NORTHERN TR CORP

Ticker: NTRS CUSIP: 665859104 Class: COM

Robeco Schweiz AG's Holding History (CIK: 0001418427)

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

Q4 2013

Shares 11,000 Value ($000) $679 Avg Close $41.82 Range $38.19 - $45.43

Q3 2013

Shares 10,000 Value ($000) $548 Avg Close $41.67 Range $39.30 - $44.95

Q2 2013

Shares 15,200 Value ($000) $886 Avg Close $40.35 Range $37.41 - $42.83

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2013	11,000	$679	$41.82	$38.19 - $45.43
Q3 2013	10,000	$548	$41.67	$39.30 - $44.95
Q2 2013	15,200	$886	$40.35	$37.41 - $42.83