ZENAS BIOPHARMA INC

Ticker: ZBIO CUSIP: 98937L105 Class: Common Stock

EcoR1 Capital, LLC's Holding History (CIK: 0001587114)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 789,500 Value ($000) $28,667 Avg Close $32.89 Range $18.33 - $44.60

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	789,500	$28,667	$32.89	$18.33 - $44.60