UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

DATE OF REPORT (DATE OF EARLIEST EVENT REPORTED)

September 9, 2016

OSI SYSTEMS, INC.

(EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER)

12525 CHADRON AVENUE

HAWTHORNE, CA 90250

(ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)

(310) 978-0516

(REGISTRANT’S TELEPHONE NUMBER, INCLUDING AREA CODE)

N/A

(FORMER NAME OR FORMER ADDRESS, IF CHANGED SINCE LAST REPORT)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

o                Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o                Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o                Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o                Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Introductory Note

On June 20, 2016, OSI Systems, Inc. (the “Company”) entered into an Agreement and Plan of Merger (the “Merger Agreement”), by and among the Company, Apple Merger Sub, Inc., a newly formed and wholly owned subsidiary of the Company (“Merger Sub”), and American Science and Engineering, Inc., a Massachusetts corporation (“AS&E”), providing for the merger of Merger Sub with and into AS&E (the “Merger”), with AS&E surviving the Merger as a wholly owned subsidiary of the Company. This Current Report on Form 8-K is being filed in connection with the completion on September 9, 2016 (the “Closing Date”) of the transactions contemplated by the Merger Agreement.

Item 2.01                                           Completion of Acquisition or Disposition of Assets

The information provided in the Introductory Note of this Current Report on Form 8-K is incorporated by reference herein.

Pursuant to the terms and conditions set forth in the Merger Agreement, on the Closing Date, the Company acquired AS&E by way of a merger of Merger Sub with and into AS&E, with AS&E surviving the Merger as a wholly owned subsidiary of the Company. Pursuant to the Merger Agreement, and on the terms and subject to the conditions therein, at the effective time of the Merger (the “Effective Time”), each share of common stock of AS&E, par value $0.66 2/3 per share (“AS&E Common Stock”), issued and outstanding immediately prior to the Effective Time, was automatically converted into the right to receive $37.00 in cash, without interest (the “Merger Consideration”), excluding shares owned by the Company or any subsidiary of the Company or AS&E. The aggregate consideration paid by OSI in the Merger was approximately $269 million, excluding related transaction fees and expenses.

Effective as of immediately prior to the Effective Time, each option to purchase shares of AS&E Common Stock vested in full (to the extent unvested) and was automatically cancelled and converted into the right to receive the excess, if any, of the Merger Consideration over the exercise price per share of such option. No such option had an exercise price less than the Merger Consideration. Each AS&E restricted stock award vested in full (to the extent unvested) and was automatically cancelled and converted into the right to receive the Merger Consideration.  Each AS&E restricted cash award was assumed by the Company, and each AS&E restricted stock unit award was assumed by the Company and converted into a new award of restricted stock units covering a number of shares of the Company’s common stock equal to the product of (i) the total number of shares of AS&E’s common stock then underlying such restricted stock unit award multiplied by (ii) the quotient obtained by dividing (x) the Merger Consideration by (y) the average closing sales price for a share of the Company’s common stock on The NASDAQ Global Select Market for the 10 consecutive trading days ending with, and including, the trading day that is two trading days prior to the Closing Date.

The foregoing descriptions of the Merger Agreement and the transactions contemplated thereby do not purport to be complete and are qualified in their entirety by reference to the Merger Agreement, a copy of which was filed as Exhibit 2.1 to the Current Report on Form 8-K filed by the Company with the Securities and Exchange Commission on June 21, 2016 and is incorporated herein by reference.

Item 7.01 Regulation FD Disclosure

On September 12, 2016, the Company issued a press release announcing the closing of the Merger. A copy of that press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. As provided in General Instruction B.2 of Form 8-K, the information in this Item 7.01 and Exhibit 99.1 incorporated herein shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, nor shall they be deemed to be incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, except as shall be expressly set forth by specific reference in such a filing.

Item 9.01 Financial Statements and Exhibits

(a) Financial Statements of Businesses Acquired

The financial statements required by Item 9.01(a) of Form 8-K will be filed by an amendment to this report no later than 71 calendar days after the date this report is required to be filed.

(b) Pro Forma Financial Information

The pro forma financial information required by Item 9.01(b) of Form 8-K will be filed by an amendment to this report no later than 71 calendar days after the date this report is required to be filed.

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(d) Exhibits.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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EXHIBIT INDEX

5

Exhibit 99.1

OSI Systems Completes Acquisition of American Science and Engineering

HAWTHORNE, Calif.—September 12, 2016 - OSI Systems, Inc. (NASDAQ: OSIS) today announced that it has completed its previously announced acquisition of American Science and Engineering, Inc. (“AS&E”), a leading provider of detection solutions for advanced cargo, parcel, and personnel inspection.  OSI Systems acquired all issued and outstanding shares of AS&E for $37.00 per share in cash and assumed certain unvested AS&E equity awards for a total purchase price of approximately $269 million. With this acquisition, OSI Systems’ security offerings now include additional inspection systems based on X-ray backscatter technology, including the Z Backscatter® Van (ZBV®) and the MINI Z® portable backscatter based inspection system.

Deepak Chopra, OSI Systems’ Chairman and Chief Executive Officer, said, “We are pleased to complete our acquisition of AS&E and look forward to continue delivering compelling value and service to our customers worldwide with an expanded portfolio of screening solutions for port, border, aviation and critical infrastructure security.”

About OSI Systems, Inc.

OSI Systems, Inc. is a vertically integrated designer and manufacturer of specialized electronic systems and components for critical applications in the homeland security, healthcare, defense and aerospace industries. It combines more than 30 years of electronics engineering and manufacturing experience with offices and production facilities in more than a dozen countries to implement a strategy of expansion into selective end product markets. For more information on OSI Systems, Inc. or any of its subsidiary companies, visit www.osi-systems.com. News Filter: OSIS-G

Forward-Looking Statements

Certain statements made herein are “forward-looking statements” intended to qualify for the safe harbor from liability established by the Private Securities Litigation Reform Act of 1995. All statements other than historical facts included in this press release, including, but not limited to, the expected benefits of the transaction, prospective performance and future business plans, and any assumptions underlying any of the foregoing, are forward-looking statements. These statements are based on current expectations and projections of future events and reflect beliefs and assumptions that are based on OSI Systems’ perception of historical trends, current conditions and expected future developments as well as other factors management believes are appropriate in the circumstances. If underlying assumptions prove inaccurate or unknown, or unknown risks or uncertainties materialize, actual results could vary materially from OSI Systems’ expectations and projections. Risks and uncertainties include, among other things, that the integration of AS&E’s business into OSI Systems is not as successful as expected; the failure to realize anticipated synergies and cost-savings; the failure of OSI Systems to achieve the expected financial and commercial results from the transaction; other business effects, including effects of industry, economic or political conditions outside either company’s control; transaction costs; actual or contingent liabilities; as well as other cautionary statements contained elsewhere herein and in the reports filed by OSI Systems with the Securities and Exchange Commission, including OSI Systems’ annual report for the year ended June 30, 2016. These forward-looking statements reflect OSI Systems’ expectations and projections as of the date of this press release. OSI Systems undertakes no obligation to update the information provided herein to reflect any change in OSI Systems’ expectations or projections with regard thereto or any change in events, conditions or circumstances on which any such information is based.

For Additional Information, Contact:

OSI Systems, Inc.

Ajay Vashishat

Vice President, Business Development

12525 Chadron Ave

Hawthorne, CA 90250

Tel: (310) 349-2237

avashishat@osi-systems.com