Advanced Drainage Systems, Inc.
US ˙ NYSE ˙ US00790R1041

SecurityWMS / Advanced Drainage Systems, Inc.
InstitutionEngineers Gate Manager LP
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Engineers Gate Manager LP closes position in WMS / Advanced Drainage Systems, Inc.

On May 15, 2026 - Engineers Gate Manager LP filed a 13F-HR form disclosing ownership of 0 shares of Advanced Drainage Systems, Inc. (US:WMS) valued at $0 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 12,972 shares of Advanced Drainage Systems, Inc.. The current value of the position is $0 USD.

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)
2026-05-15 2026-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 -100.00 0
2026-02-17 2025-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 12,972 10,455 415.38 1,879 438.11 0.0223
2025-11-14 2025-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 2,517 -13,691 -84.47 349 -81.25 0.0040
2025-08-14 2025-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 16,208 10,308 174.71 1,862 190.33 0.0232
2025-05-15 2025-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 5,900 -2,285 -27.92 641 -32.24 0.0108
2025-02-14 2024-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 8,185 8,185 946 0.0165
2024-11-14 2024-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 -39,017 -100.00 0 -100.00
2024-08-14 2024-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 39,017 8,590 28.23 6,258 19.41 0.1411
2024-05-15 2024-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 30,427 25,955 580.39 5,241 734.39 0.1380
2024-02-14 2023-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 4,472 -6,634 -59.73 629 -50.32 0.0180
2023-11-14 2023-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 11,106 11,106 1,264 0.0467
2023-05-15 2023-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 -61,675 -100.00 0 -100.00
2023-02-14 2022-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 61,675 45,099 272.07 5,056 145.15 0.3037
2022-11-14 2022-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 16,576 4,003 31.84 2,062 82.16 0.1283
2022-08-15 2022-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 12,573 12,573 1,132 0.0415
2021-08-16 2021-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 -7,079 -100.00 0 -100.00
2021-05-17 2021-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 7,079 -20,946 -74.74 732 -68.74 0.0363
2021-02-16 2020-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 28,025 -3,716 -11.71 2,342 18.16 0.1016
2020-11-16 2020-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 31,741 8,628 37.33 1,982 73.56 0.0930
2020-08-17 2020-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 23,113 15,988 224.39 1,142 443.81 0.0581
2020-05-15 2020-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 7,125 -80,401 -91.86 210 -93.82 0.0151
2020-02-14 2019-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 87,526 77,046 735.17 3,400 905.92 0.1495
2019-11-14 2019-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 10,480 10,480 338 0.0172
2019-05-15 2019-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 -26,501 -100.00 0 -100.00
2019-02-14 2018-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 26,501 -15,044 -36.21 643 -49.92 0.0515
2018-11-01 2018-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 41,545 41,545 1,284 0.0986
2015-11-16 2015-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 -7,122 -100.00 0 -100.00
2015-08-14 2015-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 7,122 -11,450 -61.65 209 -62.41 0.0205
2015-05-15 2015-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 18,572 18,572 556 0.0739
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.