National Rifle Association CEO Wayne LaPierre’s compensation rose 55% in 2018, to $2.2 million, and former NRA President Oliver North received $1.38 million as part of a since-disputed contract to host an NRA TV show.

The compensation figures for the NRA officers, reported Friday in the group’s annual Internal Revenue Service filing, come as the gun-rights group is under scrutiny over disclosures about Mr. LaPierre’s expenses and numerous financial dealings between the NRA and its top officials or their relatives.

The...