Brown Brothers Harriman released its Q3 2025 investor letter for the BBH Select Series – Mid Cap Fund, which decreased by -0.9% compared to the Russell Midcap Index’s 5.3% return. The Fund has decreased by a total return of -1.8% YTD. The third quarter saw a boost in the low-quality rally.

In its third-quarter 2025 investor letter, BBH Select Series – Mid Cap Fund highlighted stocks like Advanced Drainage Systems, Inc. (NYSE: WMS), a manufacturer of thermoplastic corrugated pipes. The one-month return of WMS was -2.42%, with shares gaining 13.05% over the last 52 weeks and closing at $144.80 per share on December 09, 2025.

BBH Select Series – Mid Cap Fund cited Advanced Drainage Systems, Inc. (NYSE: WMS) as one of the largest positive contributors in its third quarter 2025 investor letter. The company was also mentioned as one of billionaire Ken Fisher’s industrial stock picks with huge upside potential.

Advanced Drainage Systems, Inc. (NYSE: WMS) was not among the 30 Most Popular Stocks Among Hedge Funds, with 36 hedge fund portfolios holding the stock at the end of the third quarter. The company saw a 9% revenue increase to $850 million in the second quarter of fiscal 2026. While it has potential as an investment, certain AI stocks may offer greater upside potential.

In another article, Advanced Drainage Systems, Inc. (NYSE: WMS) was covered, along with Madison Small Cap Fund’s views on the company. For more investor letters from hedge funds and leading investors, visit the hedge fund investor letters Q3 2025 page.

Read more at Yahoo Finance: Advanced Drainage Systems (WMS) Soared as Multiple Tailwinds Align