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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
815065	Steris Corp	STE	Orthopedic, Prosthetic & Surgical Appliances & Supplies (3842)	341482024

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1236375	L William Aamoth	5960 Heisley Road Mentor OH 44060	V P - Corporate Treasurer	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Shares, No Par Value	Disposition	2012-08-03	2,672	$32.25	8,027	No	4	S	Direct
Common Shares, No Par Value	Disposition	2012-08-03	701	$32.28	0	No	4	W	Indirect	See Footnote Below.

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct
No	4	W	Indirect	See Footnote Below.

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Shares, No Par Value	500	Indirect	See Footnote Below.
Common Shares, No Par Value	635	Indirect	See Footnote Below.

Footnotes

5,280 of these Common Shares are restricted. The restrictions on these Common Shares lapse as follows: 2,680 on May 20, 2014, 500 on May 31, 2013, 500 on June 2, 2014, 500 on June 1, 2015, 275 on May 30, 2013, 275 on May 30, 2014, 275 on June 1, 2015 and 275 on May 31, 2016.
On July 6, 2012, the Reporting Person and his brother agreed to become co-trustees of this family trust of which they are co-beneficiaries. The Reporting Person disclaims beneficial ownership of these securities, except to the extent of his pecuniary interest therein. On August 3, 2012 the family trust sold in the open market the STERIS Common Shares held by the family trust.
Represents an investment by Mr. Aamoth in his Vanguard William L. Aamoth - Rollover IRA Brokerage Account.
Represents 648.151 units of the STERIS Corporation 401(k) Plan STERIS Stock Fund which equals 635 Common share equivalents as of August 3, 2012.