OMEROS CORP — Director's Dealing 2018

May 17, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: OMEROS CORP (OMER)
CIK: 0001285819
Period of Report: 2018-05-14

Reporting Person: JACOBSEN MICHAEL A (VP Finance and CAO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-05-14	Common Stock	M	10980	$9.37	Acquired	19480	Direct
2018-05-14	Common Stock	S	10980	$22.45	Disposed	8500	Direct
2018-05-15	Common Stock	M	12812	$9.37	Acquired	21312	Direct
2018-05-15	Common Stock	S	12812	$24.95	Disposed	8500	Direct
2018-05-15	Common Stock	M	5000	$9.37	Acquired	13500	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-05-14	Stock Option
(Right to Buy)	$9.37	M	10980	Disposed	2023-09-24	Common Stock (10980)	Direct
2018-05-15	Stock Option
(Right to Buy)	$9.37	M	12812	Disposed	2023-09-24	Common Stock (12812)	Direct
2018-05-15	Stock Option
(Right to Buy)	$9.37	M	5000	Disposed	2023-09-24	Common Stock (5000)	Direct

Footnotes

F1: Open market sale pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 15, 2017, at which time the trading schedule, including sale periods, price and the number of shares to be sold, was established in accordance with Rule 10b5-1 under the Securities Exchange Act of 1934, as amended.

F2: 25% of the total number of shares subject to this option vested on September 3, 2014, and the remaining shares subject to the option vested and became exercisable in equal monthly installments over the 36 months following the initial vesting date.

F3: On May 15, 2018, the reporting person paid the exercise price and exercised options to purchase 5,000 shares of the company's common stock. These shares have not been sold and are held for the account of the reporting person. The options exercised in this transaction have the same vesting terms described in footnote 2.