Sec Form 4 Filing - JACOBSEN MICHAEL A @ OMEROS CORP - 2017-06-16

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

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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person JACOBSEN MICHAEL A 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 and CAO (Last) (First) (Middle) 201 ELLIOTT AVENUE WEST 3. Date of Earliest Transaction (MM/DD/YY) 06/16/2017 (Street) SEATTLE, WA98119 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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) Code V Amount (A) or (D) Price Common Stock 06/16/2017 M 14,000 A $ 9.37 19,500 D Common Stock 06/16/2017 S( 1 ) 12,000 D $ 24.95 7,500 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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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 of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Stock Option (Right to Buy) $ 9.37 06/16/2017 M 14,000 ( 2 ) 09/24/2023 Common Stock 14,000 $ 0 60,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other JACOBSEN MICHAEL A 201 ELLIOTT AVENUE WEST SEATTLE, WA98119 VP Finance and CAO Signatures /s/ Marcia S. Kelbon, attorney-in-fact on behalf of Michael A. Jacobsen 06/16/2017 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Open market sale pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 2, 2016, 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. The closing price of the issuer's common stock on June 2, 2016 was $11.91 per share. This Rule 10b5-1 plan provides for fixed sales of a total of 36,000 shares from August 15, 2016 through August 15, 2017. This sale of 12,000 shares is the result of the third and final trade pursuant to this trading plan. ( 2 )25% of the total number of shares subject to this option vested on September 3, 2014, which was the 12-month anniversary of the grant date, and the remaining shares subject to the option vest and become exercisable in equal monthly installments over the 48 months following the initial vesting date.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

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