warrants in conjunction with its acquisition of solexa , inc . on january 26 , 2007 , the company assumed 4489686 warrants issued by solexa prior to the acquisition . during the year ended december 28 , 2008 , there were 401362 warrants exercised , resulting in cash proceeds to the company of $ 3.0 million . as of december 28 , 2008 , 252164 of the assumed warrants had expired . a summary of all warrants outstanding as of december 28 , 2008 is as follows: .