HUDBAY MINERALS INC

Ticker: HBM CUSIP: 443628102 Class: Stock

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

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

Q1 2018

Shares 877,678 Value ($000) $6,209 Avg Close $8.35 Range $6.65 - $10.25

Q4 2017

Shares 2,340,112 Value ($000) $20,770 Avg Close $7.80 Range $6.85 - $9.10

Q3 2017

Shares 2,411,046 Value ($000) $17,832 Avg Close $7.53 Range $5.50 - $9.35

Q1 2017

Shares 278,655 Value ($000) $1,826 Avg Close $7.47 Range $5.75 - $9.15

Q4 2016

Shares 228,426 Value ($000) $1,308 Avg Close $5.35 Range $3.67 - $7.35

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2018	877,678	$6,209	$8.35	$6.65 - $10.25
Q4 2017	2,340,112	$20,770	$7.80	$6.85 - $9.10
Q3 2017	2,411,046	$17,832	$7.53	$5.50 - $9.35
Q1 2017	278,655	$1,826	$7.47	$5.75 - $9.15
Q4 2016	228,426	$1,308	$5.35	$3.67 - $7.35