I'll now quote from https://www.snopes.com/fact-check/fascism-corporations-corpo... , which thoroughly rejects that interpretation:
"In other words, corporatism in Mussolini's fascism was not a free-market capitalist system. Far from it. It did not allow for the kind of competition, innovation, market entry, and research and development characteristic of modern capitalism, and it was closely ruled in every way by the state with Mussolini at its head.
Anything that draws a direct link between what are now referred to as corporations (large, powerful private companies operating in a modern free-market capitalist system) and Mussolini's corporatism, is founded on a misunderstanding — most likely caused by the similarity between the words."