MDU RES GROUP INC

Ticker: MDU CUSIP: 552690109 Class: COM

Pinkerton Retirement Specialists, LLC's Holding History (CIK: 0001536446)

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

Q3 2018

Shares 581 Value ($000) $15 Avg Close $8.58 Range $7.77 - $9.02

Q2 2018

Shares 581 Value ($000) $17 Avg Close $8.49 Range $8.18 - $8.87

Q1 2018

Shares 581 Value ($000) $16 Avg Close $8.03 Range $7.29 - $8.53

Q4 2017

Shares 581 Value ($000) $16 Avg Close $8.04 Range $7.71 - $8.41

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2018	581	$15	$8.58	$7.77 - $9.02
Q2 2018	581	$17	$8.49	$8.18 - $8.87
Q1 2018	581	$16	$8.03	$7.29 - $8.53
Q4 2017	581	$16	$8.04	$7.71 - $8.41