Advanced Drainage Systems, Inc.
MX ˙ BMV ˙ US00790R1041
SecurityMX:WMS / Advanced Drainage Systems, Inc.
InstitutionSG Americas Securities, LLC
Latest Disclosed Ownership8,116 shares
Latest Disclosed Value $ 1,113
SG Americas Securities, LLC reports 65.49% decrease in ownership of WMS / Advanced Drainage Systems, Inc.

On April 16, 2026 - SG Americas Securities, LLC filed a 13F-HR form disclosing ownership of 8,116 shares of Advanced Drainage Systems, Inc. (MX:WMS) valued at $1,113 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 9, 2026 disclosing 23,518 shares of Advanced Drainage Systems, Inc.. This represents a change in shares of -65.49% 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)
2026-04-16 2026-03-31 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 8,116 -15,402 -65.49 1 -66.67 0.0012
2026-01-09 2025-12-31 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 23,518 5,984 34.13 3 50.00 0.0043
2025-10-23 2025-09-30 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 17,534 1,496 9.33 2 100.00 0.0082
2025-08-08 2025-06-30 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 16,038 -5,264 -24.71 2 -50.00 0.0077
2025-04-15 2025-03-31 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 21,302 21,302 2 0.0076
2025-01-17 2024-12-31 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 0 -4,445 -100.00 0 0.0000
2024-10-03 2024-09-30 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 4,445 -19,200 -81.20 1 -100.00 0.0025
2024-07-12 2024-06-30 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 23,645 1,617 7.34 4 0.00 0.0221
2024-05-06 2024-03-31 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 22,028 -17,028 -43.60 4 -40.00 0.0183
2024-01-12 2023-12-31 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 39,056 32,109 462.20 5 0.0512
2023-10-13 2023-09-30 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 6,947 4,505 184.48 1 0.0090
2023-07-10 2023-06-30 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 2,442 -3,070 -55.70 0 0.0021
2023-04-28 2023-03-31 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 5,512 1,419 34.67 0 0.0054
2023-02-02 2022-12-31 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 4,093 -4,078 -49.91 0 -100.00 0.0041
2022-10-31 2022-09-30 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 8,171 -10,064 -55.19 1,016 -38.12 0.0126
2022-07-29 2022-06-30 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 18,235 8,000 78.16 1,642 35.03 0.0175
2022-04-29 2022-03-31 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 10,235 -177 -1.70 1,216 -14.18 0.0089
2022-02-07 2021-12-31 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 10,412 -12,753 -55.05 1,417 -43.46 0.0077
2021-11-01 2021-09-30 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 23,165 -54,797 -70.29 2,506 -72.43 0.0118
2021-08-12 2021-06-30 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 77,962 15,503 24.82 9,088 40.72 0.0423
2021-05-13 2021-03-31 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 62,459 60,702 3,454.87 6,458 4,293.20 0.0338
2021-02-04 2020-12-31 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 1,757 -7,363 -80.73 147 -74.17 0.0008
2020-11-09 2020-09-30 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 9,120 -6,932 -43.18 569 -28.25 0.0036
2020-07-20 2020-06-30 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 16,052 -3,155 -16.43 793 40.35 0.0066
2020-04-30 2020-03-31 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 19,207 10,146 111.97 565 60.51 0.0053
2020-01-28 2019-12-31 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 9,061 -48,893 -84.37 352 -81.18 0.0032
2019-11-04 2019-09-30 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 57,954 52,851 1,035.68 1,870 1,019.76 0.0153
2019-07-29 2019-06-30 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 5,103 -101,044 -95.19 167 -93.89 0.0012
2019-04-29 2019-03-31 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 106,147 106,147 2,735 0.0252
2019-01-31 2018-12-31 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 0 -3,250 -100.00 0 -100.00
2018-11-06 2018-09-30 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 3,250 -301 -8.48 100 -0.99 0.0007
2018-08-07 2018-06-30 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 3,551 3,551 101 0.0009
2017-02-08 2016-12-31 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 0 -5,210 -100.00 0 -100.00
2017-02-08 2016-09-30 13F/A-1 ADVANCED DRAIN SYS INC DEL COM COM 00790R104 5,210 5,210 125 0.0013
2016-11-08 2016-09-30 13F ADVANCED DRAIN SYS INC DEL COM COM 00790R104 5,210 125
2014-02-12 2013-12-31 13F WMS INDS INC COM COM 929297109 0 -31,794 -100.00 0 -100.00
2013-11-12 2013-09-30 13F WMS INDS INC COM COM 929297109 31,794 -168,892 -84.16 825 -83.89 0.0034
2013-08-13 2013-06-30 13F WMS INDS INC COM COM 929297109 200,686 200,686 5,120 0.0250
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.