Document:

Amendment to the Securities Purchase and Investment Agreement

 Exhibit 10.10 
 Execution copy 
 AMENDMENT TO THE SECURITIES PURCHASE AND INVESTMENT

 AGREEMENT AND THE REGISTRATION RIGHTS AGREEMENT 
 This AMENDMENT AGREEMENT TO THE SECURITIES PURCHASE AND INVESTMENT AGREEMENT AND REGISTRATION RIGHTS AGREEMENT (this “Agreement”) dated as of February 16, 2012, is made among
Och-Ziff Capital Management Group LLC, a Delaware limited liability company (“Och-Ziff”), Dubai Holding Investments Group Limited (“DHIG”), a limited liability company formed under the laws of the Emirate of Dubai
and owned and controlled by Dubai Holding LLC, Dubai International Capital LLC (“DIC”), a limited liability company formed under the laws of the Emirate of Dubai and a wholly-owned subsidiary of DHIG, DIC Sahir Limited, a
corporation organized under the laws of the Cayman Islands and a wholly-owned subsidiary of DIC (“DIC Sahir”), DIC Hungary Korlátolt Felelősségű Tárasaság, a limited liability company
incorporated under Hungarian law and a wholly-owned subsidiary of DIC Sahir (“DIC Hungary”), and DIC Poland z.o.o., a limited liability company incorporated under Polish law and a wholly-owned subsidiary of DIC Sahir (“DIC
Poland”). 
 W I T N E S S E T H 
 WHEREAS, on June 24, 2009, DIC Hungary acquired from DIC Sahir 38,138,571 Class A shares (the “Shares”) representing Class A limited liability company interests of
Och-Ziff. 
 WHEREAS, pursuant to a letter from DIC Sahir and DIC Hungary dated June 24, 2009, in accordance with Section 10.4 of the
Securities Purchase and Investment Agreement, dated as of October 29, 2007 (the “Purchase and Investment Agreement”), by and among Och-Ziff, DIC Sahir and DIC, and Section 3.8 of the Registration Rights Agreement, dated as
of November 19, 2007 (the “RRA”), between Och-Ziff and DIC Sahir, DIC Hungary, as Permitted Transferee under the Purchase and Investment Agreement and the RRA, agreed to be bound by the terms and conditions of the Purchase and
Investment Agreement and the RRA. 
 WHEREAS, it is intended that, as part of the restructuring of DIC and DHIG, DIC will transfer its shares in
DIC Sahir (the “DIC Sahir Shares”) into ownership of DHIG LP, a Cayman Islands exempted limited partnership of which DHIG is the limited partner and DHIG GP, a wholly owned subsidiary of DHIG,, is the general partner) (the
“DHIG Transfer”). 
 WHEREAS, it is intended that, pursuant to a solvent corporate reorganisation that may occur before or
after the DHIG Transfer, DIC Hungary will transfer the Shares to DIC Sahir, which will then immediately transfer the Shares to DIC Poland (collectively, the “DIC Poland Transfer”). 

WHEREAS, the parties desire to confirm the permissibility of the DHIG Transfer and the DIC Poland Transfer under the Purchase and Investment Agreement
and the RRA and to clarify the application of such agreements to the parties following the DHIG Transfer and the DIC Poland Transfer. 

  
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 NOW, THEREFORE, in consideration of the covenants contained in this Agreement and for other good and
valuable consideration, the receipt and adequacy of which are hereby acknowledged, Och-Ziff, DHIG, DIC, DIC Sahir, DIC Hungary and DIC Poland agree as follows: 
  

	1.	DEFINITIONS AND INTERPRETATION 

 Section 1.1 Definitions. Capitalized terms used in this Agreement and not otherwise defined are used in this Agreement as such terms are defined in the Purchase and Investment Agreement and
the RRA, as the case may be. 
 Section 1.2 Miscellaneous. The words “hereof”,
“herein”, “herewith” and words of similar import shall, unless otherwise stated, be construed to refer to this Agreement as a whole and not to any particular provision of this Agreement, and section references are
to the sections of this Agreement unless otherwise specified. All terms defined in this Agreement shall have the defined meanings contained herein when used in any document made or delivered pursuant hereto unless otherwise defined therein. The
definitions contained in this Agreement are applicable to the singular as well as the plural forms of such terms. Any agreement, instrument, or statute defined or referred to herein or in any agreement that is referred to herein means such
agreement, instrument, or statute as from time to time, amended, qualified or supplemented, including (in the case of agreements and instruments) by waiver or consent and (in the case of statutes) by succession of comparable successor statutes and
all attachments thereto and instruments incorporated therein. 
 Section 1.3 Joint Preparation. The Parties have
participated jointly in the negotiation and drafting of this Agreement. In the event an ambiguity or question of intent or interpretation arises, this Agreement shall be construed as if drafted jointly by the parties and no presumption or burden of
proof shall arise favoring or disfavoring any party by virtue of the authorship of any provisions of this Agreement. 
 2. AMENDMENTS TO
PURCHASE AND INVESTMENT AGREEMENT AND RRA 
 Section 2.1 Amendments to Purchase and Investment Agreement.
Pursuant to Section 10.3 of the Purchase and Investment Agreement: 
 (a) the definition of “Guarantor Controlled
Affiliate” contained in Annex 1 of the Purchase and Investment Agreement is hereby amended and restated as follows: 

““Guarantor Controlled Affiliate” means any person that directly, or indirectly through one or more
intermediaries, is controlled by the Guarantor, Dubai Holding LLC or Dubai Holding Investments Group LLC and “control” for these purposes means the direct or indirect power to direct or cause the direction of the management and
policies of another person, whether by operation of law or regulation, through ownership of securities, as trustee or executor or in any other manner.” 

  
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 Section 2.2 Amendments to RRA. Pursuant to Section 3.2 of the RRA:

 (a) the definition of “Guarantor Controlled Affiliate” contained in Section 1.1 of the RRA is hereby amended
and restated as follows: 
 ““Guarantor Controlled Affiliate” means any person that directly, or
indirectly through one or more intermediaries, is controlled by the Guarantor, Dubai Holding LLC or Dubai Holding Investments Group LLC, and “control” for these purposes means the direct or indirect power to direct or cause the
direction of the management and policies of another person, whether by operation of law or regulation, through ownership of securities, as trustee or executor or in any other manner.” 

Section 2.3 Permitted Transferees. For the avoidance of doubt, the parties intend for the foregoing amendments to result in
DHIG, DHIG GP, DHIG LP, DIC Sahir and DIC Poland being deemed Permitted Transferees under the Purchase and Investment Agreement and the RRA in connection with the DHIG Transfer and the DIC Poland Transfer. 

It is also intended that the shares of DHIG GP, DIC Sahir and DIC Poland together with the partnership interest of DHIG LP will be pledged as security
for the loan which was advanced to DHIG by a syndicate of lenders in connection with the original acquisition of the Purchased Class A Shares. 
  

	3.	REPRESENTATIONS AND WARRANTIES OF DIC SAHIR, DIC HUNGARY, DIC POLAND AND DHIG 

Section 3 Representations and Warranties of DIC Sahir, DIC Hungary and DIC Poland. DIC Sahir, DIC Hungary and DIC Poland,
severally and jointly, each hereby represent, warrant and covenant to Och-Ziff that: (i) DIC Poland is a wholly-owned subsidiary of DIC Sahir under the control of DIC Sahir, and will remain a wholly-owned subsidiary of DIC Sahir immediately
following completion of (a) the DHIG Transfer and (b) the DIC Poland Transfer; (ii) DIC Sahir, DIC Hungary and DIC Poland have full power and authority to execute this Agreement and consummate the DIC Poland Transfer; and
(iii) the DIC Poland Transfer and the execution, delivery and performance of this Agreement have been duly and validly authorized by all necessary action on the part of DIC Sahir, DIC Hungary and DIC Poland and, upon consummation of the DIC
Poland Transfer, DIC Poland will be the lawful holder of the Shares. 
 Section 3.2 Representations and Warranties of
DHIG. DHIG represents, warrants and covenants to Och-Ziff, that: (i) Dubai Holding LLC is the direct holding company of DHIG, (ii) DHIG will be the indirect holding company of DIC Sahir immediately following completion of (a) the
DHIG Transfer and (b) the DIC Poland Transfer and (iii) the DHIG Transfer and the execution, delivery and performance of this Agreement have been duly and validly authorized by all necessary action on the part of DHIG and, upon
consummation of the DHIG Transfer, DHIG LP will be the lawful holder of the shares in DIC Sahir and as a result, the indirect holder of the Shares. 

  
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	4.	COVENANT OF DIC POLAND AND DHIG 

 Section 4.1 Covenant of DIC Poland. In accordance with Section 10.4 of the Purchase and Investment Agreement and Section 3.8 of the RRA, DIC Poland hereby agrees, upon completion of
the DIC Poland Transfer, to be bound by the terms and conditions of the Purchase and Investment Agreement and the RRA to the same extent as DIC Sahir, and accordingly shall obtain all the rights of DIC Sahir under the Purchase and Investment
Agreement and the RRA (provided, however, that DIC Poland shall not obtain the rights or assume the obligations of DIC Sahir under Section 8.4 of the Purchase and Investment Agreement). 

Section 4.2 Covenant of DHIG. In accordance with Section 10.4 of the Purchase and Investment Agreement and
Section 3.8 of the RRA, DHIG hereby agrees upon completion of the DHIG Transfer to be bound by (and to cause DHIG GP and DHIG LP to comply with) the terms and conditions of the Purchase and Investment Agreement and the RRA to the same extent as
DIC Sahir, and accordingly shall obtain all the rights of DIC Sahir under the Purchase and Investment Agreement and the RRA (provided, however, that DHIG shall not obtain the rights or assume the obligations of DIC Sahir under Section 8.4 of
the Purchase and Investment Agreement). 
  

	5.	MISCELLANEOUS 

Section 5.1 Governing Law; Jurisdiction. This Agreement and the rights and obligations of the parties hereunder shall be
governed by, and construed and interpreted in accordance with, the laws of the State of New York without reference to any choice of law provision thereof that would mandate the application of the laws of another jurisdiction, and shall inure to the
benefit of, and be binding upon and inure to the benefit of the parties hereto and their respective successors. Each party to this Agreement hereby irrevocably and unconditionally, with respect to any matter or dispute arising under, or in
connection with, this Agreement and the transactions contemplated hereby (i) submits for itself and its property in any legal action or proceeding relating to this Agreement, or for recognition and enforcement of any judgment in respect
thereof, to the exclusive general jurisdiction of the courts of the State of New York, the courts of the United States of America for the Southern District of New York, and any appellate courts thereof (the “New York Courts”) (and
covenants not to commence any legal action or proceeding in any other venue or jurisdiction); (ii) consents that any such action or proceeding may be brought in such courts and waives any objection that it may now or hereafter have to the venue
of any such action or proceeding in any such court or that such action or proceeding was brought in an inconvenient court and agrees not to plead or claim the same; (iii) agrees that service of process in any such action will be in accordance
with the laws of the State of New York but that nothing herein shall affect the right to effect service of process in any other manner permitted by law; (iv) waives any and all immunity from suit, execution, attachment or other legal process;
and (v) waives in connection with any such action any all rights to a jury trial. The parties agree that any judgment of any New York Court may be enforced in any court having jurisdiction over any party over any of their assets. 

  
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 Section 5.2 Waiver of Sovereign Immunity. With respect to the contractual
liability of each of DHIG, DIC, DIC Sahir, DIC Hungary and DIC Poland to perform its respective obligations under this Agreement, with respect to itself or its property, each of DHIG, DIC, DIC Sahir, DIC Hungary and DIC Poland: 

(a) agrees that the execution, delivery and performance by it of this Agreement constitute private and commercial acts done for private
and commercial purposes; 
 (b) agrees that, should any proceedings be brought against it or its assets in any jurisdiction in
relation to this Agreement or any transaction contemplated by this Agreement, each of DHIG GP, DHIG LP, DHIG, DIC, DIC Sahir, DIC Hungary and DIC Poland is not entitled to any immunity on the basis of sovereignty or otherwise in respect of its
obligations under this Agreement, and no immunity from such proceedings (including, without limitation, immunity from service of process from suit, from the jurisdiction of any court, from an order or injunction of such court or the enforcement of
same against its assets) shall be claimed by or on behalf of such party or with respect to its assets; 
 (c) waives, in any
such proceedings, to the fullest extent permitted by law, any right of immunity which it or any of its assets now has or may acquire in the future in any jurisdiction; 
 (d) consents generally in respect of the enforcement of any judgment or award against it in any such proceedings to the giving of any relief or the issue of any process in any jurisdiction in connection
with such proceedings (including, without limitation, pre-judgment attachment, post judgment attachment, the making, enforcement or execution against or in respect of any assets whatsoever irrespective of their use or intended use of any order or
judgment that may be made or given in connection therewith); and 
 (e) specifies that, for the purposes of this provision,
assets shall be taken as excluding “premises of the mission” as defined in the Vienna Convention on Diplomatic Relations signed at Vienna, April 18, 1961, “consular premises” as defined in the Vienna Convention on Consular
Relations signed in 1963, and military property or military assets or property of DIC, DIC Sahir, DIC Hungary and DIC Poland. 

Section 3.3 Headings. The headings in this Agreement are for convenience of reference only and shall not limit or otherwise
affect the meaning hereof. 
 Section 3.4 Counterparts. This Agreement may be signed in counterparts, each of which
shall constitute an original and which together shall constitute one and the same agreement. 
 [Signatures appear on
following page] 

  
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 IN WITNESS WHEREOF, the parties hereto have duly executed or caused to be duly executed this
Agreement as of the date first written above. 
  

			
	OCH-ZIFF CAPITAL MANAGEMENT GROUP LLC
		
	By:	 	 /s/ Joel M. Frank

		 	Name: Joel M. Frank
		 	Title: Chief Financial Officer

 [Signature page to Amendment Agreement to Securities Purchase and Investment Agreement

 and Registration Rights Agreement] 

  
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	DUBAI INTERNATIONAL CAPITAL LLC
		
	By:	 	 /s/ Ahmad Bin Byat

		 	Name:	 	Ahmad Bin Byat
		 	Title:	 	Executive Managing Director
	
	DUBAI HOLDING INVESTMENTS GROUP LLC
		
	By:	 	 /s/ Ahmad Bin Byat

		 	Name:	 	Ahmad Bin Byat
		 	Title:	 	General Manager
	
	DIC SAHIR LIMITED
		
	By:	 	 /s/ Jamie Nelson

		 	Name:	 	Jamie Nelson
		 	Title:	 	Director
		
	By:	 	 /s/ David Smoot

		 	Name:	 	David Smoot
		 	Title:	 	Director

 [Signature page to Amendment Agreement to Securities Purchase and Investment Agreement

 and Registration Rights Agreement] 

  
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	DIC HUNGARY KORLÁTOLT FELELŐSSÉGŰ TÁRASASÁG
		
	By:	 	 /s/ Jamie Nelson

		 	Name:	 	Jamie Nelson
		 	Title:	 	Managing Director
		
	By:	 	 /s/ Júlia Varga

		 	Name:	 	Júlia Varga
		 	Title:	 	Managing Director
	
	DIC POLAND S.P. Z.O.O.
		
	By:	 	 /s/ Jamie Nelson

		 	Name:	 	Jamie Nelson
		 	Title:	 	Member of the Management Board

 [Signature page to Amendment Agreement to Securities Purchase and Investment Agreement

 and Registration Rights Agreement] 

  
 - 8 -<![CDATA[Amended & Restated Deferred Equity Participation Plan]]>

 Exhibit 10.16 
 ARTHUR J. GALLAGHER & CO. 
 DEFERRED EQUITY PARTICIPATION PLAN

 (as amended and restated on March 14, 2012) 

Purpose 

The purpose of this Deferred Equity Participation Plan (the “Plan”) is to encourage key executives of Arthur J.
Gallagher & Co. (together with its subsidiaries and affiliates, the “Company”), to remain employed with the Company until at least age 62. The retention of key executives promotes the interests of the Company and its stockholders
by providing continuity of management and leadership and by capitalizing on the investments the Company has made in its key executives over the years. In the event that shares of the Company’s common stock, par value $1.00 per share
(“Common Stock”) are contributed to the Plan, such shares of Common Stock will be deemed to have been distributed under the Arthur J. Gallagher & Co. 2011 Long-Term Incentive Plan, as amended from time to time, or any successor
plan adopted by the Company and approved by its stockholders (the “LTIP”), and will count against the limit on the number of shares of Common Stock available for distribution thereunder. 

Section 1. Trust and Trust Funding. 
 (a) Trust. The Company has formed The Arthur J. Gallagher & Co. Deferred Equity Trust (the “Trust”) pursuant to the trust agreement dated March 22, 2001, as amended. The
Trust is intended to be a “grantor trust” under the Code and the establishment of the Trust or the utilization of the Trust for Plan benefits, as applicable, is not intended to cause any Participant to realize current income on amounts
contributed thereto, and the Trust shall be so interpreted. Any such funds will be subject to the claims of all bankruptcy or insolvency creditors of the Company as provided in the Trust agreement. No Participant will have any vested interest or
secured or preferred position with respect to such funds or have any claims against the Company hereunder except as a general creditor. 
 (b) Trust Funding. On or before June 15 each year, to the extent permissible under Section 409A of the Internal Revenue Code of 1986, as amended, and all regulations, interpretations and
administrative guidance issued thereunder (the “Code”), the Company may contribute to the Trust either: (i) shares of Common Stock, or (ii) cash, in either case in an amount approved by the Compensation Committee (the
“Committee”) of the Company’s Board of Directors (such contribution, the “Annual Funding”). The Committee shall exercise all rights of ownership, including voting control, of the Trust assets prior to distribution under the
Plan. 
 (c) Interrelationship of the Plan and the Trust. The provisions of the Plan shall govern the rights of a
Participant to receive distributions pursuant to the Plan. The provisions of the Trust shall govern the rights of the Company, the Participants and the creditors of the Company to the assets transferred to the Trust. 

Section 2. Participant Accounts. 
 (a) Accounts. The Company shall maintain an unfunded, bookkeeping account (an “Account”) for the benefit of each executive who participates in the Plan (a
“Participant”). 

 (b) Annual Funding. On or before June 15 of each year, the Chief Executive
Officer of the Company shall provide to the Committee a list of Participants and the proposed allocation (either in dollars or on a percentage basis) of the Annual Funding from that year that may be credited to each such Participant’s Account
(with the exception of the Chief Executive Officer’s allocation). The Committee shall determine the allocation of the Annual Funding to be awarded to the Chief Executive Officer and shall review the list provided by the Chief Executive Officer
of the Company and shall determine, in its sole discretion, whether to adjust the list of Participants and the proposed allocation of the Annual Funding to be credited to each such Participant’s Account. The Committee shall make the final
determination regarding the allocation of the Annual Funding to be credited to each such Participant’s Account. Receiving an allocation under the Plan in any year does not in any way entitle the Participant to receive an allocation in any
future year. 
 (c) Earnings. The Committee shall establish from time to time the hypothetical investment(s) made
available under the Plan from time to time for purposes of valuing Participant Accounts (each, an “Investment”). At any time, the Committee may, in its discretion, add one or more additional Investments under the Plan. In addition, the
Committee, in its sole discretion, may discontinue any Investment at any time, and provide for the portions of Participants’ Accounts designated to the discontinued Investment to be reallocated to another Investment. While a Participant’s
Account does not represent the Participant’s ownership of, or any ownership interest in, any particular assets, the Participant’s Account shall be adjusted in accordance with the Investment(s), subject to the conditions and procedures set
forth herein or established by the Committee from time to time. Any notional cash earnings generated under an Investment (such as interest and cash dividends and distributions) shall, at the Committee’s sole discretion, either be deemed to be
reinvested in that Investment or reinvested in one or more other Investment(s) designated by the Committee. All notional acquisitions and dispositions of Investments under a Participant’s Account shall be deemed to occur at such times as the
Committee shall determine to be administratively feasible in its sole discretion and the Participant’s Account shall be adjusted accordingly. In addition, a Participant’s Account may be adjusted from time to time, in accordance with
procedures and practices established by the Committee, in its sole discretion, to reflect any notional transactional costs and other fees and expenses relating to the deemed investment, disposition or carrying of any Investment for the
Participant’s Account. 
 Section 3. Vesting. A Participant shall become vested in his or her Account upon the
earliest to occur of: 
 (a) the date upon which the Participant attains age 62; 

(b) the date of the Participant’s death; 
 (c) the date of a termination of the Participant’s employment by the Company because of Disability, as defined below; 
 (d) the date of a termination of the Participant’s employment by the Company in a manner that entitles the Participant to receive a severance benefit pursuant to the Company’s Severance Plan, as
then in effect; or 

  
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 (e) the date upon which the Company undergoes a Change in Control, as defined below;
provided, in each case, that such Participant remains employed by the Company from the date the Participant received the allocation to his or her Account until the date on which such Account becomes vested (the “Vesting Date”). For
purposes of the Plan, “Disability” shall mean the termination of the Participant’s employment relationship at a time when the Participant is disabled and qualifies to receive benefits under the Company’s long-term
disability plan, and “Change in Control” shall have the meaning ascribed to it in the LTIP. 

Section 4. Distributions. 
 (a) Form of Payment. The Participant may elect to receive a distribution of his or her Account in the form of: 
 (i) a lump-sum payment; 
 (ii) ten equal annual installment payments commencing
on the Distribution Date, and due on the next nine anniversaries of the Distribution Date; or 
 (iii) five equal annual
installment payments commencing on the Distribution Date, and due on the next four anniversaries of the Distribution Date. 
 In
the event a Participant elects a lump-sum payment pursuant to Section 4(a)(i), such payment shall be made by the end of the calendar year in which the Distribution Date occurs, or, if later, the 15th day of the third month following the
Distribution Date. In the event a Participant elects annual installment payments pursuant to Section 4(a)(ii) or Section 4(a)(iii): the first such installment payment shall be made by the end of the calendar year in which the Distribution
Date occurs, or, if later, the 15th day of the third month following the Distribution Date; and each subsequent installment payment shall be made by the end of the calendar year in which the appropriate anniversary of the Distribution Date occurs,
or, if later, the 15th day of the third month following the appropriate anniversary of the Distribution Date. The amount of each installment payment shall be equal to the value of the Participant’s Account divided by the number of installments
remaining to be paid. Under no circumstances will the Participant be permitted to directly or indirectly designate the year of payment. 
 (b) Initial Distribution Election. Within 30 days after a Participant first receives an award under the Plan, the Participant shall make a distribution election for his or her Account on such forms
and subject to such other terms and conditions not inconsistent with this Plan as are required by the Committee. The distribution election shall specify a Distribution Date pursuant to Section 4(c) and a form of payment pursuant to
Section 4(a). Any Participant who fails to make such elections within such period shall be deemed to have elected to receive a lump-sum payment on the six-month anniversary of the date on which such Participant separates from service, as
defined by Section 409A of the Code (a “Separation from Service”), with the Company. 
 (c)
Distribution Date. The amount allocated to a Participant’s Account under the Plan shall be distributed or commence to be distributed in the form elected by the Participant pursuant to Section 4(a) at one of the following times
occurring on or after the Vesting Date as the Participant shall elect (the “Distribution Date”): 

  
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 (i) on the Participant’s Vesting Date; provided, however, that if a
Participant elects “Vesting Date” as his or her Distribution Date, his or her Account shall be payable as follows: 

(A) If the Participant becomes vested in his or her Account under Section 3(c) due to a termination of the Participant’s
employment by the Company because of Disability, then no payment shall be made unless such termination of employment constitutes a Separation from Service. In the event that such termination of employment does not constitute a Separation from
Service, then the Participant’s Account shall still fully vest upon such termination of employment, but shall not be payable until the next following permissible Distribution Date. 

(B) If the Participant becomes vested in his or her Account under Section 3(d) due to a termination of the Participant’s
employment by the Company in a manner that entitles the Participant to receive a severance benefit pursuant to the Company’s Severance Plan, then no payment shall be made unless such termination of employment constitutes a Separation from
Service. In the event that such termination of employment does not constitute a Separation from Service, then the Participant’s Account shall still fully vest upon such termination of employment, but shall not be payable until the next
following permissible Distribution Date. 
 (C) If the Participant becomes vested in his or her Account due to a Change in
Control of the Company under Section 3(e), then no payment shall be made unless such Change in Control constitutes a “change in the ownership of the corporation,” “a change in effective control of the corporation,” or
“a change in the ownership of a substantial portion of the assets of the corporation” within the meaning of Section 409A of the Code (collectively, a “Section 409A Change in Control”). In the event that such Change in
Control does not constitute a Section 409A Change in Control, then the Participant’s Account shall still fully vest upon such Change in Control, but shall not be payable until the next following permissible Distribution Date. 

(ii) on the six-month anniversary of the date on which such Participant undergoes a Separation from Service with the Company after the
Vesting Date; or 
 (iii) on the first day of any calendar year beginning after the year in which the Participant attains age
62 but not later than the calendar year in which the Participant attains age 70. 
 (d) Subsequent Distribution
Elections. Subject to any restrictions that may be imposed by the Committee, a Participant may change his or her distribution election at any time, and from time to time; provided, however, that: 

(i) the election may not take effect until the first anniversary of the date on which such election change is submitted to the Company
on a form prescribed by the Company; 
 (ii) no such election shall be effective if the Participant is previously scheduled to
receive distributions under the Plan within one year following the date on which such election change is submitted to the Company; 

  
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 (iii) such election provides for a Distribution Date that is at least five years later than
the previous Distribution Date, in accordance with Section 409A of the Code; 
 (iv) a Participant who elects
“Vesting Date” as his or her Distribution Date under Section 4(a) shall only be permitted to make a subsequent election as to the form of payment pursuant to Section 4(a); 

(v) a Participant who does not elect “Vesting Date” as his or her Distribution Date under Section 4(b) shall not be
permitted to elect “Vesting Date” as his or her Distribution Date under this Section 4(d). 
 For the avoidance
of doubt, if a Participant elected to commence payment on the first day of a specific calendar year under Section 4(c)(iii), then no subsequent distribution election shall be effective if the effect of such election is that payment is made or
commences under Section 4(c)(iii) later than the calendar year in which the Participant attains age 70. In the event an election change does not become effective, the prior valid election of such Participant shall govern the form of
distribution. 
 (e) Death. In the event a Participant dies before such Participant’s distribution has begun or has
been paid in full, any unpaid portion of such Participant’s vested Account under the Plan shall be paid to the beneficiary designated by the Participant, or if no beneficiary has been designated, to the Participant’s estate. Such unpaid
portion shall be paid in a lump sum by the end of the calendar year in which the Participant died or, if later, the 15th day of the third month following the date of the Participant’s death. Under no circumstances will the beneficiary be
permitted to directly or indirectly designate the year of payment. 
 (f) Allocations following Vesting Date. 

(i) If a Participant elected a Distribution Date of either “Vesting Date” (pursuant to Section 4(c)(i)) or the first day
of a calendar year beginning after the year in which the Participant attains age 62 but not later than the calendar year in which the Participant attains age 70 (pursuant to Section 4(c)(iii)) under his or her initial distribution election
under Section 4(b), then the following provisions shall apply: 
 (A) Subject to Section 4(f)(iii), the allocations,
if any, to a Participant’s Account at any time within one year of or after his or her original Vesting Date shall not vest until the one-year anniversary of the date that the allocation is credited to the Participant’s Account, and shall
be distributed to the Participant as a lump-sum payment on the six-month anniversary of the date on which such Participant undergoes a Separation from Service after such vesting date. 

(B) Allocations to the Participant’s Account prior to his or her Vesting Date shall continue to be governed by the
Participant’s initial distribution election under Section 4(b). 
 (ii) If a Participant elected the six-month
anniversary of the date on which he or she undergoes a Separation from Service with the Company after the original Vesting Date (pursuant to Section 4(c)(ii)) as the Distribution Date under his or her initial distribution election

  
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under Section 4(b), then, subject to Section 4(f)(iii), any allocations to such Participant’s account within one year of or after such original Vesting Date shall not vest until
the one-year anniversary of the date that the allocation is credited to the Participant’s Account. However, the time and form of payment of any allocations to such Participant’s Account shall continue to be governed by the
Participant’s initial distribution election under Section 4(b). 
 (iii) Accelerated Vesting. Allocations to a
Participant’s Account under this Section 4(f) shall become immediately vested upon the first to occur of any of the events set forth in Sections 3(b), (c), (d) or (e). 

(g) Medium of Payment. The portion of each Account, if any, that is deemed invested in shares of Common Stock shall be distributed
in shares of unrestricted Common Stock and all other distributions under the Plan shall be paid in cash. 
 Section 5.
Forfeitures. 
 (a) Termination Prior to Vesting Date. In the event a Participant’s employment with the Company
terminates prior to such Participant’s Vesting Date, then the Participant’s Account under the Plan shall be forfeited. 
 (b) Violation of Restrictive Covenants. In the event a Participant violates the provisions of Section 6 prior to the Participant’s Distribution Date or the date(s) any payment are due
after a Participant’s Distribution Date, then the unpaid portion of the Participant’s Account under the Plan shall be forfeited. 
 Section 6. Restrictive Covenants; Clawback. 
 (a) If, at any time
before the later of (i) ten years after the Vesting Date; or (ii) two years after the final payment of any installment due to the Participant after the Distribution Date, the Participant, in the sole determination of the management of the
Company, engages in any activity in competition with any activity of the Company, or inimical, contrary or harmful to the interests of the Company, including, but not limited to:(1) conduct related to his or her employment for which either criminal
or civil penalties against him may be sought, (2) violation of Company policies, including, without limitation, the Company’s Insider Trading Policy, (3) directly or indirectly, soliciting, placing, accepting, aiding, counseling or
consulting in the renewal, discontinuance or replacement of any insurance or reinsurance by, or handling self-insurance programs, insurance claims or other insurance administrative functions (“insurance services”) for, any existing
Company account or any actively solicited prospective account of the Company for which the Participant performed any of the foregoing functions during the two-year period immediately preceding such termination or providing any employee benefit
brokerage, consulting, or administration services, in the areas of group insurance, defined benefit and defined contribution pension plans, individual life, disability and capital accumulation products, investment advisory services and all other
employee benefit areas (“benefit services”) the Company is involved with, for any existing Company account or any actively solicited prospective account of the Company for which the Participant performed any of the foregoing
functions during the two-year period immediately preceding such termination or, if the Participant has not terminated employment, the date of the prohibited activity (the term 

  
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Company account as used in this Section shall be construed broadly to include all users of insurance services or benefit services including commercial and individual consumers, risk managers,
carriers, agents and other insurance intermediaries), (4) the rendering of services for any organization which is competitive with the Company, (5) employing or recruiting any current or former employee of the Company, (6) disclosing
or misusing any confidential information or material concerning the Company, or (7) participating in a hostile takeover attempt of the Company, then the Participant’s Account shall be forfeited effective as of the date on which the
Participant enters into such activity, unless terminated sooner by operation of another term or condition of this Plan, and any payments made from a Participant’s Account to such Participant from and after the Distribution Date shall be repaid
by the Participant to the Company. Such repayment shall include interest measured from the first date the Participant engaged in any of the prohibited activities set forth above at the highest rate allowable under Delaware law. 

(b) By participating in the Plan, each Participant acknowledges that the Participant’s engaging in activities and behavior in
violation of Section 6(a) above will result in a loss to the Company which cannot reasonably or adequately be compensated in damages in an action at law, that a breach of Section 6(a) will result in irreparable and continuing harm to the
Company and that therefore, in addition to and cumulative with any other remedy which the Company may have at law or in equity, the Company shall be entitled to injunctive relief for a breach of Section 6(a) by the Participant. By participating
in the Plan each Participant acknowledges and agrees that the requirement in Section 6(a) above that Participant disgorge and pay over to the Company any payments received from the Participant’s Account by such Participant is not a
provision for liquidated damages. The Participant agrees to pay any and all costs and expenses, including reasonable attorneys’ fees, incurred by the Company in enforcing any breach of any covenant in this Plan. 

(c) To the extent permitted by Section 409A, by participating in the Plan, each Participant consents to deductions from any amounts
the Company owes the Participant from time to time (including amounts owed as wages or other compensation, fringe benefits or vacation pay, as well as any other amounts owed to the Participant by the Company) to the extent of the amounts the
Participant owes the Company under Section 6(a) above. Whether or not the Company elects to make any set-off in whole or in part, if the Company does not recover by means of setoff the full amount owed, calculated as set forth above, the
Participant agrees to pay immediately the unpaid balance to the Company. 
 Section 7. The number of shares of
Common Stock allocated to each Participant’s Account shall be appropriately adjusted, in the sole discretion of the Committee, to reflect any stock split, stock dividend, recapitalization, reorganization, merger, consolidation, combination,
exchange of shares, liquidation, spin-off or other similar change in capitalization or event, and the reinvestment of cash dividends. 
 Section 8. Amendment or Termination of the Plan. 
 (a) Plan
Amendment. The Company reserves the right to amend the Plan at any time and for any reason, including such amendments as are necessary to comply with the requirements of section 409A of the Code, by action of the Chief Executive Officer of the

  
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Company. The Company also reserves the right to suspend the Plan at any time, for any given calendar year or otherwise; provided, however, that in the event of a suspension of the
Plan, the Participants’ Accounts shall remain payable in accordance with the Participant’s payment election and the terms of this Plan 
 (b) Plan Termination. The Company has no obligation to maintain the Plan for any length of time and may terminate the Plan at any time in a manner that complies with the requirements of
Section 409A of the Code. The Plan may terminate the Plan and accelerate the time and form of payment under the Plan only as permitted by Treasury Regulation 1.409A-3(j)(4)(ix), which generally permits: 

(i) Change in Control Event. In the event of a Section 409A Change in Control of the Company, the Plan may be terminated and
liquidated pursuant to irrevocable action taken during the period commencing thirty (30) days before and ending twelve (12) months after the Section 409A Change in Control, but only if: (A) all arrangements sponsored by the
Company that would be aggregated with the Plan pursuant to Treasury Regulation 1.409A-1(c) are terminated and liquidated with respect to every participant who experienced such Section 409A Change in Control; and (B) all amounts payable
under such single plan for such participants are paid within 12 months after the irrevocable action is taken. 
 (ii)
Liquidation and Dissolution of the Company. In the event of a complete liquidation and dissolution of the Company, the Company shall terminate the Plan within twelve (12) months of the liquidation and dissolution of the Company and the
value of Participant’s Accounts under the Plan shall be determined as of that date and shall be distributed to the Participants or their beneficiaries; provided, however, that the benefits payable under the Plan are included in
the gross income of the Participants or their beneficiaries in the latest of: (A) the calendar year in which the Plan termination occurs; (B) the calendar year in which the amount is no longer subject to a substantial risk of forfeiture;
or (C) the first calendar year in which the payment is administratively practicable. 
 (iii) Discretionary
Termination. The Company may, at its sole and absolute discretion, determine to terminate the Plan, provided that: (A) the termination does not occur proximate to a downturn in the financial health of the Company, (B) all arrangements
sponsored by the Company that would be aggregated with the Plan pursuant to Treasury Regulation 1.409A-1 (c) if the same Participant participated in all of the arrangements are terminated; (C) no payments other than the payments that would
be payable under the terms of the arrangements if the termination had not occurred are made within twelve (12) months of the termination of the arrangements; (D) all payments are made within twenty four (24) months of the termination
of the arrangements; and (E) the Company does not adopt a new arrangement that would be aggregated with any terminated arrangement under Treasury Regulation 1.409A-1(c) if the same Participant participated in both arrangements, at any time
within three (3) years following the date of termination of the arrangements. 
 (c) Other Permissible
Accelerations. 
 (i) Section 409A Failure. An acceleration of the time of payment under the Plan to a
Participant shall be permitted at any time the Plan fails to meet the requirements of 

  
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Section 409A; provided, however, that the payment made based upon the acceleration for the failure to meet the requirements of Section 409A may not exceed the amount
required to be included in income as a result of the failure to comply with the requirements of Section 409A. 
 (ii)
Event of Taxation. If, for any reason, all or any portion of a Participant’s Account under the Plan becomes taxable to the Participant prior to receipt, a Participant may petition the Committee before a Change in Control, or the trustee
after a Change in Control, for a distribution of the state, local or foreign taxes owed on that portion of his or her benefit that has become taxable. Upon the grant of such a petition, which grant shall not be unreasonably withheld, the Company
shall, to the extent permissible under Section 409A, distribute to the Participant immediately available funds in an amount equal to the state, local and foreign taxes owed on the portion of the Participant’s Account that has become
taxable. If the petition is granted, the tax liability distribution shall be made within 90 days of the date that the Participant’s Account under the Plan became taxable. Such a distribution shall affect and reduce the benefits to be paid to
the Participant under the Plan. 
 This Section 8 shall be construed and administered in a manner consistent with
Section 409A of the Code and Treasury Regulation 1.409A-3 (j)(4)(ix) or the corresponding provision in future guidance issued by the Internal Revenue Service or the Treasury. 

Section 9. Compliance with Section 409A. It is intended that any amounts payable under this Plan will comply with
Section 409A of the Code, and the regulations promulgated thereunder, so as not to subject any Participant to the payment of any interest and tax penalty which may be imposed under Section 409A of the Code, and the Plan shall be
interpreted accordingly; provided, however, that the Company shall not be responsible for any such interest and tax penalties. To the extent permissible under Section 409A of the Code, the timing of the payments or benefits
hereunder may be modified to so comply with Section 409A of the Code. Notwithstanding any Plan provision to the contrary, to the extent any Participant is entitled to receive a payment under the Plan upon such Participant’s Separation from
Service, such payment shall be made on the date that is six months after the date of such Separation from Service. 

Section 10. Consent to Transfer Personal Data. By participating in this Plan, a Participant voluntarily acknowledges and
consents to the collection, use, processing and transfer of personal data as described in this Section. Participants are not obliged to consent to such collection, use, processing and transfer of personal data. However, failure to provide the
consent may affect the Participant’s ability to participate in the Plan. The Company holds certain personal information about the Participant, that may include his or her name, home address and telephone number, date of birth, social security
number or other employee identification number, salary grade, hire data, salary, nationality, job title, any shares of stock held in the Company, or details of all awards under the Plan, for the purpose of managing and administering the Plan
(“Data”). The Company will transfer Data amongst themselves as necessary for the purpose of implementation, administration and management of Participant’s participation in the Plan, and the Company may each further transfer
Data to any third parties assisting the Company in the implementation, administration and management of the Plan. These recipients may be located throughout the world, including the United States. Each Participant authorizes them to receive,
possess, use, retain and transfer the Data, in electronic or other form, for the purposes of implementing, administering and managing the Participant’s participation in the Plan, including

  
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any requisite transfer of such Data as may be required for the administration of the Plan and/or the subsequent holding of shares of stock on the Participant’s behalf to a broker or other
third party with whom the Participant may elect to deposit any shares of stock acquired pursuant to the Plan. A Participant may, at any time, review Data, require any necessary amendments to it or withdraw the consents herein in writing by
contacting the Company; however, withdrawing consent may affect the Participant’s ability to participate in the Plan. 

Section 11. Administration. This Plan shall be administered by the Committee. The Committee shall, subject to the terms of
this Plan, interpret this Plan and the application thereof, establish rules and regulations it deems necessary or desirable for the administration of this Plan and may impose, incidental to the grant of an award, conditions with respect to any
award. All such interpretations, rules, regulations and conditions shall be final, binding and conclusive. Subject to applicable law, the Committee may delegate some or all of its power and authority hereunder to the Board or the Chief Executive
Officer or other executive officer of the Company as the Committee deems appropriate; provided, however, that the Committee may not delegate its power and authority to the Chief Executive Officer or other executive officer of the
Company with regard to the selection for participation in this Plan of an officer or other person subject to Section 16 of the Securities Exchange Act of 1934, as amended, or decisions concerning the timing or amount of an award to such an
officer or other person. No member of the Board or Committee, and neither the Chief Executive Officer nor any other executive officer to whom the Committee delegates any of its power and authority hereunder, shall be liable for any act, omission,
interpretation, construction or determination made in connection with this Plan in good faith, and the members of the Board and the Committee and the Chief Executive Officer or other executive officer shall be entitled to indemnification and
reimbursement by the Company in respect of any claim, loss, damage or expense (including attorneys’ fees) arising therefrom to the full extent permitted by law, except as otherwise may be provided in the Company’s Certificate of
Incorporation and/or By-laws, and under any directors’ and officers’ liability insurance that may be in effect from time to time. 
 Section 12. Non-Transferability of Accounts. No Account shall be transferable other than by will, the laws of descent and distribution or pursuant to beneficiary designation procedures
approved by the Company. Except to the extent permitted by the preceding sentence, no Account may be sold, transferred, assigned, pledged, hypothecated, encumbered or otherwise disposed of (whether by operation of law or otherwise) or be subject to
execution, attachment or similar process. Upon any attempt to so sell, transfer, assign, pledge, hypothecate, encumber or otherwise dispose of any such Account, such Account and all rights thereunder shall immediately become null and void.

 Section 13. Tax Withholding. The Company shall have the right to withhold or require payment by each Participant
of any Federal, state, local or other taxes which may be required to be withheld or paid in connection with the vesting or distribution of such Participant’s Account. 
 Section 14. Restrictions on Shares. Each award made hereunder shall be subject to the requirement that if at any time the Company determines that the listing, registration or qualification of
the shares of Common Stock subject to such award upon any securities exchange or under any law, or the consent or approval of any governmental body, or the taking of any other action is necessary or desirable as a condition of, or in connection
with, the delivery of 

  
 10 

 
shares pursuant to an award granted under this Plan, no shares shall be so delivered unless such listing, registration, qualification, consent, approval or other action shall have been effected
or obtained, free of any conditions not acceptable to the Company. The Company may require that certificates evidencing shares of Common Stock delivered pursuant to the Plan bear a legend indicating that the sale, transfer or other disposition
thereof by the holder is prohibited except in compliance with the Securities Act of 1933, as amended, and the rules and regulations thereunder. 
 Section 15. No Right of Participation or Employment. No person shall have any right to participate in this Plan. Neither this Plan nor any award made hereunder shall confer upon any person any
right to continued employment by the Company or affect in any manner the right of the Company to terminate the employment of any person at any time without liability hereunder. 

Section 16. No Rights as Stockholder. No person shall have any right as a stockholder of the Company with respect to any
shares of Common Stock or other equity security of the Company which is subject to this Plan unless and until such person becomes a stockholder of record with respect to such shares of Common Stock or equity security. 

Section 17. Designation of Beneficiary. If permitted by the Company, a Participant may file with the Company a written
designation of one or more persons as such Participant’s beneficiary or beneficiaries (both primary and contingent) in the event of the Participant’s death. Each beneficiary designation shall become effective only when filed in writing
with the Company during the Participant’s lifetime on a form prescribed by the Company. The spouse of a married Participant domiciled in a community property jurisdiction shall join in any designation of a beneficiary other than such spouse.
The filing with the Company of a new beneficiary designation shall cancel all previously filed beneficiary designations. 

Section 18. Governing Law. This Plan and all determinations made and actions taken pursuant thereto, to the extent not
otherwise governed by the laws of the United States, shall be governed by the laws of the State of Delaware and construed in accordance therewith without giving effect to principles of conflicts of laws. 

Section 19. Claims Procedure. The claims procedure of the Arthur J. Gallagher & Co. Employees’ 401(k) Savings
and Thrift Plan shall apply to this Plan. 
 Section 20. Electronic Documents Permitted. Subject to applicable law,
distribution election forms and other forms or documents may be in electronic format or made available through means of online enrollment or other electronic transmission. 
 Section 21. Status of Plan. The Plan is intended to be: (i) a plan that is not qualified within the meaning of Section 401(a) of the Code and (ii) a plan that “is unfunded
and is maintained by an employer primarily for the purpose of providing deferred compensation for a select group of management or highly compensated employees” within the meaning of Sections 201(2), 301(a)(3) and 401(a)(1) of ERISA. The Plan
shall be administered and interpreted to the extent possible in a manner consistent with that intent. All Accounts and all credits and other adjustments to such Accounts shall be bookkeeping entries only and shall be utilized solely as a device for
the measurement and determination of amounts to be paid under the Plan. 

  
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 Section 22. Foreign Employees. Without amending this Plan, the Chief Executive
Officer of the Company and/or the Committee may grant awards to eligible persons outside the United States on such terms and conditions different from those specified in this Plan as may in their judgment be necessary or desirable to foster and
promote achievement of the purposes of this Plan and, in furtherance of such purposes the Chief Executive Officer and/or the Committee may make such modifications, amendments, procedures, sub-plans and the like as may be necessary or advisable to
comply with provisions of laws in other countries or jurisdictions in which the Company operates or has employees. 
  

 

  
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