Meanwhile on Monday a different French firm agreed a deal to buy a company in the Republic of Ireland which also has data centre expertise.
Bureau Veritas said it would pay €375m (£327m) for LotusWorks which is based in Sligo.
LotusWorks specialises in the final testing and optimising of data centres before they are switched on and then looks after their ongoing maintenance.
The deal will mean a significant payday for the management team which has controlled the business since 2018.
But these deals are not the biggest data centre fortunes which have been made in Ireland in recent years.
In 2025 Cork-based Dornan Group was sold to the US construction services firm Turner for a reported €400m (£349m).
In 2024 the global investment company Blackstone bought a majority stake in Dublin-based Winthorp Technologies.
Both deals were worth tens of millions of euros to the companies founders and senior managers.
However, the most lucrative deal of them all concerns Philip O’Doherty.
In 2021 he sold his Donegal-based firm E&I Engineering to the US company Vertiv Holdings.
The value of that deal was reported as being worth £1.45bn in cash and shares, with about 80% of that going to O’Doherty and the rest to smaller shareholders.
The most important aspect of that deal has turned out to be the Vertiv shares that O’Doherty received.
The deal was done before the AI boom had really begun so each Vertiv share was then worth around $25.
Today Vertiv’s share price is around $250.
Since April 2024, O’Doherty has gradually been selling his Vertiv shares.
His most recent sale in March this year generated about £298m, bringing total proceeds from shares to about £950m.
He continues to hold Vertiv shares worth just under £1bn.
On top of that the cash portion of the deal was worth about£700m.
Altogether the total value of the deal has turned out at about £2.5bn making him the most successful Irish industrialist of his generation.