Walter Simmons is the main antagonist of the 2021 crossover film Godzilla vs. Kong and its novelization. He was the powerful CEO of Apex Cybernetics and the father of Maia Simmons. Driven by a need to feed his ambitious ego, Simmons, in the face of the Titans' existence being revealed, sought to be the one to re-establish humanity as the sole "apex" species on Earth with his company on top.