Celestica says it has been working closely with RIM as the troubled BlackBerry maker assesses its supply chain strategy.
And it says it plans to continue to do so during the transition period.
Celestica did not provide further details, saying those would come when it releases second-quarter results on Friday.
However, the company said that prior to any recoveries, its restructuring charges would not exceed US$35 million.
A spokesman for Waterloo, Ont.,-based Research in Motion was not available to discuss the development.
"We do not normally comment on specific supplier relationships," the company said in an e-mailed statement.
"As we outlined in our Q4 earnings call, we are making changes to our supply chain as part of wider efforts to improve the efficiency and cost effectiveness of RIM's operations to help meet our strategic objectives and to deliver long-term value to our stakeholders," it said.
Celestica, meanwhile, reaffirmed its second-quarter financial guidance provided April 24. The company anticipates revenue to be in the range of US$1.65 billion to US$1.75 billion, with adjusted net earnings of 20 to 26 cents per share.
Toronto-based Celestica supplies original equipment manufacturers in the communications, computer, telecom aerospace, defence and other markets.
On Friday, Celestica shares closed up eight cents at $7.61 on the Toronto Stock Exchange.
In premarket trading on the Nasdaq, RIM shares were down 19 cents, or 1.7 per cent, at $10.70.