Affiliated Management Group (AMG, Financial) – Asset management holding company AMG was a top contributor in the quarter after reporting results and a positive outlook well ahead of expectations. CEO Jay Horgen is proving to be a great partner, and we believe it is still early days as AMG’s diversification of asset classes and management styles is becoming better appreciated.
From Mason Hawkins (Trades, Portfolio)' Longleaf Partners Fund fourth-quarter 2022 letter.