Advanced Drainage Systems, Inc.
MX ˙ BMV ˙ US00790R1041
SecurityMX:WMS / Advanced Drainage Systems, Inc.
InstitutionWellington Management Group Llp
Latest Disclosed Ownership3,045,630 shares
Ownership 4.38%
Wellington Management Group Llp ownership in WMS / Advanced Drainage Systems, Inc.

2020-11-10 - Wellington Management Group Llp has filed an SC 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 3,045,630 shares of Advanced Drainage Systems, Inc. (MX:WMS). This represents 4.38 percent ownership of the company. In their previous filing dated 2020-01-08 , Wellington Management Group Llp had reported owning 6,598,428 shares, indicating a decrease of -53.84 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2020-11-10 2020-11-10 13G/A 6,598,428 3,045,630 -53.84 4.38 -54.66
2020-01-08 2020-01-08 13G/A 6,999,475 6,598,428 -5.73 9.66 -5.94
2019-10-10 2019-10-10 13G/A 5,080,591 6,999,475 37.77 10.27 15.52
2019-02-12 2019-02-12 13G/A 5,046,879 5,080,591 0.67 8.89 -1.44
2018-02-08 2018-02-08 13G/A 6,559,680 5,046,879 -23.06 9.02 -24.20
2017-02-09 2017-02-09 13G/A 5,708,024 6,559,680 14.92 11.90 13.55
2016-06-10 2016-06-10 13G/A 4,714,406 5,708,024 21.08 10.48 18.42
2016-02-11 2016-02-11 13G 4,714,406 8.85

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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 1,063,231 -200,925 -15.89 145,801 -20.37 0.0039
2026-02-17 2025-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 1,264,156 75,250 6.33 183,088 11.03 0.0321
2025-11-14 2025-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 1,188,906 832,929 233.98 164,901 303.31 0.0289
2025-08-14 2025-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 355,977 16,607 4.89 40,888 10.89 0.0074
2025-05-13 2025-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 339,370 111 0.03 36,873 -5.98 0.0071
2025-02-12 2024-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 339,259 -18,652 -5.21 39,218 -30.28 0.0072
2024-11-14 2024-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 357,911 -80,199 -18.31 56,249 -19.95 0.0099
2024-08-14 2024-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 438,110 -4,095 -0.93 70,268 -7.74 0.0125
2024-05-15 2024-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 442,205 -125,299 -22.08 76,165 -4.57 0.0135
2024-02-12 2023-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 567,504 293,924 107.44 79,814 156.30 0.0149
2023-11-14 2023-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 273,580 -5,329 -1.91 31,142 -1.87 0.0062
2023-08-14 2023-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 278,909 -29,423 -9.54 31,734 22.22 0.0060
2023-05-12 2023-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 308,332 20,644 7.18 25,965 10.11 0.0051
2023-02-13 2022-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 287,688 14,139 5.17 23,582 -30.69 0.0047
2022-11-14 2022-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 273,549 -80,872 -22.82 34,022 6.58 0.0072
2022-08-15 2022-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 354,421 15,205 4.48 31,923 -20.79 0.0064
2022-05-16 2022-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 339,216 21,574 6.79 40,302 -6.80 0.0069
2022-02-11 2021-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 317,642 14,375 4.74 43,241 31.81 0.0069
2021-11-15 2021-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 303,267 28,031 10.18 32,805 2.25 0.0056
2021-08-16 2021-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 275,236 19,860 7.78 32,084 21.51 0.0053
2021-05-17 2021-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 255,376 -1,462,649 -85.14 26,404 -81.61 0.0047
2021-02-12 2020-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 1,718,025 -2,454,841 -58.83 143,593 -44.89 0.0264
2020-11-16 2020-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 4,172,866 -816,836 -16.37 260,554 5.71 0.0539
2020-08-14 2020-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 4,989,702 -676,452 -11.94 246,491 47.77 0.0549
2020-05-14 2020-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 5,666,154 -932,274 -14.13 166,812 -34.91 0.0441
2020-02-11 2019-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 6,598,428 -401,047 -5.73 256,283 13.46 0.0537
2019-11-13 2019-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 6,999,475 1,575,848 29.06 225,874 27.01 0.0509
2019-08-14 2019-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 5,423,627 20,917 0.39 177,841 27.73 0.0394
2019-05-15 2019-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 5,402,710 322,119 6.34 139,228 13.01 0.0315
2019-02-14 2018-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 5,080,591 30,163 0.60 123,205 -21.05 0.0308
2018-11-14 2018-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 5,050,428 -18,466 -0.36 156,059 7.84 0.0329
2018-08-14 2018-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 5,068,894 121,811 2.46 144,718 12.95 0.0322
2018-05-15 2018-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 4,947,083 -99,796 -1.98 128,130 6.45 0.0290
2018-02-13 2017-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 5,046,879 -924,696 -15.48 120,367 -0.46 0.0266
2017-11-13 2017-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 5,971,575 -648,874 -9.80 120,924 -9.13 0.0278
2017-08-14 2017-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 6,620,449 -610,429 -8.44 133,070 -15.97 0.0313
2017-05-11 2017-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 7,230,878 671,198 10.23 158,356 17.19 0.0381
2017-02-14 2016-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 6,559,680 585,023 9.79 135,130 -6.00 0.0339
2016-11-14 2016-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 5,974,657 286,794 5.04 143,751 -7.66 0.0360
2016-08-15 2016-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 5,687,863 1,154,185 25.46 155,676 61.21 0.0402
2016-05-13 2016-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 4,533,678 -180,728 -3.83 96,568 -14.76 0.0254
2016-02-12 2015-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 4,714,406 1,429,633 43.52 113,287 19.21 0.0296
2015-11-16 2015-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 3,284,773 1,186,712 56.56 95,029 54.43 0.0265
2015-08-14 2015-06-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 2,098,061 1,155,515 122.60 61,536 118.06 0.0159
2015-05-15 2015-03-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 942,546 942,546 0.00 28,220 0.0073
2015-02-13 2014-12-31 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 0 -315,554 -100.00 0 -100.00
2014-11-14 2014-09-30 13F ADVANCED DRAIN SYS INC DEL COM 00790R104 315,554 315,554 6,611 0.0018
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.