What is the net share effect of David J. Borges’ August 13, 2026 transactions in OMER stock?

The transaction summary shows 5,000 shares sold and 5,000 shares acquired via option exercise, resulting in net-sell shares of 5,000 when aggregating reported buy-sell activity in the filing.

Omeros exec Borges sells 5,000 shares at $16.95

Q: What insider transactions did OMER executive David J. Borges report on August 13, 2026?

He exercised 5,000 stock options at $3.93 and acquired 5,000 common shares, then sold 5,000 shares at $16.95 the same day. The exercise and sale are reported as direct holdings.

Q: Was the August 13, 2026 OMER stock sale by David J. Borges under a Rule 10b5-1 plan?

Yes. The filing states the 5,000-share open market sale was made pursuant to a previously established Rule 10b5-1 trading plan adopted on February 10, 2026, with the trading schedule set at that time.

Q: At what prices did David J. Borges exercise options and sell OMER shares?

He exercised options at an exercise price of $3.93 per share and sold the resulting 5,000 common shares at an open-market sale price of $16.95 per share on August 13, 2026.

Q: How many OMER stock options remain for David J. Borges from this grant after the transaction?

After exercising 5,000 stock options, the filing reports 15,000 options of this award remaining outstanding. These options continue to vest over 48 equal monthly installments starting from April 1, 2022.

Q: How does the Form 4 describe the vesting schedule of David J. Borges’ OMER stock options?

The option vests and becomes exercisable over 48 equal monthly installments, with a vesting commencement date of April 1, 2022. Installments vest and become exercisable on each monthly anniversary thereafter, as described in the footnote.

Omeros Corp executive David J. Borges reported an option exercise and same-day sale of common stock.

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)How Sentiment works

Sentiment and the balance of points

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Form Type

Rhea-AI Filing Summary

Omeros Corp executive David J. Borges reported an option exercise and same-day sale of common stock. On August 13, 2026, he exercised 5,000 stock options with an exercise price of $3.93 per share, acquiring 5,000 common shares, and then sold 5,000 common shares at $16.95 per share in an open-market transaction. The filing states that the sale was made under a previously established Rule 10b5-1 trading plan, and that following the option exercise, 15,000 options of this grant remained outstanding, continuing to vest in equal monthly installments from a vesting commencement date of April 1, 2022.

Insider Trade Summary 10b5-1

Exercise and Sale: 5,000 shares ($65K approx. pre-tax spread)

Exercise and Sale 3 txns

Insider Borges David J.

Role VP, Finance & CAO

Sold 5,000 shs ($85K)

Approx. gross sale proceeds $85K

Approx. exercise cost $20K

Approx. pre-tax spread $65K

Type	Security	Shares	Price	Value
Exercise	Stock Option (Right to Buy) ^F2	5,000	$0.00	$0.00
Exercise	Common Stock	5,000	$3.93	$20K
Sale	Common Stock ^F1	5,000	$16.95	$85K

Holdings After Transaction: Stock Option (Right to Buy) — 15,000 contracts (Direct); Common Stock — 0 shares (Direct)

Footnotes (2)

F1. Open market sale pursuant to a previously established Rule 10b5-1 trading plan adopted by the reporting person on February 10, 2026. The trading schedule, including sale periods and the number of shares to be sold, was established at the time of the trading plan's adoption in accordance with Rule 10b5-1 under the Securities Exchange Act of 1934, as amended.
F2. This option vests and becomes exercisable over 48 equal monthly installments, with a vesting commencement date of April 1, 2022. Installments vest and become exercisable on each monthly anniversary thereafter.

Key Figures

Options Exercised: 5,000 shares Option Exercise Price: $3.93 per share Shares Sold: 5,000 shares +5 more

8 metrics

Options Exercised 5,000 shares Stock Option (Right to Buy) exercised on August 13, 2026

Option Exercise Price $3.93 per share Conversion or exercise price for stock option exercised on August 13, 2026

Shares Sold 5,000 shares Open market sale of common stock on August 13, 2026

Sale Price $16.95 per share Price for 5,000 common shares sold on August 13, 2026

Options Remaining 15,000 options Total stock options following the derivative transaction

Vesting Period 48 monthly installments Option vests over 48 equal monthly installments from April 1, 2022

10b5-1 Plan Adoption Date February 10, 2026 Date the Rule 10b5-1 trading plan governing the sale was adopted

Option Expiration Date September 20, 2032 Expiration date of the stock option exercised

Key Terms

Rule 10b5-1 trading plan, Stock Option (Right to Buy), vesting commencement date, monthly anniversary

4 terms

Rule 10b5-1 trading plan regulatory

"Open market sale pursuant to a previously established Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

Stock Option (Right to Buy) financial

"security_title: Stock Option (Right to Buy)"

vesting commencement date financial

"with a vesting commencement date of April 1, 2022"

The vesting commencement date is the starting point when an employee begins earning ownership rights to their promised benefits, such as stock options or retirement contributions. Think of it like the day a savings account is opened—only after this date do the benefits start to grow and become fully available over time. It matters to investors because it marks when the clock begins ticking toward full ownership, affecting the timing and value of these benefits.

monthly anniversary financial

"Installments vest and become exercisable on each monthly anniversary thereafter"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did OMER executive David J. Borges report on August 13, 2026?

He exercised 5,000 stock options at $3.93 and acquired 5,000 common shares, then sold 5,000 shares at $16.95 the same day. The exercise and sale are reported as direct holdings.

Was the August 13, 2026 OMER stock sale by David J. Borges under a Rule 10b5-1 plan?

Yes. The filing states the 5,000-share open market sale was made pursuant to a previously established Rule 10b5-1 trading plan adopted on February 10, 2026, with the trading schedule set at that time.

At what prices did David J. Borges exercise options and sell OMER shares?

He exercised options at an exercise price of $3.93 per share and sold the resulting 5,000 common shares at an open-market sale price of $16.95 per share on August 13, 2026.

How many OMER stock options remain for David J. Borges from this grant after the transaction?

After exercising 5,000 stock options, the filing reports 15,000 options of this award remaining outstanding. These options continue to vest over 48 equal monthly installments starting from April 1, 2022.

How does the Form 4 describe the vesting schedule of David J. Borges’ OMER stock options?

The option vests and becomes exercisable over 48 equal monthly installments, with a vesting commencement date of April 1, 2022. Installments vest and become exercisable on each monthly anniversary thereafter, as described in the footnote.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 08/17/2026 - 07:42 PM EDT

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Borges David J.

(Last)

(First)

(Middle)

201 ELLIOTT AVENUE WEST

(Street)

SEATTLE

WASHINGTON

98119

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
OMEROS CORP [ OMER ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	VP, Finance & CAO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/13/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	08/13/2026		M		5,000	A	$3.93	5,000	D
Common Stock	08/13/2026		S⁽¹⁾		5,000	D	$16.95	0	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock Option (Right to Buy)	$3.93	08/13/2026		M			5,000	⁽²⁾	09/20/2032	Common Stock	5,000	$0	15,000	D

Explanation of Responses:

1. Open market sale pursuant to a previously established Rule 10b5-1 trading plan adopted by the reporting person on February 10, 2026. The trading schedule, including sale periods and the number of shares to be sold, was established at the time of the trading plan's adoption in accordance with Rule 10b5-1 under the Securities Exchange Act of 1934, as amended.

2. This option vests and becomes exercisable over 48 equal monthly installments, with a vesting commencement date of April 1, 2022. Installments vest and become exercisable on each monthly anniversary thereafter.

	/s/ Peter B. Cancelmo, Attorney-in-Fact	08/17/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR