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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1. Name and Address of Reporting Person * Rosebrough Walter M Jr   2. Issuer Name and Ticker or Trading Symbol STERIS CORP [STE] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President & CEO (Last) (First) (Middle) C/O 5960 HEISLEY ROAD 3. Date of Earliest Transaction (Month/Day/Year) 08/10/2015 (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 08/10/2015   M   21,250 A $ 36.09 187,720 D   Common Shares, No Par Value 08/10/2015   F   16,012 D $ 67.98 (1) 171,708 D   Common Shares, No Par Value 08/10/2015   M   18,000 A $ 29.94 189,708 D   Common Shares, No Par Value 08/10/2015   F   12,707 D $ 67.98 (1) 177,001 D   Common Shares, No Par Value 08/10/2015   M   25,000 A $ 45.34 201,001 D   Common Shares, No Par Value 08/10/2015   F   20,625 D $ 67.98 (1) 181,376 (2) D   Common Shares, No Par Value               45,460 I See Footnote Below. (3) Common Shares, No Par Value               30,000 I See Footnote Below. (4) Common Shares, No Par Value               4,540 I See Footnote Below. (5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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

Employee Stock Option (right to buy)

$ 36.09

08/10/2015

M

21,250

(6)

05/31/2021

Common Shares, No Par Value

21,250

$ 0

0

D

Employee Stock Option (right to buy)

$ 29.94

08/10/2015

M

18,000

(7)

05/30/2022

Common Shares, No Par Value

18,000

$ 0

18,000

D

Employee Stock Option (right to buy)

$ 45.34

08/10/2015

M

25,000

(8)

05/31/2023

Common Shares, No Par Value

25,000

$ 0

50,000

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Rosebrough Walter M Jr C/O 5960 HEISLEY ROAD MENTOR, OH 44060	X		President & CEO

Signatures

/s/ Dennis P. Patton, Authorized Representative under Power of Attorney		08/11/2015
**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)	Closing market price on the NYSE on the day on which the cashless stock option transaction occurred.
(2)	These 181,376 Common Shares are held by the Reporting Person as Trustee of a revocable trust established for his benefit. 44,750 of these Common Shares are restricted. The restrictions on the restricted Common Shares lapse as follows: 5,000 on May 31, 2016; 6,250 on May 31, 2016; 6,250 on May 31, 2017; 4,250 on May 30, 2016; 4,250 on May 30, 2017, 4,250 on May 30, 2018, 3,625 on May 30, 2016, 3,625 on May 29, 2017, 3,625 on May 28, 2018, and 3,625 on May 28, 2019.
(3)	These shares are held by the Reporting Person's Spouse as Trustee of a revocable trust established for her benefit.
(4)	These shares are held by the Reporting Person as Trustee of an irrevocable trust established for the benefit of the children of the Reporting Person and the Reporting Person's Spouse.
(5)	These shares are held by the Reporting Person as Trustee of an irrevocable trust established for the benefit of the grandchildren of the Reporting Person and the Reporting Person's Spouse.
(6)	These options became exercisable as follows: 21,250 on May 31, 2015.
(7)	These options became exercisable as follows: 18,000 on May 30, 2015.
(8)	These options became exercisable as follows: 25,000 on May 31, 2015.

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