Citadel Advisors
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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
Q2 		$82.9K Buy
33,700
+21,100
+167% +$41.9K ﹤0.01% 12822
2026
Q1 		$19.8K Sell
12,600
-13,400
-52% -$24.2K ﹤0.01% 12673
2025
Q4 		$48.1K Sell
26,000
-200
-0.8% -$348 ﹤0.01% 12054
2025
Q3 		$41.9K Buy
+26,200
New +$47.9K ﹤0.01% 12274
2025
Q2 		– Sell
-1,000
Closed -$2.4K – 14300
2025
Q1 		$2.4K Sell
1,000
-9,100
-90% -$29.8K ﹤0.01% 14043
2024
Q4 		$35.8K Buy
10,100
+4,700
+87% +$18.6K ﹤0.01% 12719
2024
Q3 		$22.8K Buy
5,400
+4,400
+440% +$19K ﹤0.01% 12680
2024
Q2 		$3.75K Sell
1,000
-8,000
-89% -$36.5K ﹤0.01% 13554
2024
Q1 		$48.8K Sell
9,000
-8,900
-50% -$51.3K ﹤0.01% 12194
2023
Q4 		$110K Buy
17,900
+10,600
+145% +$52.1K ﹤0.01% 10809
2023
Q3 		$37.9K Sell
7,300
-15,600
-68% -$83.3K ﹤0.01% 12058
2023
Q2 		$115K Buy
22,900
+1,720
+8% +$6.97K ﹤0.01% 10720
2023
Q1 		$77.9K Sell
21,180
-8,720
-29% -$32.9K ﹤0.01% 11598
2022
Q4 		$108K Buy
+29,900
New +$157K ﹤0.01% 11114

Other funds holding OABI

WCM
Whitefort Capital Management New York $406M AUM 84.26% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Nomura Holdings
Nomura Holdings Tokyo, Japan $85.4B AUM 91.09% 1-Year Est. Return
CCM
Cadian Capital Management New York $1.32B AUM 4.19% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
RHJA
Rice Hall James & Associates San Diego, California $2.05B AUM 43.16% 1-Year Est. Return
PMG
Private Management Group Irvine, California $3.8B AUM 23.19% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Citadel Advisors's OABI Position: Q2 2026 in Review

Citadel Advisors reduced its OmniAb (OABI) stake by 75% in Q2 2026, selling an estimated $338K and leaving 58,190 shares worth $143K. The position accounts for ﹤0.01% of the portfolio, ranked #12390.

Citadel Advisors first reported a position in OABI in Q4 2021 and has held it in 17 quarters since. The position peaked at $13.3M in Q4 2021. 131 funds tracked by Wall St. Rank hold OABI as of Q2 2026.

  • Citadel Advisors held 58,190 shares of OmniAb worth $143K as of Q2 2026.
  • Citadel Advisors sold 170,494 OmniAb shares in Q2 2026, an estimated $338K.
  • OmniAb made up ﹤0.01% of Citadel Advisors's portfolio in Q2 2026, its #12390 holding.
  • Citadel Advisors first reported a position in OmniAb in Q4 2021 and has held it in 17 quarters since.
  • Citadel Advisors's OmniAb position peaked at $13.3M in Q4 2021.
  • 131 funds tracked by Wall St. Rank held OmniAb as of Q2 2026.

Based on Citadel Advisors's 13F filing for Q2 2026, filed 14 Aug 2026.