Advanced Drainage Systems, Inc.
MX ˙ BMV ˙ US00790R1041
SecurityMX:WMS / Advanced Drainage Systems, Inc.
InstitutionFirst Trust Advisors Lp
Latest Disclosed Ownership2,044,057 shares
Latest Disclosed Value $ 280,301,449
First Trust Advisors Lp reports 15.63% decrease in ownership of WMS / Advanced Drainage Systems, Inc.

On May 13, 2026 - First Trust Advisors Lp filed a 13F-HR form disclosing ownership of 2,044,057 shares of Advanced Drainage Systems, Inc. (MX:WMS) valued at $280,301,449 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 2,422,676 shares of Advanced Drainage Systems, Inc.. This represents a change in shares of -15.63% 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)
2026-05-13 2026-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 2,044,057 -378,619 -15.63 280,301 -20.11 0.1998
2026-02-13 2025-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 2,422,676 5,734 0.24 350,876 4.67 0.2550
2025-11-12 2025-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 2,416,942 238,179 10.93 335,230 33.96 0.2491
2025-08-13 2025-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 2,178,763 117,963 5.72 250,253 11.77 0.2013
2025-05-14 2025-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 2,060,800 327,973 18.93 223,906 11.78 0.1983
2025-02-13 2024-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 1,732,827 544,109 45.77 200,315 7.22 0.1766
2024-11-13 2024-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 1,188,718 441,501 59.09 186,819 55.88 0.1780
2024-08-13 2024-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 747,217 32,583 4.56 119,846 -2.63 0.1222
2024-05-13 2024-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 714,634 105,240 17.27 123,089 43.62 0.1249
2024-02-13 2023-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 609,394 -111,783 -15.50 85,705 4.40 0.0935
2023-11-13 2023-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 721,177 20,398 2.91 82,092 2.96 0.0973
2023-08-14 2023-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 700,779 60,797 9.50 79,735 47.95 0.0907
2023-05-15 2023-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 639,982 87,453 15.83 53,893 18.99 0.0622
2023-02-09 2022-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 552,529 149,718 37.17 45,291 -9.60 0.0539
2022-11-14 2022-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 402,811 -116,855 -22.49 50,098 7.03 0.0650
2022-08-12 2022-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 519,666 -109,893 -17.46 46,806 -37.42 0.0578
2022-05-13 2022-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 629,559 -35,137 -5.29 74,798 -17.34 0.0765
2022-02-08 2021-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 664,696 -42,480 -6.01 90,485 18.29 0.0880
2021-11-15 2021-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 707,176 328,438 86.72 76,495 73.27 0.0823
2021-10-12 2021-06-30 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 378,738 42,016 12.48 44,149 26.81 0.0478
2021-08-16 2021-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 378,738 42,016 44,149 0.0455
2021-05-14 2021-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 336,722 -60,930 -15.32 34,814 4.75 0.0422
2021-02-02 2020-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 397,652 12,374 3.21 33,236 38.16 0.0440
2020-11-05 2020-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 385,278 -54,972 -12.49 24,057 10.62 0.0385
2020-07-22 2020-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 440,250 46,342 11.76 21,748 87.53 0.0377
2020-05-06 2020-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 393,908 9,966 2.60 11,597 -22.23 0.0263
2020-02-03 2019-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 383,942 -14,468 -3.63 14,912 15.98 0.0255
2019-11-04 2019-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 398,410 73,296 22.54 12,857 20.61 0.0242
2019-07-30 2019-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 325,114 -18,339 -5.34 10,660 20.44 0.0201
2019-06-19 2019-03-31 13F/A-1 ADVANCED DRAIN SYS INC DEL COM 00790R104 343,453 4,111 1.21 8,851 7.56 0.0176
2019-05-09 2019-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 343,453 4,111 8,851
2019-02-07 2018-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 339,342 -41,652 -10.93 8,229 -30.10 0.0195
2018-10-25 2018-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 380,994 18,539 5.11 11,773 13.77 0.0219
2018-08-02 2018-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 362,455 111,452 44.40 10,348 59.18 0.0215
2018-04-23 2018-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 251,003 -41,797 -14.27 6,501 -6.90 0.0149
2018-02-08 2017-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 292,800 21,856 8.07 6,983 27.26 0.0166
2017-10-24 2017-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 270,944 5,265 1.98 5,487 2.75 0.0141
2017-08-02 2017-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 265,679 58,820 28.43 5,340 17.88 0.0143
2017-05-02 2017-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 206,859 -25,626 -11.02 4,530 -5.41 0.0126
2017-02-06 2016-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 232,485 232,485 131.27 4,789 83.56 0.0143
2014-08-08 2013-12-31 13F/A-1 WMS INDS COM 929297109 0 -100,527 -100.00 0 -100.00
2013-11-12 2013-09-30 13F WMS INDS COM 929297109 100,527 7,617 8.20 2,609 10.08 0.0141
2013-08-12 2013-06-30 13F WMS INDS COM 929297109 92,910 92,910 2,370 0.0154
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.