Gustavo Denegri Net Worth

Gustavo Denegri has an estimated net worth of $2.6 billion, according to Forbes Real-Time Billionaires, Gustavo Denegri profile (figures as of October 20, 2026). That is down from a peak of $5.1 billion.

Gustavo Denegri is an Italian businessman and the chairman of DiaSorin, a diagnostics company based in Italy. The bulk of his fortune is a stake of about 45% in the publicly traded company, held through IP Investimenti e Partecipazioni, a holding company controlled by his family. He was born in March 1937.

Denegri trained as a chemist and holds a bachelor's degree in chemistry from the University of Turin. He is married with two children and lives in Turin.

Forbes notes that he is one of the few Italian businessmen to have built billion-dollar companies in more than one sector: first in industrial components and then in medical diagnostics. His family investment firm, run by his son Michele, now has a diverse portfolio that includes medical technology, real estate and TV production. Through that holding company, control of his main investments has stayed in family hands.

How Gustavo Denegri made his money

His first breakthrough came through Gruppo Pro-Ind, a components company he built. It merged with Piaggio, the maker of Vespa and Aprilia motor scooters, giving him a major stake in one of Italy's most famous industrial brands. Turning a parts supplier into a partner of a household name showed the deal-making skills he would later use in a very different industry.

His second act came in 2000, when his private equity firm bought DiaSorin, then a distressed business, from American Standard Companies. Denegri and his team built it into a global player in diagnostics, making tests that laboratories and hospitals use to detect diseases. DiaSorin is listed on the stock market, and his family has kept its large stake, so his net worth rises and falls with the company's share price.

How Forbes has valued Gustavo Denegri

Forbes put Denegri's net worth at $2.6 billion in 2019 and $3.1 billion in 2020. His figure rose to $5.1 billion in 2021, his peak.

It then eased to $3.7 billion in 2022, $3.2 billion in 2023 and $3 billion in both 2024 and 2025. On the 2026 World's Billionaires List he was at $2.5 billion, and as of October 20, 2026, the Forbes real-time billionaires tracker showed $2.6 billion. His figure has drifted lower since 2021, though the DiaSorin stake still keeps him among Italy's billionaires. His long record on the list, through very different markets, shows how durable a fortune built in two industries can be.