Citadel Advisors
OABI icon

Citadel Advisors’s OmniAb OABI Stock Holding History

Citadel Advisors’s Portfolio OABI Stock Details OABI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$359K Sell
228,684
-56,450
-20% -$102K ﹤0.01% 10061
2025
Q4 		$527K Sell
285,134
-551,665
-66% -$959K ﹤0.01% 8900
2025
Q3 		$1.34M Sell
836,799
-1,295,793
-61% -$2.37M ﹤0.01% 6905
2025
Q2 		$3.71M Buy
2,132,592
+1,938,568
+999% +$3.24M ﹤0.01% 4617
2025
Q1 		$466K Sell
194,024
-243,946
-56% -$798K ﹤0.01% 8632
2024
Q4 		$1.55M Buy
437,970
+163,115
+59% +$645K ﹤0.01% 6157
2024
Q3 		$1.16M Buy
274,855
+219,446
+396% +$949K ﹤0.01% 6567
2024
Q2 		$208K Sell
55,409
-15,773
-22% -$71.9K ﹤0.01% 9849
2024
Q1 		$386K Buy
71,182
+57,273
+412% +$330K ﹤0.01% 8930
2023
Q4 		$85.8K Sell
13,909
-90,830
-87% -$447K ﹤0.01% 11127
2023
Q3 		$544K Buy
104,739
+101,517
+3,151% +$542K ﹤0.01% 7872
2023
Q2 		$16.2K Sell
3,222
-367,831
-99% -$1.49M ﹤0.01% 12906
2023
Q1 		$1.37M Sell
371,053
-745,914
-67% -$2.82M ﹤0.01% 6111
2022
Q4 		$4.02M Buy
+1,116,967
New +$5.86M ﹤0.01% 4238
2022
Q2 		– Sell
-1,000,670
Closed -$10.1M – 13730
2022
Q1 		$10.1M Sell
1,000,670
-334,277
-25% -$3.34M ﹤0.01% 2938
2021
Q4 		$13.3M Buy
+1,334,947
New +$13.3M ﹤0.01% 2598

Other funds holding OABI

WCM
Whitefort Capital Management New York $339M AUM 52.48% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
CCM
Cadian Capital Management New York $821M AUM 14.36% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
RHJA
Rice Hall James & Associates San Diego, California $1.8B AUM 36.16% 1-Year Est. Return
PMG
Private Management Group Irvine, California $3.47B AUM 13.39% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
TL
TowerView LLC New York $155M AUM 30.14% 1-Year Est. Return

Citadel Advisors's OABI Position: Q1 2026 in Review

Citadel Advisors reduced its OmniAb (OABI) stake by 20% in Q1 2026, selling an estimated $102K and leaving 228,684 shares worth $359K. The position accounts for ﹤0.01% of the portfolio, ranked #10061.

Citadel Advisors first reported a position in OABI in Q4 2021 and has held it in 16 quarters since. The position peaked at $13.3M in Q4 2021. 128 funds tracked by Wall St. Rank hold OABI as of Q1 2026.

  • Citadel Advisors held 228,684 shares of OmniAb worth $359K as of Q1 2026.
  • Citadel Advisors sold 56,450 OmniAb shares in Q1 2026, an estimated $102K.
  • OmniAb made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #10061 holding.
  • Citadel Advisors first reported a position in OmniAb in Q4 2021 and has held it in 16 quarters since.
  • Citadel Advisors's OmniAb position peaked at $13.3M in Q4 2021.
  • 128 funds tracked by Wall St. Rank held OmniAb as of Q1 2026.

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