Advanced Drainage Systems, Inc.
US ˙ NYSE ˙ US00790R1041

SecurityWMS / Advanced Drainage Systems, Inc.
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Parallel Advisors, LLC closes position in WMS / Advanced Drainage Systems, Inc.

On June 2, 2026 - Parallel Advisors, LLC filed a 13F-HR/A 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 11, 2026 disclosing 870 shares of Advanced Drainage Systems, Inc.. This represents a change in shares of -100.00% during the quarter. 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)
2026-06-02 2026-03-31 13F/A-1 ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 0 -870 -100.00 0 -100.00
2026-02-11 2025-12-31 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 870 -359 -29.21 126 -25.88 0.0023
2025-11-13 2025-09-30 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 1,229 799 185.81 170 246.94 0.0031
2025-07-08 2025-06-30 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 430 275 177.42 49 206.25 0.0010
2025-04-08 2025-03-31 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 155 52 50.49 17 45.45 0.0004
2025-02-10 2024-12-31 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 103 16 18.39 12 -15.38 0.0003
2024-11-13 2024-09-30 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 87 -17 -16.35 14 -18.75 0.0003
2024-08-08 2024-06-30 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 104 34 48.57 17 33.33 0.0004
2024-05-06 2024-03-31 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 70 -5 -6.67 12 20.00 0.0003
2024-02-12 2023-12-31 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 75 -7 -8.54 11 11.11 0.0003
2024-05-20 2023-09-30 13F/A-1 ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 82 1 1.23 9 0.00 0.0003
2023-11-14 2023-09-30 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 82 1 9 0.0003
2024-05-20 2023-06-30 13F/A-1 ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 81 57 237.50 9 350.00 0.0003
2023-08-04 2023-06-30 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 81 57 9 0.0003
2024-05-20 2023-03-31 13F/A-1 ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 24 -17 -41.46 2 -33.33 0.0001
2023-04-25 2023-03-31 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 24 -17 2 0.0001
2023-02-06 2022-12-31 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 41 -37 -47.44 3 -70.00 0.0001
2022-11-10 2022-09-30 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 78 -48 -38.10 10 -9.09 0.0005
2022-08-01 2022-06-30 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 126 -68 -35.05 11 -54.17 0.0005
2022-04-28 2022-03-31 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 194 91 88.35 24 71.43 0.0010
2022-01-20 2021-12-31 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 103 -7 -6.36 14 16.67 0.0005
2021-11-02 2021-09-30 13F/A-1 ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 110 12 12.24 12 9.09 0.0005
2021-10-22 2021-09-30 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 98 0 11 0.0005
2021-08-06 2021-06-30 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 98 54 122.73 11 120.00 0.0005
2021-04-23 2021-03-31 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 44 39 780.00 5 0.0002
2021-02-02 2020-12-31 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 5 0 0.00 0 0.0000
2020-10-27 2020-09-30 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 5 0 0.00 0 0.0000
2020-07-16 2020-06-30 13F ADVANCED DRAIN SYS INC DEL COM Stock 00790R104 5 5 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.