Ownership Submission
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 *
  Bigelow Peter Thomas
2. Date of Event Requiring Statement (Month/Day/Year)
04/26/2011
3. Issuer Name and Ticker or Trading Symbol
PATHEON INC [PTI]
(Last)
(First)
(Middle)
4721 EMPEROR BLVD, SUITE 200
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
President North American Opera
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

DURHAM, NC 27703
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)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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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
Employee Stock Option (right to buy)   (1) 03/17/2017 Restricted Voting Shares 200,000 $ 2.56 (2) D  
Employee Stock Option (right to buy)   (3) 03/17/2020 Restricted Voting Shares 120,000 $ 2.56 (4) D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Bigelow Peter Thomas
4721 EMPEROR BLVD
SUITE 200
DURHAM, NC 27703
      President North American Opera  

Signatures

/s/ David S Field, Attorney-in-fact 04/26/2011
**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) The option vests in three equal annual installments on March 17, 2011, March 17, 2012, and March 17, 2013.
(2) The exercise price was converted from C$2.59 using the noon rate of exchange of the Bank of Canada on the date of grant. The actual exercise price will be the Canadian dollar amount regardless of the exchange rate on the date of grant or of exercise.
(3) The option vests in five equal annual installments on March 17, 2011, March 17, 2012, March 17, 2013, March 17, 2014 and March 17, 2015
(4) The exercise price was converted from C$2.59 using the noon rate of exchange of the Bank of Canada on the date of grant. The actual exercise price will be the Canadian dollar amount regardless of the exchange rate on the date of grant or of exercise.
 
Remarks:
Exhibit List
Exhibit 24 - Power of Attorney

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