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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
Amendment No.: 2*
Name of Issuer: STERIS Corporation
Title of Class of Securities: Common Shares
CUSIP Number: 85915210-0
Date of Event Which Requires Filing of this Statement: 12/31/2005
Check the appropriate box to designate the rule pursuant to which
this Schedule is filed.
[X] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[ ] Rule 13d-1(d)
* The remainder of this cover page shall be filled out for a
reporting person's initial filing on this form with respect to the
subject class of securities, and for any subsequent amendment
containing information which would alter the disclosures provided
in a prior cover page.
The information required in the remainder of this cover page shall
not be deemed to be "filed" for the purpose of Section 18 of the
Securities Exchange Act of 1934 ("Act") or otherwise subject to
the liabilities of that section of the Act but shall be subject to
all other provisions of the Act (however, see the Notes).
CUSIP No.: 85915210-0
1. NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Mac-Per-Wolf Company
EIN #36-3099763
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
a. ___
b. ___
3. SEC USE ONLY
4. CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:
5. SOLE VOTING POWER
67,272
6. SHARED VOTING POWER
-2,920,776-
7. SOLE DISPOSITIVE POWER
67,272
8. SHARED DISPOSITIVE POWER
-2,920,776-
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
PERSON
2,988,048
10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
CERTAIN SHARES
Not applicable
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
4.4%
12. TYPE OF REPORTING PERSON
HC
Item 1.
(a). Name of Issuer: STERIS Corporation ("STERIS")
(b). Address of Issuer's Principal Executive Offices:
5960 Heisley Road
Mentor, OH 44060-1834
Item 2.
(a).-(c). Name, Principal Business Address, and Citizenship of
Persons
Filing:
(1) Mac-Per-Wolf Company
311 S. Wacker Dr., Suite 6000
Chicago, IL 60606
Citizenship: Delaware
(d). Title of Class of Securities: Common Shares
(e). CUSIP Number: 85915210-0
Item 3.
This statement is filed pursuant to Rule 13d-1 (b) and the person
filing, Mac-Per-Wolf Company, is a parent holding company in
accordance with 240.13d-1(b)(1)(ii)(G). See Item 7 for additional
information.
Item 4. Ownership
The information in items 1 and 5 through 11 on the cover page(s)
on Schedule 13G is hereby incorporated by reference.
Perkins, Wolf, McDonnell and Company, LLC furnishes investment
advice to various investment companies registered under Section 8
of the Investment Company Act of 1940 and to individual and
institutional clients (collectively referred to herein as "Managed
Portfolios").
The shared voting and dispositive holdings are held by Perkins,
Wolf, McDonnell and Company, LLC, and such holdings may also be
aggregated within 13g filings submitted by Janus Capital
Management, LLC, a minority owner of Perkins, Wolf, McDonnell and
Company, LLC.
Item 5. Ownership of Five Percent or Less of a Class
The Managed Portfolios, set forth in Item 4 above, have the right
to receive all dividends from, and the proceeds from the sale of,
the securities held in their respective accounts.
This statement is being filed to report the fact that the
reporting persons have ceased to be the beneficial owners of more
than five percent of the class of securities.
Item 6. Ownership of More than Five Percent on Behalf of Another
Person
Not applicable.
Item 7. Identification and Classification of the Subsidiary Which
Acquired the Security Being Reported on by the Parent Holding
Company
The reporting person, Mac-Per-Wolf Company, is filing on behalf of
its two subsidiaries:
1) PWMCO, LLC is a wholly-owned subsidiary of Mac-Per-Wolf
Company and is both a broker dealer registered under Section 15 of
the Act and an investment adviser registered under Section 203 of
the Investment Advisers Act of 1940
2) Perkins, Wolf, McDonnell and Company, LLC is a subsidiary of
Mac-Per-Wolf Company, and is an investment adviser registered
under Section 203 of the Investment Advisers Act of 1940
Item 8. Identification and Classification of Members of the Group
Not applicable.
Item 9. Notice of Dissolution of Group
Not applicable.
Item 10. Certification
By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were acquired in the
ordinary course of business and were not acquired for the purpose
of and do not have the effect of changing or influencing the
control of the issuer of such securities and were not acquired in
connection with or as a participant in any transaction having such
purposes or effect.
SIGNATURES
After reasonable inquiry and to the best of my knowledge and
belief, I certify that the information set forth in this statement
is true, complete and correct.
Mac-Per-Wolf Company
By /s/ Gregory E. Wolf 2/1/2006
Gregory E. Wolf, Date
Treasurer