Advanced Drainage Systems, Inc.
US ˙ NYSE ˙ US00790R1041

SecurityWMS / Advanced Drainage Systems, Inc.
InstitutionCreative Planning
Latest Disclosed Ownership24,733 shares
Latest Disclosed Value $ 3,391,662
Creative Planning reports 24.09% increase in ownership of WMS / Advanced Drainage Systems, Inc.

On May 12, 2026 - Creative Planning filed a 13F-HR form disclosing ownership of 24,733 shares of Advanced Drainage Systems, Inc. (US:WMS) valued at $3,391,636 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 19,932 shares of Advanced Drainage Systems, Inc.. This represents a change in shares of 24.09% during the quarter. The current value of the position is $3,277,370 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-12 2026-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 24,733 4,801 24.09 3,392 17.50 0.0023
2026-02-17 2025-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 19,932 2,379 13.55 2,887 18.57 0.0021
2025-11-14 2025-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 17,553 948 5.71 2,435 27.64 0.0019
2025-08-08 2025-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 16,605 -1,481 -8.19 1,907 -2.95 0.0016
2025-05-15 2025-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 18,086 6,166 51.73 1,965 42.60 0.0018
2025-02-14 2024-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 11,920 210 1.79 1,378 -25.11 0.0013
2024-10-11 2024-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 11,710 7,009 149.10 1,840 144.03 0.0018
2024-08-15 2024-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 4,701 401 9.33 754 1.89 0.0008
2024-05-13 2024-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 4,300 258 6.38 741 30.28 0.0008
2024-02-14 2023-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 4,042 149 3.83 568 28.22 0.0011
2023-11-16 2023-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 3,893 160 4.29 443 4.48 0.0006
2023-07-21 2023-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 3,733 405 12.17 425 51.43 0.0006
2023-05-15 2023-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 3,328 563 20.36 280 23.89 0.0004
2023-02-10 2022-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 2,765 -300 -9.79 227 -40.68 0.0003
2022-11-03 2022-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 3,065 199 6.94 381 47.67 0.0007
2022-08-15 2022-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 2,866 208 7.83 258 -18.35 0.0004
2022-05-16 2022-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 2,658 1 0.04 316 -12.71 0.0005
2022-02-11 2021-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 2,657 12 0.45 362 26.57 0.0006
2021-11-10 2021-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 2,645 0 0.00 286 -7.14 0.0005
2021-08-04 2021-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 2,645 2,645 308 0.0005
2017-01-09 2016-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 -55 -100.00 0 -100.00
2016-10-12 2016-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 55 -245 -81.67 1 -87.50 0.0000
2013-10-10 2013-09-30 13F WMS INDS COM 929297109 300 0 0.00 8 0.00 0.0002
2013-07-09 2013-06-30 13F WMS INDS COM 929297109 300 300 8 0.0002
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.