The FTSE MIB gained 0.4% to close at 52,809 on Monday, supported by broad-based gains across sectors.
Oil major Eni led the index, climbing 3.9% as oil prices advanced amid heightened uncertainty over the Strait of Hormuz, despite conflicting claims over whether the waterway remained open.
Tenaris followed with a 1.7% gain, while utility stocks also advanced as higher temperatures increase electricity demand for cooling.
Stellantis added 2.6% on reports of stronger growth in North America, its most important market.
Inwit rose 2.2% after a Milan court suspended TIM's withdrawal from their MSA. Financial stocks were also higher, with FinecoBank, Banca Monte dei Paschi di Siena (BMPS) and Mediobanca each gaining more than 1%.
Meanwhile, the defense sector lagged, along with the technology sector after SK Hynix plunged 15% in Seoul amid renewed concerns over excessive valuations of artificial intelligence, with Leonardo (-1.3%), Prysmian (-1.3%) and Avio (-1.2%) leading the declines.