OMNIAB INC (OABI) Stock Institutional Trading Activity


OMNIAB INC (OABI) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC and Arbiter Partners Capital Management. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2025Arbiter Partners Capital ManagementBuy32,056192,585$356,282
Q4 2025Renaissance Technologies LLCSell-280,754242,700$448,995
Q3 2025Arbiter Partners Capital ManagementBuy160,529160,529$256,846
Q3 2025Renaissance Technologies LLCSell-184,096523,454$837,526
Q2 2025Renaissance Technologies LLCBuy680,950707,550$1,231,137
Q1 2025Renaissance Technologies LLCSell-14,35926,600$63,840
Q4 2023Renaissance Technologies LLCSell-39,00040,959$253
Q3 2023Renaissance Technologies LLCSell-59,90079,959$415
Q2 2023Renaissance Technologies LLCBuy139,859139,859$703

Frequently asked questions about OABI activity

  • Which institutional owners are buying OABI?

    Institutional owners buying OABI include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in OABI activity?

    "Buy" means an investor increased their reported position in OABI compared to the prior reporting period. This reflects growing exposure to OMNIAB INC (OABI) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in OABI increasing?

    Institutional interest in OABI can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.