JY
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Jeff Yass’s OmniAb OABI Stock Holding History

Jeff Yass’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
2024
Q3 		– Sell
-30,100
Closed -$113K – 12718
2024
Q2 		$113K Sell
30,100
-12,400
-29% -$56.5K ﹤0.01% 10935
2024
Q1 		$230K Buy
42,500
+5,400
+15% +$31.1K ﹤0.01% 10292
2023
Q4 		$229K Sell
37,100
-16,500
-31% -$81.1K ﹤0.01% 10397
2023
Q3 		$278K Buy
53,600
+23,700
+79% +$126K ﹤0.01% 9521
2023
Q2 		$150K Buy
+29,900
New +$121K ﹤0.01% 10572

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

Jeff Yass's OABI Position: Q2 2026 in Review

Jeff Yass reduced its OmniAb (OABI) stake by 14% in Q2 2026, selling an estimated $11.8K and leaving 35,691 shares worth $87.8K. The position accounts for ﹤0.01% of the portfolio, ranked #12583.

Jeff Yass first reported a position in OABI in Q1 2023 and has held it in 12 quarters since. The position peaked at $283K in Q1 2025. 131 funds tracked by Wall St. Rank hold OABI as of Q2 2026.

  • Jeff Yass held 35,691 shares of OmniAb worth $87.8K as of Q2 2026.
  • Jeff Yass sold 5,938 OmniAb shares in Q2 2026, an estimated $11.8K.
  • OmniAb made up ﹤0.01% of Jeff Yass's portfolio in Q2 2026, its #12583 holding.
  • Jeff Yass first reported a position in OmniAb in Q1 2023 and has held it in 12 quarters since.
  • Jeff Yass's OmniAb position peaked at $283K in Q1 2025.
  • 131 funds tracked by Wall St. Rank held OmniAb as of Q2 2026.

Based on Susquehanna International Group's 13F filing for Q2 2026, filed 14 Aug 2026.