEW
+$91.8K
30,000 sh @ $3
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OMER
Sell Borges David J. · VP, Finance & CAO · Open-market sale · filed Jan 14, 2026 ΔOwn −100%

Borges David J. sold $369.3K of OMER, trimming their stake 100%.

−$369.3K
30,000 sh @ $12
OMER
Sell Borges David J. · VP, Finance & CAO · Open-market sale · filed Jan 14, 2026 ΔOwn −100%

Borges David J. sold $381.6K of OMER, trimming their stake 100%.

−$381.6K
30,000 sh @ $13
OMER
Buy Demopulos Gregory A MD · Chairman, CEO & President · Open-market purchase · filed Nov 21, 2023 ΔOwn +14%

Demopulos Gregory A Md, OMER's CEO, spent $25.2K of their own money on 15,000 shares at $2, growing their stake 14%.

+$25.2K
15,000 sh @ $2
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About OMER insider activity

This page tracks every recent Form 4 filed for OMEROS CORP with the U.S. Securities and Exchange Commission. Form 4 is the disclosure that company insiders — officers, directors, and holders of more than 10% of the stock — must file within two business days of buying or selling shares.

The summary above nets open-market purchases against open-market sales over the trailing 90 days. Open-market trades (codes P and S) tend to carry the most signal because they reflect a deliberate choice to put money in or take it out, as opposed to routine grants, option exercises, or tax-withholding events. Use the badges on each row to tell them apart, and always confirm details against the original filing before drawing conclusions.

Frequently asked questions

How often is OMER insider data updated?

Continuously. We read from SEC EDGAR, so new Form 4 filings for OMEROS CORP usually appear here within minutes of being accepted by the SEC.

What does "net insider flow" mean?

It is the total dollar value of open-market insider purchases minus open-market sales over the last 90 days. A positive number (green) means insiders bought more than they sold; a negative number (red) means the reverse.

Why do some rows show grants or option exercises instead of buys?

Insiders receive stock through compensation as well as buying it outright. Form 4 captures all of these. We label each transaction by its SEC code so you can focus on open-market activity if you prefer.

Is this investment advice?

No. InsiderSource presents public filing data for informational purposes only. Insider activity is one of many factors to consider and is never a recommendation to buy or sell.