This seems pretty significant:
Edison Research announces the Top Podcast Networks in the U.S. for total network reach in Q3 2022, as SXM Media, Spotify, and iHeartRadio take the top three spots, respectively. After falling behind Spotify by a narrow margin in the Q2 report, SXM edges back ahead this time. Each are well out ahead of third place iHeartRadio, which in turn is comfortably head of the fourth spot on the chart, Audioboom. The list ranks the most listened-to podcast networks based on total audience reach from Edison Podcast Metrics.