Core Insights - The BBH Select Series - Mid Cap Fund experienced a total return decrease of -0.9% in Q3 2025, underperforming the Russell Midcap Index, which returned 5.3% [1] - Year-to-date, the fund's total return is -1.8%, compared to the Index's 10.4% [1] - The third quarter saw a continuation of the low-quality rally that began late last year, gaining momentum throughout 2025 [1] Company Highlights - BJ's Wholesale Club Holdings, Inc. (NYSE:BJ) was highlighted as a key stock in the fund's Q3 2025 investor letter [2] - BJ's Wholesale Club's one-month return was -4.66%, and its shares declined by 9.05% over the past 52 weeks [2] - As of December 10, 2025, BJ's stock closed at $89.61 per share, with a market capitalization of $11.806 billion [2] Investment Actions - The fund initiated new positions in ITT Inc. and BJ's Wholesale Club Holdings, Inc. during Q3 2025 [3] - The fund exited positions in Globant, Bruker, and Bright Horizons Family Solutions Inc. [3]