They closed down the Little Falls manufacturing plant in 2016, moving the Larson production to Pulaski WI. The Marquis-Larson Boat Group continued to build a full line of Larson Boats including Runabouts, Water Sports and the FX Fishing boats. Hannay's shows three Larson series for 2019.
https://www.hannaysmarine.com/new-models/larson-236Marquis-Larson put Larson up for sale in December of 2018 and Polaris bought the assets in January 2019. Polaris moved the FX manufacturing to Indiana. I'm going to guess that Polaris never manufactured anything but the FX fishing boats before pulling the plug just a year after acquiring the marque.