Exhibit 99.1 FOR IMMEDIATE RELEASE October 25, 2021 (All amounts in U.S. dollars. Per share information based on diluted shares outstanding unless otherwise noted.) CELESTICA ANNOUNCES THIRD QUARTER 2021 FINANCIAL RESULTS TORONTO, Canada - Celestica Inc. (TSX: CLS) (NYSE: CLS), a leader in design, manufacturing and supply chain solutions for the world's most innovative companies, today announced financial results for the quarter ended September 30, 2021 (Q3 2021) . † "Celestica's strong third quarter perfor ...

Celestica Inc. (NYSE:CLS) Q2 2021 Results Earnings Conference Call July 27, 2021 8:00 AM ET Company Participants Craig Oberg - VP of IR & Corporate Development Rob Mionis - President & CEO Mandeep Chawla - CFO Conference Call Participants Thanos Moschopoulos - BMO Capital Markets Ruplu Bhattacharya - Bank of America Todd Coupland - CIBC Rob Young - Canaccord Genuity Paul Steep - Scotia Capital Paul Treiber - RBC Capital Markets Jim Suva - Citigroup Daniel Chan - TD Securities Kurt Swartz - Stifel Operator G ...

Celestica Inc. (NYSE:CLS) Q1 2021 Earnings Conference Call April 29, 2021 8:00 AM ET Company Participants Craig Oberg - VP of IR & Corporate Development Rob Mionis - President & CEO Mandeep Chawla - CFO Conference Call Participants Robert Young - Canaccord Genuity Thanos Moschopoulos - BMO Capital Markets Ruplu Bhattacharya - Bank of America Merrill Lynch Paul Steep - Scotia Capital Paul Treiber - RBC Capital Markets Todd Coupland - CIBC World Markets Jim Suva - Citigroup Matt Sheerin - Stifel Daniel Chan - ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ___________________________________________________________________ FORM 20-F ☐ Registration statement pursuant to Section 12(b) or (g) of the Securities Exchange Act of 1934 or ☒ Annual report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2020 or ☐ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to or ...

Celestica Inc. (NYSE:CLS) Q4 2020 Earnings Conference Call January 27, 2021 8:00 AM ET Company Participants Craig Oberg - Vice President of Investor Relations & Corporate Development Rob Mionis - President & Chief Executive Officer Mandeep Chawla - Chief Financial Officer Conference Call Participants Paul Steep - Scotia Capital Todd Coupland - CIBC World Markets Robert Young - Canaccord Genuity Paul Treiber - RBC Capital Markets Thanos Moschopoulos - BMO Capital Markets Ruplu Bhattacharya - Bank of America ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ___________________________________________________________________ FORM 20-F o Registration statement pursuant to Section 12(b) or (g) of the Securities Exchange Act of 1934 or ý Annual report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2019 or o Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to or ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ___________________________________________________________________ FORM 20-F o Registration statement pursuant to Section 12(b) or (g) of the Securities Exchange Act of 1934 or ý Annual report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2018 or o Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to or ...