As filed with the Securities and Exchange Commission on September 1, 2009
Registration No. 333-                    
(Exact name of registrant as specified in its charter)
(State or other jurisdiction of incorporation or organization)
(I.R.S. Employer Identification No.)
259 North Radnor-Chester Road, Suite 100
Radnor, Pennsylvania 19087
(Address of Principal Executive Offices)
(Full Title of the Plan)
Robert H. Young, Jr., Senior Vice President, General Counsel and Secretary
Airgas, Inc.
259 North Radnor-Chester Road
Radnor, Pennsylvania 19087
(610) 687-5253
(Name, address and telephone number, including area code, of agent for service)
Copies to:
Nancy D. Weisberg, Esquire
McCausland Keen & Buckman
Radnor Court, Suite 160
259 North Radnor-Chester Road
Radnor, Pennsylvania 19087-5257
(610) 341-1000
     Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):
Large accelerated filer þ Accelerated filer o 
Non-accelerated filer o
(Do not check if a smaller reporting company)
Smaller reporting company o
Calculation of Registration Fee
                  Proposed maximum     Proposed maximum        
  Title of securities     Amount to be     offering price per     aggregate     Amount of  
  to be registered(1)     registered(2)     unit(3)     offering price(3)     registration fee  
Common Stock, $0.01 par value
      2,600,000       $ 45.67       $ 118,742,000       $ 6,625.80    
(1)   Includes associated rights (the “Rights”) to purchase preferred or common stock. Until the occurrence of certain prescribed events, none of which has occurred, the Rights are not exercisable.
(2)   Pursuant to Rule 416 under the Securities Act of 1933, as amended (the “Securities Act”), this Registration Statement is deemed to include such additional shares as may become issuable pursuant to the anti-dilution provisions of the Airgas, Inc. Amended and Restated 2006 Equity Incentive Plan.
(3)   Estimated solely for the purpose of calculating the registration fee pursuant to Rules 457(h) and 457(c) under the Securities Act based upon the average of the high and low sale prices of the Common Stock on the New York Stock Exchange on August 27, 2009, which was $45.67 per share.



     This Registration Statement on Form S-8 is filed by Airgas, Inc., a Delaware corporation (the “Registrant” or the “Company”), relating to 2,600,000 shares of its common stock, par value $0.01 per share (the “Common Stock”), issuable under the Registrant’s Amended and Restated 2006 Equity Incentive Plan.
     Pursuant to General Instruction E, the contents of Registrant’s Form S-8 Registration Statement, No. 333-137185, filed on September 7, 2006, Registrant’s Form S-8 Registration Statement, No. 333-117965, filed on August 5, 2004, Registrant’s Form S-8 Registration Statement, No. 333-100187, filed on September 30, 2002, and Registrant’s Form S-8 Registration Statement, No. 333-42023, filed on December 11, 1997 are hereby incorporated by reference and made a part of this Registration Statement, except as amended hereby.



Item 3. Incorporation of Documents by Reference.
     The following documents are incorporated by reference in this Registration Statement:
     (a) The Company’s annual report on Form 10-K for the fiscal year ended March 31, 2009, filed pursuant to Section 13(a) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”);
     (b) The Company’s quarterly report on Form 10-Q for the quarter ended June 30, 2009;
     (c) The Company’s current reports on Form 8-K filed since March 31, 2009 (the Company’s fiscal year-end);
     (d) All other reports filed pursuant to Section 13(a) or 15(d) of the Exchange Act since the end of the Company’s fiscal year ended March 31, 2009; and
     (e) The description of the Company’s Common Stock contained in Item 1 of the Company’s Registration Statement on Form 8-A filed under the Exchange Act on December 19, 1986.
     In addition, all documents subsequently filed by the Company pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act, after the date hereof, prior to the filing of a post-effective amendment which indicates that all securities offered herein have been sold or which deregisters all securities then remaining unsold, shall be deemed to be incorporated by reference in this Registration Statement and to be part hereof from the date of filing such documents.
Item 4. Description of Securities.
     Not applicable.
Item 5. Interests of Named Experts and Counsel.
     As of September 1, 2009, certain attorneys with McCausland Keen & Buckman, counsel for the Registrant, beneficially owned 25,221 shares of the Registrant’s Common Stock.



Item 6. Indemnification of Directors and Officers.
     Section 145 of the Delaware General Corporation Law (the “DGCL”) permits the indemnification by a Delaware corporation of its directors, officers, employees, and other agents against expenses (including attorneys’ fees), judgments, fines, and amounts paid in settlement in connection with specified actions, suits or proceedings, whether civil, criminal, administrative, or investigative (other than derivative actions which are by or in the right of the corporation) if they acted in good faith and in a manner they reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe their conduct was illegal. In the case of derivative actions, indemnification only extends to expenses (including attorneys’ fees) incurred in connection with defense or settlement of such an action and requires court approval before there can be any indemnification where the person seeking indemnification has been found liable to the corporation.
     The Company’s Bylaws provide that it will indemnify to the full extent permitted by, and in the manner permissible under, the laws of the State of Delaware any person made, or threatened to be made, a party to an action or proceeding, whether criminal, civil, administrative or investigative, by reason of the fact that he, his testator or intestate is or was a director or officer of the Company or any predecessor of the Company, or served any other enterprise as a director or officer at the request of the Company or any predecessor of the Company. The Company maintains liability insurance on behalf of its officers and directors.
     Section 102(b)(7) of the DGCL permits a corporation, in its certificate of incorporation, to limit or eliminate, subject to certain statutory limitations, the liability of directors to the corporation or its stockholders for monetary damages for breaches of fiduciary duty, except for liability (a) for any breach of the director’s duty of loyalty to the corporation or its stockholders, (b) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (c) for any willful or negligent payment of an unlawful dividend, stock purchase or redemption, or (d) for any transaction from which the director derived an improper personal benefit. The Company’s Certificate of Incorporation provides that the personal liability of the Company’s directors is eliminated to the fullest extent permitted by Section 102(b)(7) of the DGCL.



Item 7. Exemption from Registration Claimed.
     Not applicable.
Item 8. Exhibits.
  4.1 †   Amended and Restated 2006 Equity Incentive Plan. (Incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K dated August 20, 2009).
  5*    Opinion of McCausland Keen & Buckman.
  23.1*    Consent of McCausland Keen & Buckman (included in Exhibit 5).
  23.2*    Consent of KPMG LLP.
  24*    Power of Attorney (see signature page of the Registration Statement).
*   Filed herewith.
  Management contract or arrangement.
Item 9. Undertakings.
     (a) The undersigned Registrant hereby undertakes:
          (1) To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement:
               (i) To include any prospectus required by section 10(a)(3) of the Securities Act;
               (ii) To reflect in the prospectus any facts or events arising after the effective date of the Registration Statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the Registration Statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20% change in the maximum aggregate offering price set forth in the “Calculation of Registration Fee” table in the effective Registration Statement;
               (iii) To include any material information with respect to the plan of distribution not previously disclosed in the Registration Statement or any material change to such information in the Registration Statement;



     Provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) of this section do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the Registrant pursuant to section 13 or section 15(d) of the Exchange Act that are incorporated by reference in this Registration Statement.
          (2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.
          (3) To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.
     (b) The undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the Registrant’s annual report pursuant to section 13(a) or section 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to section 15(d) of the Exchange Act) that is incorporated by reference in the Registration Statement shall be deemed to be a new registration statement relating to the securities offered herein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.
     (c) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.



     Pursuant to the requirements of the Securities Act, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in Delaware County, Pennsylvania, on the 1st day of September, 2009.
  By:   /S/ PETER McCAUSLAND    
    Peter McCausland, Chairman, President and   
    Chief Executive Officer   
    Robert M. McLaughlin, Senior Vice President   
    and Chief Financial Officer
(Principal Financial Officer) 
  By:   /S/ THOMAS M. SMYTH    
    Thomas M. Smyth, Vice President, Controller   
    (Principal Accounting Officer)   



     KNOW ALL MEN BY THESE PRESENTS, that each individual whose signature appears below constitutes and appoints Peter McCausland, Robert H. Young, Jr. and Robert M. McLaughlin, and each of them, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to this Registration Statement, and to file the same, with all exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or their, his or her substitutes or substitute, may lawfully do or cause to be done by virtue hereof.
     Pursuant to the requirements of the Securities Act, this Registration Statement has been signed by the following persons in the capacities and on the dates indicated.
  /S/ PETER McCAUSLAND   Date: September 1, 2009    
  Peter McCausland,        
  Chairman and Director        
  /S/ W. THACHER BROWN   Date: September 1, 2009    
  W. Thacher Brown, Director        
  /S/ JAMES W. HOVEY   Date: September 1, 2009    
  James W. Hovey, Director        
  /S/ RICHARD C. ILL   Date: September 1, 2009    
  Richard C. Ill, Director        
  /S/ JOHN C. VAN RODEN, JR.   Date: September 1, 2009    
  John C. van Roden, Jr., Director        
  /S/ PAULA A. SNEED   Date: September 1, 2009    
  Paula A. Sneed, Director        
  /S/ DAVID M. STOUT   Date: September 1, 2009    
  David M. Stout, Director        
  /S/ LEE M. THOMAS   Date: September 1, 2009    
  Lee M. Thomas, Director        
  /S/ ELLEN C. WOLF   Date: September 1, 2009    
  Ellen C. Wolf, Director        



Exhibit Index
Exhibit No.   Description
  Opinion of McCausland Keen & Buckman
  Consent of McCausland Keen & Buckman (included in Exhibit 5)
  Consent of KPMG LLP
  Power of Attorney (see signature page of the Registration Statement)