OMEROS CORP

Ticker: OMER CUSIP: 682143102 Class: COM

BAKER BROS. ADVISORS LP's Holding History (CIK: 0001263508)

Note: Option positions (PUT/CALL) are excluded.

Q1 2016

Shares 749,250 Value ($000) $11,493 Avg Close $12.15 Range $8.90 - $16.80

Q4 2015

Shares 336,226 Value ($000) $5,289 Avg Close $13.81 Range $10.69 - $16.52

Q3 2015

Shares 336,226 Value ($000) $3,685 Avg Close $15.57 Range $10.48 - $30.23

Q2 2015

Shares 964,621 Value ($000) $17,354 Avg Close $21.58 Range $17.62 - $26.64

Q1 2015

Shares 637,446 Value ($000) $14,043 Avg Close $22.83 Range $18.51 - $27.64

Q4 2014

Shares 648,101 Value ($000) $16,060 Avg Close $18.22 Range $11.18 - $25.10

Q3 2014

Shares 808,775 Value ($000) $10,288 Avg Close $14.00 Range $12.12 - $18.80

Q2 2014

Shares 753,804 Value ($000) $13,116 Avg Close $12.61 Range $9.76 - $18.01

Q1 2014

Shares 753,804 Value ($000) $9,098 Avg Close $12.28 Range $10.11 - $14.69

Q4 2013

Shares 608,404 Value ($000) $6,869 Avg Close $9.65 Range $6.92 - $13.76

Q3 2013

Shares 608,404 Value ($000) $5,932 Avg Close $5.96 Range $4.75 - $10.70

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2016	749,250	$11,493	$12.15	$8.90 - $16.80
Q4 2015	336,226	$5,289	$13.81	$10.69 - $16.52
Q3 2015	336,226	$3,685	$15.57	$10.48 - $30.23
Q2 2015	964,621	$17,354	$21.58	$17.62 - $26.64
Q1 2015	637,446	$14,043	$22.83	$18.51 - $27.64
Q4 2014	648,101	$16,060	$18.22	$11.18 - $25.10
Q3 2014	808,775	$10,288	$14.00	$12.12 - $18.80
Q2 2014	753,804	$13,116	$12.61	$9.76 - $18.01
Q1 2014	753,804	$9,098	$12.28	$10.11 - $14.69
Q4 2013	608,404	$6,869	$9.65	$6.92 - $13.76
Q3 2013	608,404	$5,932	$5.96	$4.75 - $10.70