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 *
Carestio Daniel A
  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)
Sr. V. P., Isomedix & Life Sci
(Last)
(First)
(Middle)
C/O 5960 HEISLEY ROAD
3. Date of Earliest Transaction (Month/Day/Year)
10/30/2015
(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 10/30/2015   S(1)   600 D $ 72.15 (2) 22,470 (3) D  
Common Shares, No Par Value 10/30/2015   S(1)   2,800 D $ 73.63 (4) 19,670 (3) D  
Common Shares, No Par Value 10/30/2015   S(1)   2,470 D $ 74.64 (5) 17,200 (3) D  
Common Shares, No Par Value 10/30/2015   S(1)   400 D $ 75.38 (6) 16,800 (3) D  

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

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Carestio Daniel A
C/O 5960 HEISLEY ROAD
MENTOR, OH 44060
      Sr. V. P., Isomedix & Life Sci  

Signatures

 /s/ Dennis P. Patton, Authorized Representative under Power of Attorney   10/30/2015
**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) This transaction involved the open market sale on October 30, 2015 of a total of 6,270 shares, held by the Reporting Person, pursuant to a Rule 10b5-1 Stock Trading Plan entered into by the Reporting Person, effective June 11, 2015.
(2) This represents the average sales price of the 600 shares sold in the open market. The actual three sales prices ranged from $72.00 per share to $72.72 per share. Issuer, upon request by the SEC staff, will provide full information regarding the number of shares sold at each of these three sales prices.
(3) 16,800 of these Common Shares are restricted. The restrictions on these Common Shares lapse as follows: 4,500 on May 31, 2016; 3,300 on May 31, 2017; 4,000 on May 30, 2018; and 5,000 on May 28, 2019.
(4) This represents the average sales price of the 2,800 shares sold in the open market. The actual 26 sales prices ranged from $73.12 per share to $74.11 per share. Issuer, upon request by the SEC staff, will provide full information regarding the number of shares sold at each of these 26 sales prices.
(5) This represents the average sales price of the 2,470 shares sold in the open market. The actual 22 sales prices ranged from $74.21 per share to $74.98 per share. Issuer, upon request by the SEC staff, will provide full information regarding the number of shares sold at each of these 22 sales prices.
(6) This represents the average sales price of the 400 shares sold in the open market. The actual four sales prices ranged from $75.29 per share to $75.42 per share. Issuer, upon request by the SEC staff, will provide full information regarding the number of shares sold at each of these four sales prices.

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