UNITED STATES	
SECURITIES AND EXCHANGE COMMISSION	
Washington, D.C. 20549	
 	
SCHEDULE 13G/A	
(Amendment No. 1)*	
 	
Under the Securities Exchange Act of 1934	

Hyatt Hotels Corporation	
(Name of Issuer)	
 	
Class A Common Stock, par value $0.01 per share	
(Title of Class of Securities)	
 	
448579102	
(CUSIP Number)	
 	
December 31, 2017	
(Date of Event Which Requires Filing of This Statement)	

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:	
 	
¨	Rule 13d-1(b)	
x	Rule 13d-1(c)	
¨	Rule 13d-1(d)	
 	
(Page 1 of 8 Pages)	
 
______________________________
*The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.
The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

 CUSIP No. 448579102	13G/A	Page  2  of 8 Pages	
 
1	NAME OF REPORTING PERSON
SENATOR INVESTMENT GROUP LP	
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP	(a)  ¨
(b)  ¨	
3	SEC USE ONLY	
4	CITIZENSHIP OR PLACE OF ORGANIZATION
DELAWARE	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH:	5	SOLE VOTING POWER
0	
	6	SHARED VOTING POWER
0	
	7	SOLE DISPOSITIVE POWER
0	
	8	SHARED DISPOSITIVE POWER
0	
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
0	
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	¨	
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
0%	
12	TYPE OF REPORTING PERSON
IA, PN	

 

 CUSIP No. 448579102	13G/A	Page  2  of 8 Pages	

1	NAME OF REPORTING PERSON
ALEXANDER KLABIN	
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP	(a)  ¨
(b)  ¨	
3	SEC USE ONLY	
4	CITIZENSHIP OR PLACE OF ORGANIZATION
UNITED STATES	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH:	5	SOLE VOTING POWER
0	
	6	SHARED VOTING POWER
0	
	7	SOLE DISPOSITIVE POWER
0	
	8	SHARED DISPOSITIVE POWER
0	
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
0	
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	¨	
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
0%	
12	TYPE OF REPORTING PERSON
IN	

 

 CUSIP No. 448579102	13G/A	Page  2  of 8 Pages	

1	NAME OF REPORTING PERSON
DOUGLAS SILVERMAN	
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP	(a)  ¨
(b)  ¨	
3	SEC USE ONLY	
4	CITIZENSHIP OR PLACE OF ORGANIZATION
UNITED STATES	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH:	5	SOLE VOTING POWER
0	
	6	SHARED VOTING POWER
0	
	7	SOLE DISPOSITIVE POWER
0	
	8	SHARED DISPOSITIVE POWER
0	
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
0	
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES	¨	
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
0%	
12	TYPE OF REPORTING PERSON
IN	

 

 CUSIP No. 448579102	13G/A	Page  2  of 8 Pages	

Item 1(a).	NAME OF ISSUER	
 	 	
 	Hyatt Hotel Corporation (the “ Issuer ”)	
 
Item 1(b).	ADDRESS OF ISSUER’S PRINCIPAL EXECUTIVE OFFICES	
 	 	
 	71 South Wacker Drive, 12th Floor
Chicago, IL 60606	
 
Item 2(a).	NAME OF PERSON FILING	
 	 	
 	Senator Investment Group LP (“ Senator Investment Group ”) serves as investment manager to various investment funds (collectively, the “ Funds ”), and as such, has investment discretion with respect to the Funds. Alexander Klabin (“ Mr. Klabin ”) and Douglas Silverman (“ Mr. Silverman ,” and together with Mr. Klabin and Senator Investment Group, the “ Reporting Persons ”) have control of a Delaware limited liability company that may be deemed to control Senator Investment Group.	
 	 	
 	The filing of this statement should not be construed as an admission that any of the Reporting Persons is, for the purposes of Section 13 of the Act, the beneficial owner of the Common Stock (as defined below) reported herein.	
 
Item 2(b).	ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE	
 	 	
 	The principal office of each of the Reporting Persons is:	
 	 	
 	c/o Senator Investment Group LP	
 	510 Madison Avenue	
 	28th Floor	
 	New York, NY 10022	
 
Item 2(c).	CITIZENSHIP	
 	 	
 	Senator Investment Group LP is a Delaware limited partnership. Each of Messrs. Klabin and Silverman is a United States citizen.	
 
Item 2(d).	TITLE OF CLASS OF SECURITIES	
 	 	
 	Class A Common Stock, par value $0.01 per share (the “ Common Stock ”)	
 
Item 2(e).	CUSIP NUMBER	
 	 	
 	 448579102	

 CUSIP No. 448579102	13G/A	Page  2  of 8 Pages	
 
Item 3.	IF THIS STATEMENT IS FILED PURSUANT TO Rules 13d-1(b), OR 13d-2(b) OR (c), CHECK WHETHER THE PERSON FILING IS A:	
 
 	(a)	¨	Broker or dealer registered under Section 15 of the Act;	
 	 	 	 	
 	(b)	¨	Bank as defined in Section 3(a)(6) of the Act;	
 	 	 	 	
 	(c)	¨	Insurance company as defined in Section 3(a)(19) of the Act;	
 	 	 	 	
 	(d)	¨	Investment company registered under Section 8 of the Investment Company Act of 1940;	
 	 	 	 	
 	(e)	¨	An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);	
 	 	 	 	
 	(f)	¨	An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F);	
 	 	 	 	
 	(g)	¨	A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G);	
 	 	 	 	
 	(h)	¨	A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act;	
 	 	 	 	
 	(i)	¨	A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act;	
 	 	 	 	
 	(j)	¨	A non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J);	
 	 	 	 	
 	(k)	¨	Group, in accordance with Rule 13d-1(b)(1)(ii)(K).	
 
 	If filing as a non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J), please
specify the type of institution: __________________________________	
 
Item 4.	OWNERSHIP	
 	 	
 	Senator Investment Group	
 	(a)	Amount of beneficially owned: 0	
 	 	 	
 	(b)	Percent of class: 0%	
 	 	 	
 	(c)	Number of shares as to which such person has:	
 	 	 	
 	 	(i)	Sole power to vote or to direct the vote:  0	
 	 	 	 	
 	 	(ii)	Shared power to vote or to direct the vote:  0	
 	 	 	 	
 	 	(iii)	Sole power to dispose or to direct the disposition of:  0	
 	 	 	 	
 	 	(iv)	Shared power to dispose or to direct the disposition of:  0	
 	 	
 	Mr. Klabin	
 	(a)	Amount of beneficially owned: 0	

 

 CUSIP No. 448579102	13G/A	Page  2  of 8 Pages	

 	(b)	Percent of class: 0%	
 	 	 	
 	(c)	Number of shares as to which such person has:	
 	 	 	
 	 	(i)	Sole power to vote or to direct the vote:  0	
 	 	 	 	
 	 	(ii)	Shared power to vote or to direct the vote: 0	
 	 	 	 	
 	 	(iii)	Sole power to dispose or to direct the disposition of:  0	
 	 	 	 	
 	 	(iv)	Shared power to dispose or to direct the disposition of:  0	
 	 	
 	Mr. Silverman	
 	(a)	Amount of beneficially owned: 0	
 	 	 	
 	(b)	Percent of class: 0%	
 	 	 	
 	(c)	Number of shares as to which such person has:	
 	 	 	
 	 	(i)	Sole power to vote or to direct the vote:  0	
 	 	 	 	
 	 	(ii)	Shared power to vote or to direct the vote:  0	
 	 	 	 	
 	 	(iii)	Sole power to dispose or to direct the disposition of:  0	
 	 	 	 	
 	 	(iv)	Shared power to dispose or to direct the disposition of:  0	
 
Item 5.	OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS	
 	 	
 	If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than 5 percent of the class of securities, check the following: ý	
 
Item 6.	OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON	
 	 	
 	Not applicable.	
 
Item 7.	IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY OR CONTROL PERSON	
 	 	
 	Not applicable.	
 
Item 8.	IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP	
 	 	
 	Not applicable.	
 
Item 9.	NOTICE OF DISSOLUTION OF GROUP	
 	 	
 	Not applicable.	

 

 CUSIP No. 448579102	13G/A	Page  2  of 8 Pages	
 
Item 10.	CERTIFICATION	
 
 	By signing below each of the Reporting Persons certifies that, to the best of his or its knowledge and belief, the securities referred to above were acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having such purpose or effect.	

 

 CUSIP No. 448579102	13G/A	Page  2  of 8 Pages	

SIGNATURES
 
After reasonable inquiry and to the best of our knowledge and belief, the undersigned certify that the information set forth in this statement is true, complete and correct.
DATE: as of February 13, 2018
 
 	SENATOR INVESTMENT GROUP LP	
 	 	
 	/s/ Evan Gartenlaub	
 	Name: Evan Gartenlaub	
 	Title: General Counsel	
 	 	
 	/s/ Evan Gartenlaub as Attorney-in-Fact*	
 	ALEXANDER KLABIN	

 	/s/ Evan Gartenlaub as Attorney-in-Fact*	
 	DOUGLAS SILVERMAN	

* Pursuant to a Power of Attorney attached to the Schedule 13G filed by the Reporting Persons on April 24, 2013.