Citadel Advisors’s Omeros OMER Stock Holding History

Citadel Advisors’s Portfolio OMER Stock Details OMER Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$2.47M	Sell	234,300 -174,100	-43%	-$2.05M	﹤0.01%	5649
2025 Q4	$7.01M	Buy	408,400 +84,200	+26%	+$725K	﹤0.01%	3756
2025 Q3	$1.33M	Buy	324,200 +93,700	+41%	+$372K	﹤0.01%	6923
2025 Q2	$692K	Buy	230,500 +20,600	+10%	+$103K	﹤0.01%	7864
2025 Q1	$1.73M	Buy	209,900 +31,700	+18%	+$280K	﹤0.01%	5819
2024 Q4	$1.76M	Buy	178,200 +66,700	+60%	+$458K	﹤0.01%	5893
2024 Q3	$443K	Buy	111,500 +26,500	+31%	+$113K	﹤0.01%	8516
2024 Q2	$345K	Buy	85,000 +6,200	+8%	+$22.2K	﹤0.01%	8864
2024 Q1	$272K	Buy	78,800 +14,300	+22%	+$54.4K	﹤0.01%	9684
2023 Q4	$211K	Sell	64,500 -17,300	-21%	-$36.5K	﹤0.01%	9855
2023 Q3	$239K	Buy	81,800 +46,100	+129%	+$185K	﹤0.01%	9579
2023 Q2	$194K	Sell	35,700 -1,700	-5%	-$9.93K	﹤0.01%	9941
2023 Q1	$174K	Sell	37,400 -63,100	-63%	-$228K	﹤0.01%	10405
2022 Q4	$227K	Sell	100,500 -65,500	-39%	-$181K	﹤0.01%	9888
2022 Q3	$523K	Buy	166,000 +76,100	+85%	+$353K	﹤0.01%	8362
2022 Q2	$247K	Buy	89,900 +13,400	+18%	+$45.4K	﹤0.01%	10242
2022 Q1	$460K	Sell	76,500 -5,500	-7%	-$34.3K	﹤0.01%	9590
2021 Q4	$527K	Buy	82,000 +7,600	+10%	+$55.1K	﹤0.01%	9573
2021 Q3	$1.03M	Sell	74,400 -83,200	-53%	-$1.25M	﹤0.01%	8090
2021 Q2	$2.34M	Buy	157,600 +79,800	+103%	+$1.34M	﹤0.01%	6206
2021 Q1	$1.39M	Sell	77,800 -3,600	-4%	-$70K	﹤0.01%	7310
2020 Q4	$1.16M	Sell	81,400 -24,400	-23%	-$298K	﹤0.01%	6482
2020 Q3	$1.07M	Buy	105,800 +33,900	+47%	+$436K	﹤0.01%	5922
2020 Q2	$1.06M	Buy	71,900 +3,700	+5%	+$55.2K	﹤0.01%	5734
2020 Q1	$912K	Sell	68,200 -4,400	-6%	-$58.5K	﹤0.01%	5509
2019 Q4	$1.02M	Buy	72,600 +16,800	+30%	+$246K	﹤0.01%	5537
2019 Q3	$911K	Sell	55,800 -7,000	-11%	-$120K	﹤0.01%	5756
2019 Q2	$985K	Buy	62,800 +10,100	+19%	+$181K	﹤0.01%	5722
2019 Q1	$915K	Sell	52,700 -82,200	-61%	-$1.19M	﹤0.01%	5744
2018 Q4	$1.5M	Buy	134,900 +3,800	+3%	+$53.3K	﹤0.01%	4625
2018 Q3	$3.2M	Buy	131,100 +70,100	+115%	+$1.56M	﹤0.01%	3621
2018 Q2	$1.11M	Buy	61,000 +300	+0.5%	+$5.2K	﹤0.01%	5036
2018 Q1	$678K	Buy	60,700 +18,300	+43%	+$257K	﹤0.01%	5383
2017 Q4	$824K	Sell	42,400 -4,200	-9%	-$78.8K	﹤0.01%	4931
2017 Q3	$1.01M	Buy	46,600 +33,100	+245%	+$701K	﹤0.01%	4316
2017 Q2	$269K	Sell	13,500 -12,400	-48%	-$216K	﹤0.01%	6080
2017 Q1	$392K	Buy	+25,900	New	+$283K	﹤0.01%	5446
2016 Q1	–	Sell	-18,000	Closed	-$283K	–	7619
2015 Q4	$283K	Sell	18,000 -21,900	-55%	-$303K	﹤0.01%	5295
2015 Q3	$437K	Buy	39,900 +2,000	+5%	+$31.1K	﹤0.01%	4992
2015 Q2	$682K	Buy	37,900 +21,100	+126%	+$455K	﹤0.01%	4507
2015 Q1	$370K	Buy	16,800 +5,000	+42%	+$114K	﹤0.01%	5362
2014 Q4	$292K	Sell	11,800 -1,700	-13%	-$31K	﹤0.01%	5480
2014 Q3	$172K	Buy	13,500 +5,700	+73%	+$79.8K	﹤0.01%	5884
2014 Q2	$136K	Sell	7,800 -3,300	-30%	-$41.6K	﹤0.01%	5950
2014 Q1	$134K	Buy	11,100 +700	+7%	+$8.6K	﹤0.01%	5901
2013 Q4	$117K	Buy	+10,400	New	+$100K	﹤0.01%	5485

Other funds holding OMER

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

ISL

Ingalls & Snyder LLC New York $2.83B AUM 21.61% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Stifel Financial St. Louis, Missouri $109B AUM 21.36% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Corient Private Wealth Miami, Florida $69.9B AUM 22.19% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Charles Schwab San Francisco, California $654B AUM 26.35% 1-Year Est. Return

Citadel Advisors's OMER Position: Q1 2026 in Review

Citadel Advisors increased its Omeros (OMER) stake by 8.2% in Q1 2026, buying an estimated $232K and bringing the position to 260,048 shares worth $2.75M. The position accounts for ﹤0.01% of the portfolio, ranked #5441.

Citadel Advisors first reported a position in OMER in Q4 2013 and has held it in 39 quarters since. The position peaked at $12.6M in Q3 2018. 161 funds tracked by Wall St. Rank hold OMER as of Q1 2026.

Citadel Advisors held 260,048 shares of Omeros worth $2.75M as of Q1 2026.
Citadel Advisors bought 19,696 Omeros shares in Q1 2026, an estimated $232K.
Omeros made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #5441 holding.
Citadel Advisors first reported a position in Omeros in Q4 2013 and has held it in 39 quarters since.
Citadel Advisors's Omeros position peaked at $12.6M in Q3 2018.
161 funds tracked by Wall St. Rank held Omeros as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.