Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Forsythe Suzanne V
   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)
V. P. - Human Resources
(Last)
(First)
(Middle)
5960 HEISLEY ROAD		 3. Date of Earliest Transaction (Month/Day/Year)
05/30/2013
(Street)

MENTOR, OH 44060		 4. If Amendment, Date 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
(City)
(State)
(Zip)
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 05/30/2013   F   202 (1) D $ 45.87 4,642 D  
Common Shares, No Par Value 05/31/2013   F   112 (2) D $ 45.34 4,530 D  
Common Shares, No Par Value 05/31/2013   A   4,000 A $ 0 8,530 (3) D  
Common Shares, No Par Value               766 I See Footnote Below. (4)

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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 Underlying Securities
(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 of Derivative Security: 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
Option to Purchase Common Shares $ 45.34 05/31/2013   A   4,000     (5) 05/31/2023 Common Shares, No Par Value 4,000 $ 0 4,000 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Forsythe Suzanne V
5960 HEISLEY ROAD
MENTOR, OH 44060		       V. P. - Human Resources  

Signatures

 /s/ Dennis P. Patton, Authorized Representative under Power of Attorney   06/03/2013
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) 202 shares were withheld from the 562 restricted shares that vested on May 30, 2013. These 202 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These 562 shares were awarded to Ms. Forsythe on May 30, 2012 as part of an award of 2,250 restricted shares. These vested shares were valued at the NYSE closing market price on May 30, 2013.
(2) 112 shares were withheld from the 350 restricted shares that vested on May 31, 2013. These 112 shares represent the value of the taxes required to be withheld pursuant to applicable employment or tax laws, as determined by the Issuer. These 350 shares were awarded to Ms. Forsythe on May 31, 2011 as part of an award of 700 restricted shares. These vested shares were valued at the NYSE closing market price on May 31, 2013.
(3) 7,613 of these Common Shares are restricted. The restrictions on these Common Shares lapse as follows: 875 on May 20, 2014, 175 on June 2, 2014, 175 on June 1, 2015, 350 on August 12, 2013, 175 on August 11, 2014, 175 on August 11, 2015, 563 on May 30, 2014, 562 on June 1, 2015, 563 on May 31, 2016, 1,000 on June 2, 2014, 1,000 on June 1, 2015, 1,000 on May 31, 2016 and 1,000 on May 31, 2017.
(4) Represents 782.369 units of the STERIS Corporation 401(k) Plan STERIS Stock Fund which equals 766 Common share equivalents as of May 31, 2013.
(5) These options become exercisable as follows: 1,000 on May 31, 2014, 1,000 on May 31, 2015, 1,000 on May 31, 2016 and 1,000 on May 31, 2017.

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