Document:

SICO Support Agreement, dated as of December 9, 2008

 Exhibit 10.2 
 December 9, 2008 
 A. O. Smith
Corporation 
 11270 West Park Place 
 Milwaukee, WI 53224

 Attention: James F. Stern 
 Smith Investment Company

 11270 West Park Place 
 Milwaukee, WI 53224 
 Attention: Bruce M. Smith 
 Ladies and Gentlemen: 
 Smith Investment Company, a Nevada corporation (“SICO”), Smith Investment Company LLC, a Delaware limited liability company
(“SpinCo”), A. O. Smith Corporation, a Delaware corporation (the “Company”), and SICO Acquisition, LLC, a Delaware limited liability company and a wholly-owned subsidiary of the Company (“Merger
Sub”), are parties to an Agreement and Plan of Merger, dated as of the date hereof (as the same may be amended, supplemented, modified or waived from time to time, the “Merger Agreement”), providing for, among other things,
the merger of SICO with and into Merger Sub (the “Merger”), in which all of the outstanding shares of common stock, par value $0.10 per share, of SICO (“SICO Common Stock”) held by the shareholders of SICO are being
converted into a right to receive shares of Class A common stock, par value $5.00 per share, of the Company and shares of Common Stock, par value $1.00 per share, of the Company. Each of the parties signatory hereto are stockholders of SICO
(each, individually, a “Stockholder” and, collectively, the “Stockholders”). Capitalized terms that are used but not otherwise defined in this support agreement (“Support Agreement”) will have the
meanings ascribed to them in the Merger Agreement. 
 As a condition to the willingness of the Company and SICO to enter into and perform
their respective obligations under the Merger Agreement, the Company and SICO have required that each Stockholder enter into this Support Agreement. Each Stockholder is further entering into this Support Agreement to express its support for the
Merger and the other transactions contemplated by the Merger Agreement. 
 In consideration of the foregoing and the mutual covenants and
agreements set forth herein and in the Merger Agreement, and intending to be legally bound hereby, the parties hereto agree as follows: 

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 1. Each Stockholder represents and warrants that the list showing ownership by each of the Stockholders,
provided to the Company and SICO (the “List”), sets forth as of the date hereof the number of shares of SICO Common Stock owned beneficially or of record by such Stockholder (the “Covered Shares”). Each Stockholder
represents and warrants that, as of the date hereof, such Stockholder owns its Covered Shares free and clear of all liens, charges, encumbrances, voting agreements and commitments of every kind, except for such liens, charges, encumbrances, voting
agreements and commitments that would not prevent or delay the performance by such Stockholder of its obligations under this Support Agreement or the transactions contemplated hereby. As of the date of this Support Agreement, except as expressly
permitted or provided in this Support Agreement or the Merger Agreement and except as disclosed on the List, each Stockholder has sole voting power and sole dispositive power with respect to all of its Covered Shares. Each Stockholder agrees, while
this Support Agreement is in effect, to endeavor to promptly notify the Company and SICO of the number of any new shares of SICO Common Stock with respect to which such Stockholder acquires beneficial or record ownership. Any such shares shall
automatically become Covered Shares and subject to the terms of this Support Agreement as though owned by such Stockholder as of the date hereof. 
 2. Each Stockholder has all necessary legal capacity, power and authority to execute and enter into this Support Agreement, and this Support Agreement is the legally valid and binding agreement of such Stockholder, and, other than Paragraph
7 as to which the Stockholders make no representation, is enforceable against such Stockholder in accordance with its terms, subject to the Bankruptcy and Equity Exception. 
 3. Each Stockholder represents and warrants that (A) except for filings as may be required under, and other applicable requirements of, the Exchange
Act, no filing with, and no permit, authorization, consent or approval of, any state, federal or foreign public body or authority is necessary for the execution of this Support Agreement by such Stockholder and the consummation by such Stockholder
of the transactions contemplated hereby and (B) none of the execution and delivery of this Support Agreement by such Stockholder, the consummation by such Stockholder of the transactions contemplated hereby or compliance by such Stockholder
with any of the provisions hereof shall (i) result in a violation or breach of, or constitute (with or without notice or lapse of time or both) a default (or give rise to any third party right of termination, cancellation, material modification
or acceleration of any obligation or to a loss of a material benefit) under any of the terms, conditions or provisions of any contract, agreement or arrangement to which such Stockholder is a party or by which such Stockholder may be bound in a
manner that would render such Stockholder unable to perform its covenants and agreements set forth in this Support Agreement, including any voting agreement, stockholders agreement, irrevocable proxy, voting trust or organizational document, or
(ii) violate any law, order, injunction, judgment, decree or award of any court, Governmental Authority or arbitrator applicable to such Stockholder. 

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 4. Each Stockholder agrees that, during the term of this Support Agreement, it will not, and will not
agree to, sell, transfer, assign, pledge, encumber or otherwise dispose of any of the Covered Shares, or any interest therein, or otherwise enter into any contract, option or other arrangement or understanding with respect to the sale, transfer,
assignment, pledge, encumbrance of other disposition of, or limitation on the voting rights of, any of the Covered Shares (any such action a “Transfer”); provided however, that nothing herein shall prevent such Stockholder from
consummating a Transfer (i) to another Stockholder, (ii) as specifically required by a court order, which such Stockholder shall use its reasonable best efforts to avoid, (iii) pursuant to this Support Agreement or the Merger
Agreement or the transactions and other agreements contemplated thereby, (iv) as required by such Stockholder’s trust documents, or (v) with the Company’s and SICO’s prior written consent. Any action taken in violation of
the foregoing sentence shall be null and void ab initio and each Stockholder agrees that any such prohibited action may and should be enjoined. If any involuntary Transfer of any of the Covered Shares shall occur, the transferee (which term, as used
herein, shall include any and all transferees and subsequent transferees of the initial transferee) shall take and hold the Covered Shares subject to all of the restrictions, liabilities and rights under this Support Agreement, which shall continue
in full force and effect until valid termination of this Support Agreement. 
 5. Each Stockholder agrees that, during the term of this
Support Agreement, at any meeting of SICO stockholders, however called, or any adjournment or postponement thereof, such Stockholder shall be present (in person or by proxy) and vote (or cause to be voted) all of the Covered Shares (1) in favor
of (a) the Merger and the other transactions contemplated thereby, including the Merger Agreement and (b) any other matter that is on the ballot in furtherance of or for the purpose of facilitating the Merger, including any matter that is
required by law or regulatory authority to be approved by the stockholders of SICO to facilitate the Merger or any transaction contemplated by the Merger Agreement; and (2) against (X) any proposal that would reasonably be expected to
prevent or materially delay the consummation of the Merger and (Y) any proposal directly resulting from or related to a Company Intervening Event that resulted in the modification or withdrawal of the Company Recommendation. 
 6. Each Stockholder further agrees that, during the one year period following any termination of the Merger Agreement by the Company pursuant to
Section 8.1(e) of the Merger Agreement, at any meeting of SICO stockholders, however called, or any adjournment or postponement thereof, such Stockholder shall be present (in person or by proxy) and vote (or cause to be voted) all of the
Covered Shares against any proposal directly resulting from or related to the Company Intervening Event that resulted in the modification or withdrawal of the Company Recommendation. 
 7. Each Stockholder hereby (i) waives, to the fullest extent of the law, and agrees not to assert any dissenters’ or appraisal rights in
connection with the Merger, including pursuant to Section 92A.380 of the Nevada Revised Statutes or otherwise, with respect to any and all Covered Shares; and (ii) agrees not to commence or participate in, and agrees to take all actions
necessary to opt out of any class in any class action with respect to any claim, derivative or otherwise, against the Company, Merger Sub, SICO or any of their respective successors relating to the negotiation, execution or delivery of this Support
Agreement, the Merger Agreement or the consummation of the Merger, including any claim (a) challenging the validity of, or seeking to enjoin the operation of, any provision of this Support Agreement, the Merger Agreement or any transactions
contemplated by the Merger Agreement, or (b) alleging a breach of any fiduciary duty of any officers or directors of the Company, Merger Sub or SICO in connection with this Support Agreement, the Merger or any of the transactions contemplated
by the Merger, including the Merger Agreement. For the avoidance of doubt, the parties agree that this Paragraph 7 shall not preclude a Stockholder from being a party to any litigation between or among the Company, Merger Sub, SICO, the
Surviving Entity, SpinCo, the Shareholders’ Representative, any Smith Family Member or any other Former Company Shareholder concerning any provision of the Merger Agreement or any Ancillary Agreement or to resolve any dispute regarding any
provision of the Merger Agreement or any Ancillary Agreement 

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 8. Each Stockholder agrees that, except for filings under the Exchange Act or otherwise required by
applicable Law, such Stockholder shall not issue any press release or make any public announcement relating to the subject matter of the Merger Agreement, whether prior to or following the termination of this Support Agreement, without the prior
written consent of the Company and SICO. 
 9. Whenever possible, each provision or portion of any provision of this Support Agreement will
be interpreted in such manner as to be effective and valid under applicable law but if any provision or portion of any provision of this Support Agreement is held to be invalid, illegal or unenforceable in any respect under any applicable law or
rule in any jurisdiction, such invalidity, illegality or unenforceability will not affect any other provision or portion of any provision in such jurisdiction, and this Support Agreement will be reformed, construed and enforced in such jurisdiction
as if such invalid, illegal or unenforceable provision or portion of any provision had never been contained herein. 
 10. Each of the
parties hereto recognizes and acknowledges that a breach by any Stockholder of any covenants or agreements contained in this Support Agreement will cause the Company and SICO to sustain damages for which it would not have an adequate remedy at law
for money damages, and therefore each of the parties hereto agrees that in the event of any such breach the Company and SICO shall be entitled to the remedy of specific performance of such covenants and agreements and injunctive and other equitable
relief in addition to any other remedy to which they may be entitled, at law or in equity. 
 11. Notwithstanding any other provision herein,
the obligations of each Stockholder set forth in this Support Agreement shall not be effective or binding until after such time as the Merger Agreement is executed and delivered by the Company, Merger Sub, SpinCo and SICO. This Support Agreement
shall terminate immediately upon the earlier of (a) termination of the Merger Agreement in accordance with its terms, (b) the Company Recommendation having been withdrawn or modified in a manner that would permit the Company to terminate
the Merger Agreement in accordance with its terms, and (c) the Effective Time. Upon such termination, this Support Agreement shall immediately become void, there shall be no liability hereunder on the part of any Stockholder and all rights and
obligations of the parties to this Support Agreement shall cease, in all cases so long as such Stockholder is not in breach of its covenants or agreements under this Support Agreement; provided, however, that Paragraphs 6 through 17 hereof shall
survive termination of this Support Agreement (it being understood that Section 10 shall survive solely to the extent necessary to effect the provisions of Sections 6, 7 and 8). 

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 12. Any notice, request, instruction or other document to be given hereunder by any party to the other
parties shall be in writing and shall be deemed to have been duly given on the next business day after the same is sent, if delivered personally or sent by telecopy or overnight delivery, or three calendar days after the same is sent, if sent by
registered or certified mail, return receipt requested, postage prepaid, as set forth below, or to such other persons or addresses as may be designated in writing in accordance with the terms hereof by the party to receive such notice. 

If to a Stockholder, to: 
 The address indicated for each
Stockholder on the signature page to this Support Agreement. 
 with a copy (which shall not constitute notice) to: 
 Bruce M. Smith 
 c/o Smith Investment
Company 
 11270 West Park Place 
 Milwaukee, WI 53224 
 Facsimile: 414-359-4198 
 with a copy (which shall not constitute notice) to: 
 Quarles & Brady LLP 
 411 East Wisconsin Avenue, Suite 2040 
 Milwaukee, Wisconsin 53202 
 Facsimile: 414-271-3552 
 Attention: Kenneth V. Hallett 
 If to SICO: 
 Smith Investment Company 
 11270 West Park
Place 
 Milwaukee, WI 53224 
 Facsimile: 414-359-4198 
 Attention: Bruce M. Smith 
 with a copy (which shall not constitute notice) to: 
 Latham & Watkins LLP 
 233 South Wacker Drive, Suite 5800 
 Chicago, Illinois 60606 
 Facsimile: 312-993-9767 
 Attention: Mark D. Gerstein 

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 with a copy (which shall not constitute notice) to: 
 Reinhart Boerner Van Deuren s.c. 
 1000
North Water Street, Suite 1700 
 Milwaukee, Wisconsin 53202 
 Facsimile: 414-298-8097 
 Attention: James M. Bedore 
 If to the Company: 
 A. O. Smith Corporation

 11270 West Park Place 
 Milwaukee, WI 53224 
 Facsimile: 414-359-7450 
 Attention: General Counsel 
 13. This Support Agreement shall be governed by, and construed in accordance
with, the laws of the State of Delaware, without reference to principles of conflicts of law. The parties hereto (a) agree that any action or proceeding arising out of or in connection with this Agreement shall be brought only in the Court of
Chancery of the State of Delaware (the “Court”) and not in any other state or federal court in the United States of America or any court in any other country; (b) consent to submit to the exclusive jurisdiction of the Delaware Court
for purposes of any action or proceeding arising out of or in connection with this Agreement; (c) agree that mailing of process or other papers in connection with such action, suit or proceeding in the manner provided in Paragraph 12 hereof or
in such other manner as may be permitted by law will have the same legal force and validity as if served upon such party personally within the State of Delaware; (d) waive any objection to the laying of venue of any such action or proceeding in
the Court; and (e) waive, and agree not to plead or to make, any claim that any such action or proceeding brought in the Court has been brought in an improper or inconvenient forum, or is subject (in whole or in part) to a jury trial.

 14. This Support Agreement may be executed in any number of counterparts and by the parties hereto on separate counterparts but all such
counterparts shall together constitute one and the same Support Agreement. 
 15. This Support Agreement, together with the Merger Agreement
and the other agreements contemplated thereby, constitutes the entire agreement among the parties with respect to the subject matter of this Support Agreement and supersedes all prior written and oral and all contemporaneous oral agreements and
understandings with respect to the subject matter of this Support Agreement. 
 16. This Support Agreement may not be amended except by an
instrument in writing signed on behalf of all the parties. 

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 17. This Support Agreement is not intended to confer any rights or remedies upon any Person other than
the Parties to this Support Agreement. 
 [signature page follows] 

 Page 8 
  

 Please confirm that the foregoing correctly states the understanding between each Stockholder and SICO by
signing and returning to us a counterpart hereof. 
  

			
	 Very truly yours,

	
	 THE STOCKHOLDERS:

	
	 /s/ Arthur O. Smith

	Arthur O. Smith, individually
	
	 Address:
 740 East Bay Point Road
 Milwaukee, WI 53217-1350

	
	 /s/ Margaret B. Smith

	 Margaret B. Smith, individually

	
	 Address:
 740 East Bay Point Road
 Milwaukee, WI 53217-1350

 Page 9 
  

			
	 Arthur O. Smith III Trust dated 12/05/74
 Regina Smith Mallon Trust dated 12/05/74
 Maria L. Smith Trust dated 12/05/74
 Mark D. Smith Trust dated 12/05/74
 Dana K. Smith Trust dated 12/05/74
 Lucy W. Smith Trust u/a dated 12/29/52
 Robert Lewis Smith Family Trust dated
6/28/72
 Sierra Anne Steer Smith 2002 Trust dated 1/13/2003
 Lloyd David Smith 2003 Trust
 June E. Rhea Family Trust dated 1/5/71
 June Ellyn Rhea 1987 Trust
 Robin Rhea Family Trust dated 7/22/76
 June S. Rhea 1971 Revocable Trust f/b/o Lloyd Fay
 June S. Rhea 1971 Revocable
Trust f/b/o June Rhea
 June S. Rhea 1971 Revocable Trust f/b/o Robin Rhea
 June S. Rhea 1970 Trust f/b/o Lloyd Fay
 June S. Rhea 1970 Trust f/b/o June E. Rhea
 Lloyd Johns Fay Trust dated 11/6/74
 June Ellyn Rhea Trust dated 11/6/74
 Robin Rhea Trust dated 11/6/74
 June Rhea 1979 Family Trust f/b/o Lloyd Fay

 June Rhea 1979 Family Trust f/b/o June E. Rhea
 June Rhea 1979
Family Trust f/b/o Robin Robin

		
	By:	 	 /s/ Bruce M. Smith

		 	Bruce M. Smith, Trustee
		
		 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

 Page 10 
  

			
	 Taylor Benjamin Alt 2001 Trust
 Jonathon
Douglas Alt 2001 Trust
 L.B. Smith 1994 Trust
 Melissa Anne Smith
2003 Trust
 Amelia Paige McEneany Smith Minority Trust 6/24/96
 Amelia Paige McEneany Smith 1996 Trust 12/10/96
 Liam Quinn McEneany Smith 2000 Trust
 Alexandra Marie Smith 1987 Trust dated 11/06/87
 Alexandra Marie Smith Minority 1989 Trust 12/19/89
 Joshua Daniel Smith 1987 Trust dated 9/4/87
 Joshua Daniel Smith 1989 Minority
Trust dated 12/19/89
 Katherine Anne Smith 1988 Trust dated 12/23/88
 Katherine Anne Smith 1989 Minority Trust 12/19/89
 Anneliese Victoria Smith 1994 Trust
 Anneliese Victoria Smith 1994 Minority Trust
 Scott Gordon Linzmeyer 1987 Trust dated 3/10/87
 Scott Gordon Linzmeyer 1989 Minority Trust 12/19/89
 Lloyd E. Fay Irrevocable
2003 Trust

		
	By:	 	 /s/ Arthur O. Smith

		 	Arthur O. Smith, Trustee
		
		 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

 Page 11 
  

			
	Agnes G. Hummel Trust
		
	By:	 	 /s/ Arthur O. Smith

		 	Arthur O. Smith, Trustee
	
	 Address:
 740 E. Bay Point Road
 Milwaukee, WI 53217-1350

	
	 Robert Lewis Smith Trust u/a dated 11/12/52
 Roger Scott Smith Trust u/a dated 11/12/52
 Nancy Smith Linzmeyer Trust u/a dated 12/17/57

		
	By:	 	 /s/ Bruce M. Smith

		 	Bruce M. Smith, Trustee
		
		 	 /s/ Arthur O. Smith

		 	Arthur O. Smith, Trustee
		
		 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

	
	Bruce M. Smith Trust u/a dated 11/12/52
		
	By:	 	 /s/ Robert L. Smith

		 	Robert L. Smith, Trustee
		
		 	 /s/ Arthur O. Smith

		 	Arthur O. Smith, Trustee
		
		 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

 Page 12 
  

			
	Arthur O. Smith Revocable 1976 Trust
		
	By:	 	 /s/ Margaret B. Smith

		 	Margaret B. Smith, Trustee
		
		 	 /s/ Bruce M. Smith

		 	Bruce M. Smith, Trustee
		
		 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

	
	 Arthur O. Smith III Family Trust dated 12/29/76
 Mallon Family Trust
 Maria Lauren Smith Family Trust dated 12/27/79
 Mark Dean Smith Family Trust dated 8/12/82
 Dana K. Smith Family Trust dated 12/16/83

		
	By:	 	 /s/ Margaret B. Smith

		 	Margaret B. Smith, Trustee
		
		 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

 Page 13 
  

			
	 A.O. Smith Family 1973 Trust f/b/o Arthur O. Smith III
 A.O. Smith Family 1973 Trust f/b/o Maria L. Smith
 A.O. Smith Family 1973 Trust f/b/o Mark D. Smith
 A.O. Smith Family 1973 Trust f/b/o Dana K. Smith
 A.O. Smith Family 1973
Trust f/b/o Tracy Aaron Mallon

		
	By:	 	 /s/ Margaret B. Smith

		 	Margaret B. Smith, Trustee
		
		 	 /s/ Arthur O. Smith

		 	Arthur O. Smith, Trustee
	
	 Address:
 740 E. Bay Point Road
 Milwaukee, WI 53217-1350

	
	Bruce M. Smith Family Trust u/a dated 6/01/72
		
	By:	 	 /s/ Robert L. Smith

		 	Robert L. Smith, Trustee
		
		 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

 Page 14 
  

			
	 Jessica A. Mallon Minority Trust dated 12/27/83
 Robert A. Mallon Minority Trust dated 12/27/83
 Tracy A. Mallon 1987 Trust dated 4/15/87
 Lindsay Smith 1987 Trust dated 5/22/87
 Megan Elizabeth Smith 1987 Trust dated
12/12/87
 Jennifer Katherine Smith 1994 Trust dated 5/17/94

		
	By:	 	 /s/ A. O. Smith III

		 	A. O. Smith III, Trustee
		
		 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

	
	 Theresa Marie Banghart 1999 Trust dated 12/06/99
 Rebecca A. Banghart 1999 Trust dated 12/06/99

		
	By:	 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
		
		 	 /s/ Elizabeth Smith

		 	Elizabeth Smith, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

 Page 15 
  

			
	 Arthur Oliver Smith IV 1999 Trust dated 12/07/99
 Elizabeth Carter Smith 1999 Trust dated 12/07/99
 Katherine Lee Smith 1999 Trust dated 12/07/99

		
	By:	 	 /s/ Mark Dean Smith

		 	Mark Dean Smith, Trustee
		
		 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

	
	 Roger Scott Smith Family Trust u/a dated 6/29/72
 Nancy Smith Linzmeyer Family Trust u/a dated 9/27/73

		
	By:	 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

 Page 16 
  

			
	Confirmed as of the date
	 first above written:

	
	SMITH INVESTMENT COMPANY
	
	 By: /s/ Bruce M. Smith

	
	 Name: Bruce M. Smith

	
	 Title: Chairman, President and CEO

	
	A. O. SMITH CORPORATION
		
	 By:
	 	/s/ James F. Stern

			
		
	Name:	 	James F. Stern

			
		
	Title:	 	 Executive Vice President, General
 Counsel and
SecretaryStockholder Agreement, dated as of December 9, 2008

 Exhibit 10.3 
 STOCKHOLDER AGREEMENT 
 THIS STOCKHOLDER AGREEMENT (this “Agreement”),
dated as of December 9, 2008, is made by and among A. O. Smith Corporation, a Delaware corporation (the “Company”), and each Person signatory hereto or who becomes signatory hereto in accordance with the terms of this Agreement
(each, individually, a “Stockholder” and, collectively, the “Stockholders”). All terms used, but not otherwise defined herein, shall have those meanings set forth in the Merger Agreement (defined below). 

RECITALS 
 WHEREAS, the
Company, SICO Acquisition, LLC, a Delaware limited liability company (“MergerCo”), Smith Investment Company, a Nevada corporation (“SICO”), and Smith Investment Company LLC, a Delaware limited liability company, are
party to that certain Agreement and Plan of Merger, dated as of the date hereof (the “Merger Agreement”), pursuant to which, among other things, SICO will be merged with and into MergerCo (the “Merger”), and the
outstanding shares of common stock, par value $.10 per share, of SICO will be converted in the Merger into the right to receive shares of common stock, par value $1 per share, of the Company (the “Common Stock”) and shares of
Class A common stock, par value $5 per share, of the Company (the “Class A Common Stock”; and, together with the Common Stock, the “Company Common Stock”); 
 WHEREAS, each Stockholder is a stockholder of SICO and will receive shares of Company Common Stock issued as consideration in the Merger; 
 WHEREAS, in considering the Merger, the Company has determined that it is advisable and in the best interests of the Company and its stockholders to
condition its entry into the Merger on, among other things, the Stockholders’ agreement to certain standstill and other obligations set forth in this Agreement with respect to the affairs of the Company and the Company Common Stock; and

 WHEREAS, in order to induce the Company to cause the Merger to be completed, the Stockholders have agreed to the standstill and other
obligations set forth in this Agreement with respect to the affairs of the Company and the Company Common Stock. 
 NOW, THEREFORE, in
consideration of the mutual covenants and agreements set forth in this Agreement, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows: 
 AGREEMENT 
 1.01
Definitions. Except as otherwise provided herein, the following terms have the following meanings for all purposes of this Agreement: 

 (a) “Acquisition Transaction” shall mean any transaction or series of transactions,
directly or indirectly, involving any merger, consolidation, share exchange, business combination, issuance of securities, acquisition of securities, recapitalization, tender offer, exchange offer or other transaction (regardless of whether the
Company is the surviving entity after the consummation of such transaction) in which a Person, directly or indirectly, acquires all or more than 50% of the assets or beneficial ownership of all or more than 50% of any class of stock of the Company;
provided, however, that the term “Acquisition Transaction” shall not include (i) the Merger or any other transactions contemplated by the Merger Agreement, (ii) entry into and performance under the terms of the Voting Trust
Agreement, or (iii) any acquisition of shares of Company Common Stock by a Stockholder (A) from any Existing Class A Holder or from any Permitted Transferee (each as defined in the proposed Amended and Restated Certificate of
Incorporation of the Company, a form of which is appended to the Merger Agreement as Exhibit J), (B) in a “brokers transaction” (within the meaning of Rule 144 under the Securities Act) or (C) in any privately negotiated
transaction that does not otherwise constitute a “tender offer” (within the meaning of Section 14(d) under the Exchange Act). 
 (b) “beneficially owns” (or comparable variations thereof) has the meaning set forth in Rule 13d-3 promulgated under the Exchange Act. 
 (c) “Bylaws” means the Amended and Restated Bylaws of the Company, as the same may be amended and restated from time to time. 
 (d) “Certificate of Incorporation” means the Amended and Restated Certificate of Incorporation of the Company, as the same may be
amended and restated from time to time, and including the amendments thereto contemplated by the Merger Agreement. 
 (e)
“Commission” means the Securities and Exchange Commission. 
 (f) “Controlled Affiliate” means a Person
that, directly or indirectly, through one or more intermediaries, is controlled by a Stockholder. For purposes of this definition, “controlled by”, with respect to any Person, shall mean the possession, directly or indirectly, of the power
to direct or cause the direction of the management and policies of such Person, whether through the ownership of voting securities or by contract or otherwise. 
 (g) “Exchange Act” means the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder. 
 (h) “Governmental Authority” shall mean any government, court, regulatory or administrative agency, commission or authority, securities
exchange (including the NYSE) or other governmental instrumentality, whether federal, state or local, domestic, foreign or multinational. 
 (i) “Person” means any individual, corporation, limited liability company, partnership, trust, other entity or group (within the meaning of Section 13(d)(3) of the Exchange Act). 
  

 2 

 (j) “Proxy Contest” means any “solicitation” of “proxies” (each
within the meaning of Section 14(a) of the Exchange Act) by a Person other than a Stockholder, a Controlled Affiliate thereof, the Company or the Board of Directors of the Company with respect to any matter submitted for (i) consideration
at any annual or special meeting of the stockholders of the Company or (ii) stockholder action by written consent. 
 (k)
“Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder. 
 (l)
“Standstill Termination Date” means the earliest of (i) three years after the Effective Time, (ii) the date on which all of the outstanding Class A Common Stock is automatically converted into Common Stock in
accordance with the Certificate of Incorporation, (iii) the date on which the Company publicly announces that it has entered into a definitive written agreement with respect to an Acquisition Transaction, or (iv) ten business days after a
Person publicly announces an unsolicited offer with respect to an Acquisition Transaction, if prior to such tenth business day the Company has not issued a press release expressly rejecting such Acquisition Transaction. 
 1.02 Standstill Agreement. From and after the Effective Time until the Standstill Termination Date, each Stockholder will not, and will cause its
Controlled Affiliates not to, directly or indirectly, without the prior written approval of the Company’s Board of Directors or any duly constituted committee thereof: 
 (a) Except in response to a Proxy Contest, engage in or knowingly participate in, directly or indirectly, or publicly announce an intention to engage in
or participate in, any “solicitation” of “proxies” (each within the meaning of Section 14(a) of the Exchange Act) from any Person other than a Stockholder with respect to any matter submitted for consideration (including the
election of directors by holders of the Common Stock, voting as a separate class, in accordance with the Certificate of Incorporation) at any annual or special meeting of the stockholders of the Company; provided however, that nothing herein
shall restrict or limit the ability of (i) the holders of Class A Common Stock to solicit proxies or consents solely regarding matters affecting the rights, preferences or privileges of the Class A Common Stock that are exclusive to
the Class A Common Stock and not shared with the holders of Company Common Stock, (ii) the holders of the Class A Common Stock, voting as a separate class or voting with the holders of Common Stock, to elect directors in accordance
with the Certificate of Incorporation, or (iii) the Stockholders to vote their respective shares; 
 (b) Except in response to a Proxy
Contest or otherwise if initiated or not opposed by the Company, initiate, knowingly participate in, or consent to the taking of any stockholder action by consent without a meeting pursuant to Section 228 of the DGCL; provided however, that
nothing herein shall restrict or limit the ability of (i) the holders of Class A Common Stock to solicit consents, or to take action by written consent, solely regarding matters affecting the rights, preferences or privileges of the
Class A Common Stock that are exclusive to the Class A Common Stock and not shared with the holders of Company Common Stock, or (ii) the holders of the Class A Common Stock, voting or acting as a separate class or voting or
acting with the holders of Common Stock, to elect directors in accordance with the Certificate of Incorporation; 
  

 3 

 (c) Submit, otherwise solicit stockholder approval for, or take any action that would result in a public
announcement related to, any proposal for consideration at any annual or special meeting of the stockholders of the Company (including pursuant to Rule 14a-8 under the Exchange Act); 
 (d) Make, effect or commence an Acquisition Transaction, or take any action that would reasonably be expected to result in a public announcement of an
Acquisition Transaction; 
 (e) Enter into any agreements, arrangements or understandings with any other Person with respect to any matter
described in this Section 1.02, including forming, joining or knowingly participating in a “group” (within the meaning of Section 13(d)(3) of the Exchange Act) with respect to the Company or the Company Common Stock; provided,
however, that nothing herein shall limit any Stockholder from forming, joining or participating in a “group” (i) comprised solely of the Stockholders and their respective Controlled Affiliates, (ii) created by entry into and the
conduct of the Voting Trust Agreement, (iii) created as a result of any transaction undertaken for bona fide estate planning purposes, and/or (iv) created as a result of a transaction expressly permitted by this Agreement; or 

(f) Except as provided in the Voting Trust Agreement, directly or indirectly sell, assign, gift, bequeath, appoint or otherwise dispose of any shares
of Class A Common Stock to a Permitted Transferee unless the transferee is a Stockholder or becomes a party to this Agreement by executing a counterpart signature page to this Agreement. 
 The provisions of this Section 1.02 shall not impair or affect in any way the exercise by any Stockholder or any of its Controlled Affiliates of his or her
fiduciary or other duties as a director, officer or employee of the Company in his or her capacity as such, nor shall any action in such capacity constitute a breach of this Agreement. 
 1.03 Stockholder Representations. Each Stockholder, severally and not jointly, hereby represents and warrants to the Company as follows:

 (a) This Agreement has been duly and validly executed and delivered by such Stockholder and constitutes a legally valid and binding
obligation of such Stockholder enforceable against such Stockholder in accordance with its terms, except as enforceability may be limited by bankruptcy, insolvency, reorganization, moratorium or other similar laws affecting the enforcement of
creditors’ rights generally and by general equitable principles (regardless of whether such enforceability is considered in a proceeding in equity or at law). 
 (b) The execution and delivery by such Stockholder of this Agreement do not, and the performance by such Stockholder of such Stockholder’s obligations under this Agreement will not: (i) conflict with or
result in a violation or breach of any term or provision of any law, statute, rule or regulation or any order, judgment or decree of any Governmental Authority applicable to such Stockholder; or (ii) conflict with or result in a violation or
breach of, constitute (with or without notice or lapse of time or both) a default under, or require such Stockholder to obtain any consent, approval or action of, make any filing with or give any notice to any Person as a result or under the terms
of, any contract, permit, license, agreement or arrangement to which such Stockholder is a party or by which such Stockholder may be bound. 
  

 4 

 (c) No consent, approval or action of, filing with or notice to any Governmental Authority on the part of
such Stockholder is required in connection with the execution and delivery of this Agreement, other than any filing with the Commission required in connection with the execution and delivery of this Agreement. 
 1.04 Company Representations. The Company hereby represents and warrants to each Stockholder as follows: 
 (a) The Company is a corporation duly incorporated, validly existing and in good standing under the laws of the State of Delaware. The Company has the
requisite corporate power and authority to execute and deliver this Agreement, to perform its obligations hereunder and to consummate the transactions contemplated hereby. 
 (b) The execution and delivery by the Company of this Agreement, and the performance by the Company of its obligations hereunder, have been duly and
validly authorized by the Board of Directors of the Company, no other corporate action on the part of the Company or its stockholders being necessary. This Agreement has been duly and validly executed and delivered by the Company and constitutes a
legally valid and binding obligation of the Company in accordance with its terms, except as enforceability may be limited by bankruptcy, insolvency, reorganization, moratorium or other similar laws affecting the enforcement of creditors’ rights
generally and by general equitable principles (regardless of whether such enforceability is considered in a proceeding in equity or at law). 
 (c) The execution and delivery by the Company of this Agreement do not, and the performance by the Company of its obligations under this Agreement and the consummation of the transactions contemplated hereby will not (i) conflict with
or result in a violation or breach of any of the terms, conditions or provisions of the Certificate of Incorporation or Bylaws; (ii) conflict with or result in a violation or breach of any term or provision of any law, statute, rule or
regulation or any order, judgment or decree of any Governmental Authority applicable to the Company; or (iii) conflict with or result in a violation or breach of, constitute (with or without notice or lapse of time or both) a default under, or
require the Company to obtain any consent, approval or action of, make any filing with or give any notice to any Person as a result or under the terms of, any contract, permit or license to which the Company is a party. 
 (d) No consent, approval or action of, filing with or notice to any Governmental Authority on the part of the Company is required in connection with the
execution and delivery of this Agreement, other than any filing with the Commission required in connection with the execution and/or delivery of this Agreement. 
 1.05 Failure to Consummate the Merger. This Agreement shall be effective upon the Effective Time. In the event that the Merger Agreement is terminated, this Agreement shall be terminated and be of no force or
effect. 
  

 5 

 1.06 Amendment and Waiver. This Agreement may be amended, supplemented or modified only by a
written instrument duly executed by or on behalf of each party hereto. Any term or condition of this Agreement may be waived at any time by the party that is entitled to the benefit thereof, but no such waiver shall be effective unless set forth in
a written instrument duly executed by or on behalf of the party waiving such term or condition. No waiver by any party of any term or condition of this Agreement, in any one or more instances, shall be deemed to be or construed as a waiver of the
same or any other term or condition of this Agreement on any future occasion. All remedies, either under this Agreement or by law or otherwise afforded, will be cumulative and not alternative. 
 1.07 Notices. All notices and other communications given or made pursuant hereto shall be in writing and shall be deemed to have been duly given
or made as of the date delivered or sent if delivered personally or sent by facsimile or sent by prepaid overnight carrier to the parties at the following addresses (or at such other addresses as shall be specified by the parties by like notice):

 If to any Stockholder, to: 
 The address indicated for each Stockholder on the signature page to this Agreement. 
 with a copy (which shall not constitute
notice) to: 
 Bruce M. Smith 
 Smith Investment Company 
 11270 West Park Place Milwaukee, Wisconsin 53224 
 Facsimile: 414-359-4198 
 with a copy (which
shall not constitute notice) to: 
 Quarles & Brady LLP 
 411 East Wisconsin Avenue, Suite 2040 
 Milwaukee, Wisconsin 53202 
 Facsimile: 414-271-3552 
 Attention: Kenneth V. Hallett 
 with a copy (which shall not constitute notice) to: 
 Latham & Watkins LLP 
 233 South
Wacker Drive, Suite 5800 
 Chicago, Illinois 60606 
 Facsimile: 312-993-9767 
 Attention: Mark D. Gerstein 
  

 6 

 If to the Company, to: 
 A.O. Smith Corporation 
 11270 West Park Place 
 Milwaukee, Wisconsin 53224 
 Facsimile:
414-359-7450 
 Attention: General Counsel 
 with a copy (which shall not constitute notice) to: 
 Winston & Strawn LLP 
 35 West Wacker Drive 
 Chicago, Illinois
60601-9703 
 Facsimile: 312-558-5700 
 Attention: Robert F. Wall 
 1.08 Entire Agreement. This Agreement, and the Merger Agreement and the other agreements
contemplated thereby constitute the entire agreement, and except as explicitly set forth herein, supersedes all prior written agreements, arrangements, communications and understandings and all prior and contemporaneous oral agreements,
arrangements, communications and understandings among the parties with respect to the subject matter of this Agreement. 
 1.09 No Third
Party Beneficiary. This Agreement shall be binding upon and inure solely to the benefit of each of the parties and their respective successors and permitted assigns, and nothing in this Agreement, express or implied, is intended to or shall
confer upon any other Person any legal or equitable right, benefit or remedy of any nature under or by reason of this Agreement. 
 1.10
No Assignment; Binding Effect. Neither this Agreement nor any right, interest or obligation hereunder may be assigned by any parties hereto without the prior written consent of the other party hereto and any attempt to do so will be void.
Subject to the preceding sentence, this Agreement is binding upon, inures to the benefit of and is enforceable by the parties hereto and their respective successors and assigns and legal representatives. 
 1.11 Specific Performance. The parties hereto agree that irreparable damage would occur in the event that any of the provisions of this Agreement
were not performed in accordance with their specific terms or were otherwise breached. It is accordingly agreed that the parties shall be entitled to an injunction or injunctions to prevent breaches of this Agreement and to enforce specifically the
terms and provisions hereof in addition to any other remedy to which they are entitled at law or in equity. 
  

 7 

 1.12 Certain Interpretations. Unless the context otherwise requires, as used in this Agreement:
(a) “or” is not exclusive; (b) “including” and its variants mean “including, without limitation” and its variants; (c) words defined in the singular have the parallel meaning in the plural and vice versa;
(d) references to “written” or “in writing” include in electronic form; (e) the terms “hereof”, “herein”, “hereby”, “hereto”, and derivative or similar words refer to this entire
Agreement; (f) whenever the context may require, any pronoun shall include the corresponding masculine, feminine and neuter forms; (g) the word “will” shall be construed to have the same meaning and effect as the word
“shall”; (h) references to “dollars” or “$” in this Agreement shall mean United States dollars; (i) any definition of or reference to any agreement, instrument or other document herein shall be construed as
referring to such agreement, instrument or other document as from time to time amended, supplemented or otherwise modified (subject to any restrictions on such amendments, supplements or modifications set forth herein); (j) reference to a
particular statute, regulation or law includes all rules and regulations thereunder and any predecessor or successor statute, regulation or law, in each case, as amended or otherwise modified from time to time prior to the date hereof;
(k) whenever this Agreement refers to a number of days, such number shall refer to calendar days unless business days are specified; and (l) the headings used in this Agreement have been inserted for convenience of reference only and do
not define or limit the provisions hereof. 
 1.13 Severability. If any provision of this Agreement or of any other instrument or
writing referred to herein, or the application thereof to any Person or circumstance is held invalid or unenforceable, the remainder of this Agreement, and the application of such provision to other Persons or circumstances, shall not be affected
thereby, and to such end, the provisions of this Agreement are agreed to be severable. 
 1.14 Governing Law. This Agreement shall be
governed by and construed in accordance with the laws of the State of Delaware applicable to a contract executed and performed in such State, without giving effect to the conflicts of laws principles thereof. Each party hereto hereby irrevocably and
unconditionally submits, for itself and its property, to the exclusive jurisdiction of the courts of the State of Delaware and the Federal Courts of Delaware (the “Delaware Courts”), in any suit, action or proceeding arising out of or
relating to this Agreement, or for recognition or enforcement of any judgment resulting from any suit, action or proceeding, and each party hereby irrevocably and unconditionally agrees that all claims in respect to any such suit, action or
proceeding may be heard and determined in a Delaware Court. Each party hereby irrevocably and unconditionally waives, to the fullest extent it may legally and effectively do so, (a) any objection which it may now or hereafter have to the laying
of venue of any suit, action or proceeding arising out of or relating to this Agreement in a Delaware Court, (b) the defense of an inconvenient forum to the maintenance of such suit, action or proceeding in any such court, and (c) the
right to object, with respect to such suit, action or proceeding, that such court does not have jurisdiction over such party. Each party irrevocably consents to service or process in any manner permitted by law. 
 1.15 Counterparts. This Agreement may be executed in two or more counterparts, all of which shall be considered one and the same instrument and
shall become effective when one or more counterparts thereof have been signed by each of the parties and delivered to the other party. 
 1.16 Facsimile Signature. This Agreement may be executed by facsimile signature and a facsimile signature shall constitute an original for all purposes. 
  

 8 

 IN WITNESS WHEREOF, each party hereto has signed this Agreement, or caused this Agreement to be signed on
its behalf, as of the date first above written. 
  

			
	THE COMPANY:
	
	A. O. SMITH CORPORATION
		
	 By:
	 	 /s/ James F. Stern

		 	Name: James F. Stern
		 	 Title: Executive Vice President, General
           Counsel and Secretary

  
 [Stockholder signature
pages to follow.] 

 [continued signature page to Stockholder Agreement dated as of December 9, 2008 by and 
 among A.O. Smith Corporation and the signatories hereto.] 
  

	
	 THE STOCKHOLDERS:

	
	 /s/ Arthur O. Smith

	Arthur O. Smith, individually
	
	 Address:
 740
East Bay Point Road
 Milwaukee, WI 53217-1350

	
	 /s/ Margaret B. Smith

	Margaret B. Smith, individually
	
	 Address:
 740
East Bay Point Road
 Milwaukee, WI 53217-1350

			
	 Arthur O. Smith III Trust dated 12/05/74
 Regina Smith Mallon Trust dated 12/05/74
 Maria L. Smith Trust dated 12/05/74
 Mark D. Smith Trust dated 12/05/74
 Dana K. Smith Trust dated 12/05/74
 Lucy W. Smith Trust u/a dated 12/29/52
 Robert Lewis Smith Family Trust dated
6/28/72
 Sierra Anne Steer Smith 2002 Trust dated 1/13/2003
 Lloyd David Smith 2003 Trust
 June E. Rhea Family Trust dated 1/5/71
 June Ellyn Rhea 1987 Trust
 Robin Rhea Family Trust dated 7/22/76
 June S. Rhea 1971 Revocable Trust f/b/o Lloyd Fay
 June S. Rhea 1971 Revocable
Trust f/b/o June Rhea
 June S. Rhea 1971 Revocable Trust f/b/o Robin Rhea
 June S. Rhea 1970 Trust f/b/o Lloyd Fay
 June S. Rhea 1970 Trust f/b/o June E. Rhea
 Lloyd Johns Fay Trust dated 11/6/74
 June Ellyn Rhea Trust dated 11/6/74
 Robin Rhea Trust dated 11/6/74
 June Rhea 1979 Family Trust f/b/o Lloyd Fay

 June Rhea 1979 Family Trust f/b/o June E. Rhea
 June Rhea 1979
Family Trust f/b/o Robin Robin

		
	 By:
	 	 /s/ Bruce M. Smith

		 	Bruce M. Smith, Trustee
		
		 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

			
	Taylor Benjamin Alt 2001 Trust
	 Jonathon Douglas Alt 2001 Trust
 L.B. Smith 1994 Trust
 Melissa Anne Smith 2003 Trust
 Amelia Paige McEneany Smith Minority Trust 6/24/96
 Amelia Paige McEneany Smith 1996 Trust 12/10/96
 Liam Quinn McEneany Smith 2000 Trust
 Alexandra Marie Smith 1987 Trust dated
11/06/87
 Alexandra Marie Smith Minority 1989 Trust 12/19/89
 Joshua Daniel Smith 1987 Trust dated 9/4/87
 Joshua Daniel Smith 1989 Minority Trust dated 12/19/89
 Katherine Anne Smith 1988 Trust dated 12/23/88
 Katherine Anne Smith 1989
Minority Trust 12/19/89
 Anneliese Victoria Smith 1994 Trust
 Anneliese Victoria Smith 1994 Minority Trust
 Scott Gordon Linzmeyer 1987 Trust dated 3/10/87
 Scott Gordon Linzmeyer 1989 Minority Trust 12/19/89
 Lloyd E. Fay Irrevocable
2003 Trust

		
	 By:
	 	 /s/ Arthur O. Smith

		 	Arthur O. Smith, Trustee
		
		 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

			
	Agnes G. Hummel Trust
		
	 By:
	 	 /s/ Arthur O. Smith

		 	Arthur O. Smith, Trustee
	
	 Address:
 740 E. Bay Point Road
 Milwaukee, WI 53217-1350

	
	Robert Lewis Smith Trust u/a dated 11/12/52
	Roger Scott Smith Trust u/a dated 11/12/52
	Nancy Smith Linzmeyer Trust u/a dated 12/17/57
		
	 By:
	 	 /s/ Bruce M. Smith

		 	Bruce M. Smith, Trustee
		
		 	 /s/ Arthur O. Smith

		 	Arthur O. Smith, Trustee
		
		 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

	
	Bruce M. Smith Trust u/a dated 11/12/52
		
	 By:
	 	 /s/ Robert L. Smith

		 	Robert L. Smith, Trustee
		
		 	 /s/ Arthur O. Smith

		 	Arthur O. Smith, Trustee
		
		 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

			
	Arthur O. Smith Revocable 1976 Trust
		
	 By:
	 	 /s/ Margaret B. Smith

		 	Margaret B. Smith, Trustee
		
		 	 /s/ Bruce M. Smith

		 	Bruce M. Smith, Trustee
		
		 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

	
	Arthur O. Smith III Family Trust dated 12/29/76
	 Mallon Family Trust
 Maria Lauren Smith Family Trust dated 12/27/79
 Mark Dean Smith Family Trust dated 8/12/82
 Dana K. Smith Family Trust dated 12/16/83

		
	 By:
	 	 /s/ Margaret B. Smith

		 	Margaret B. Smith, Trustee
		
		 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

			
	A.O. Smith Family 1973 Trust f/b/o Arthur O. Smith III
	 A.O. Smith Family 1973 Trust f/b/o Maria L. Smith
 A.O. Smith Family 1973 Trust f/b/o Mark D. Smith
 A.O. Smith Family 1973 Trust f/b/o Dana K. Smith
 A.O. Smith Family 1973 Trust f/b/o Tracy Aaron Mallon

		
	 By:
	 	 /s/ Margaret B. Smith

		 	Margaret B. Smith, Trustee
		
		 	 /s/ Arthur O. Smith

		 	Arthur O. Smith, Trustee
	
	 Address:
 740 E. Bay Point Road
 Milwaukee, WI 53217-1350

	
	Bruce M. Smith Family Trust u/a dated 6/01/72
		
	 By:
	 	 /s/ Robert L. Smith

		 	Robert L. Smith, Trustee
		
		 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

			
	Jessica A. Mallon Minority Trust dated 12/27/83
	 Robert A. Mallon Minority Trust dated 12/27/83
 Tracy A. Mallon 1987 Trust dated 4/15/87
 Lindsay Smith 1987 Trust dated 5/22/87
 Megan Elizabeth Smith 1987 Trust dated 12/12/87
 Jennifer Katherine Smith 1994 Trust dated 5/17/94

		
	 By:
	 	 /s/ A. O. Smith III

		 	A. O. Smith III, Trustee
		
		 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

	
	Theresa Marie Banghart 1999 Trust dated 12/06/99
	Rebecca A. Banghart 1999 Trust dated 12/06/99
		
	 By:
	 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
		
		 	 /s/ Elizabeth Smith

		 	Elizabeth Smith, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

			
	Arthur Oliver Smith IV 1999 Trust dated 12/07/99
	 Elizabeth Carter Smith 1999 Trust dated 12/07/99
 Katherine Lee Smith 1999 Trust dated 12/07/99

		
	 By:
	 	 /s/ Mark Dean Smith

		 	Mark Dean Smith, Trustee
		
		 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

	
	Roger Scott Smith Family Trust u/a dated 6/29/72
	Nancy Smith Linzmeyer Family Trust u/a dated 9/27/73
		
	 By:
	 	 /s/ Daniel M. Hess

		 	Daniel M. Hess, Trustee
	
	 Address:
 c/o Daniel M. Hess
 Foley & Lardner LLP
 777 East Wisconsin Avenue
 Milwaukee, WI 53202

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