** Brokerage Seaport Research Partners downgrades satellite-radio broadcaster SiriusXM's shares to "neutral" from "buy" ** Company on Tuesday forecast 2025 revenue below estimates and named former ADT executive Wayne Thorsen to newly created role of COO, effective Dec. 16

** Brokerage says based on revenue forecast update, cost shifts to newer product offerings and away from streamer marketing will still have negative margin effect

** Thorsen effectively replaces Chief Product & Technology Officer Joseph Inzerillo, based on his experience from ADT, Google, and with SiriusXM as a client - brokerage

** Brokerage says they are disappointed by delayed EBITDA and FCF growth vs expectations

** 3 of 14 brokerages rate the stock "buy" or higher, 5 "hold" and 6 "sell" or lower; median PT $28 - LSEG

** As of Tuesday's close, stock down ~54% YTD

(Reporting by Neil J Kanatt in Bengaluru) ((Neil.JKanatt@thomsonreuters.com))