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SEC FORM 4 SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940 		 
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
TOKICH MICHAEL J
(Last) (First) (Middle)
5960 HEISLEY ROAD
(Street)
MENTOR OH 44060
(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
STERIS CORP [ STE ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
SVP & Chief Financial Officer
3. Date of Earliest Transaction (Month/Day/Year)
05/03/2013
4. If Amendment, Date of Original Filed (Month/Day/Year)
 6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Shares, No Par Value 05/03/2013 M 7,500 A $24.45 30,820 D
Common Shares, No Par Value 05/03/2013 S(1) 7,500 D $41.75 23,320(2) D
Common Shares, No Par Value 2,661 I See Footnote Below.(3)
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option Exercise $24.45 05/03/2013 M 7,500 (4) 06/16/2015 Common Shares, No Par Value 7,500 $0 0 D
Explanation of Responses:
1. These open market sales of a total of 7,500 Common Shares is pursuant to a Rule 10b5-1 Stock Trading Plan entered into by the Reporting Person on February 19, 2013.
2. 15,200 of these Common Shares are restricted. The restrictions on these Common Shares lapse as follows: 4,500 on May 20, 2014, 3,700 on June 1, 2015 and 7,000 on May 31, 2016.
3. Represents 2,715.066 units of the STERIS Corporation 401(k) Plan STERIS Stock Fund which equals 2,661 Common share equivalents as of May 3, 2013.
4. These options became exercisable as follows: 1,875 on May 16, 2006, 1,875 on May 16, 2007, 1,875 on May 16, 2008, and 1,875 on May 16, 2009.
/s/ Dennis P. Patton, Authorized Representative under Power of Attorney 05/07/2013
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
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Securities and Exchange Commission
Washington, D.C. 20549
RE: STERIS Corporation
Commission File No. 0-20165
1933 Act and 1934 Act Filings

Authorized Representatives

Gentlemen:

     The above Company is the issuer of securities registered under Section 12 of the
Securities Exchange Act of 1934. The person signing below confirms, as of the date
appearing opposite his signature, that each of the "Authorized Representatives" named
below is authorized on his behalf to sign such statements (on Form 3, Form 4, Form 5,
Form 144, Schedule 13G, or otherwise) with respect to securities of the Company (the
"Securities"), and to submit to the Securities and Exchange Commission such filings
(including reports, notices, and other statements) with respect to the Securities, as are
required by the Securities Act of 1933 or the Securities Exchange Act of 1934
(collectively, the "Acts"). The person so signing also confirms the authority of each of
the Authorized Representatives to do and perform, on his behalf, any and all acts and
things with respect to the Securities requisite or necessary to assure compliance by the
signing person with the filing requirements of the Acts. The authority confirmed herein
shall remain in effect as to the person signing below until such time as the Commission
shall receive from that person a written communication terminating or modifying the
authority.

Authorized Representatives

Mark D. McGinley
Michael J.Tokich
Ronald E. Snyder
Dennis P Patton
J. Adam Zangerle

Dated:  January 14, 2008			                   By:  /s/ Michael Tokich