June 1 (Reuters) - Frankfurt-listed IT services provider Datagroup SE D6HG.DE said on Sunday that KKR KKR.N has made a conditional proposal to increase the potential acquisition offer to up to 58 euros ($65.84) per share.

KKR initially offered 54 euros per share in an all-cash transaction valuing Datagroup at approximately 450 million euros.

Under the revised terms, the offer price will rise to 56.50 euros a share if the bidder secures at least 80% of outstanding shares and if it reaches 90%, the offer will stand at 58 euros per share.

If neither of these thresholds is met, the original offer price will remain unchanged, the statement said, adding that the acceptance period runs until June 6, 2025.

KKR also explicitly ruled out a further increase of the offer price.

Datagroup will delist from the stock exchange once the purchase is settled, with closing expected in the third quarter of 2025.

The IT services provider has about 3,700 employees at locations across Germany and expects revenue to grow to between 545 million euros and 565 million euros in the current year, the company said in March.

($1 = 0.8813 euros)

(Reporting by Bipasha Dey in Bengaluru; Editing by Aurora Ellis)

((Bipasha.Dey@thomsonreuters.com;))