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Who owns Advanced Drainage Systems (WMS) stock

522 funds reported Advanced Drainage Systems (WMS) shares in their latest 13F filings, worth $11.4B in all. The largest holder is BlackRock ($1.2B). Last quarter 230 funds added to their stakes and 260 cut them.

Largest holders of WMS (13F)Largest holders of WMS (13F)BlackRock$1.2BVanguard Group$1.1BVanguard Portfolio Management LLC$582MVanguard Capital Management LLC$533MState Street$423MFirst Trust Advisors LP$418MUBS AM, a distinct business unit …$368MImpax Asset Management Group$290MBaillie Gifford$288MAmerican Century Companies$257M

Largest holders (13F)

FundSharesValueChangeQuarter
BlackRock7,469,940$1.2Bincrease2026-06-30
Vanguard Group7,410,388$1.1Bdecrease2025-12-31
Vanguard Portfolio Management LLC3,705,538$582Mincrease2026-06-30
Vanguard Capital Management LLC3,397,037$533Mdecrease2026-06-30
State Street2,693,665$423Mincrease2026-06-30
First Trust Advisors LP2,660,753$418Mincrease2026-06-30
UBS AM, a distinct business unit of UBS Asset Management Americas LLC2,346,623$368Mdecrease2026-06-30
Impax Asset Management Group1,845,942$290Mdecrease2026-06-30
Baillie Gifford1,835,297$288Mdecrease2026-06-30
American Century Companies1,634,302$257Mdecrease2026-06-30
Morgan Stanley1,393,836$219Mincrease2026-06-30
Geode Capital Management, LLC1,367,443$215Mincrease2026-06-30
Dimensional Fund Advisors LP1,277,818$201Mincrease2026-06-30
Amundi1,417,887$180Mincrease2026-09-30
Pictet Asset Management Holding SA1,127,974$177Mdecrease2026-06-30

Advanced Drainage Systems' latest quarter

Advanced Drainage Systems, Q2 FY27: revenue $889M (+5% year over year), operating margin 21.9%, net earnings $110M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most WMS stock?

By the latest 13F filings: BlackRock ($1.2B); Vanguard Group ($1.1B); Vanguard Portfolio Management LLC ($582M); Vanguard Capital Management LLC ($533M); State Street ($423M).

What is the short interest in WMS?

3,354,432 shares were sold short at the 2026-10-15 settlement, 12.6% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.