Cdk Global Inc. (CDK): Sachem Head Capital Decreases Stake

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SCHEDULE 13D

CUSIP No. 12508E101

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1	NAME OF REPORTING PERSON
	Sachem Head GP LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP			(a)	☐
				(b)	☒
3	SEC USE ONLY
4	SOURCE OF FUNDS
	OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)				☐
6	CITIZENSHIP OR PLACE OF ORGANIZATION
	Delaware
Number of shares beneficially owned by each reporting person with		7	SOLE VOTING POWER
			0
		8	SHARED VOTING POWER
			8,750,162
		9	SOLE DISPOSITIVE POWER
			0
		10	SHARED DISPOSITIVE POWER
			8,750,162
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
	8,750,162
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES				☐
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
	5.6%(3)
14	TYPE OF REPORTING PERSON
	OO

(3)	Calculated based on 155,336,347 shares of the Common Stock, $0.01 par value, of CDK Global, Inc., outstanding as of May 2, 2016, as reported in CDK Global, Inc.’s quarterly report on Form 10-Q filed on May 5, 2016.