ARCELLX INC

Ticker: ACLX CUSIP: 03940C100 Class: Common Stock

Optiver Holding B.V.'s Holding History (CIK: 0001859606)

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

Q4 2025

Shares 44 Value ($000) $3 Avg Close $79.78 Range $63.03 - $94.07

Q3 2025

Shares 258 Value ($000) $21 Avg Close $71.99 Range $63.13 - $83.08

Q2 2025

Shares 130 Value ($000) $9 Avg Close $62.26 Range $47.86 - $69.84

Q1 2025

Shares 40 Value ($000) $3 Avg Close $67.74 Range $57.17 - $81.00

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	44	$3	$79.78	$63.03 - $94.07
Q3 2025	258	$21	$71.99	$63.13 - $83.08
Q2 2025	130	$9	$62.26	$47.86 - $69.84
Q1 2025	40	$3	$67.74	$57.17 - $81.00