Marvell Technology shares declined 8% to $223.10 in premarket trading on Friday following confirmation of a custom-chip deal with Alphabet's Google. The agreement, secured last week, is projected to generate up to $120 billion in revenue through fiscal 2033, with meaningful contributions expected from fiscal 2029 onward. Marvell raised its revenue forecasts for fiscal 2027 and 2028, and its shares have nearly tripled in value this year.