Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN 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 *
Ong Chee Cheong Nicholas
   2. Issuer Name and Ticker or Trading Symbol
OSI SYSTEMS INC [OSIS] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Pres., Spacelabs Healthcare
(Last)
(First)
(Middle)
12525 CHADRON AVE		 3. Date of Earliest Transaction (Month/Day/Year)
12/19/2014
(Street)

HAWTHORNE, CA 90250		 4. If Amendment, Date Original Filed(Month/Day/Year)
 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 Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 12/19/2014   P(1)(3)   1,000 A $ 71.7 79,529 D  
Common Stock 12/19/2014   S   2,000 D $ 71.85 77,529 D  
Common Stock 12/24/2014   S   1,000 D $ 72.2 76,529 D  
Common Stock 06/08/2015   S(1)(3)   3,826 D $ 72.425 72,703 D  
Common Stock 08/07/2015   P(2)(3)   1,000 A $ 67 73,703 D  
Common Stock 09/08/2015   S   1,000 D $ 74.45 72,703 D  
Common Stock 09/17/2015   S   1,000 D $ 78.63 71,703 D  
Common Stock 09/17/2015   M   14,000 A $ 16.72 85,703 D  
Common Stock 09/17/2015   M   8,000 A $ 10.96 93,703 D  
Common Stock 09/17/2015   S(2)(3)   31,710 D $ 78.84 61,993 D  

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Option to Purchase Common Stock $ 16.72 09/17/2015   M     14,000 02/08/2011 02/07/2018 Common Stock 14,000 $ 16.72 30,963 D  
Option to Purchase Common Stock $ 10.96 09/17/2015   M     8,000 11/14/2011 11/13/2018 Common Stock 8,000 $ 10.96 22,963 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Ong Chee Cheong Nicholas
12525 CHADRON AVE
HAWTHORNE, CA 90250		       Pres., Spacelabs Healthcare  

Signatures

 /s/ Nicholas Ong   09/18/2015
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(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 reporting person's purchase of 1,000 shares of OSI Systems, Inc. common stock on December 19, 2014 reported herein was matchable under Section 16(b) of the Securities Exchange Act of 1934 with the reporting person's sale of 1,000 shares of OSI Systems, Inc. common stock at a price of $72.425 on June 8, 2015.
(2) The reporting person's purchase of 1,000 shares of OSI Systems, Inc. common stock on August 7, 2015 reported herein was matchable under Section 16(b) of the Securities Exchange Act of 1934 with the following sales of OSI Systems, Inc. common stock on September 17, 2015: 200 shares at a price of $78.94; 500 shares at a price of $78.96; 200 shares at a price of $79.05; and 100 shares at a price of $79.10.
(3) The reporting person has delivered payment to OSI Systems, Inc. in the amount of $12,713, representing the full amount of the profit realized in connection with the short-swing transactions.

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