Microsoft Corporation
MX ˙ BMV ˙ US5949181045
SecurityMX:MSFT / Microsoft Corporation
InstitutionFactory Mutual Insurance Co
Latest Disclosed Ownership972,568 shares
Latest Disclosed Value $ 360,015,497
Factory Mutual Insurance Co reports 3.59% decrease in ownership of MSFT / Microsoft Corporation

On May 5, 2026 - Factory Mutual Insurance Co filed a 13F-HR form disclosing ownership of 972,568 shares of Microsoft Corporation (MX:MSFT) valued at $360,015,497 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 1,008,818 shares of Microsoft Corporation. This represents a change in shares of -3.59% 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)
2026-05-05 2026-03-31 13F MICROSOFT COM 594918104 972,568 -36,250 -3.59 360,015 -26.21 4.0503
2026-01-23 2025-12-31 13F MICROSOFT COM 594918104 1,008,818 -42,150 -4.01 487,885 -10.37 4.9461
2025-11-10 2025-09-30 13F MICROSOFT COM 594918104 1,050,968 -16,300 -1.53 544,349 2.54 5.3012
2025-08-07 2025-06-30 13F MICROSOFT COM 594918104 1,067,268 -22,500 -2.06 530,870 29.77 5.8025
2025-04-17 2025-03-31 13F MICROSOFT COM 594918104 1,089,768 -13,400 -1.21 409,088 -12.02 4.7457
2025-01-24 2024-12-31 13F MICROSOFT COM 594918104 1,103,168 -11,800 -1.06 464,985 -3.08 5.0279
2024-10-10 2024-09-30 13F MICROSOFT COM 594918104 1,114,968 9,470 0.86 479,771 -2.90 4.9621
2024-07-23 2024-06-30 13F MICROSOFT COM 594918104 1,105,498 -8,900 -0.80 494,102 5.39 5.6288
2024-04-12 2024-03-31 13F MICROSOFT COM 594918104 1,114,398 -31,700 -2.77 468,850 8.79 5.3855
2024-01-23 2023-12-31 13F MICROSOFT COM 594918104 1,146,098 10,000 0.88 430,979 20.14 5.3527
2023-11-07 2023-09-30 13F MICROSOFT COM 594918104 1,136,098 -23,294 -2.01 358,723 -9.14 5.0039
2023-07-27 2023-06-30 13F MICROSOFT COM 594918104 1,159,392 -40,100 -3.34 394,819 14.17 5.8240
2023-05-08 2023-03-31 13F MICROSOFT COM 594918104 1,199,492 -120,400 -9.12 345,814 9.25 5.4046
2023-02-02 2022-12-31 13F MICROSOFT COM 594918104 1,319,892 13,429 1.03 316,536 4.03 4.7871
2022-11-04 2022-09-30 13F MICROSOFT COM 594918104 1,306,463 -4,237 -0.32 304,275 -9.61 4.9957
2022-08-08 2022-06-30 13F MICROSOFT COM 594918104 1,310,700 -23,200 -1.74 336,627 -18.15 5.5185
2022-05-13 2022-03-31 13F MICROSOFT COM 594918104 1,333,900 -40,800 -2.97 411,255 6.16 5.5614
2022-02-10 2021-12-31 13F MICROSOFT COM 594918104 1,374,700 -303,042 -18.06 387,391 -18.10 5.5930
2021-11-12 2021-09-30 13F MICROSOFT COM 594918104 1,677,742 -38,500 -2.24 472,990 1.73 5.9077
2021-07-14 2021-06-30 13F MICROSOFT COM 594918104 1,716,242 -62,473 -3.51 464,929 10.86 5.6864
2021-05-10 2021-03-31 13F MICROSOFT COM 594918104 1,778,715 -27,885 -1.54 419,368 4.37 5.3651
2021-02-17 2020-12-31 13F MICROSOFT COM 594918104 1,806,600 -155,900 -7.94 401,824 -2.65 5.4321
2020-10-19 2020-09-30 13F MICROSOFT COM 594918104 1,962,500 -59,300 -2.93 412,773 0.32 6.6804
2020-07-13 2020-06-30 13F MICROSOFT COM 594918104 2,021,800 -208,100 -9.33 411,457 17.00 7.0561
2020-04-16 2020-03-31 13F MICROSOFT COM 594918104 2,229,900 -77,800 -3.37 351,678 -3.36 6.6785
2020-01-28 2019-12-31 13F MICROSOFT COM 594918104 2,307,700 -156,300 -6.34 363,924 6.23 5.3660
2019-10-22 2019-09-30 13F MICROSOFT COM 594918104 2,464,000 -252,200 -9.29 342,570 -5.85 5.2962
2019-07-16 2019-06-30 13F MICROSOFT COM 594918104 2,716,200 -96,300 -3.42 363,862 8.01 4.3504
2019-04-09 2019-03-31 13F MICROSOFT COM 594918104 2,812,500 -195,000 -6.48 336,881 10.28 3.9781
2019-01-14 2018-12-31 13F MICROSOFT COM 594918104 3,007,500 0 0.00 305,472 -11.19 3.9194
2018-10-10 2018-09-30 13F MICROSOFT COM 594918104 3,007,500 93,000 3.19 343,968 19.68 3.5706
2018-07-19 2018-06-30 13F MICROSOFT COM 594918104 2,914,500 48,300 1.69 287,399 9.86 3.0838
2018-04-05 2018-03-31 13F MICROSOFT COM 594918104 2,866,200 409,500 16.67 261,598 24.48 2.8649
2018-01-16 2017-12-31 13F MICROSOFT COM 594918104 2,456,700 66,800 2.80 210,146 18.04 2.1983
2017-10-11 2017-09-30 13F MICROSOFT COM 594918104 2,389,900 54,000 2.31 178,024 10.56 1.9517
2017-07-10 2017-06-30 13F MICROSOFT COM 594918104 2,335,900 0 0.00 161,014 4.66 1.8623
2017-04-21 2017-03-31 13F MICROSOFT COM 594918104 2,335,900 0 0.00 153,843 5.70 1.8222
2017-01-19 2016-12-31 13F MICROSOFT COM 594918104 2,335,900 0 0.00 145,550 8.18 1.7272
2016-10-26 2016-09-30 13F MICROSOFT COM 594918104 2,335,900 0 0.00 134,548 12.57 1.6638
2016-07-12 2016-06-30 13F MICROSOFT COM 594918104 2,335,900 0 0.00 119,528 -7.35 1.5747
2016-04-27 2016-03-31 13F MICROSOFT COM 594918104 2,335,900 -10,000 -0.43 129,012 -0.88 1.6695
2016-01-14 2015-12-31 13F MICROSOFT COM 594918104 2,345,900 0 0.00 130,151 25.35 1.7507
2015-10-14 2015-09-30 13F MICROSOFT COM 594918104 2,345,900 0 0.00 103,830 0.25 1.4203
2015-07-21 2015-06-30 13F MICROSOFT COM 594918104 2,345,900 0 0.00 103,571 8.60 1.3528
2015-04-13 2015-03-31 13F MICROSOFT COM 594918104 2,345,900 -20,000 -0.85 95,372 -13.22 1.2565
2015-01-12 2014-12-31 13F MICROSOFT COM 594918104 2,365,900 0 0.00 109,896 0.19 1.4810
2014-11-04 2014-09-30 13F MICROSOFT COM 594918104 2,365,900 -8,500 -0.36 109,683 10.78 1.5169
2014-08-12 2014-06-30 13F MICROSOFT COM 594918104 2,374,400 311,000 15.07 99,012 17.06 1.3538
2014-05-15 2014-03-31 13F MICROSOFT COM 594918104 2,063,400 0 0.00 84,579 9.57 1.2244
2014-02-04 2013-12-31 13F MICROSOFT COM 594918104 2,063,400 0 0.00 77,192 12.41 1.1352
2013-10-16 2013-09-30 13F MICROSOFT COM 594918104 2,063,400 -200,000 -8.84 68,670 -12.17 1.0890
2013-07-25 2013-06-30 13F MICROSOFT COM 594918104 2,263,400 2,263,400 78,189 1.2814
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.