NORTHERN TR CORP

Ticker: NTRS CUSIP: 665859104 Class: COM

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

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

Q3 2016

Shares 12,096 Value ($000) $822 Avg Close $52.45 Range $47.67 - $55.52

Q2 2016

Shares 12,096 Value ($000) $801 Avg Close $53.49 Range $47.26 - $57.41

Q1 2016

Shares 12,096 Value ($000) $788 Avg Close $47.88 Range $41.46 - $54.24

Q4 2015

Shares 12,096 Value ($000) $872 Avg Close $54.64 Range $49.15 - $57.77

Q3 2015

Shares 12,096 Value ($000) $824 Avg Close $55.52 Range $49.19 - $59.82

Q2 2015

Shares 12,096 Value ($000) $925 Avg Close $56.07 Range $51.74 - $59.54

Q1 2015

Shares 12,096 Value ($000) $842 Avg Close $51.14 Range $45.68 - $54.62

Q4 2014

Shares 12,096 Value ($000) $815 Avg Close $49.58 Range $45.22 - $51.59

Q3 2014

Shares 12,096 Value ($000) $823 Avg Close $49.84 Range $46.73 - $52.70

Q2 2014

Shares 12,096 Value ($000) $777 Avg Close $45.46 Range $42.93 - $48.59

Q1 2014

Shares 12,096 Value ($000) $793 Avg Close $45.55 Range $42.73 - $49.47

Q4 2013

Shares 12,096 Value ($000) $749 Avg Close $41.82 Range $38.19 - $45.43

Q3 2013

Shares 12,096 Value ($000) $658 Avg Close $41.67 Range $39.30 - $44.95

Q2 2013

Shares 12,096 Value ($000) $700 Avg Close $40.35 Range $37.41 - $42.83

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2016	12,096	$822	$52.45	$47.67 - $55.52
Q2 2016	12,096	$801	$53.49	$47.26 - $57.41
Q1 2016	12,096	$788	$47.88	$41.46 - $54.24
Q4 2015	12,096	$872	$54.64	$49.15 - $57.77
Q3 2015	12,096	$824	$55.52	$49.19 - $59.82
Q2 2015	12,096	$925	$56.07	$51.74 - $59.54
Q1 2015	12,096	$842	$51.14	$45.68 - $54.62
Q4 2014	12,096	$815	$49.58	$45.22 - $51.59
Q3 2014	12,096	$823	$49.84	$46.73 - $52.70
Q2 2014	12,096	$777	$45.46	$42.93 - $48.59
Q1 2014	12,096	$793	$45.55	$42.73 - $49.47
Q4 2013	12,096	$749	$41.82	$38.19 - $45.43
Q3 2013	12,096	$658	$41.67	$39.30 - $44.95
Q2 2013	12,096	$700	$40.35	$37.41 - $42.83