Advanced Drainage Systems, Inc.
MX ˙ BMV ˙ US00790R1041
SecurityMX:WMS / Advanced Drainage Systems, Inc.
InstitutionNomura Asset Management Co Ltd
Latest Disclosed Ownership80,614 shares
Latest Disclosed Value $ 11,054,598
Nomura Asset Management Co Ltd reports 266.58% increase in ownership of WMS / Advanced Drainage Systems, Inc.

On May 11, 2026 - Nomura Asset Management Co Ltd filed a 13F-HR form disclosing ownership of 80,614 shares of Advanced Drainage Systems, Inc. (MX:WMS) valued at $11,054,598 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 21,991 shares of Advanced Drainage Systems, Inc.. This represents a change in shares of 266.58% during the quarter.

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)
2026-05-11 2026-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 80,614 58,623 266.58 11,055 247.17 0.0178
2026-02-10 2025-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 21,991 0 0.00 3,185 4.39 0.0081
2025-11-12 2025-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 21,991 0 0.00 3,050 20.79 0.0080
2025-08-11 2025-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 21,991 2,411 12.31 2,526 18.71 0.0069
2025-05-12 2025-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 19,580 -398 -1.99 2,127 -7.88 0.0065
2025-02-12 2024-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 19,978 -271 -1.34 2,309 -27.44 0.0069
2024-11-15 2024-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 20,249 819 4.22 3,182 2.12 0.0098
2024-08-14 2024-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 19,430 -1,369 -6.58 3,116 -13.01 0.0106
2024-05-13 2024-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 20,799 -725 -3.37 3,582 18.33 0.0130
2024-02-09 2023-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 21,524 -1,677 -7.23 3,027 14.66 0.0125
2023-11-03 2023-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 23,201 -3,482 -13.05 2,641 -13.01 0.0124
2023-08-14 2023-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 26,683 -1,132 -4.07 3,036 29.59 0.0140
2025-01-10 2023-03-31 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 27,815 -842 -2.94 2,342 -0.30 0.0123
2023-05-11 2023-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 27,815 -842 2,342 0.0123
2025-01-10 2022-12-31 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 28,657 8,264 40.52 2,349 -7.37 0.0136
2023-02-14 2022-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 28,657 8,264 2,349 0.0136
2025-01-10 2022-09-30 13F/A-3 ADVANCED DRAIN SYS INC DEL COM 00790R104 20,393 20,393 2,536 0.0161
2022-11-14 2022-09-30 13F/A-2 ADVANCED DRAIN SYS INC DEL COM 00790R104 20,393 20,393 2,536 0.0161
2022-11-10 2022-09-30 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 20,393 20,393 2,536 0.0161
2022-11-10 2022-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 20,393 20,393 2,536 0.0102
2025-01-10 2022-06-30 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2022-08-12 2022-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2025-01-10 2022-03-31 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2022-05-13 2022-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2025-01-10 2021-12-31 13F/A-2 ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2022-02-01 2021-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2025-01-10 2021-09-30 13F/A-2 ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2021-11-12 2021-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2025-01-10 2021-06-30 13F/A-2 ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2021-08-06 2021-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2025-01-10 2021-03-31 13F/A-2 ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2021-05-14 2021-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2025-01-10 2020-12-31 13F/A-2 ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2021-02-12 2020-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2020-11-12 2020-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2020-08-13 2020-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2020-05-14 2020-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2020-02-13 2019-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2019-11-13 2019-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2019-08-13 2019-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2019-05-10 2019-03-31 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2019-02-12 2018-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2018-11-07 2018-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2018-08-03 2018-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2018-05-14 2018-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2018-02-14 2017-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2017-11-13 2017-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2017-06-28 2017-03-31 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 0.0000
2017-02-14 2016-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 0 0 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.