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WMS · Advanced Drainage Systems, Inc.

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$146.41 +2.31 (+1.60%) At close · Aug 19
Market Cap
$10.87B
Shares
75.41M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 544
Total Value: $10,950,843,200
Total Shares: 69,786,711

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 544 13F filers · Δ vs Mar 31, 2026
Top Holder
10.7%
Sep 2023 → Jun 2026 · range 10.2% – 12.0%
+0.0 pts
Top 5
28.6%
Sep 2023 → Jun 2026 · range 27.9% – 36.3%
+0.7 pts
Top 10
41.5%
Sep 2023 → Jun 2026 · range 41.5% – 49.6%
−0.5 pts
HHI
276
Sep 2023 → Jun 2026 · range 274 – 394
Broadly held+2

Quarterly Activity

vs Mar 31, 2026
New
59
Increased
196
Decreased
206
Sold Out
94
Unchanged
83
Holder count: -35
Institutional value: +14.7%
Shares held: +0.2%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 555
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1604028 CUSIP 00790R104 13F (30d) 503 filings 474 filers Visit website Investor relations