The strategic purchase serves as a preventive measure against a repeat of the 2017 standoff, when Generali bought into Intesa to thwart a full takeover attempt. Under Italian cross-shareholding regulations, the second company to acquire a stake faces a freeze on its voting rights, a mechanism Messina is keen to avoid triggering again.

"You can make a mistake," Messina told analysts, referencing the past friction. "What you cannot do is repeat it." By establishing this position now, Intesa secures its maneuverability as it integrates its bid for Monte dei Paschi, the primary investor in the insurance firm.