Vanguard Group’s OmniAb OABI Stock Holding History

Vanguard Group’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
2025 Q4	$10.4M	Buy	5,625,197 +477,136	+9%	+$829K	﹤0.01%	2948
2025 Q3	$8.24M	Sell	5,148,061 -120,254	-2%	-$220K	﹤0.01%	3076
2025 Q2	$9.17M	Buy	5,268,315 +89,009	+2%	+$149K	﹤0.01%	2950
2025 Q1	$12.4M	Buy	5,179,306 +123,996	+2%	+$406K	﹤0.01%	2730
2024 Q4	$17.9M	Sell	5,055,310 -136,375	-3%	-$540K	﹤0.01%	2638
2024 Q3	$22M	Buy	5,191,685 +606,283	+13%	+$2.62M	﹤0.01%	2550
2024 Q2	$17.2M	Sell	4,585,402 -1,128,137	-20%	-$5.14M	﹤0.01%	2648
2024 Q1	$31M	Buy	5,713,539 +62,131	+1%	+$358K	﹤0.01%	2383
2023 Q4	$34.9M	Buy	5,651,408 +155,464	+3%	+$765K	﹤0.01%	2339
2023 Q3	$28.5M	Sell	5,495,944 -197,950	-3%	-$1.06M	﹤0.01%	2398
2023 Q2	$28.6M	Buy	5,693,894 +16,353	+0.3%	+$66.3K	﹤0.01%	2434
2023 Q1	$20.9M	Sell	5,677,541 -726,242	-11%	-$2.74M	﹤0.01%	2568
2022 Q4	$23.1M	Buy	+6,403,783	New	+$33.6M	﹤0.01%	2552

Other funds holding OABI

WCM

Whitefort Capital Management New York $339M AUM 52.48% 1-Year Est. Return

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

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

PMG

Private Management Group Irvine, California $3.8B AUM 23.19% 1-Year Est. Return

RHJA

Rice Hall James & Associates San Diego, California $1.8B AUM 36.16% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

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

TowerView LLC New York $155M AUM 30.14% 1-Year Est. Return

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

Vanguard Group's OABI Position: Q4 2025 in Review

Vanguard Group increased its OmniAb (OABI) stake by 9.3% in Q4 2025, buying an estimated $829K and bringing the position to 5,625,197 shares worth $10.4M. The position accounts for ﹤0.01% of the portfolio, ranked #2948.

Vanguard Group first reported a position in OABI in Q4 2022 and has held it in 13 quarters since. The position peaked at $34.9M in Q4 2023. 129 funds tracked by Wall St. Rank hold OABI as of Q4 2025.

Vanguard Group held 5,625,197 shares of OmniAb worth $10.4M as of Q4 2025.
Vanguard Group bought 477,136 OmniAb shares in Q4 2025, an estimated $829K.
OmniAb made up ﹤0.01% of Vanguard Group's portfolio in Q4 2025, its #2948 holding.
Vanguard Group first reported a position in OmniAb in Q4 2022 and has held it in 13 quarters since.
Vanguard Group's OmniAb position peaked at $34.9M in Q4 2023.
129 funds tracked by Wall St. Rank held OmniAb as of Q4 2025.

Based on Vanguard Group's 13F filing for Q4 2025, filed 29 Jan 2026.