FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF 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. Date of Event Requiring Statement (Month/Day/Year) 07/26/2012 3. Issuer Name and Ticker or Trading Symbol STERIS CORP [STE] (Last) (First) (Middle) 5960 HEISLEY ROAD 4. 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 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) MENTOR, OH 44060 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 Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Shares, No Par Value 4,844 (1) D   Common Shares, No Par Value 654 I See Footnote Below. (2)

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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Option to Purchase Common Shares	  (3)	05/21/2019	Common Shares, No Par Value	1,700	$ 22.83	D	Â
Option to Purchase Common Shares	  (4)	05/20/2020	Common Shares, No Par Value	700	$ 31.87	D	Â
Option to Purchase Common Shares	  (5)	05/31/2021	Common Shares, No Par Value	650	$ 36.09	D	Â
Option to Purchase Common Shares	  (6)	05/30/2022	Common Shares, No Par Value	3,500	$ 29.94	D	Â

Reporting Owners

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

Signatures

/s/ Dennis P. Patton, Authorized Representative under Power of Attorney		08/02/2012
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(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)	4,525 of these Common Shares are restricted. The restrictions on these Common Shares lapse as follows: 875 on May 20, 2014, 350 on May 31, 2013, 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, 562 on May 30, 2013, 563 on May 30, 2014, 562 on June 1, 2015 and 563 on May 31, 2016.
(2)	Represents 667.193 units of the STERIS Corporation 401(k) Plan STERIS Stock Fund which equals 654 Common share equivalents as of July 26, 2012.
(3)	These options became or will become exercisable as follows: 425 on May 21, 2010, 425 on May 21, 2011, 425 on May 21, 2012 and 425 on May 21, 2013.
(4)	These options became or will become exercisable as follows: 175 on May 20, 2011, 175 on May 20, 2012, 175 on May 20, 2013 and 175 on May 20, 2014.
(5)	These options became or will become exercisable as follows: 163 on May 31, 2012, 162 on May 31, 2013, 163 on May 31, 2014 and 162 on May 31, 2015.
(6)	These options become exercisable as follows: 875 on May 30, 2013, 875 on May 30, 2014, 875 on May 30, 2015 and 875 on May 30, 2016.

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