Advanced Drainage Systems Ownership | Who Owns Advanced Drainage Systems?
Advanced Drainage Systems Ownership Summary
Advanced Drainage Systems is owned by 89.50% institutional investors, 7.17% insiders, and 3.33% retail investors. Blackrock is the largest institutional shareholder, holding 9.69% of WMS shares. UBS: Global Equity is the top mutual fund, with 5.97% of its assets in Advanced Drainage Systems shares.
WMS Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Advanced Drainage Systems | 89.50% | 7.17% | 3.33% |
| Sector | Basic Materials Stocks | 58.45% | 12.42% | 29.12% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock | 7.58M | 9.69% | $1.22B |
| Blackrock funding, inc. /de | 7.47M | 9.60% | $1.17B |
| Vanguard group | 7.41M | 9.53% | $1.07B |
| Vanguard capital management | 3.40M | 4.37% | $533.20M |
| State street | 2.69M | 3.46% | $422.80M |
| First trust advisors lp | 2.66M | 3.42% | $417.63M |
| Ubs asset management americas | 2.35M | 3.02% | $368.33M |
| Impax asset management group | 1.85M | 2.37% | $289.74M |
| Baillie gifford | 1.84M | 2.36% | $288.07M |
| American century companies | 1.63M | 2.10% | $256.52M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Owls nest partners ia | 211.84K | 10.79% | $33.25M |
| Impactive capital lp | 782.79K | 8.77% | $122.87M |
| Ack asset management | 390.00K | 7.15% | $61.21M |
| Triodos investment management bv | 528.31K | 5.05% | $82.92M |
| Alpine peaks capital, lp | 25.34K | 4.66% | $3.98M |
| Bdf-gestion | 11.69K | 4.08% | $30.48M |
| Prentiss smith | 43.21K | 3.72% | $6.78M |
| Mig capital | 179.88K | 3.62% | $24.95M |
| Rik saylor financial | 25.60K | 2.66% | $4.02M |
| Edentree asset management | 50.20K | 2.40% | $7.88M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Norges bank | 1.30M | 0.02% | 1.30M |
| Sixth street partners management company | 696.50K | 0.01% | 696.50K |
| First trust advisors lp | 2.66M | 0.25% | 616.70K |
| Bamco inc /ny/ | 680.43K | 0.16% | 389.28K |
| Balyasny asset management | 342.93K | 0.07% | 339.86K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Pictet asset management sa | 1.13M | 0.17% | -1.08M |
| William blair investment management | - | - | -655.68K |
| Adage capital partners gp | 150.00K | 0.03% | -400.00K |
| Close asset management | - | - | -374.93K |
| Mirae asset global investments | - | - | -370.80K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Norges bank | 1.30M | 0.02% | 1.30M | $204.63M |
| Sixth street partners management company | 696.50K | 0.01% | 696.50K | $109.32M |
| Axa investment managers | 176.81K | 0.07% | 176.81K | $24.52M |
| Susquehanna fundamental investments | 118.31K | 0.35% | 118.31K | $18.57M |
| J. goldman & co lp | 104.80K | 0.37% | 104.80K | $14.54M |
Sold Out
| Holder | Change |
|---|---|
| Curio wealth | -1.00 |
| Nelson, van denburg & campbell wealth management group | -1.00 |
| Activest wealth management | -2.00 |
| Rakuten securities | -2.00 |
| New millennium group | -2.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 30, 2026 | 556 | -5.76% | 69,648,056 | 0.36% | 89 | 1.13% | 259 | -19.81% | 203 | 22.29% |
| Mar 31, 2026 | 315 | -42.73% | 24,218,242 | -65.93% | 31 | 0.37% | 167 | -32.39% | 85 | -60.28% |
| 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% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| UBS: Global Equity | 4.57M | 5.97% | - |
| iShares Core S&P Mid-Cap ETF | 2.46M | 3.21% | 76.00 |
| Vanguard Morn Total Stk Mkt Idx Investor | 2.43M | 3.17% | -49.83K |
| Vanguard Total Stock Mkt Idx Inv | 2.43M | 3.17% | -49.83K |
| Vanguard US Total Market Shares ETF | 2.45M | 3.16% | 1.76K |
| Pictet-Water I EUR | 1.91M | 2.49% | 191.04K |
| Vanguard Small Cap Index | 1.76M | 2.29% | -35.48K |
| First Trust RBA Amer Indl RenaisTM ETF | 1.73M | 2.26% | 2.98K |
| Pictet Water Segregated Accounts | 1.56M | 2.02% | 1.56M |
| Impax Water Strategy Composite | 1.15M | 1.50% | - |
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 |
|---|---|---|
| 2026 Q2 | - | - |
| 2026 Q1 | - | - |
| 2025 Q4 | - | 9 |
| 2025 Q3 | - | - |
| 2025 Q2 | - | 1 |
WMS Ownership FAQ
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