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 *   Van Els Jan 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) Managing Director 5. If Amendment, Date Original Filed(Month/Day/Year) (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 1,064 D Â

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	09/09/2005	09/09/2014	Common Stock	9,000	$ 10.94	D	Â
Stock Option - right to buy	12/06/2008	12/06/2017	Common Stock	2,000	$ 8.05	D	Â
Stock Option - right to buy	12/06/2009	12/04/2018	Common Stock	3,000	$ 8.62	D	Â
Restricted Stock Units	  (1)	  (1)	Common Stock	424	$ (1)	D	Â
Restricted Stock Units	  (2)	  (2)	Common Stock	1,366	$ (2)	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Van Els Jan ONE HOLLOW LANE SUITE 201 LAKE SUCCESS, NY 11042	Â	Â	  Managing Director	Â

Signatures

Jan van Eis		12/18/2009
**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)	1,200 Restricted Stock Units (RSU) were granted on 12/6/2007 and vest 1/3 each year beginning on 12/6/2008. Each RSU also accrues dividend equivalents. Each unit represents the right to receive one share of common stock.
(2)	2,000 Restricted Stock Units (RSU) were granted on 12/4/2008 and vest 1/3 each year beginning on 12/4/2008. Each RSU also accrues divident equivalents. Each unit represents the right to receive one share of common stock.

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