QUANTUM SI INC

Ticker: QSI CUSIP: 74765K105 Class: Common Stock

AMERICAN CENTURY COMPANIES INC's Holding History (CIK: 0000748054)

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

Q2 2025

Shares 12,036 Value ($000) $24 Avg Close $1.48 Range $1.02 - $2.15

Q1 2024

Shares 31,982 Value ($000) $63 Avg Close $1.75 Range $1.38 - $2.43

Q3 2023

Shares 28,169 Value ($000) $47 Avg Close $2.41 Range $1.57 - $3.90

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2025	12,036	$24	$1.48	$1.02 - $2.15
Q1 2024	31,982	$63	$1.75	$1.38 - $2.43
Q3 2023	28,169	$47	$2.41	$1.57 - $3.90