Advanced Drainage Systems, Inc. (WMS) Institutional Ownership

Ownership Summary

Advanced Drainage Systems, Inc. (NYSE:WMS) has 522 institutional investors with active 13F positions as of December 2025.

• These investors held 91.3% of outstanding shares in December 2025, down from 94.4% in September 2025.
• They decreased total shares held in Advanced Drainage Systems by -1.98% from the prior quarter, while the number of investors in WMS increased 14.73% year over year.
• During the quarter, 242 of these 522 funds increased positions in WMS, 202 reduced exposure, and 78 held steady.
• The aggregate institutional position in Advanced Drainage Systems amounted to 71.6Mn shares as of December 2025, down by 1.45Mn shares quarter on quarter, and up 2.67Mn shares year over year.
• VANGUARD GROUP INC leads ownership in WMS with 7.41Mn shares as of December 31, 2025, equal to 9.45% of outstanding shares.
• The biggest buyers of Advanced Drainage Systems for the quarter ending December 2025 included NORGES BANK (1.08Mn), Amundi (572.19K), BALYASNY ASSET MANAGEMENT L.P. (411.88K), CITADEL ADVISORS LLC (241.49K), Qube Research & Technologies Ltd (202.88K).
• The biggest sellers of Advanced Drainage Systems for the quarter ending December 2025 included Interval Partners, LP (747.97K), Liontrust Investment Partners LLP (714.25K), Bank Of America Corp /De/ (435.19K), Impax Asset Management Group plc (433.35K), Pictet Asset Management Holding SA (412.9K).
• Advanced Drainage Systems's 10 largest shareholders as of December 2025 include VANGUARD GROUP INC (7.41Mn), BlackRock, Inc. (7.11Mn), UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC (2.56Mn), State Street Corp (2.47Mn), FIRST TRUST ADVISORS LP (2.42Mn), BAILLIE GIFFORD & CO (2.24Mn), Impax Asset Management Group plc (2.07Mn), Morgan Stanley (1.71Mn), Pictet Asset Management Holding SA (1.66Mn), AMERICAN CENTURY COMPANIES INC (1.51Mn) per Business Quant data.