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 *
  Shapiro Brian
 2. Date of Event Requiring Statement (Month/Day/Year)
12/10/2009		 3. Issuer Name and Ticker or Trading Symbol
ACETO CORP [ACET]
(Last)
(First)
(Middle)
ONE HOLLOW LANE, SUITE 201		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Vice President
 5. If Amendment, Date Original Filed(Month/Day/Year)
12/18/2009
(Street)

LAKE SUCCESS, NY 11042		 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)
Common Stock 9,959 (1)
D
 

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
Stock Option - right to buy 12/05/2003 12/05/2012 Common Stock 4,000 $ 4.28 D  
Stock Option - right to buy 12/15/2004 08/05/2013 Common Stock 5,250 $ 8.22 D  
Stock Option - right to buy 09/09/2005 09/09/2014 Common Stock 19,500 $ 10.94 D  
Stock Option - right to buy 12/06/2008 12/06/2017 Common Stock 3,000 $ 8.05 D  
Stock Option - right to buy 12/06/2009 12/04/2018 Common Stock 3,000 $ 8.62 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Shapiro Brian
ONE HOLLOW LANE
SUITE 201
LAKE SUCCESS, NY 11042		       Vice President  

Signatures

Brian Shapiro 12/21/2009
**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) Includes 2,000 shares granted Dec. 6, 2007; and 2,000 shares granted Dec. 4, 2008 both of which vest ratably over three years. A total of 2,002 shares are unvested.

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