SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, DC 20549

SCHEDULE 13D
[Rule 13d-101]
INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
TO § 204.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO
§ 240.13d-2(a)
(Amendment No. 21)

Hyatt Hotels Corporation
(Name of Issuer)
Class A Common Stock, $0.01 par value per share
(Title of Class of Securities)
448579102
(CUSIP Number)
Michael A. Pucker, Esq.
Cathy A. Birkeland, Esq.
Latham & Watkins LLP
330 N. Wabash Avenue, Suite 2800
Chicago, Illinois 60611
(312) 876-7700
(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)
September 11, 2017
(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. ☐
(Continued on following pages)
(Page 1 of 18 Pages)

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	  	13D	  	Page 2 of 18 Pages	

  1. 	 	Names of Reporting Persons
I.R.S. Identification Nos. of Above Persons (Entities Only)
 
Maroon Private Trust Company, LLC, solely as trustee of the trust listed on Appendix A-1 .	
  2.	 	Check the Appropriate Box if a Member of a Group
(a)  ☒        (b)  ☐
 	
  3.	 	SEC Use Only
 	
  4.	 	Source of Funds
 
OO	
  5.	 	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)
 
☐	
  6.	 	Citizenship or Place of Organization
 
United States	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
 	  	  7. 	  	Sole Voting Power
 
0	
	  	  8.	  	Shared Voting Power
 
20,723,351*	
	  	  9.	  	Sole Dispositive Power
 
0	
	  	10.	  	Shared Dispositive Power
 
20,723,351*	
11.	 	Aggregate Amount Beneficially Owned by Each Reporting Person
 
20,723,351*	
12.	 	Check if the Aggregate Amount in Row (11) Excludes Certain Shares
 
☒	
13.	 	Percent of Class Represented by Amount in Row (11)
 
17.1%*	
14.	 	Type of Reporting Person
 
OO	

*	Represents shares of the Issuer’s Class A Common Stock, $0.01 par value per share (the “ Class A Common Stock ”), issuable upon conversion of shares of the Issuer’s Class B Common Stock, $0.01 par value per share (the “ Class B Common Stock ” and, together with the Class A Common Stock, the “ Common Stock ”). As provided in the Issuer’s Amended and Restated Certificate of Incorporation, each share of Class B Common Stock is convertible at any time, at the option of the holder, into one share of Class A Common Stock.	
The Reporting Person is party to certain agreements with the Separately Filing Group Members (as defined in the Schedule 13D), which agreements contain, among other things, certain voting agreements and limitations on the sale of their shares of Common Stock. As a result, the Reporting Person may be deemed to be a member of a “group,” within the meaning of Section 13(d)(3) of the Act (as defined in the Schedule 13D), comprised of the Reporting Person and the Separately Filing Group Members. Shares listed as beneficially owned by the Reporting Person exclude shares held by any other Reporting Person or by any of the Separately Filing Group Members, in each case as to which the Reporting Person disclaims beneficial ownership.
All references to the number of shares outstanding are as of September 11, 2017, as reported in the Issuer’s Current Report on Form 8-K, filed September 12, 2017. The percentage is calculated using the total number of shares of Common Stock beneficially owned by the Reporting Person and based on 121,532,388 shares of Common Stock outstanding as of September 11, 2017. With respect to matters upon which the Issuer’s stockholders are entitled to vote, the holders of Class A Common Stock and Class B Common Stock vote together as a single class, and each holder of Class A Common Stock is entitled to one vote per share and each holder of Class B Common Stock is entitled to ten votes per share. The shares of Class B Common Stock owned by the Reporting Person represent 26.3% of the total voting power of the Common Stock as of September 11 2017. The percentage of total voting power of the Common Stock is calculated based on the total voting power of the Common Stock outstanding as of September 11, 2017, which is comprised of 47,409,058 shares of Class A Common Stock and 74,123,330 shares of Class B Common Stock and assumes that no outstanding shares of Class B Common Stock have been converted into shares of Class A Common Stock.

					
CUSIP No. 448579102	  	13D	  	Page 3 of 18 Pages	

  1. 	 	Names of Reporting Persons
I.R.S. Identification Nos. of Above Persons (Entities Only)
 
THHC, L.L.C.	
  2.	 	Check the Appropriate Box if a Member of a Group
(a)  ☒        (b)  ☐
 	
  3.	 	SEC Use Only
 	
  4.	 	Source of Funds
 
OO	
  5.	 	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)
 
☐	
  6.	 	Citizenship or Place of Organization
 
United States	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
 	  	  7. 	  	Sole Voting Power
 
0	
	  	  8.	  	Shared Voting Power
 
20,723,351*	
	  	  9.	  	Sole Dispositive Power
 
0	
	  	10.	  	Shared Dispositive Power
 
20,723,351*	
11.	 	Aggregate Amount Beneficially Owned by Each Reporting Person
 
20,723,351*	
12.	 	Check if the Aggregate Amount in Row (11) Excludes Certain Shares
 
☒	
13.	 	Percent of Class Represented by Amount in Row (11)
 
17.1%*	
14.	 	Type of Reporting Person
 
OO	

*	Represents shares of the Issuer’s Class A Common Stock, $0.01 par value per share (the “ Class A Common Stock ”), issuable upon conversion of shares of the Issuer’s Class B Common Stock, $0.01 par value per share (the “ Class B Common Stock ” and, together with the Class A Common Stock, the “ Common Stock ”). As provided in the Issuer’s Amended and Restated Certificate of Incorporation, each share of Class B Common Stock is convertible at any time, at the option of the holder, into one share of Class A Common Stock.	
The Reporting Person is party to certain agreements with the Separately Filing Group Members (as defined in the Schedule 13D), which agreements contain, among other things, certain voting agreements and limitations on the sale of their shares of Common Stock. As a result, the Reporting Person may be deemed to be a member of a “group,” within the meaning of Section 13(d)(3) of the Act (as defined in the Schedule 13D), comprised of the Reporting Person and the Separately Filing Group Members. Shares listed as beneficially owned by the Reporting Person exclude shares held by any other Reporting Person or by any of the Separately Filing Group Members, in each case as to which the Reporting Person disclaims beneficial ownership.
All references to the number of shares outstanding are as of September 11, 2017, as reported in the Issuer’s Current Report on Form 8-K, filed September 12, 2017. The percentage is calculated using the total number of shares of Common Stock beneficially owned by the Reporting Person and based on 121,532,388 shares of Common Stock outstanding as of September 11, 2017. With respect to matters upon which the Issuer’s stockholders are entitled to vote, the holders of Class A Common Stock and Class B Common Stock vote together as a single class, and each holder of Class A Common Stock is entitled to one vote per share and each holder of Class B Common Stock is entitled to ten votes per share. The shares of Class B Common Stock owned by the Reporting Person represent 26.3% of the total voting power of the Common Stock as of September 11 2017. The percentage of total voting power of the Common Stock is calculated based on the total voting power of the Common Stock outstanding as of September 11, 2017, which is comprised of 47,409,058 shares of Class A Common Stock and 74,123,330 shares of Class B Common Stock and assumes that no outstanding shares of Class B Common Stock have been converted into shares of Class A Common Stock.

					
CUSIP No. 448579102	  	13D	  	Page 4 of 18 Pages	

  1. 	 	Names of Reporting Persons
I.R.S. Identification Nos. of Above Persons (Entities Only)
 
CIBC Trust Company (Bahamas) Limited, not individually, but solely as trustee of the trusts listed on 
Appendix A-2 .	
  2.	 	Check the Appropriate Box if a Member of a Group
(a)  ☒        (b)  ☐
 	
  3.	 	SEC Use Only
 	
  4.	 	Source of Funds
 
OO	
  5.	 	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)
 
☐	
  6.	 	Citizenship or Place of Organization
 
Bahamian International Business Company	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
 	  	  7. 	  	Sole Voting Power
 
0	
	  	  8.	  	Shared Voting Power
 
1,746,453*	
	  	  9.	  	Sole Dispositive Power
 
0	
	  	10.	  	Shared Dispositive Power
 
1,746,453*	
11.	 	Aggregate Amount Beneficially Owned by Each Reporting Person
 
1,746,453*	
12.	 	Check if the Aggregate Amount in Row (11) Excludes Certain Shares
 
☒	
13.	 	Percent of Class Represented by Amount in Row (11)
 
1.4%*	
14.	 	Type of Reporting Person
 
OO	

*	Represents shares of the Issuer’s Class A Common Stock, $0.01 par value per share (the “ Class A Common Stock ”), issuable upon conversion of shares of the Issuer’s Class B Common Stock, $0.01 par value per share (the “ Class B Common Stock ” and, together with the Class A Common Stock, the “ Common Stock ”). As provided in the Issuer’s Amended and Restated Certificate of Incorporation, each share of Class B Common Stock is convertible at any time, at the option of the holder, into one share of Class A Common Stock.	
The Reporting Person is party to certain agreements with the Separately Filing Group Members (as defined in the Schedule 13D), which agreements contain, among other things, certain voting agreements and limitations on the sale of their shares of Common Stock. As a result, the Reporting Person may be deemed to be a member of a “group,” within the meaning of Section 13(d)(3) of the Act (as defined in the Schedule 13D), comprised of the Reporting Person and the Separately Filing Group Members. Shares listed as beneficially owned by the Reporting Person exclude shares held by any other Reporting Person or by any of the Separately Filing Group Members, in each case as to which the Reporting Person disclaims beneficial ownership.
All references to the number of shares outstanding are as of September 11, 2017, as reported in the Issuer’s Current Report on Form 8-K, filed September 12, 2017. The percentage is calculated using the total number of shares of Common Stock beneficially owned by the Reporting Person and based on 121,532,388 shares of Common Stock outstanding as of September 11, 2017. With respect to matters upon which the Issuer’s stockholders are entitled to vote, the holders of Class A Common Stock and Class B Common Stock vote together as a single class, and each holder of Class A Common Stock is entitled to one vote per share and each holder of Class B Common Stock is entitled to ten votes per share. The shares of Class B Common Stock owned by the Reporting Person represent 2.2% of the total voting power of the Common Stock as of September 11 2017. The percentage of total voting power of the Common Stock is calculated based on the total voting power of the Common Stock outstanding as of September 11, 2017, which is comprised of 47,409,058 shares of Class A Common Stock and 74,123,330 shares of Class B Common Stock and assumes that no outstanding shares of Class B Common Stock have been converted into shares of Class A Common Stock.

					
CUSIP No. 448579102	  	13D	  	Page 5 of 18 Pages	

  1. 	 	Names of Reporting Persons
I.R.S. Identification Nos. of Above Persons (Entities Only)
 
Marshall E. Eisenberg and Thomas J. Pritzker, not individually, but solely as co-trustees of the trust listed on Appendix A-3 .	
  2.	 	Check the Appropriate Box if a Member of a Group
(a)  ☒        (b)  ☐
 	
  3.	 	SEC Use Only
 	
  4.	 	Source of Funds
 
OO	
  5.	 	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)
 
☐	
  6.	 	Citizenship or Place of Organization
 
United States	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
 	  	  7. 	  	Sole Voting Power
 
0	
	  	  8.	  	Shared Voting Power
 
50,963*	
	  	  9.	  	Sole Dispositive Power
 
0	
	  	10.	  	Shared Dispositive Power
 
50,963*	
11.	 	Aggregate Amount Beneficially Owned by Each Reporting Person
 
50,963*	
12.	 	Check if the Aggregate Amount in Row (11) Excludes Certain Shares
 
☒	
13.	 	Percent of Class Represented by Amount in Row (11)
 
Less than 0.1%*	
14.	 	Type of Reporting Person
 
OO	

*	Represents shares of the Issuer’s Class A Common Stock, $0.01 par value per share (the “ Class A Common Stock ”), issuable upon conversion of shares of the Issuer’s Class B Common Stock, $0.01 par value per share (the “ Class B Common Stock ” and, together with the Class A Common Stock, the “ Common Stock ”). As provided in the Issuer’s Amended and Restated Certificate of Incorporation, each share of Class B Common Stock is convertible at any time, at the option of the holder, into one share of Class A Common Stock.	
The Reporting Persons are party to certain agreements with the Separately Filing Group Members (as defined in the Schedule 13D), which agreements contain, among other things, certain voting agreements and limitations on the sale of their shares of Common Stock. As a result, the Reporting Persons may be deemed to be members of a “group,” within the meaning of Section 13(d)(3) of the Act (as defined in the Schedule 13D), comprised of the Reporting Persons and the Separately Filing Group Members. Shares listed as beneficially owned by the Reporting Persons exclude shares held by any other Reporting Person or by any of the Separately Filing Group Members, in each case as to which the Reporting Persons disclaim beneficial ownership.
All references to the number of shares outstanding are as of September 11, 2017, as reported in the Issuer’s Current Report on Form 8-K, filed September 12, 2017. The percentage is calculated using the total number of shares of Common Stock beneficially owned by the Reporting Persons and based on 121,532,388 shares of Common Stock outstanding as of September 11, 2017. With respect to matters upon which the Issuer’s stockholders are entitled to vote, the holders of Class A Common Stock and Class B Common Stock vote together as a single class, and each holder of Class A Common Stock is entitled to one vote per share and each holder of Class B Common Stock is entitled to ten votes per share. The shares of Class B Common Stock owned by the Reporting Persons represent less than 0.1% of the total voting power of the Common Stock as of September 11 2017. The percentage of total voting power of the Common Stock is calculated based on the total voting power of the Common Stock outstanding as of September 11, 2017, which is comprised of 47,409,058 shares of Class A Common Stock and 74,123,330 shares of Class B Common Stock and assumes that no outstanding shares of Class B Common Stock have been converted into shares of Class A Common Stock.

					
CUSIP No. 448579102	  	13D	  	Page 6 of 18 Pages	

  1. 	 	Names of Reporting Persons
I.R.S. Identification Nos. of Above Persons (Entities Only)
 
Thomas J. Pritzker, individually and as trustee of Maroon Trust, solely in such trust’s capacity as the member of Maroon Private Trust Company, 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 if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)
 
☐	
  6.	 	Citizenship or Place of Organization
 
United States	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
 	  	  7. 	  	Sole Voting Power
 
0	
	  	  8.	  	Shared Voting Power
 
20,723,351*	
	  	  9.	  	Sole Dispositive Power
 
0	
	  	10.	  	Shared Dispositive Power
 
20,723,351*	
11.	 	Aggregate Amount Beneficially Owned by Each Reporting Person
 
20,723,351*	
12.	 	Check if the Aggregate Amount in Row (11) Excludes Certain Shares
 
☒	
13.	 	Percent of Class Represented by Amount in Row (11)
 
17.1%*	
14.	 	Type of Reporting Person
 
IN; OO	

*	Represents shares of the Issuer’s Class A Common Stock, $0.01 par value per share (the “ Class A Common Stock ”), issuable upon conversion of shares of the Issuer’s Class B Common Stock, $0.01 par value per share (the “ Class B Common Stock ” and, together with the Class A Common Stock, the “ Common Stock ”). As provided in the Issuer’s Amended and Restated Certificate of Incorporation, each share of Class B Common Stock is convertible at any time, at the option of the holder, into one share of Class A Common Stock.	
The Reporting Person is party to certain agreements with the Separately Filing Group Members (as defined in the Schedule 13D), which agreements contain, among other things, certain voting agreements and limitations on the sale of their shares of Common Stock. As a result, the Reporting Person may be deemed to be a member of a “group,” within the meaning of Section 13(d)(3) of the Act (as defined in the Schedule 13D), comprised of the Reporting Person and the Separately Filing Group Members. Shares listed as beneficially owned by the Reporting Person exclude shares held by any other Reporting Person or by any of the Separately Filing Group Members, in each case as to which the Reporting Person disclaims beneficial ownership.
All references to the number of shares outstanding are as of September 11, 2017, as reported in the Issuer’s Current Report on Form 8-K, filed September 12, 2017. The percentage is calculated using the total number of shares of Common Stock beneficially owned by the Reporting Person and based on 121,532,388 shares of Common Stock outstanding as of September 11, 2017. With respect to matters upon which the Issuer’s stockholders are entitled to vote, the holders of Class A Common Stock and Class B Common Stock vote together as a single class, and each holder of Class A Common Stock is entitled to one vote per share and each holder of Class B Common Stock is entitled to ten votes per share. The shares of Class B Common Stock owned by the Reporting Person represent 26.3% of the total voting power of the Common Stock as of September 11 2017. The percentage of total voting power of the Common Stock is calculated based on the total voting power of the Common Stock outstanding as of September 11, 2017, which is comprised of 47,409,058 shares of Class A Common Stock and 74,123,330 shares of Class B Common Stock and assumes that no outstanding shares of Class B Common Stock have been converted into shares of Class A Common Stock.
Thomas J. Pritzker holds 119,707 stock appreciation rights (“ SARs ”) that are currently exercisable at an exercise price of $40.96, 127,410 SARs that are currently exercisable at an exercise price of $41.74, 140,601 SARs that are currently exercisable at an exercise price of $41.29, 207,381 SARs that are currently exercisable at an exercise price of $43.44, 105,141 SARs that are currently exercisable at an exercise price of $49.39, 90,176 SARs that are currently exercisable at an exercise price of $56.27 and 68,775 SARs that are currently exercisable at an exercise price of $47.36. Each SAR gives the holder the right to receive a number of shares of Class A Common Stock equal to the excess of the value of one share of Class A Common Stock at the exercise date, over the exercise price. The number of shares of Class A Common Stock that Mr. Pritzker will receive upon exercise of such SARs is not determinable until the date of exercise and therefore is not included in the information above.

					
CUSIP No. 448579102	  	13D	  	Page 7 of 18 Pages	

  1. 	 	Names of Reporting Persons
I.R.S. Identification Nos. of Above Persons (Entities Only)
 
Jason Pritzker, individually	
  2.	 	Check the Appropriate Box if a Member of a Group
(a)  ☒        (b)  ☐
 	
  3.	 	SEC Use Only
 	
  4.	 	Source of Funds
 
OO	
  5.	 	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)
 
☐	
  6.	 	Citizenship or Place of Organization
 
United States	
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON
WITH
 	  	  7. 	  	Sole Voting Power
 
0	
	  	  8.	  	Shared Voting Power
 
1,410*	
	  	  9.	  	Sole Dispositive Power
 
0	
	  	10.	  	Shared Dispositive Power
 
1,410*	
11.	 	Aggregate Amount Beneficially Owned by Each Reporting Person
 
1,410*	
12.	 	Check if the Aggregate Amount in Row (11) Excludes Certain Shares
 
☒	
13.	 	Percent of Class Represented by Amount in Row (11)
 
Less than 0.1%*	
14.	 	Type of Reporting Person
 
IN	

*	Represents shares of the Issuer’s Class A Common Stock, $0.01 par value per share (the “ Class A Common Stock ”).	
The Reporting Person is party to certain agreements with the Separately Filing Group Members (as defined in the Schedule 13D), which agreements contain, among other things, certain voting agreements and limitations on the sale of their shares of Common Stock. As a result, the Reporting Person may be deemed to be a member of a “group,” within the meaning of Section 13(d)(3) of the Act (as defined in the Schedule 13D), comprised of the Reporting Person and the Separately Filing Group Members. Shares listed as beneficially owned by the Reporting Person exclude shares held by any other Reporting Person or by any of the Separately Filing Group Members, in each case as to which the Reporting Person disclaims beneficial ownership.
All references to the number of shares outstanding are as of September 11, 2017, as reported in the Issuer’s Current Report on Form 8-K, filed September 12, 2017. The percentage is calculated using the total number of shares of Common Stock beneficially owned by the Reporting Person and based on 121,532,388 shares of Common Stock outstanding as of September 11, 2017. With respect to matters upon which the Issuer’s stockholders are entitled to vote, the holders of Class A Common Stock and Class B Common Stock vote together as a single class, and each holder of Class A Common Stock is entitled to one vote per share and each holder of Class B Common Stock is entitled to ten votes per share. The shares of Class A Common Stock owned by the Reporting Person represent less than 0.1% of the total voting power of the Common Stock as of September 11 2017. The percentage of total voting power of the Common Stock is calculated based on the total voting power of the Common Stock outstanding as of September 11, 2017, which is comprised of 47,409,058 shares of Class A Common Stock and 74,123,330 shares of Class B Common Stock and assumes that no outstanding shares of Class B Common Stock have been converted into shares of Class A Common Stock.

					
CUSIP No. 448579102	  	13D	  	Page 8 of 18 Pages	
 
EXPLANATORY NOTE: This Amendment No. 21 to Schedule 13D (“ Amendment No. 21 ”) relates to the Class A Common Stock, $0.01 par value per share, of Hyatt Hotels Corporation, a Delaware corporation (the “ Issuer ”), which has its principal executive office at 150 North Riverside Plaza, Chicago, Illinois 60606. This Amendment No. 21 amends and supplements, as set forth below, the Schedule 13D filed by the Reporting Persons with respect to the Issuer on August 26, 2010 (the “ Original Schedule 13D ”), as amended and supplemented by Amendment No. 1 to Schedule 13D filed by the Reporting Persons on September 8, 2010 (“ Amendment No. 1 ”), Amendment No. 2 to Schedule 13D filed by the Reporting Persons on May 18, 2011 (“ Amendment No. 2 ”), Amendment No. 3 to Schedule 13D filed by the Reporting Persons on November 29, 2011 (“ Amendment No. 3 ”), Amendment No. 4 to Schedule 13D filed by the Reporting Persons on December 19, 2011 (“ Amendment No. 4 ”), Amendment No. 5 to Schedule 13D filed by the Reporting Persons on January 4, 2012 (“ Amendment No. 5 ”), Amendment No. 6 to Schedule 13D filed by the Reporting Persons on August 22, 2012 (“ Amendment No. 6 ”), Amendment No. 7 to Schedule 13D filed by the Reporting Persons on December 4, 2012 (“ Amendment No. 7 ”), Amendment No. 8 to Schedule 13D filed by the Reporting Persons on December 18, 2012 (“ Amendment No. 8 ”), Amendment No. 9 to the Schedule 13D filed by the Reporting Persons on May 17, 2013 (“ Amendment No. 9 ”), Amendment No. 10 to the Schedule 13D filed by the Reporting Persons on June 6, 2013 (“ Amendment No. 10” ), Amendment No. 11 to the Schedule 13D filed by the Reporting Persons on June 21, 2013 (“ Amendment No. 11 ”), Amendment No. 12 to the Schedule 13D filed by the Reporting Persons on September 6, 2013 (“ Amendment No. 12 ”), Amendment No. 13 to the Schedule 13D filed by the Reporting Persons on December 2, 2013 (“ Amendment No. 13 ”), Amendment No. 14 to the Schedule 13D filed by the Reporting Persons on January 3, 2014 (“ Amendment No. 14 ”), Amendment No. 15 to the Schedule 13D filed by the Reporting Persons on April 1, 2014 (“ Amendment No. 15 ”), Amendment No. 16 to the Schedule 13D filed by the Reporting Persons on March 4, 2015 (“ Amendment No. 16 ”), Amendment No. 17 to the Schedule 13D filed by the Reporting Persons on September 2, 2015 (“ Amendment No. 17 ”), Amendment No. 18 to the Schedule 13D filed by the Reporting Persons on August 31, 2016 (“ Amendment No. 18 ”), Amendment No. 19 to the Schedule 13D filed by the Reporting Persons on December 9, 2016 (“ Amendment No. 19 ”) and Amendment No. 20 to the Schedule 13D filed by the Reporting Persons on August 17, 2017 (“ Amendment No. 20 ”). The Original Schedule 13D, as amended and supplemented by Amendment No. 1, Amendment No. 2, Amendment No. 3, Amendment No. 4, Amendment No. 5, Amendment No. 6, Amendment No. 7, Amendment No. 8, Amendment No. 9, Amendment No. 10, Amendment No. 11, Amendment No. 12, Amendment No. 13, Amendment No. 14, Amendment No. 15, Amendment No. 16, Amendment No. 17, Amendment No. 18, Amendment No. 19 and Amendment No. 20, is referred to as the “Schedule 13D.” All capitalized terms not otherwise defined herein have the meanings ascribed to them in the Schedule 13D. The Schedule 13D is amended and supplemented by adding the information contained herein. Only those items amended are reported herein.

					
CUSIP No. 448579102	  	13D	  	Page 9 of 18 Pages	
 
Item 5. Interest in Securities of the Issuer
Item 5 of the Schedule 13D is amended and supplemented as follows:
(a)-(b) As of the date hereof, the Reporting Persons in the aggregate may be deemed to be the beneficial owners of 1,410 shares of currently issued Class A Common Stock and 22,520,767 shares of Class B Common Stock beneficially owned by the Reporting Persons. Based on the number of shares of Class B Common Stock outstanding as of September 11, 2017, as reported in the Issuer’s Current Report on Form 8-K, filed on September 12, 2017, the number of shares of Class B Common Stock beneficially owned by the Reporting Persons represents 30.4% of the total number of shares of Class B Common Stock outstanding. Based on the number of shares of Common Stock outstanding as of September 11, 2017, the number of shares of Common Stock beneficially owned by the Reporting Persons represents 18.5% of the total number of shares of Common Stock outstanding and 28.6% of the total voting power of the shares of Common Stock outstanding, voting together as a single class, assuming that no outstanding shares of Class B Common Stock have been converted into shares of Class A Common Stock.
Thomas J. Pritzker holds 119,707 SARs that are currently exercisable at an exercise price of $40.96, 127,410 SARs that are currently exercisable at an exercise price of $41.74, 140,601 SARs that are currently exercisable at an exercise price of $41.29, 207,381 SARs that are currently exercisable at an exercise price of $43.44, 105,141 SARs that are currently exercisable at an exercise price of $49.39, 90,176 SARs that are currently exercisable at an exercise price of $56.27 and 68,775 SARs that are currently exercisable at an exercise price of $47.36. Each SAR gives the holder the right to receive a number of shares of Class A Common Stock equal to the excess of the value of one share of Class A Common Stock at the exercise date, over the exercise price. The number of shares of Class A Common Stock that Mr. Pritzker will receive upon exercise of such SARs is not determinable until the date of exercise and therefore is not included in the information above.
Schedule A attached to this Amendment No. 21 amends and restates, in its entirety, Schedule A attached to the Schedule 13D. Schedule A attached to this Amendment No. 21 sets forth, as of the date hereof, the number of shares and percentage of the Class A Common Stock outstanding, the number of shares and percentage of the Class B Common Stock outstanding, the percentage of the total number of shares of Common Stock outstanding, and the percentage of the total voting power of the shares of Common Stock outstanding, voting together as a single class, represented by the shares beneficially owned by each Reporting Person.
THHC, L.L.C. is a member-managed Delaware limited liability company and directly holds 20,723,351 shares of Class B Common Stock. Maroon Private Trust Company, LLC is a manager-managed South Dakota limited liability company and the trustee of the trust listed on Appendix A-1 , which is the controlling member of THHC, L.L.C., and in such capacity may be deemed to beneficially own such shares of Class B Common Stock. Maroon Trust is the sole member of Maroon Private Trust Company,

					
CUSIP No. 448579102	  	13D	  	Page 10 of 18 Pages	
 
LLC and in such capacity may be deemed to beneficially own such shares of Class B Common Stock. Thomas J. Pritzker is the trustee of Maroon Trust and in such capacity may, for the purposes hereof, be deemed to beneficially own such shares of Class B Common Stock. The investment decisions of Maroon Private Trust Company, LLC are made by the Trust Committee of its board of managers, consisting of Thomas J. Pritzker, John A. Miller, Glen Miller, Marshall E. Eisenberg and P. Daniel Donohue. The voting decisions of Maroon Private Trust Company, LLC are made by the independent members of the Trust Committee, consisting of John A. Miller, Glen Miller, Marshall E. Eisenberg and P. Daniel Donohue. The members of the Trust Committee disclaim beneficial ownership as a result of serving on the Trust Committee.
Based solely on the information contained in the Issuer’s Current Report on Form 8-K, filed on September 12, 2017, two Separately Filing Group Members entered into purchase and sale agreements with the Issuer on September 6, 2017, pursuant to which the Issuer agreed to repurchase an aggregate of 1,813,459 shares of Class B Common Stock from the Separately Filing Group Members for $59.2875 per share. The transactions closed on September 11, 2017.
Based solely on the information contained in the Schedule 13Ds, as amended, filed by the Separately Filing Group Members, as of the date hereof, the Pritzker Family Group in the aggregate may be deemed to be the beneficial owners of 305,023 shares of currently issued Class A Common Stock and 71,852,935 shares of Class A Common Stock issuable upon conversion of 71,852,935 shares of Class B Common Stock beneficially owned by the Pritzker Family Group. The number of shares of Class A Common Stock beneficially owned by the Pritzker Family Group and currently issued represents 0.6% of the total number of shares of Class A Common Stock outstanding, assuming that no outstanding shares of Class B Common Stock have been converted into shares of Class A Common Stock. The number of shares of Class B Common Stock beneficially owned by the Pritzker Family Group represents 96.9% of the total number of shares of Class B Common Stock outstanding. The number of shares of Common Stock beneficially owned by the Pritzker Family Group represents 59.4% of the total number of shares of Common Stock outstanding and 91.1% of the total voting power of the shares of Common Stock outstanding, voting together as a single class, assuming that no outstanding shares of Class B Common Stock have been converted into shares of Class A Common Stock.
Schedule B attached to this Amendment No. 21 amends and restates, in its entirety, Schedule B attached to the Schedule 13D. Schedule B attached to this Amendment No. 21 sets forth, as of the date hereof, the number of shares and percentage of the Class A Common Stock outstanding, the number of shares and percentage of the Class B Common Stock outstanding, the percentage of the total number of shares of Common Stock outstanding, and the percentage of the total voting power of the shares of Common Stock outstanding, voting together as a single class, represented by the shares beneficially owned by the Reporting Persons and each Separately Filing Group Member. All information with regard to the Separately Filing Group Members is based solely on the information contained in the Schedule 13Ds filed by the Separately Filing Group Members.

SIGNATURES
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
Dated: September 20, 2017

Maroon Private Trust Company, LLC, solely as trustee of the trust listed on Appendix A-1 .
 
    By: /s/ Derek Arend                                                 
         Derek Arend
         Vice President	
	
THHC, L.L.C.
 
    By: /s/ Derek Arend                                                 
         Derek Arend
         President	
	
CIBC Trust Company (Bahamas) Limited, solely as trustee of the trusts listed on Appendix A-2 .
 
    By: /s/ Schevon Miller                                             
         Schevon Miller
         Authorized Signatory*
 
    By: /s/ Helen Carroll                                                 
         Helen Carroll
         Authorized Signatory*	
	
/s/ Marshall E. Eisenberg                                             
Marshall E. Eisenberg, not individually, but solely in the capacity as co-trustee of the trust listed on Appendix A-3 .	

*	A Secretary’s Certificate evidencing the authority of such persons to sign and file this Amendment No. 21 on behalf of CIBC Trust Company (Bahamas) Limited was previously filed as Exhibit 20 to the Schedule 13D and is incorporated by reference herein.	
[Signature Page to Amendment No. 21 to Schedule 13D]

	
/s/ Thomas J. Pritzker                                                 
Thomas J. Pritzker, not individually, but solely in the capacity as trustee of Maroon Trust, solely in such trust’s capacity as the member of Maroon Private Trust Company, LLC, and in the capacity as co-trustee of the trust listed on Appendix A-3	
	
/s/ Thomas J. Pritzker                                                 	
Thomas J. Pritzker, individually	
	
/s/ Jason Pritzker                                                         	
Jason Pritzker, individually                                         	
[Signature Page to Amendment No. 21 to Schedule 13D]

					
CUSIP No. 448579102	  	13D	  	Page 13 of 18 Pages	
 
Appendix A-1

Name of Trust	  	Jurisd.
of Org.	
F.L.P. Trust #11	  	South
Dakota	

					
CUSIP No. 448579102	  	13D	  	Page 14 of 18 Pages	
 
Appendix A-2

Name of Trusts	  	Jurisd. of
Org.	
Trust 2015-THC1	  	Bahamas	
Trust 2015-THC2	  	Bahamas	
Trust J-2015B	  	Bahamas	
Trust B-2015C	  	Bahamas	
Trust D-2015D	  	Bahamas	

					
CUSIP No. 448579102	  	13D	  	Page 15 of 18 Pages	
 
Appendix A-3

Name of Trust	  	Jurisd.
of Org.	
TJP Revocable Trust	  	Illinois	

					
CUSIP No. 448579102	  	13D	  	Page 16 of 18 Pages	
 
Schedule A
Certain Information Regarding the
Reporting Persons 1

 	  	Class A
Common Stock 2	 	  	Class B
Common Stock 3	 	 	% of Total
Common Stock 4	 	 	% of Total
Voting Power 5	 	
Name of Beneficial Owner	  	Shares	 	  	% of
Class A	 	  	Shares	 	  	% of
Class B	 	 	 	 	 	 	 	
Maroon Private Trust Company, LLC, solely in the capacity as trustee of the trust listed on Appendix A-1 . 6	  	 	—  	 	  	 	—  	 	  	 	20,723,351	 	  	 	28.0	% 	 	 	17.1	% 	 	 	26.3	% 	
THHC, L.L.C. 6	  	 	—  	 	  	 	—  	 	  	 	20,723,351	 	  	 	28.0	% 	 	 	17.1	% 	 	 	26.3	% 	
CIBC Trust Company (Bahamas) Limited, solely in the capacity as trustee of the trusts listed on Appendix A-2 .	  	 	—  	 	  	 	—  	 	  	 	1,746,453	 	  	 	2.4	% 	 	 	1.4	% 	 	 	2.2	% 	
Thomas J. Pritzker and Marshall E. Eisenberg, not individually, but solely in the capacity as co-trustees of the trust listed on Appendix A-3 .	  	 	—  	 	  	 	—  	 	  	 	50,963	 	  	 	*	 	 	 	*	 	 	 	*	 	
Thomas J. Pritzker, individually and as trustee of Maroon Trust, solely in such trust’s capacity as the member of Maroon Private Trust Company, LLC 6 7	  	 	—  	 	  	 	—  	 	  	 	20,723,351	 	  	 	28.0	% 	 	 	17.1	% 	 	 	26.3	% 	
Jason Pritzker, individually.	  	 	1,410	 	  	 	*	 	  	 	—  	 	  	 	—  	 	 	 	*	 	 	 	*	 	
*	Less than 1% beneficial ownership	

1  	All references to the number of shares outstanding are as of September 11, 2017, as reported in the Issuer’s Current Report on Form 8-K, filed September 12, 2017.	
2  	The information shown in the table with respect to the percentage of Class A Common Stock beneficially owned is based on 47,409,058 shares of the Class A Common Stock outstanding as of September 11, 2017, assuming that no outstanding shares of Class B Common Stock have been converted into shares of Class A Common Stock.	
3  	The information shown in the table with respect of the percentage of Class B Common Stock beneficially owned is based on 74,123,330 shares of Class B Common Stock outstanding as of September 11, 2017 assuming that no outstanding shares of Class B Common Stock have been converted into shares of Class A Common Stock.	
4  	The information shown in the table with respect to the percentage of total Common Stock beneficially owned is based on 47,409,058 shares of Class A Common Stock and 74,123,330 shares of Class B Common Stock outstanding as of September 11, 2017.	
5  	With respect to matters upon which the Issuer’s stockholders are entitled to vote, the holders of Class A Common Stock and Class B Common Stock vote together as a single class, and each holder of Class A Common Stock is entitled to one vote per share and each holder of Class B Common Stock is entitled to ten votes per share. The percentage of total voting power of the shares of Common Stock is calculated based on the total voting power of the shares of Common Stock outstanding as of September 11, 2017, which is comprised of 47,409,058 shares of Class A Common Stock and 74,123,330 shares of Class B Common Stock and assumes that no outstanding shares of Class B Common Stock have been converted into shares of Class A Common Stock.	
6  	THHC, L.L.C. is a member-managed Delaware limited liability company and directly holds 20,723,351 shares of Class B Common Stock. Maroon Private Trust Company, LLC is a manager-managed South Dakota limited liability company and the trustee of the trust listed on Appendix A-1, which is the controlling member of THHC, L.L.C., and in such capacity may be deemed to beneficially own such shares of Class B Common Stock. Maroon Trust is the sole member of Maroon Private Trust Company, LLC and in such capacity may be deemed to beneficially own such shares of Class B Common Stock. Thomas J. Pritzker is the trustee of Maroon Trust and in such capacity may, for the purposes hereof, be deemed to beneficially own such shares of Class B Common Stock. The investment decisions of Maroon Private Trust Company, LLC are made by the Trust Committee of its board of managers, consisting of Thomas J. Pritzker, John A. Miller, Glen Miller, Marshall E. Eisenberg and P. Daniel Donohue. The voting decisions of Maroon Private Trust Company, LLC are made by the independent members of the Trust Committee, consisting of John A. Miller, Glen Miller, Marshall E. Eisenberg and P. Daniel Donohue. The members of the Trust Committee disclaim beneficial ownership as a result of serving on the Trust Committee.	
7  	Thomas J. Pritzker holds 119,707 stock appreciation rights (“ SARs ”) that are currently exercisable at an exercise price of $40.96, 127,410 SARs that are currently exercisable at an exercise price of $41.74, 140,601 SARs that are currently exercisable at an exercise price of $41.29, 207,381 SARs that are currently exercisable at an exercise price of $43.44, 105,141 SARs that are currently exercisable at an exercise price of $49.39, 90,176 SARs that are currently exercisable at an exercise price of $56.27 and 68,775 SARs that are currently exercisable at an exercise price of $47.36. Each SAR gives the holder the right to receive a number of shares of Class A Common Stock equal to the excess of the value of one share of Class A Common Stock at the exercise date, over the exercise price. The number of shares of Class A Common Stock that Mr. Pritzker will receive upon exercise of such SARs is not determinable until the date of exercise and therefore is not included in the information above. Thomas J. Pritzker is also the grantor of the trust set forth on Appendix A-3 , and has the right to revoke the trust at any time without the consent of another person. As a result he could be deemed to be the sole beneficial owner of the shares owned by such trust.	

					
CUSIP No. 448579102	  	13D	  	Page 17 of 18 Pages	
 
Schedule B
Certain Information Regarding the
Separately Filing Group Members 1

 	  	Class A
Common Stock 2	 	 	Class B
Common Stock 3	 	 	% of Total
Common Stock 4	 	 	% of Total
Voting Power 5	 	
Separately Filing Group Member	  	Shares	 	  	% of
Class A	 	 	Shares	 	  	% of
Class B	 	 	 	 	 	 	 	
CIBC Trust Company (Bahamas) Limited in its capacity as trustee and Other Reporting Persons 6	  	 	—  	 	  	 	—  	 	 	 	781,807	 	  	 	1.1	% 	 	 	0.6	% 	 	 	1.0	% 	
Trustees of the Thomas J. Pritzker Family Trusts and Other Reporting Persons 7	  	 	1,410	 	  	 	*	 	 	 	22,520,767	 	  	 	30.4	% 	 	 	18.5	% 	 	 	28.6	% 	
Trustees of the Nicholas J. Pritzker Family Trusts and Other Reporting Persons 8	  	 	—  	 	  	 	—  	 	 	 	745,978	 	  	 	1.0	% 	 	 	0.6	% 	 	 	0.9	% 	
Trustees of the Jennifer N. Pritzker Family Trusts and Other Reporting Persons 9	  	 	8,470	 	  	 	*	 	 	 	2,420,151	 	  	 	3.3	% 	 	 	2.0	% 	 	 	3.1	% 	
Trustees of the Linda Pritzker Family Trusts 10	  	 	—  	 	  	 	—  	 	 	 	—  	 	  	 	—  	 	 	 	—  	 	 	 	—  	 	
Trustees of the Karen L. Pritzker Family Trusts 11	  	 	—  	 	  	 	—  	 	 	 	8,584,104	 	  	 	11.6	% 	 	 	7.1	% 	 	 	10.9	% 	
Trustee of the Penny Pritzker Family Trusts and Other Reporting Persons 12	  	 	14,650	 	  	 	*	 	 	 	7,815,797	 	  	 	10.5	% 	 	 	6.4	% 	 	 	9.9	% 	
Trustees of the Daniel F. Pritzker Family Trusts and Other Reporting Persons 13	  	 	280,493	 	  	 	0.6	% 	 	 	6,486,507	 	  	 	8.8	% 	 	 	5.6	% 	 	 	8.3	% 	
The Anthony N. Pritzker Family Foundation 14	  	 	—  	 	  	 	—  	 	 	 	1,830,094	 	  	 	2.5	% 	 	 	1.5	% 	 	 	2.3	% 	
Trustees of the Gigi Pritzker Pucker Family Trusts and Other Reporting Persons 15	  	 	—  	 	  	 	—  	 	 	 	18,837,636	 	  	 	25.4	% 	 	 	15.5	% 	 	 	23.9	% 	
The Pritzker Family Foundation 16	  	 	—  	 	  	 	—  	 	 	 	1,830,094	 	  	 	2.5	% 	 	 	1.5	% 	 	 	2.3	% 	
Pritzker Family Group Totals	  	 	305,023	 	  	 	0.6	% 	 	 	71,852,935	 	  	 	96.9	% 	 	 	59.4	% 	 	 	91.1	% 	
*	Less than 1% beneficial ownership	

1  	All references to the number of shares outstanding are as of September 11, 2017, as reported in the Issuer’s Current Report on Form 8-K, filed September 12, 2017.	
2  	The information shown in the table with respect to the percentage of Class A Common Stock beneficially owned is based on 47,409,058 shares of Class A Common Stock outstanding as of September 11, 2017, assuming that no outstanding shares of Class B Common Stock have been converted into shares of Class A Common Stock.	
3  	The information shown in the table with respect of the percentage of Class B Common Stock beneficially owned is based on 74,123,330 shares of Class B Common Stock outstanding as of September 11, 2017, assuming that no outstanding shares of Class B Common Stock have been converted into shares of Class A Common Stock.	
4  	The information shown in the table with respect to the percentage of total Common Stock beneficially owned is based on 47,409,058 shares of Class A Common Stock and 74,123,330 shares of Class B Common Stock outstanding as of September 11, 2017.	
5  	With respect to matters upon which the Issuer’s stockholders are entitled to vote, the holders of Class A Common Stock and Class B Common Stock vote together as a single class, and each holder of Class A Common Stock is entitled to one vote per share and each holder of Class B Common Stock is entitled to ten votes per share. The percentage of total voting power of the shares of Common Stock is calculated based on the total voting power of the shares of Common Stock outstanding as of September 11, 2017, which is comprised of 47,409,058 shares of Class A Common Stock and 74,123,330 shares of Class B Common Stock and assumes that no outstanding shares of Class B Common Stock have been converted into shares of Class A Common Stock.	
6  	See the Schedule 13D filed on August 26, 2010, as amended, by the CIBC Trust Company (Bahamas) Limited, solely as trustee of the Non-U.S. Situs Trusts listed on Appendix A to the Schedule 13D, which includes information regarding the filer’s jurisdiction of organization, principal business, and address of principal office.	

					
CUSIP No. 448579102	  	13D	  	Page 18 of 18 Pages	
 
7  	See the Schedule 13D filed on August 26, 2010, as amended, by Marshall E. Eisenberg, not individually, but solely as trustee of certain trusts listed on Appendix A-1 to the Schedule 13D, and the other Reporting Persons named therein, which includes information regarding the filer’s jurisdiction of organization, principal business, and address of principal office. Thomas J. Pritzker holds 119,707 stock appreciation rights (“ SARs ”) that are currently exercisable at an exercise price of $40.96, 127,410 SARs that are currently exercisable at an exercise price of $41.74, 140,601 SARs that are currently exercisable at an exercise price of $41.29, 207,381 SARs that are currently exercisable at an exercise price of $43.44, 105,141 SARs that are currently exercisable at an exercise price of $49.39, 90,176 SARs that are currently exercisable at an exercise price of $56.27 and 68,775 SARs that are currently exercisable at an exercise price of $47.36. The number of shares of Class A Common Stock that Mr. Pritzker will receive upon exercise of such SARs is not currently determinable and therefore not included in the table above because each SAR gives the holder the right to receive a number of shares of Class A Common Stock equal to the excess of the value of one share of A Common Stock at the exercise date, which is not determinable until the date of exercise, over the exercise price.	
8  	See the Schedule 13D filed on August 26, 2010, as amended, by Marshall E. Eisenberg, not individually, but solely as trustee of certain trusts listed on Appendix A-1 to the Schedule 13D, and the other Reporting Persons named therein, which includes information regarding the filer’s jurisdiction of organization, principal business, and address of principal office.	
9  	See the Schedule 13D filed on August 26, 2010, as amended, by Charles E. Dobrusin and Harry B. Rosenberg, not individually, but solely as co-trustees of certain trusts listed on Appendix A-1 to the Schedule 13D, and the other Reporting Persons named therein, which includes information regarding the filer’s jurisdiction of organization, principal business, and address of principal office.	
10  	See the Schedule 13D filed on August 26, 2010, as amended, by Lewis M. Linn, not individually, but solely as trustee for the trusts listed on Appendix A-1 to the Schedule 13D, and the other Reporting Persons named therein, which includes information regarding the filer’s jurisdiction of organization, principal business, and address of principal office.	
11  	See the Schedule 13D filed on August 26, 2010, as amended, by Walter W. Simmers, Andrew D. Wingate and Lucinda Falk, not individually, but solely as co-trustees for the trusts listed on Appendix A-1 to the Schedule 13D, and the other Reporting Persons named therein, which includes information regarding the filer’s jurisdiction of organization, principal business, and address of principal office.	
12  	See the Schedule 13D filed on August 26, 2010, as amended, by John Kevin Poorman, not individually, but solely as trustee of certain trusts listed on Appendix A-1 to the Schedule 13D, and the other Reporting Persons named therein, which includes information regarding the filer’s jurisdiction of organization, principal business, and address of principal office.	
13  	See the Schedule 13D filed on August 26, 2010, as amended, by Lewis M. Linn, not individually, but solely as trustee for the trusts listed on Appendix A-1 to the Schedule 13D, and the other Reporting Persons named therein, which includes information regarding the filer’s jurisdiction of organization, principal business, and address of principal office.	
14  	See the Schedule 13D filed on August 26, 2010, as amended, by Lewis M. Linn, not individually, but solely as trustee for the trusts listed on Appendix A-1 to the Schedule 13D, and the other Reporting Persons named therein, which includes information regarding the filer’s jurisdiction of organization, principal business, and address of principal office.	
15  	See the Schedule 13D filed on August 26, 2010, as amended, by Gigi Pritzker Pucker and Edward W. Rabin, not individually, but solely as trustees of certain trusts listed on Appendix A-1 to the Schedule 13D, and the other Reporting Persons named therein on, which includes information regarding the filer’s jurisdiction of organization, principal business, and address of principal office.	
16  	See the Schedule 13D filed on August 26, 2010, as amended, by Thomas J. Muenster, not individually, but solely as trustee for the trusts listed on Appendix A-1 to the Schedule 13D, and the other Reporting Persons named therein, which includes information regarding the filer’s jurisdiction of organization, principal business, and address of principal office.