Isthmus Partners’s OmniAb OABI Stock Holding History

Isthmus Partners’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	$1.19M	Buy	756,674 +35,365	+5%	+$63.8K	0.12%	121
2025 Q4	$1.33M	Buy	721,309 +52,238	+8%	+$90.8K	0.15%	115
2025 Q3	$1.07M	Buy	669,071 +101,028	+18%	+$185K	0.24%	62
2025 Q2	$988K	Buy	568,043 +99,336	+21%	+$166K	0.12%	114
2025 Q1	$1.12M	Buy	468,707 +15,572	+3%	+$51K	0.14%	113
2024 Q4	$1.6M	Buy	453,135 +7,001	+2%	+$27.7K	0.2%	107
2024 Q3	$1.89M	Sell	446,134 -82,251	-16%	-$356K	0.22%	96
2024 Q2	$1.98M	Buy	528,385 +143,387	+37%	+$653K	0.23%	102
2024 Q1	$2.09M	Buy	384,998 +74,224	+24%	+$428K	0.24%	103
2023 Q4	$1.92M	Buy	310,774 +48,138	+18%	+$237K	0.25%	89
2023 Q3	$1.36M	Buy	262,636 +3,615	+1%	+$19.3K	0.2%	104
2023 Q2	$1.3M	Sell	259,021 -1,223	-0.5%	-$4.96K	0.18%	105
2023 Q1	$958K	Buy	260,244 +68,171	+35%	+$257K	0.14%	113
2022 Q4	$691K	Buy	+192,073	New	+$1.01M	0.1%	120

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

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

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

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

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

Isthmus Partners's OABI Position: Q1 2026 in Review

Isthmus Partners increased its OmniAb (OABI) stake by 4.9% in Q1 2026, buying an estimated $63.8K and bringing the position to 756,674 shares worth $1.19M. The position accounts for 0.12% of the portfolio, ranked #121.

Isthmus Partners first reported a position in OABI in Q4 2022 and has held it in 14 quarters since. The position peaked at $2.09M in Q1 2024. 128 funds tracked by Wall St. Rank hold OABI as of Q1 2026.

Isthmus Partners held 756,674 shares of OmniAb worth $1.19M as of Q1 2026.
Isthmus Partners bought 35,365 OmniAb shares in Q1 2026, an estimated $63.8K.
OmniAb made up 0.12% of Isthmus Partners's portfolio in Q1 2026, its #121 holding.
Isthmus Partners first reported a position in OmniAb in Q4 2022 and has held it in 14 quarters since.
Isthmus Partners's OmniAb position peaked at $2.09M in Q1 2024.
128 funds tracked by Wall St. Rank held OmniAb as of Q1 2026.

Based on Isthmus Partners's 13F filing for Q1 2026, filed 30 Apr 2026.