FORM 6-K

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16

under the Securities Exchange Act of 1934

For the month of January, 2018

001-14832

(Commission File Number)

CELESTICA INC.

(Translation of registrant’s name into English)

844 Don Mills Road

Toronto, Ontario

Canada M3C 1V7

(416) 448-5800

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Indicate by check mark whether the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): o

Indicate by check mark whether the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): o

Furnished Herewith (and incorporated by reference herein)

The information contained in Exhibit 99.1 of this Form 6-K is not incorporated by reference into any registration statement (or into any prospectus that forms a part thereof) filed by Celestica Inc. with the Securities and Exchange Commission.

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SIGNATURES

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

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EXHIBIT INDEX

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Exhibit 99.1

Celestica Announces 2018 Annual General Shareholders’ Meeting

TORONTO, Canada - Celestica Inc. (NYSE, TSX: CLS), a leader in design, manufacturing and supply chain solutions for the world’s most innovative companies, today announced that its Annual General Shareholders’ Meeting will be held on Friday, April 27, 2018 at 9:30 a.m. EDT at One King West Hotel, 1 King Street West Toronto, Ontario.

Celestica also announced that it has set Friday, March 9, 2018 as the record date for determining shareholders of the company who are entitled to receive notice of, and to vote at, the meeting. Shareholders should expect to receive the company’s proxy statement and related materials in late March.

About Celestica

Celestica enables the world’s best brands. Through our recognized customer-centric approach, we partner with leading companies in aerospace and defense, communications, enterprise, healthtech, industrial, semiconductor capital equipment, and smart energy to deliver solutions for their most complex challenges. A leader in design, manufacturing, hardware platform and supply chain solutions, Celestica brings global expertise and insight at every stage of product development - from the drawing board to full-scale production and after-market services. With talented teams across North America, Europe and Asia, we imagine, develop and deliver a better future with our customers.

For further information on Celestica, visit www.celestica.com.

Company’s securities filings can be accessed at www.sedar.com and www.sec.gov.