3M CO

Ticker: MMM CUSIP: 88579Y101 Class: COM

GARDNER RUSSO & QUINN LLC's Holding History (CIK: 0000860643)

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

Q1 2019

Shares 1,140 Value ($000) $237 Avg Close $131.07 Range $118.62 - $138.19

Q4 2018

Shares 1,140 Value ($000) $217 Avg Close $128.25 Range $114.72 - $140.01

Q3 2018

Shares 1,140 Value ($000) $240 Avg Close $132.20 Range $121.95 - $140.35

Q2 2018

Shares 1,425 Value ($000) $280 Avg Close $130.14 Range $121.67 - $140.90

Q1 2018

Shares 1,425 Value ($000) $313 Avg Close $150.16 Range $136.48 - $164.13

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2019	1,140	$237	$131.07	$118.62 - $138.19
Q4 2018	1,140	$217	$128.25	$114.72 - $140.01
Q3 2018	1,140	$240	$132.20	$121.95 - $140.35
Q2 2018	1,425	$280	$130.14	$121.67 - $140.90
Q1 2018	1,425	$313	$150.16	$136.48 - $164.13