NORTHERN TR CORP

Ticker: NTRS CUSIP: 665859104 Class: COM

WAFRA INC.'s Holding History (CIK: 0000920440)

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

Q2 2016

Shares 122,825 Value ($000) $8,138 Avg Close $53.49 Range $47.26 - $57.41

Q1 2016

Shares 122,825 Value ($000) $8,005 Avg Close $47.88 Range $41.46 - $54.24

Q4 2015

Shares 143,287 Value ($000) $10,330 Avg Close $54.64 Range $49.15 - $57.77

Q3 2015

Shares 137,503 Value ($000) $9,372 Avg Close $55.52 Range $49.19 - $59.82

Q2 2015

Shares 140,794 Value ($000) $10,765,000 Avg Close $56.07 Range $51.74 - $59.54

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2016	122,825	$8,138	$53.49	$47.26 - $57.41
Q1 2016	122,825	$8,005	$47.88	$41.46 - $54.24
Q4 2015	143,287	$10,330	$54.64	$49.15 - $57.77
Q3 2015	137,503	$9,372	$55.52	$49.19 - $59.82
Q2 2015	140,794	$10,765,000	$56.07	$51.74 - $59.54