In Millions, Except Per Share Amounts

1998 (Unaudited)

1997 (Unaudited)

Quarters Ended

March 31

June 30

Sept. 30

Dec. 31

March 31

June 30

Sept. 30

Dec. 31

Operating revenue^(a)

$1,374

$1,132

$1,286

$1,349

$1,295

$1,022

$1,030

$1,434

Pretax operating income^(a)

$197

$188

$222

$168

$204

$158

$178

$176

Consolidated net income^(a)

$88

$65

$81

$51

$78

$47

$60

$59

Basic earnings (loss) per average common share:^(b)

CMS Energy^(a)

$.79

$.63

$.81

$.44

$.73

$.48

$.64

$.54

Class G

$1.09

$.12

$(.16)

$.52

$1.18

$.16

$(.21)

$.70

Diluted earnings (loss) per average common share:^(b)

CMS Energy^(a)

$.77

$.62

$.80

$.44

$.72

$.48

$.63

$.54

Class G

$1.09

$.12

$(.16)

$.52

$1.18

$.16

$(.21)

$.70

Dividends declared per common share:

CMS Energy

$.30

$.30

$.33

$.33

$.27

$.27

$.30

$.30

Class G

$.31

$.31

$.325

$.325

$.295

$.295

$.31

$.31

Common stock prices^(c)

CMS Energy:

High

$47 5/16

$47 3/16

$44 3/4

$50 1/8

$34 1/2

$35 5/8

$38 1/16

$44 1/16

Low

$41 7/8

$40 11/16

$38 3/4

$43 3/16

$31 1/2

$31 1/8

$34 7/8

$35 11/16

Class G:

High

$26 5/8

$26 7/8

$25 1/4

$26 1/2

$19 7/8

$19 7/8

$22

$27 1/8

Low

$22 1/4

$23 1/4

$21 3/8

$23 1/8

$17 7/8

$17 5/8

$19

$20 5/8