SEC Form 3

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 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response: 0.5

1. Name and Address of Reporting Person* Ong Chee Cheong Nicholas (Last) (First) (Middle) 12525 CHADRON AVE (Street) HAWTHORNE CA 90250 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 12/12/2014	3. Issuer Name and Ticker or Trading Symbol OSI SYSTEMS INC [ OSIS ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) Pres, Spacelabs Healthcare	5. If Amendment, Date of Original Filed (Month/Day/Year) 12/12/2014
			6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

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	73,796	D

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: 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)	11/13/2018	Common Stock	8,000	10.96	D
Employee Stock Option (right to buy)	(2)	02/07/2018	Common Stock	14,000	16.72	D
Employee Stock Option (right to buy)	(3)	12/21/2020	Common Stock	2,963	36.45	D
Employee Stock Option (right to buy)	(4)	09/08/2021	Common Stock	16,000	33.62	D
Employee Stock Option (right to buy)	(5)	02/09/2022	Common Stock	4,000	52.64	D

Explanation of Responses:

1. The Option became exercisable in three equal annual installments begining on November 14, 2009

2. The Option became exercisable in three equal annual installments begining on February 8, 2009

3. The Option became exercisable in three equal annual installments begining on December 22, 2011

4. The Option became exercisable in three equal annual installments begining on September 9, 2012

5. The Option became exercisable in three equal annual installments begining on February 10, 2013

	/s/ Chee Cheong Nicholas Ong	01/06/2015
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.