Advanced Drainage Systems, Inc.
MX ˙ BMV ˙ US00790R1041
SecurityMX:WMS / Advanced Drainage Systems, Inc.
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership1,841 shares
Latest Disclosed Value $ 252,490
Advisor Group Holdings, Inc. reports 39.24% decrease in ownership of WMS / Advanced Drainage Systems, Inc.

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 1,841 shares of Advanced Drainage Systems, Inc. (MX:WMS) valued at $252,490 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 3,030 shares of Advanced Drainage Systems, Inc.. This represents a change in shares of -39.24% 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)
2026-05-15 2026-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 1,841 -1,189 -39.24 252 -42.47 0.0002
2026-02-17 2025-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 3,030 -11,848 -79.63 439 -79.41 0.0006
2025-11-14 2025-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 14,878 -509 -3.31 2,127 20.37 0.0030
2025-09-04 2025-06-30 13F/A-1 DVANCED DRAIN SYS INC DEL COM 00790R104 15,387 794 5.44 1,767 11.48 0.0031
2025-08-13 2025-06-30 13F DVANCED DRAIN SYS INC DEL COM 00790R104 12,282 -2,311 1,418 0.0016
2025-05-12 2025-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 14,593 3,908 36.57 1,585 28.34 0.0035
2025-06-06 2024-12-31 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 10,685 -3,627 -25.34 1,235 -45.09 0.0028
2025-02-07 2024-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 9,466 -4,846 1,463 0.0037
2024-11-13 2024-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 14,312 1,886 15.18 2,249 12.90 0.0051
2024-08-13 2024-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 12,426 -830 -6.26 1,993 -12.71 0.0047
2024-05-10 2024-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 13,256 -118 -0.88 2,283 21.32 0.0051
2024-02-12 2023-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 13,374 5,815 76.93 1,881 118.72 0.0033
2023-11-13 2023-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 7,559 -2,477 -24.68 861 -25.09 0.0013
2023-08-21 2023-06-30 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 10,036 443 4.62 1,148 44.22 0.0021
2023-08-10 2023-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 10,036 443 1,148 0.0003
2023-05-12 2023-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 9,593 2,506 35.36 796 37.01 0.0015
2023-02-10 2022-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 7,087 -713 -9.14 582 -40.16 0.0012
2022-11-14 2022-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 7,800 3,006 62.70 971 124.25 0.0022
2022-08-10 2022-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 4,794 -113 -2.30 433 -25.86 0.0010
2022-05-04 2022-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 4,907 -662 -11.89 584 -22.85 0.0011
2022-02-03 2021-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 5,569 -3,655 -39.62 757 -24.30 0.0014
2021-11-05 2021-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 9,224 -427 -4.42 1,000 -11.19 0.0021
2021-08-02 2021-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 9,651 4,391 83.48 1,126 105.85 0.0024
2021-05-13 2021-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 5,260 -165 -3.04 547 20.48 0.0013
2021-02-10 2020-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 5,425 -22,748 -80.74 454 -74.19 0.0012
2020-11-12 2020-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 28,173 22,751 419.61 1,759 556.34 0.0053
2020-08-14 2020-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 5,422 3,108 134.31 268 294.12 0.0009
2020-05-18 2020-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 2,314 2,314 68 0.0003
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.