Omeros director plans $94K stock sale in 2026

OMEROS CORP (OMER) received a Rule 144 notice from director Arnold C. Hanish covering a planned sale of 5,000 shares of Omeros common stock.

Rhea-AI Filing Summary

OMEROS CORP (OMER) received a Rule 144 notice from director Arnold C. Hanish covering a planned sale of 5,000 shares of Omeros common stock. The shares are to be sold through Morgan Stanley Smith Barney LLC, following an exercise of options under a registered plan, with an indicated value of $94,132.50 and a proposed sale date of 08/26/2026 on NASDAQ.

Key Figures

Shares to be sold: 5,000 shares of common stock Aggregate value: $94,132.50 Proposed sale date: 08/26/2026 +2 more

5 metrics

Shares to be sold 5,000 shares of common stock Proposed sale under Rule 144 by director Arnold C. Hanish

Aggregate value $94,132.50 Value associated with 5,000 Omeros common shares in the planned Rule 144 sale

Proposed sale date 08/26/2026 Planned sale date and option exercise date for the 5,000 shares

Broker Morgan Stanley Smith Barney LLC Executive Financial Services Broker listed for execution of the planned Rule 144 sale

Person for whose account securities are to be sold Arnold C. Hanish Director of Omeros Corporation filing the Form 144 notice

Key Terms

Rule 144, Exercise of Options Under a Registered Plan, Form 144, aggregate value

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Exercise of Options Under a Registered Plan financial

"Common | 08/26/2026 | Exercise of Options Under a Registered Plan | Issuer"

Form 144 regulatory

"144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

aggregate value financial

"Common | Morgan Stanley Smith Barney LLC Executive Financial Services ... | 5000 | 94132.50"

FAQ

What does the Form 144 filing for OMER by Arnold C. Hanish disclose?

It discloses that director Arnold C. Hanish plans to sell 5,000 shares of Omeros common stock under Rule 144, following an exercise of options under a registered plan, with an indicated value of $94,132.50 and a proposed sale date of 08/26/2026.

How many OMER shares are covered by Arnold C. Hanish’s Form 144?

The Form 144 covers a proposed sale of 5,000 shares of Omeros Corporation common stock. These shares are associated with an exercise of options under a registered plan and are to be sold pursuant to Rule 144 conditions.

What is the aggregate value of the OMER shares in this Form 144 filing?

The filing lists an aggregate value of $94,132.50 for the 5,000 shares of Omeros common stock proposed for sale by director Arnold C. Hanish under Rule 144.

When are the OMER shares in this Form 144 expected to be sold?

The proposed sale date for the 5,000 Omeros common shares is 08/26/2026, as indicated in the Form 144. This date appears both as the proposed sale date and as the option exercise date under the registered plan.

Through which broker will the OMER shares in this Form 144 be sold?

The planned sale of 5,000 Omeros common shares is listed as being through Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, New York, as disclosed in the Form 144.

What is the source of the OMER shares being sold in Arnold C. Hanish’s Form 144?

The Form 144 states that the 5,000 Omeros common shares are to be sold upon Exercise of Options Under a Registered Plan, with the transaction to be settled in cash on or about 08/26/2026.

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Available on EDGAR 08/26/2026 - 04:17 PM Accepted by SEC EDGAR 08/26/2026 - 04:16 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001233253
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	OMEROS CORPORATION
SEC File Number	001-34475
Address of Issuer	201 Elliott Avenue West Seattle WASHINGTON 98119
Phone	206-676-5000
Name of Person for Whose Account the Securities are To Be Sold	ARNOLD HANISH
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	5000	94132.50	72388316	08/26/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	08/26/2026	Exercise of Options Under a Registered Plan	Issuer			5000	08/26/2026	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	08/26/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Arnold C Hanish
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)