TIMKENSTEEL CORP

Ticker: MTUS CUSIP: 887399103 Class: Common Stock

WESTFIELD CAPITAL MANAGEMENT CO LP's Holding History (CIK: 0001177719)

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

Q2 2015

Shares 866,809 Value ($000) $23,395 Avg Close $29.20 Range $25.26 - $32.98

Q1 2015

Shares 965,286 Value ($000) $25,551 Avg Close $28.96 Range $24.81 - $36.81

Q4 2014

Shares 1,020,356 Value ($000) $37,784 Avg Close $36.23 Range $29.65 - $45.20

Q3 2014

Shares 1,122,491 Value ($000) $52,185 Avg Close $45.14 Range $38.50 - $49.75

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2015	866,809	$23,395	$29.20	$25.26 - $32.98
Q1 2015	965,286	$25,551	$28.96	$24.81 - $36.81
Q4 2014	1,020,356	$37,784	$36.23	$29.65 - $45.20
Q3 2014	1,122,491	$52,185	$45.14	$38.50 - $49.75