Advanced Drainage Systems, Inc.
US ˙ NYSE ˙ US00790R1041

SecurityWMS / Advanced Drainage Systems, Inc.
InstitutionWiley Bros.-aintree Capital, Llc
Latest Disclosed Ownership13,378 shares
Latest Disclosed Value $ 1,834,513
Wiley Bros.-aintree Capital, Llc reports 22.93% decrease in ownership of WMS / Advanced Drainage Systems, Inc.

On May 15, 2026 - Wiley Bros.-aintree Capital, Llc filed a 13F-HR form disclosing ownership of 13,378 shares of Advanced Drainage Systems, Inc. (US:WMS) valued at $1,834,525 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 17,359 shares of Advanced Drainage Systems, Inc.. This represents a change in shares of -22.93% during the quarter. The current value of the position is $1,772,719 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 13,378 -3,981 -22.93 1,835 -27.05 0.0091
2026-02-17 2025-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 17,359 -4,372 -20.12 2,514 -16.59 0.0132
2025-11-14 2025-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 21,731 -1,086 -4.76 3,015 14.91 0.0193
2025-08-14 2025-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 22,817 5,102 28.80 2,623 36.47 0.0201
2025-05-15 2025-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 17,715 7,098 66.86 1,923 56.90 0.0204
2025-02-14 2024-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 10,617 127 1.21 1,226 -25.67 0.0147
2024-11-14 2024-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 10,490 10,490 1,649 0.0318
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.