Microsoft Corporation
CH ˙ SWX ˙ US5949181045
SecurityCH:MSFT / Microsoft Corporation
InstitutionDudley & Shanley, Inc.
Latest Disclosed Ownership10,569 shares
Latest Disclosed Value $ 3,912,327
Dudley & Shanley, Inc. ownership in MSFT / Microsoft Corporation

On April 8, 2026 - Dudley & Shanley, Inc. filed a 13F-HR form disclosing ownership of 10,569 shares of Microsoft Corporation (CH:MSFT) valued at $3,912,327 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 9, 2026 disclosing 10,569 shares of Microsoft Corporation. This represents a change in shares of 0.00% 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)
2026-04-08 2026-03-31 13F Microsoft COM 594918104 10,569 0 0.00 3,912 -23.46 0.6188
2026-01-09 2025-12-31 13F Microsoft COM 594918104 10,569 -285 -2.63 5,111 -9.07 0.8215
2025-10-08 2025-09-30 13F Microsoft COM 594918104 10,854 0 0.00 5,622 4.13 0.9045
2025-07-09 2025-06-30 13F Microsoft COM 594918104 10,854 0 0.00 5,399 32.50 0.8478
2025-04-09 2025-03-31 13F Microsoft COM 594918104 10,854 -700 -6.06 4,074 -16.34 0.6416
2025-01-03 2024-12-31 13F Microsoft COM 594918104 11,554 -30 -0.26 4,870 -2.29 0.7521
2024-12-23 2024-09-30 13F Microsoft COM 594918104 11,584 -240 -2.03 4,985 -5.68 0.7792
2024-07-09 2024-06-30 13F Microsoft COM 594918104 11,824 -10 -0.08 5,285 6.15 0.9082
2024-04-19 2024-03-31 13F Microsoft COM 594918104 11,834 -1,000 -7.79 4,979 3.15 0.8401
2024-01-12 2023-12-31 13F Microsoft COM 594918104 12,834 0 0.00 4,826 19.10 0.8603
2023-10-13 2023-09-30 13F Microsoft COM 594918104 12,834 -200 -1.53 4,052 -8.70 0.7662
2023-07-21 2023-06-30 13F Microsoft COM 594918104 13,034 0 0.00 4,439 18.13 0.8015
2023-04-13 2023-03-31 13F Microsoft COM 594918104 13,034 0 0.00 3,758 20.22 0.7208
2023-01-18 2022-12-31 13F/A-1 Microsoft COM 594918104 13,034 -1,500 -10.32 3,126 -7.68 0.7041
2023-01-13 2022-12-31 13F Microsoft COM 594918104 13,034 -1,500 3 0.6828
2022-10-18 2022-09-30 13F Microsoft COM 594918104 14,534 0 0.00 3,385 -9.32 0.9471
2022-07-14 2022-06-30 13F Microsoft COM 594918104 14,534 -7,425 -33.81 3,733 -44.86 0.8363
2022-04-18 2022-03-31 13F Microsoft COM 594918104 21,959 0 0.00 6,770 -8.33 1.2595
2022-01-18 2021-12-31 13F Microsoft COM 594918104 21,959 0 0.00 7,385 19.29 1.2784
2021-11-05 2021-09-30 13F Microsoft COM 594918104 21,959 0 0.00 6,191 4.07 1.0887
2021-07-12 2021-06-30 13F Microsoft COM 594918104 21,959 -5,000 -18.55 5,949 -6.40 0.9813
2021-04-21 2021-03-31 13F Microsoft COM 594918104 26,959 -10,000 -27.06 6,356 -22.68 1.0968
2021-01-20 2020-12-31 13F Microsoft COM 594918104 36,959 0 0.00 8,220 5.74 1.5128
2020-11-03 2020-09-30 13F Microsoft COM 594918104 36,959 -975 -2.57 7,774 0.70 1.8882
2020-07-21 2020-06-30 13F Microsoft COM 594918104 37,934 0 0.00 7,720 29.03 2.1362
2020-04-20 2020-03-31 13F Microsoft COM 594918104 37,934 300 0.80 5,983 0.81 1.5032
2020-01-17 2019-12-31 13F Microsoft COM 594918104 37,634 0 0.00 5,935 13.44 1.3384
2019-10-15 2019-09-30 13F Microsoft COM 594918104 37,634 -14,530 -27.85 5,232 -25.13 1.2926
2019-07-10 2019-06-30 13F Microsoft COM 594918104 52,164 -30,030 -36.54 6,988 -27.91 1.6865
2019-04-15 2019-03-31 13F Microsoft COM 594918104 82,194 18,200 28.44 9,694 49.14 2.5093
2019-01-15 2018-12-31 13F Microsoft COM 594918104 63,994 8,793 15.93 6,500 2.96 1.6270
2018-10-29 2018-09-30 13F Microsoft COM 594918104 55,201 -30,000 -35.21 6,313 -24.86 1.1945
2018-07-20 2018-06-30 13F Microsoft COM 594918104 85,201 14,040 19.73 8,402 29.36 1.6286
2018-04-25 2018-03-31 13F Microsoft COM 594918104 71,161 71,161 6,495 1.2426
2013-10-16 2013-09-30 13F Microsoft COM 594918104 0 -26,500 -100.00 0 -100.00
2013-07-29 2013-06-30 13F Microsoft COM 594918104 26,500 26,500 915 0.2132
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.