SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. 13)*
AIRGAS, INC.
______________________________________________
(Name of Issuer)
COMMON STOCK
_____________________________________________
(Title of Class of Securities)
009363 10 2
__________________________
(CUSIP Number)
December 31, 2003
_______________________________________________________
(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)
[X] 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))
Page 1 of 6 pages
CUSIP No. 009363 10 2 13G Page 2 of 6 pages
___________ __ __
______________________________________________________________________________
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) [X]
______________________________________________________________________________
3. SEC USE ONLY
______________________________________________________________________________
4. CITIZENSHIP OR PLACE OF ORGANIZATION
United States
______________________________________________________________________________
5. SOLE VOTING POWER
725,925
__________________________________________________________
NUMBER OF 6. SHARED VOTING POWER
SHARES
BENEFICIALLY 10,225,937
OWNED BY
EACH __________________________________________________________
REPORTING 7. SOLE DISPOSITIVE POWER
PERSON
WITH 725,925
__________________________________________________________
8. SHARED DISPOSITIVE POWER
10,225,937
______________________________________________________________________________
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
10,951,862
______________________________________________________________________________
10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
[ ]
______________________________________________________________________________
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
14.8%
______________________________________________________________________________
12. TYPE OF REPORTING PERSON*
IN
______________________________________________________________________________
CUSIP No. 009363 10 2 13G Page 3 of 6 pages
___________ __ __
______________________________________________________________________________
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 $.01 per share
Item 2(e) CUSIP Number
____________
009363 10 2
CUSIP No. 009363 10 2 13G Page 4 of 6 pages
____________ __ __
______________________________________________________________________________
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 10,951,862 shares of the issuer's Common Stock, or
approximately 14.8% of the shares outstanding, as of December 31,
2003, of which 1,068,750 shares were issuable upon 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, 725,925 shares of the issuer's Common Stock, of
which 670,486 shares were issuable upon 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, 10,225,937 shares of the Common Stock, which
included 398,264 shares issuable upon exercise of stock options
held by a trust for Mr. McCausland's children, and 4,079 shares
held by a charitable foundation (the "Foundation") of which Mr.
McCausland is an officer and director.
CUSIP No. 009363 10 2 13G Page 5 of 6 pages
___________ __ __
______________________________________________________________________________
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, with respect to
10,221,858 shares, members of Mr. McCausland's family share with
Mr. McCausland the right, and, with respect to 4,079 shares, the
Foundation has the exclusive right, to receive the dividends from
and the proceeds of sale as to such shares.
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
_____________
Not Applicable
CUSIP No. 009363 10 2 13G Page 6 of 6 pages
___________ __ __
______________________________________________________________________________
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.
February 10, 2004
__________________________________
Date
/S/Peter McCausland
__________________________________
Signature
Peter McCausland
__________________________________
Name