Advanced Drainage Systems, Inc.
MX ˙ BMV ˙ US00790R1041
SecurityMX:WMS / Advanced Drainage Systems, Inc.
InstitutionCwm, Llc
Latest Disclosed Ownership3,069 shares
Latest Disclosed Value $ 420,883
Cwm, Llc reports 228.94% increase in ownership of WMS / Advanced Drainage Systems, Inc.

On May 14, 2026 - Cwm, Llc filed a 13F-HR form disclosing ownership of 3,069 shares of Advanced Drainage Systems, Inc. (MX:WMS) valued at $420,883 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 933 shares of Advanced Drainage Systems, Inc..

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 3,069 2,136 228.94 421 0.0011
2026-01-26 2025-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 933 231 32.91 0 0.0004
2025-10-15 2025-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 702 98 16.23 0 0.0003
2025-07-25 2025-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 604 24 4.14 0 0.0002
2025-05-01 2025-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 580 35 6.42 0 0.0003
2025-02-04 2024-12-31 13F ANCED DRAIN SYS INC DEL COM 00790R104 545 -10 -1.80 0 0.0003
2024-10-08 2024-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 555 85 18.09 0 0.0004
2024-07-10 2024-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 470 -2 -0.42 0 0.0004
2024-04-05 2024-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 472 167 54.75 0 0.0004
2024-02-01 2023-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 305 -43 -12.36 0 0.0002
2023-10-11 2023-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 348 3 0.87 0 0.0002
2023-08-03 2023-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 345 -198 -36.46 0 0.0002
2023-05-01 2023-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 543 65 13.60 0 0.0003
2023-02-01 2022-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 478 185 63.14 0 -100.00 0.0003
2022-10-27 2022-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 293 27 10.15 36 50.00 0.0003
2022-07-28 2022-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 266 162 155.77 24 100.00 0.0002
2022-04-21 2022-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 104 92 766.67 12 500.00 0.0001
2022-01-31 2021-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 12 -18 -60.00 2 -33.33 0.0000
2021-09-15 2021-06-30 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 30 0 0.00 3 0.00 0.0000
2021-07-29 2021-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 30 0 3 0.0000
2021-09-15 2021-03-31 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 30 0 0.00 3 0.00 0.0000
2021-04-27 2021-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 30 0 3 0.0000
2021-09-15 2020-12-31 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 30 0 0.00 3 0.00 0.0000
2021-01-27 2020-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 30 0 3 0.0000
2021-09-15 2020-09-30 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 30 0 0.00 3 0.00 0.0000
2020-10-19 2020-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 30 0 2 0.0000
2021-09-15 2020-06-30 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 30 0 0.00 3 0.00 0.0000
2021-09-15 2020-03-31 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 30 0 0.00 3 0.00 0.0000
2021-09-14 2019-12-31 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 30 0 0.00 3 0.00 0.0000
2021-09-14 2019-09-30 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 30 0 0.00 3 0.00 0.0000
2021-09-14 2019-06-30 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 30 0 0.00 3 0.00 0.0000
2021-09-02 2019-03-31 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 30 30 3 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.