Waste Management, Inc.
US ˙ NYSE ˙ US94106L1098

SecurityWM / Waste Management, Inc.
InstitutionBrown Advisory Inc
Latest Disclosed Ownership86,679 shares
Latest Disclosed Value $ 19,917,967
Brown Advisory Inc reports 43.25% increase in ownership of WM / Waste Management, Inc.

On May 15, 2026 - Brown Advisory Inc filed a 13F-HR form disclosing ownership of 86,679 shares of Waste Management, Inc. (US:WM) valued at $19,917,967 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 60,509 shares of Waste Management, Inc.. This represents a change in shares of 43.25% during the quarter. The current value of the position is $18,896,022 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 WASTE MGMT INC DEL COM 94106L109 86,679 26,170 43.25 19,918 49.82 0.0146
2026-02-13 2025-12-31 13F WASTE MGMT INC DEL COM 94106L109 60,509 221 0.37 13,294 -0.14 0.0185
2025-11-14 2025-09-30 13F WASTE MGMT INC DEL COM 94106L109 60,288 5,605 10.25 13,313 6.40 0.0173
2025-08-13 2025-06-30 13F WASTE MGMT INC DEL COM 94106L109 54,683 2,432 4.65 12,512 3.44 0.0165
2025-04-30 2025-03-31 13F WASTE MGMT INC DEL COM 94106L109 52,251 679 1.32 12,097 16.24 0.0173
2025-02-14 2024-12-31 13F WASTE MGMT INC DEL COM 94106L109 51,572 -2,427 -4.49 10,407 -7.17 0.0132
2024-11-13 2024-09-30 13F WASTE MGMT INC DEL COM 94106L109 53,999 -9,125 -14.46 11,210 -16.75 0.0141
2024-08-14 2024-06-30 13F WASTE MGMT INC DEL COM 94106L109 63,124 -861 -1.35 13,467 -1.26 0.0176
2024-04-24 2024-03-31 13F WASTE MGMT INC DEL COM 94106L109 63,985 2,274 3.68 13,638 23.40 0.0182
2024-02-08 2023-12-31 13F WASTE MGMT INC DEL COM 94106L109 61,711 -739 -1.18 11,052 16.10 0.0155
2023-10-25 2023-09-30 13F WASTE MGMT INC DEL COM 94106L109 62,450 632 1.02 9,520 -11.20 0.0156
2023-07-31 2023-06-30 13F WASTE MGMT INC DEL COM 94106L109 61,818 7,752 14.34 10,720 21.51 0.0167
2023-05-08 2023-03-31 13F WASTE MGMT INC DEL COM 94106L109 54,066 -479 -0.88 8,822 3.10 0.0149
2023-02-13 2022-12-31 13F WASTE MGMT INC DEL COM 94106L109 54,545 -2,432 -4.27 8,557 -6.26 0.0159
2022-11-14 2022-09-30 13F WASTE MGMT INC DEL COM 94106L109 56,977 1,100 1.97 9,128 6.80 0.0178
2022-11-14 2022-06-30 13F/A-2 WASTE MGMT INC DEL COM 94106L109 55,877 10,873 24.16 8,547 19.82 0.0161
2022-09-13 2022-06-30 13F/A-1 WASTE MGMT INC DEL COM 94106L109 56,703 10,881 8,674 0.0150
2022-08-02 2022-06-30 13F WASTE MGMT INC DEL COM 94106L109 55,484 10,873 8,753 0.0058
2022-11-14 2022-03-31 13F/A-2 WASTE MGMT INC DEL COM 94106L109 45,004 2,201 5.14 7,133 -0.17 0.0106
2022-09-13 2022-03-31 13F/A-1 WASTE MGMT INC DEL COM 94106L109 45,822 3,019 7,262 0.0102
2022-05-09 2022-03-31 13F WASTE MGMT INC DEL COM 94106L109 44,611 1,808 7,231 0.0098
2022-01-27 2021-12-31 13F WASTE MGMT INC DEL COM 94106L109 42,803 -61 -0.14 7,145 11.61 0.0089
2021-11-12 2021-09-30 13F WASTE MGMT INC DEL COM 94106L109 42,864 -137 -0.32 6,402 6.24 0.0094
2021-07-29 2021-06-30 13F WASTE MGMT INC DEL COM 94106L109 43,001 -624 -1.43 6,026 7.07 0.0091
2021-05-14 2021-03-31 13F WASTE MGMT INC DEL COM 94106L109 43,625 932 2.18 5,628 11.78 0.0096
2021-02-12 2020-12-31 13F WASTE MGMT INC DEL COM 94106L109 42,693 3,228 8.18 5,035 12.72 0.0089
2020-11-16 2020-09-30 13F WASTE MGMT INC DEL COM 94106L109 39,465 -2,669 -6.33 4,467 0.09 0.0092
2020-08-14 2020-06-30 13F WASTE MGMT INC DEL COM 94106L109 42,134 -23 -0.05 4,463 14.38 0.0104
2020-05-15 2020-03-31 13F WASTE MGMT INC DEL COM 94106L109 42,157 -1,764 -4.02 3,902 -22.05 0.0120
2020-02-14 2019-12-31 13F WASTE MGMT INC DEL COM 94106L109 43,921 367 0.84 5,006 -0.06 0.0127
2019-11-14 2019-09-30 13F WASTE MGMT INC DEL COM 94106L109 43,554 388 0.90 5,009 0.56 0.0141
2019-08-12 2019-06-30 13F WASTE MGMT INC DEL COM 94106L109 43,166 -7,600 -14.97 4,981 -5.56 0.0143
2019-05-15 2019-03-31 13F WASTE MGMT INC DEL COM 94106L109 50,766 8,746 20.81 5,274 41.05 0.0150
2019-02-13 2018-12-31 13F WASTE MGMT INC DEL COM 94106L109 42,020 -836 -1.95 3,739 -3.46 0.0126
2018-11-13 2018-09-30 13F WASTE MGMT INC DEL COM 94106L109 42,856 5,049 13.35 3,873 25.95 0.0110
2018-08-10 2018-06-30 13F WASTE MGMT INC DEL COM 94106L109 37,807 702 1.89 3,075 -1.47 0.0095
2018-06-28 2018-03-31 13F/A-1 WASTE MGMT INC DEL COM 94106L109 37,105 -3,470 -8.55 3,121 -10.88 0.0101
2018-05-14 2018-03-31 13F WASTE MGMT INC DEL COM 94106L109 31,933 -8,642 2,686
2018-02-12 2017-12-31 13F WASTE MGMT INC DEL COM 94106L109 40,575 3,000 7.98 3,502 19.03 0.0111
2017-11-13 2017-09-30 13F WASTE MGMT INC DEL COM 94106L109 37,575 2,814 8.10 2,942 15.42 0.0098
2017-08-14 2017-06-30 13F WASTE MGMT INC DEL COM 94106L109 34,761 -7,606 -17.95 2,549 -17.51 0.0078
2017-05-15 2017-03-31 13F WASTE MGMT INC DEL COM 94106L109 42,367 -1,712 -3.88 3,090 -1.09 0.0105
2017-02-13 2016-12-31 13F WASTE MGMT INC DEL COM 94106L109 44,079 -4,260 -8.81 3,124 1.40 0.0112
2016-11-14 2016-09-30 13F WASTE MGMT INC DEL COM 94106L109 48,339 6,736 16.19 3,081 11.71 0.0106
2016-08-09 2016-06-30 13F WASTE MGMT INC DEL COM 94106L109 41,603 3,918 10.40 2,758 24.07 0.0097
2016-05-13 2016-03-31 13F WASTE MGMT INC DEL COM 94106L109 37,685 2,568 7.31 2,223 18.62 0.0077
2016-02-08 2015-12-31 13F WASTE MGMT INC DEL COM 94106L109 35,117 62 0.18 1,874 7.33 0.0064
2015-11-13 2015-09-30 13F WASTE MGMT INC DEL COM 94106L109 35,055 14,162 67.78 1,746 80.19 0.0062
2015-08-11 2015-06-30 13F WASTE MGMT INC DEL COM 94106L109 20,893 462 2.26 969 -12.55 0.0032
2015-05-14 2015-03-31 13F WASTE MGMT INC DEL COM 94106L109 20,431 -8,916 -30.38 1,108 -26.43 0.0035
2015-02-13 2014-12-31 13F/A-1 WASTE MGMT INC DEL COM 94106L109 29,347 5,077 20.92 1,506 30.50 0.0047
2015-02-09 2014-12-31 13F WASTE MGMT INC DEL COM 94106L109 29,347 1,464
2014-11-10 2014-09-30 13F WASTE MGMT INC DEL COM 94106L109 24,270 1,790 7.96 1,154 14.71 0.0037
2014-08-08 2014-06-30 13F WASTE MGMT INC DEL COM 94106L109 22,480 5,031 28.83 1,006 37.06 0.0032
2014-05-13 2014-03-31 13F WASTE MGMT INC DEL COM 94106L109 17,449 10,837 163.90 734 147.14 0.0023
2014-02-11 2013-12-31 13F WASTE MGMT INC DEL COM 94106L109 6,612 6,612 -38.76 297 -31.88 0.0010
2013-11-08 2013-09-30 13F WASTE MGMT INC DEL COM 94106L109 0 -10,796 -100.00 0 -100.00
2013-08-13 2013-06-30 13F WASTE MGMT INC DEL COM 94106L109 10,796 10,796 436 0.0017
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.