An investigation was launched last year to scrutinise the potential impact of the deal on competition levels among service stations.
Maxol's proposed acquisition of Naas Fuels, which operates seven Circle K-branded stations in the Leinster region, has been approved.
An investigation was launched to scrutinise the potential impact of the deal on competition levels among service stations and its implications for consumers.
However, the CCPC concluded that Maxol will continue to compete with other suppliers in the retail sale of motor fuels and the operation of forecourt convenience stores.
As a result, the CCPC has determined that the proposed acquisition will not substantially lessen competition and can go ahead.
Maxol, a seller of oil and petroleum products, owns a network of 243 Maxol-branded retail motor fuel service stations across Ireland, while Naas Fuels operates seven Circle K-branded stations.

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