3M CO

Ticker: MMM CUSIP: 88579Y101 Class: COM

Barton Investment Management's Holding History (CIK: 0001387818)

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

Q1 2016

Shares 7,630 Value ($000) $1,271 Avg Close $92.76 Range $80.95 - $101.43

Q4 2015

Shares 600 Value ($000) $90 Avg Close $92.11 Range $82.77 - $96.10

Q3 2013

Shares 1,780 Value ($000) $213 Avg Close $65.98 Range $61.25 - $69.59

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2016	7,630	$1,271	$92.76	$80.95 - $101.43
Q4 2015	600	$90	$92.11	$82.77 - $96.10
Q3 2013	1,780	$213	$65.98	$61.25 - $69.59