CENTURY ALUM CO

Ticker: CENX CUSIP: 156431108 Class: EQTY

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's Holding History (CIK: 0001644956)

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

Q4 2022

Shares 871,261 Value ($000) $7,127 Avg Close $7.55 Range $5.32 - $10.23

Q3 2022

Shares 865,169 Value ($000) $4,568 Avg Close $7.60 Range $5.27 - $10.21

Q2 2022

Shares 1,731,586 Value ($000) $12,762 Avg Close $15.54 Range $6.93 - $29.24

Q1 2022

Shares 1,828,591 Value ($000) $48,110 Avg Close $21.04 Range $14.85 - $30.36

Q4 2021

Shares 2,434,629 Value ($000) $40,317 Avg Close $14.64 Range $12.34 - $17.65

Q3 2021

Shares 1,621,036 Value ($000) $21,803 Avg Close $12.57 Range $10.39 - $15.09

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2022	871,261	$7,127	$7.55	$5.32 - $10.23
Q3 2022	865,169	$4,568	$7.60	$5.27 - $10.21
Q2 2022	1,731,586	$12,762	$15.54	$6.93 - $29.24
Q1 2022	1,828,591	$48,110	$21.04	$14.85 - $30.36
Q4 2021	2,434,629	$40,317	$14.64	$12.34 - $17.65
Q3 2021	1,621,036	$21,803	$12.57	$10.39 - $15.09