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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1285819	Omeros Corp	OMER	Pharmaceutical Preparations (2834)	911663741

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1472161	Md A Peter Demopulos	1420 Fifth Avenue Suite 2600 Seattle WA 98101-2347		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2011-05-13	19,000	$5.00	118,421	No	4	P	Direct
Common Stock	Acquisiton	2011-05-16	21,000	$4.95	139,421	No	4	P	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Direct
No	4	P	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	164,382	Indirect	By the Demopulos Family Trust

Footnotes

The price reported in Column 4 is a weighted-average price. These shares were purchased in multiple transactions at prices ranging from $4.85 to $5.11, inclusive. The reporting person undertakes to provide Omeros Corporation, any of its common stock holders, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnotes (1) and (2) to this Form 4.
The price reported in Column 4 is a weighted-average price. These shares were purchased in multiple transactions at prices ranging from $4.90 to $4.98, inclusive.
The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose.