SC 13G

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
_____________________

SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. 25)*

________________________

AIRGAS, INC.
(Name of Issuer)
________________________

COMMON STOCK
(Title of Class of Securities)

009363 10 2
(CUSIP Number)

December 31, 2015
(Date of Event Which Requires Filing of this Statement)
_________________________



Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

¨ Rule 13d-1(b)

¨ Rule 13d-1(c)

ý Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).
(Continued on following page(s))


____________________________________________________________________________________________________



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CUSIP No. 009363 10 2

1. NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

Peter McCausland
_____________________________________________________________________________________
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) ¨ (b) ý
_____________________________________________________________________________________
3. SEC USE ONLY
_____________________________________________________________________________________
4. CITIZENSHIP OR PLACE OF ORGANIZATION
United States
_____________________________________________________________________________________

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH
5. SOLE VOTING POWER
           129,027
6. SHARED VOTING POWER
            6,918,927
7. SOLE DISPOSITIVE POWER
            129,027
8. SHARED DISPOSITIVE POWER
            6,918,927
_____________________________________________________________________________________
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
7,047,954
_____________________________________________________________________________________
10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
¨
_____________________________________________________________________________________
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
9.7%
_____________________________________________________________________________________
12. TYPE OF REPORTING PERSON*
IN










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Item 1(a)
 
Name of Issuer
 
 
 
 
 
Airgas, Inc.
 
 
 
Item 1(b)
 
Address of Issuer’s Principal Executive Offices
 
 
 
 
 
Airgas, Inc.
 
 
Radnor Court
 
 
259 North Radnor‑Chester Road, Suite 100
 
 
Radnor, Pennsylvania 19087-5283
 
 
 
Item 2(a)
 
Name of Person Filing
 
 
 
 
 
Peter McCausland
 
 
 
Item 2(b)
 
Address of Principal Business Office, or, if none, Residence
 
 
 
 
 
Airgas, Inc.
 
 
Radnor Court
 
 
259 North Radnor‑Chester Road, Suite 100
 
 
Radnor, Pennsylvania 19087-5283
 
 
 
Item 2(c)
 
Citizenship
 
 
 
 
 
United States
 
 
 
Item 2(d)
 
Title of Class of Securities
 
 
 
 
 
Common Stock, par value $0.01 per share
 
 
 
Item 2(e)
 
CUSIP Number
 
 
 
 
 
009363 10 2
 
 
 




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Item 3
If This Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b) or (c), Check Whether the Person Filing is a:
 
(a)
___
Broker or dealer registered under Section 15 of the Exchange Act;
 
(b)
___
Bank as defined in Section 3(a)(6) of the Exchange Act;
 
(c)
___
Insurance company as defined in Section 3(a)(19) of the Exchange Act;
 
(d)
___
Investment company registered under Section 8 of the Investment Company Act;
 
(e)
___
An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);
 
(f)
___
An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1) (ii)(F);
 
(g)
___
A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G);
 
(h)
___
A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act;
 
(i)
___
A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act;
 
(j)
___
Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

Item 4
 
Ownership
(a) and (b). Peter McCausland beneficially owned an aggregate of 7,047,954 shares of the issuer’s Common Stock, or approximately 9.7% of the shares outstanding, as of December 31, 2015, of which 61,250 shares were issuable upon the exercise of employee stock options.

(c). Peter McCausland had sole power to vote or to direct the vote, and sole power to dispose or to direct the disposition of, 129,027 shares of the issuer’s Common Stock, of which 61,250 shares were issuable upon the exercise of employee stock options. Mr. McCausland had shared power to vote or to direct the vote, and/or shared power to dispose or to direct the disposition of, 6,918,927 shares of the issuer’s Common Stock, which included 1,289,392 shares held by a charitable foundation (the “Foundation”) of which Mr. McCausland is an officer and a director.

Item 5
 
Ownership of Five Percent or Less of a Class
 
 
 
 
 
Not Applicable

Item 6
 
Ownership of More than Five Percent on Behalf of Another Person
    
No other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the issuer’s shares which are the subject of this Schedule 13G, except that, (i) with respect to 5,629,535 shares, Mrs. McCausland shares with Mr. McCausland the right, and (ii) with respect to 1,289,392 shares, the Foundation has the exclusive right.



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Item 7
 
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company
 
 
 
 
 
Not Applicable

Item 8
 
Identification and Classification of Members of the Group
 
 
 
 
 
Not Applicable

Item 9
 
Notice of Dissolution of Group
 
 
 
 
 
Not Applicable
 
 
 
Item 10
 
Certification
 
 
 
 
 
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under §240.14a-11.






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SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
Date: January 29, 2016



/s/ Peter McCausland    
Peter McCausland







































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McKINLEY C. McADOO
JAMES G. LOGUE
ALAN N. ESCOTT
GLENN S. GITOMER
MARC S. MASER
NANCY D. WEISBERG
STEPHAN K. PAHIDES
BERTRAM WOLFSON
CHRISTOPHER F. WRIGHT
ROBERT A. MASCIOLI
McCAUSLAND KEEN BUCKMAN
Attorneys at Law
Radnor Court, Suite 160
259 North Radnor-Chester Road
Radnor, Pennsylvania 19087-5257
Tel 610-341-1000
FAX 610-341-1099
www.mkbattorneys.com
JOAN AGRAN
JEAN HANNA BICKHART
CHRISTINE A. REUTHER
DIANNE G. MORETZSOHN
BLAKE T. FRITZ
GARTH G. HOYT
ANDREW MAGUIRE
BENJAMIN R. PICKER
MICHAEL B. LUTZ
DAVID J. MARTIN

January 29, 2016
Securities and Exchange Commission
Division of Corporation Finance
100 F Street NE
Washington, DC 20549

Dear Sir or Madam:

Pursuant to the provisions of Regulation S‑T, enclosed please find Amendment No. 25 to Schedule 13G regarding Peter McCausland’s beneficial ownership of the common stock of Airgas, Inc. The filing is being effected by direct transmission to the Commission’s EDGAR system.

Sincerely,
/s/ Michael B. Lutz
Michael B. Lutz


Enclosures

cc:
Peter McCausland
 
Robert H. Young, Jr., Senior Vice President and General Counsel, Airgas, Inc.


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