CMS ENERGY CORP

Ticker: CMS CUSIP: 125896100 Class: COM

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's Holding History (CIK: 0001644956)

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

Q2 2016

Shares 16,702 Value ($000) $766 Avg Close $31.62 Range $29.15 - $34.61

Q1 2016

Shares 19,354 Value ($000) $821 Avg Close $29.26 Range $25.98 - $31.83

Q4 2015

Shares 22,241 Value ($000) $802 Avg Close $26.41 Range $25.15 - $27.50

Q3 2015

Shares 43,787 Value ($000) $1,547 Avg Close $24.79 Range $23.19 - $26.52

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2016	16,702	$766	$31.62	$29.15 - $34.61
Q1 2016	19,354	$821	$29.26	$25.98 - $31.83
Q4 2015	22,241	$802	$26.41	$25.15 - $27.50
Q3 2015	43,787	$1,547	$24.79	$23.19 - $26.52