On July 2020, Cairn Energy plc announced the farm-outs of its 35.1% working interest from the C1, C2, C3 and C4 contracts, which correspond to C1, C2, C3 and C4 blocks, respectively. All blocks are in offshore Sandino Basin (Pacific and Pacific Coastal basins) in water depths ranging 200 m to 1,000 m. The updated players are Equinor Nicaragua Holdings BV (Operator) with 85% working interest and the Empresa Nicaraguense del Petroleo (PETRONIC) with 15% working interest.  On 28 May 2015 Statoil was awarded four blocks totaling some 16,000 sq km in the Nicaraguan Pacific. The interest holders in the blocks were Equinor (formerly Statoil) operator with 85% working interest and the Empresa Nicaraguense del Petroleo (PETRONIC) with 15% working interest.     On 17 May 2019, Cairn Energy plc announced signed a farm-in agreement with 35.1% working interest in the C1, C2, C3 and C4 contracts, which correspond to C1, C2, C3 and C4 blocks, respectively. The new working interest breakdown were Equinor (operator) with 49.9% working interest, Cairn Energy with 35.1% working interest and the Empresa Nicaraguense del Petroleo (PETRONIC) with 15% working interest.
(Pacific and Pacific Coastal b.) Cairn Energy plc announced the farm-outs of its 35.1% working interest from the C1, C2, C3 and C4 blocks. The updated players are Equinor Nicaragua Holdings BV (85%, op.) and PETRONIC (15%). 