Advanced Drainage Systems Ownership | Who Owns Advanced Drainage Systems?
Advanced Drainage Systems Ownership Summary
Advanced Drainage Systems is owned by 31.15% institutional investors, 6.83% insiders, and 62.01% retail investors. Blackrock is the largest institutional shareholder, holding 9.69% of WMS shares. UBS: Global Equity is the top mutual fund, with 5.87% of its assets in Advanced Drainage Systems shares.
WMS Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Advanced Drainage Systems | 31.15% | 6.83% | 62.01% |
| Sector | Industrials Stocks | 49.74% | 15.70% | 34.56% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock | 7.58M | 9.69% | $1.22B |
| Blackrock funding, inc. /de | 7.42M | 9.55% | $1.02B |
| Vanguard group | 7.41M | 9.53% | $1.07B |
| State street | 2.49M | 3.20% | $341.39M |
| Ubs asset management americas | 2.45M | 3.15% | $335.99M |
| Pictet asset management sa | 2.20M | 2.84% | $302.29M |
| Baillie gifford | 2.05M | 2.63% | $280.75M |
| First trust advisors lp | 2.04M | 2.63% | $280.30M |
| Impax asset management group | 1.93M | 2.48% | $264.32M |
| American century companies | 1.66M | 2.13% | $227.33M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Owls nest partners ia | 264.10K | 12.68% | $36.22M |
| Impactive capital lp | 856.49K | 8.52% | $117.45M |
| Ack asset management | 390.00K | 6.68% | $53.48M |
| Triodos investment management bv | 536.71K | 5.57% | $73.60M |
| Alpine peaks capital, lp | 30.67K | 4.24% | $4.21M |
| Mig capital | 179.88K | 3.62% | $24.95M |
| Prentiss smith | 43.76K | 3.48% | $6.00M |
| Rik saylor financial | 22.91K | 2.39% | $3.14M |
| Edentree asset management | 55.06K | 2.28% | $7.55M |
| Impax asset management group | 1.93M | 1.84% | $264.32M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Norges bank | 1.08M | 0.02% | 1.08M |
| Pictet asset management sa | 2.20M | 0.32% | 546.30K |
| Vanguard fiduciary trust | 449.65K | 0.02% | 449.65K |
| Adage capital partners gp | 550.00K | 0.12% | 400.00K |
| Qube research | 546.41K | 0.08% | 325.74K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Citadel advisors | 88.72K | 0.00% | -773.97K |
| Impactive capital lp | 856.49K | 8.52% | -601.25K |
| Balyasny asset management | 3.07K | 0.00% | -455.84K |
| Amundi | 707.38K | 0.03% | -443.32K |
| Canada pension plan investment board | 81.88K | 0.01% | -417.90K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Norges bank | 1.08M | 0.02% | 1.08M | $156.59M |
| Vanguard fiduciary trust | 449.65K | 0.02% | 449.65K | $61.66M |
| Alyeska investment group | 258.51K | 0.10% | 258.51K | $35.45M |
| Axa investment managers | 176.81K | 0.07% | 176.81K | $24.52M |
| Arrowstreet capital, limited partnership | 123.64K | 0.01% | 123.64K | $16.96M |
Sold Out
| Holder | Change |
|---|---|
| Nelson, van denburg & campbell wealth management group | -1.00 |
| New millennium group | -2.00 |
| Td capital management | -2.00 |
| Rakuten securities | -2.00 |
| Migdal insurance & financial | -3.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| 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% |
| Mar 31, 2025 | 472 | -0.42% | 67,928,962 | 1.25% | 87 | 1.17% | 253 | 0.80% | 148 | -3.27% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| UBS: Global Equity | 4.57M | 5.87% | - |
| Vanguard Total Stock Mkt Idx Inv | 2.48M | 3.18% | 12.12K |
| Vanguard US Total Market Shares ETF | 2.45M | 3.16% | 1.76K |
| iShares Core S&P Mid-Cap ETF | 2.42M | 3.11% | -1.22K |
| Vanguard Small Cap Index | 1.80M | 2.31% | 32.52K |
| Pictet-Water I EUR | 1.72M | 2.20% | 3.07K |
| Pictet Water Segregated Accounts | 1.56M | 2.02% | 1.56M |
| First Trust RBA Amer Indl RenaisTM ETF | 1.55M | 1.99% | 5.83K |
| Impax Water Strategy Composite | 1.15M | 1.48% | 1.66K |
| Vanguard Small Cap Growth Index Inv | 1.01M | 1.29% | 26.63K |
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 Q1 | - | - |
| 2025 Q4 | - | 9 |
| 2025 Q3 | - | - |
| 2025 Q2 | - | 1 |
| 2025 Q1 | - | 1 |
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