Moody's Rating Moody's on Friday changed the outlook on Superior Plus (SPB.TO) to stable from rating under review. Also, the rating agency confirmed Ba2 corporate family rating, Ba2-PD probability of default rating, and Ba3 senior unsecured ratings. The speculative grade liquidity rating was changed to SGL-3 from SGL-2. This concluded the review that began on Dec. 22, 2022, and follows the closure of the acquisition of Certarus on May 31, 2023.