DTE ENERGY CO

Ticker: DTE CUSIP: 233331107 Class: COM

American Investment Services, Inc.'s Holding History (CIK: 0001369913)

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

Q2 2015

Shares 2,691 Value ($000) $201 Avg Close $46.82 Range $43.95 - $50.11

Q1 2014

Shares 10,620 Value ($000) $789 Avg Close $39.45 Range $36.88 - $42.84

Q4 2013

Shares 13,211 Value ($000) $877 Avg Close $38.01 Range $36.30 - $39.78

Q3 2013

Shares 13,211 Value ($000) $872 Avg Close $38.06 Range $36.09 - $40.02

Q2 2013

Shares 27,258 Value ($000) $1,827 Avg Close $38.29 Range $35.35 - $40.49

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2015	2,691	$201	$46.82	$43.95 - $50.11
Q1 2014	10,620	$789	$39.45	$36.88 - $42.84
Q4 2013	13,211	$877	$38.01	$36.30 - $39.78
Q3 2013	13,211	$872	$38.06	$36.09 - $40.02
Q2 2013	27,258	$1,827	$38.29	$35.35 - $40.49