Microsoft Corporation
MX ˙ BMV ˙ US5949181045
SecurityMX:MSFT / Microsoft Corporation
InstitutionHarbor Advisory Corp /ma/
Latest Disclosed Ownership22,020 shares
Latest Disclosed Value $ 8,151,324
Harbor Advisory Corp /ma/ reports 34.67% increase in ownership of MSFT / Microsoft Corporation

On May 7, 2026 - Harbor Advisory Corp /ma/ filed a 13F-HR form disclosing ownership of 22,020 shares of Microsoft Corporation (MX:MSFT) valued at $8,151,324 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 16,351 shares of Microsoft Corporation. This represents a change in shares of 34.67% 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)
2026-05-07 2026-03-31 13F MICROSOFT COM 594918104 22,020 5,669 34.67 8,151 3.09 2.4495
2026-02-06 2025-12-31 13F MICROSOFT COM 594918104 16,351 -974 -5.62 7,908 -11.88 2.3922
2025-11-12 2025-09-30 13F MICROSOFT COM 594918104 17,325 -76 -0.44 8,974 3.67 2.6538
2025-08-12 2025-06-30 13F MICROSOFT COM 594918104 17,401 1,088 6.67 8,656 41.35 2.7580
2025-05-13 2025-03-31 13F MICROSOFT COM 594918104 16,313 73 0.45 6,124 -10.55 2.0556
2025-01-29 2024-12-31 13F MICROSOFT COM 594918104 16,240 548 3.49 6,845 1.38 2.2485
2024-10-21 2024-09-30 13F MICROSOFT COM 594918104 15,692 239 1.55 6,752 -2.23 2.2040
2024-07-25 2024-06-30 13F MICROSOFT COM 594918104 15,453 1,076 7.48 6,907 14.19 2.3854
2024-04-29 2024-03-31 13F MICROSOFT COM 594918104 14,377 -297 -2.02 6,049 9.60 2.0590
2024-02-05 2023-12-31 13F MICROSOFT COM 594918104 14,674 -1,333 -8.33 5,518 9.18 1.9757
2023-10-27 2023-09-30 13F MICROSOFT COM 594918104 16,007 -599 -3.61 5,054 -10.63 1.8317
2023-08-03 2023-06-30 13F MICROSOFT COM 594918104 16,606 136 0.83 5,655 19.10 1.9965
2023-05-04 2023-03-31 13F MICROSOFT COM 594918104 16,470 132 0.81 4,748 21.18 1.8130
2023-02-07 2022-12-31 13F MICROSOFT COM 594918104 16,338 -748 -4.38 3,918 -1.53 1.6007
2022-10-31 2022-09-30 13F MICROSOFT COM 594918104 17,086 -597 -3.38 3,979 -12.40 1.8324
2022-08-01 2022-06-30 13F MICROSOFT COM 594918104 17,683 1,969 12.53 4,542 -6.25 1.9904
2022-05-13 2022-03-31 13F MICROSOFT COM 594918104 15,714 5,036 47.16 4,845 34.92 1.9443
2022-02-07 2021-12-31 13F MICROSOFT COM 594918104 10,678 399 3.88 3,591 23.91 1.4565
2021-11-12 2021-09-30 13F MICROSOFT COM 594918104 10,279 700 7.31 2,898 11.68 1.2573
2021-08-04 2021-06-30 13F MICROSOFT COM 594918104 9,579 0 0.00 2,595 14.92 1.1699
2021-05-13 2021-03-31 13F MICROSOFT COM 594918104 9,579 285 3.07 2,258 9.24 0.8976
2021-02-16 2020-12-31 13F MICROSOFT COM 594918104 9,294 7,780 513.87 2,067 550.00 1.0941
2020-10-26 2020-09-30 13F MICROSOFT COM 594918104 1,514 -25 -1.62 318 1.60 0.3118
2020-08-04 2020-06-30 13F MICROSOFT COM 594918104 1,539 0 0.00 313 28.81 0.3171
2020-04-28 2020-03-31 13F MICROSOFT COM 594918104 1,539 0 0.00 243 0.00 0.2606
2020-02-05 2019-12-31 13F MICROSOFT COM 594918104 1,539 0 0.00 243 13.55 0.2022
2019-10-28 2019-09-30 13F MICROSOFT COM 594918104 1,539 0 0.00 214 3.88 0.1868
2019-07-30 2019-06-30 13F MICROSOFT COM 594918104 1,539 -240 -13.49 206 -1.90 0.1819
2019-04-23 2019-03-31 13F MICROSOFT COM 594918104 1,779 1,779 210 0.1877
2019-02-05 2018-12-31 13F MICROSOFT COM 594918104 0 -1,779 -100.00 0 -100.00
2018-10-17 2018-09-30 13F MICROSOFT COM 594918104 1,779 1,779 203 0.1758
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.