CENTURY ALUM CO

Ticker: CENX CUSIP: 156431108 Class: EQTY

Capital World Investors's Holding History (CIK: 0001422849)

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

Q2 2018

Shares 3,300,000 Value ($000) $51,975 Avg Close $16.93 Range $14.14 - $20.19

Q1 2018

Shares 4,926,000 Value ($000) $81,476 Avg Close $20.90 Range $15.56 - $24.77

Q4 2017

Shares 2,059,000 Value ($000) $40,439 Avg Close $15.31 Range $13.00 - $20.30

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2018	3,300,000	$51,975	$16.93	$14.14 - $20.19
Q1 2018	4,926,000	$81,476	$20.90	$15.56 - $24.77
Q4 2017	2,059,000	$40,439	$15.31	$13.00 - $20.30