ADVANCED DRAIN SYS INC DEL

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WMS·00790R104·US·Common Stock·Industrials - Building Products & Equipment-13D/G

WMS (ADVANCED DRAIN SYS INC DEL) is held by 219 institutional investors as of Q2 2026. Largest holders: BlackRock, Inc. ($1.2B), VANGUARD PORTFOLIO MANAGEMENT LLC ($581.6M), VANGUARD CAPITAL MANAGEMENT LLC ($533.2M). Net institutional sentiment: Mixed.

219

Holders

(17 Elite)

$9.3B

Total Value

41% (230)

Consensus

95 buying - 135 selling

13F: Jun 30, 2026Insider & Congress: Updated regularly

Smart Money Verdict

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Institutional (13F)68

Insider (Form 4)75

Activist (13D/13G)85

Congressional (STOCK Act)64

Holder Quality

76

★★★★★

Elite

18

★★★★

Strong

84

★★★

Solid

42

★★

Below

19

★

Weak

Held by 219 funds

17 elite

Who's Trading

Source dates: Price Aug 31, 2026 · Insiders Dec 5, 2025 · Activists Apr 29, 2026 · Congress none

ActivistVAVanguard Capital Management5.1%Apr 29, 2026

ActivistThe Vanguard Group0.0%Mar 26, 2026

ActivistADAdvanced Drainage Systems Inc. Employee Stock Ownership Plan Trust6.0%Feb 13, 2026

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Top Holders

Top Holders (219)History

AllNewIncreasedHeldDecreasedExited

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Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
BlackRock, Inc.	Increased	7.5M(+0.6%)	$1.2B	0.0%	+17.32%	32
VPVANGUARD PORTFOLIO MANAGEMENT LLC	Increased	3.7M(+2.5%)	$581.6M	0.0%	-15.48%	32
VAVANGUARD CAPITAL MANAGEMENT LLC	Decreased	3.4M(-0.8%)	$533.2M	0.0%	-15.55%	0
STATE STREET CORP	Increased	2.7M(+8.2%)	$422.8M	0.0%	-3.24%	34
FIRST TRUST ADVISORS LP	Increased	2.7M(+30.2%)	$417.6M	0.2%	+7.76%	47
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	Decreased	2.3M(-4.2%)	$368.3M	0.1%	+36.49%	0
Impax Asset Management Group plc	Decreased	1.8M(-4.2%)	$289.7M	1.9%	+87.47%	0
BAILLIE GIFFORD & CO	Decreased	1.8M(-10.4%)	$288.1M	0.3%	+49.95%	0
AMERICAN CENTURY COMPANIES INC	Decreased	1.6M(-1.4%)	$256.5M	0.1%	+17.17%	0
MORGAN STANLEY	Increased	1.4M(+4.5%)	$218.8M	0.0%	-5.24%	32
GEODE CAPITAL MANAGEMENT, LLC	Increased	1.4M(+1.7%)	$214.7M	0.0%	+53.27%	31
Amundi	Increased	1.4M(+5.1%)	$212.7M	0.1%	+6.08%	32
DIMENSIONAL FUND ADVISORS LP	Increased	1.3M(+7.2%)	$200.5M	0.0%	+25.73%	33
Pictet Asset Management Holding SA	Decreased	1.1M(-48.8%)	$177M	0.2%	-3.48%	0
KAKAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC	Decreased	1M(-6.4%)	$162.5M	0.5%	+15.89%	0
WELLINGTON MANAGEMENT GROUP LLP	Decreased	840,488(-20.9%)	$131.9M	0.0%	+4.63%	0
Qube Research & Technologies Ltd	Increased	839,820(+53.7%)	$131.8M	0.1%	-12.28%	51
Invesco Ltd.	Decreased	835,672(-14.9%)	$131.2M	0.0%	+25.32%	0
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	Decreased	696,500(-0.9%)	$109.3M	0.0%	+45.67%	0
BAMCO INC /NY/	Increased	680,431(+133.7%)	$106.8M	0.2%	+0.79%	58

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WMSADVANCED DRAIN SYS INC DEL

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High Conviction Moves-Smart Money Convergence-Fund Consensus-Double-Down Detection

Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer