Advanced Drainage Systems Ownership | Who Owns Advanced Drainage Systems?
Advanced Drainage Systems Ownership Summary
Advanced Drainage Systems is owned by 62.40% institutional investors, 7.95% insiders, and 29.65% retail investors. Blackrock is the largest institutional shareholder, holding 9.69% of WMS shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 3.16% of its assets in Advanced Drainage Systems shares.
WMS Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Advanced Drainage Systems | 62.40% | 7.95% | 29.65% |
| Sector | Industrials Stocks | 44.97% | 12.43% | 42.61% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock | 7.58M | 9.69% | $1.22B |
| Vanguard group | 7.41M | 9.53% | $1.07B |
| Blackrock funding, inc. /de | 7.11M | 9.15% | $1.03B |
| State street | 2.55M | 3.29% | $353.95M |
| Ubs asset management americas | 2.56M | 3.29% | $370.09M |
| First trust advisors lp | 2.42M | 3.12% | $335.23M |
| Baillie gifford | 2.24M | 2.89% | $325.00M |
| Impax asset management group | 2.07M | 2.66% | $299.32M |
| Morgan stanley | 1.71M | 2.20% | $247.68M |
| Impactive capital lp | 1.66M | 2.15% | $230.80M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Owls nest partners ia | 303.54K | 11.70% | $42.10M |
| Impactive capital lp | 1.66M | 11.10% | $230.80M |
| Ack asset management | 390.00K | 6.77% | $54.09M |
| Triodos investment management bv | 538.01K | 5.71% | $79.06M |
| Sg capital management | 328.70K | 4.06% | $45.59M |
| Alpine peaks capital, lp | 32.52K | 3.92% | $4.51M |
| Prentiss smith | 43.05K | 3.72% | $6.24M |
| Mig capital | 179.88K | 3.62% | $24.95M |
| Edentree asset management | 55.06K | 2.44% | $7.97M |
| Tradelink capital | 2.09K | 2.42% | $303.00K |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Norges bank | 1.08M | 0.02% | 1.08M |
| Wellington management group llp | 1.19M | 0.03% | 832.93K |
| Interval partners, lp | 968.53K | 2.19% | 479.41K |
| Sg capital management | 328.70K | 4.06% | 328.70K |
| Westwood group | 515.17K | 0.51% | 263.69K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Amundi | 707.38K | 0.03% | -443.32K |
| Impax asset management group | 2.07M | 1.87% | -433.35K |
| Alyeska investment group | - | - | -422.08K |
| Pictet asset management sa | 1.66M | 0.23% | -412.89K |
| Close asset management | - | - | -374.93K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Norges bank | 1.08M | 0.02% | 1.08M | $156.59M |
| Sg capital management | 328.70K | 4.06% | 328.70K | $45.59M |
| Axa investment managers | 176.81K | 0.07% | 176.81K | $24.52M |
| Hill city capital, lp | 150.00K | 0.88% | 150.00K | $20.80M |
| Driehaus capital management | 124.86K | 0.12% | 124.86K | $17.32M |
Sold Out
| Holder | Change |
|---|---|
| Nelson, van denburg & campbell wealth management group | -1.00 |
| New millennium group | -2.00 |
| Rakuten securities | -2.00 |
| Td capital management | -2.00 |
| Migdal insurance & financial | -3.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Dec 31, 2025 | 393 | -22.49% | 48,518,787 | -33.18% | 62 | 0.71% | 172 | -30.65% | 151 | -15.64% |
| Sep 30, 2025 | 358 | -24.95% | 46,733,114 | -33.28% | 60 | 0.74% | 158 | -36.55% | 141 | -15.57% |
| Jun 30, 2025 | 482 | 1.69% | 72,251,158 | 4.96% | 93 | 1.18% | 252 | -1.18% | 168 | 13.51% |
| Mar 31, 2025 | 472 | -0.42% | 67,928,962 | 1.25% | 87 | 1.17% | 253 | 0.80% | 148 | -3.27% |
| Dec 31, 2024 | 253 | -48.99% | 41,939,922 | -35.33% | 54 | 0.77% | 123 | -46.05% | 84 | -55.56% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard US Total Market Shares ETF | 2.45M | 3.16% | 1.76K |
| Vanguard Total Stock Mkt Idx Inv | 2.44M | 3.14% | -51.66K |
| iShares Core S&P Mid-Cap ETF | 2.30M | 2.96% | - |
| Vanguard Small Cap Index | 1.88M | 2.42% | -11.92K |
| Impax Water Strategy Composite | 1.80M | 2.31% | -159.75K |
| Pictet-Water I EUR | 1.60M | 2.06% | 106.48K |
| Pictet Water Segregated Accounts | 1.56M | 2.02% | 1.56M |
| First Trust RBA Amer Indl RenaisTM ETF | 1.22M | 1.57% | 7.66K |
| Vanguard Small Cap Growth Index Inv | 1.06M | 1.36% | -2.76K |
| BNP Paribas Aqua I | 924.99K | 1.19% | -79.87K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Dec 03, 2025 | EVERSOLE ROBERT M | - | Sell | $1.62M |
| Nov 26, 2025 | WAUN THOMAS J. SR. | EVP, International | Sell | $232.50K |
| Nov 12, 2025 | WAUN THOMAS J. SR. | EVP, International | Sell | $150.00K |
| Nov 11, 2025 | WAUN THOMAS J. SR. | EVP, International | Sell | $188.69K |
| Nov 12, 2025 | BARBOUR D. SCOTT | See Remarks | Sell | $671.66K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q4 | - | 9 |
| 2025 Q3 | - | - |
| 2025 Q2 | - | 1 |
| 2025 Q1 | - | 1 |
| 2024 Q4 | - | - |
WMS Ownership FAQ
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