$3.1 billion gave Ferrero control of WK Kellogg in February, pushing the Italian group deeper into the US food market beyond candy and into breakfast cereal.
More than 50 US brands now sit in Ferrero's portfolio after a decade of acquisitions, including Butterfinger, Baby Ruth, Keebler and Famous Amos.
US revenue has climbed to about $3 billion from roughly $600 million since 2017, and the market now contributes about 15% of Ferrero's global sales versus 4% a decade ago.
More than $5 billion in US investment over five years has funded manufacturing and product development, including a 45,000-square-foot Chicago R&D center and a $75 million Nutella Peanut production line.
WK Kellogg also brings risk because cereal sales were already declining before the takeover, testing Ferrero's strategy of reviving established American brands.