Microsoft Corporation
MX ˙ BMV ˙ US5949181045
SecurityMX:MSFT / Microsoft Corporation
InstitutionTower Bridge Advisors
Latest Disclosed Ownership143,677 shares
Latest Disclosed Value $ 53,184,862
Tower Bridge Advisors reports 1.33% increase in ownership of MSFT / Microsoft Corporation

On May 12, 2026 - Tower Bridge Advisors filed a 13F-HR form disclosing ownership of 143,677 shares of Microsoft Corporation (MX:MSFT) valued at $53,184,862 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 141,786 shares of Microsoft Corporation. This represents a change in shares of 1.33% 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)
2026-05-12 2026-03-31 13F Microsoft Common 594918104 143,677 1,891 1.33 53,185 -22.44 3.7293
2026-02-13 2025-12-31 13F MICROSOFT COMMON 594918104 141,786 -8,487 -5.65 68,570 -11.90 6.9251
2025-11-12 2025-09-30 13F MICROSOFT COMMON 594918104 150,273 -2,519 -1.65 77,834 2.41 7.7732
2025-08-11 2025-06-30 13F MICROSOFT COMMON 594918104 152,792 -3,797 -2.42 76,000 29.29 8.1700
2025-05-08 2025-03-31 13F MICROSOFT COMMON 594918104 156,589 -4,241 -2.64 58,782 -13.29 6.5679
2025-02-05 2024-12-31 13F MICROSOFT COMMON 594918104 160,830 -3,558 -2.16 67,790 -4.17 7.2192
2024-11-06 2024-09-30 13F MICROSOFT COMMON 594918104 164,388 445 0.27 70,736 -3.46 7.3404
2024-07-24 2024-06-30 13F MICROSOFT COMMON 594918104 163,943 -10,617 -6.08 73,274 -0.23 8.1439
2024-04-29 2024-03-31 13F MICROSOFT COMMON 594918104 174,560 -38,510 -18.07 73,441 -8.34 7.4748
2024-02-14 2023-12-31 13F MICROSOFT COMMON 594918104 213,070 -5,808 -2.65 80,123 15.93 6.8919
2023-11-01 2023-09-30 13F MICROSOFT COMMON 594918104 218,878 -267 -0.12 69,111 -7.39 6.3969
2023-07-20 2023-06-30 13F MICROSOFT COM 594918104 219,145 -36,319 -14.22 74,628 1.33 6.8409
2023-04-26 2023-03-31 13F MICROSOFT COMMON 594918104 255,464 -4,421 -1.70 73,650 18.17 6.0306
2023-01-27 2022-12-31 13F MICROSOFT COMMON 594918104 259,885 -3,286 -1.25 62,326 1.69 5.1764
2022-11-14 2022-09-30 13F MICROSOFT COMMON 594918104 263,171 -2,041 -0.77 61,292 -10.02 5.4463
2022-07-21 2022-06-30 13F MICROSOFT COMMON 594918104 265,212 -6,163 -2.27 68,114 -18.59 5.5553
2022-05-05 2022-03-31 13F MICROSOFT COMMON 594918104 271,375 -5,683 -2.05 83,668 -10.21 5.5925
2022-02-09 2021-12-31 13F MICROSOFT COMMON 594918104 277,058 -2,180 -0.78 93,180 18.37 5.7213
2021-10-28 2021-09-30 13F MICROSOFT COMMON 594918104 279,238 865 0.31 78,723 4.39 5.2518
2021-08-10 2021-06-30 13F MICROSOFT COMMON 594918104 278,373 565 0.20 75,411 15.13 5.0264
2021-05-12 2021-03-31 13F MICROSOFT COMMON 594918104 277,808 -2,236 -0.80 65,499 5.16 4.9310
2021-02-11 2020-12-31 13F MICROSOFT COMMON 594918104 280,044 30,600 12.27 62,287 18.72 5.0731
2020-11-13 2020-09-30 13F MICROSOFT COMMON 594918104 249,444 -11,647 -4.46 52,466 -1.26 5.3603
2020-07-22 2020-06-30 13F MICROSOFT COMMON 594918104 261,091 -1,951 -0.74 53,135 28.08 5.9579
2020-04-27 2020-03-31 13F MICROSOFT COMMON 594918104 263,042 2,850 1.10 41,484 1.10 5.4453
2020-02-05 2019-12-31 13F MICROSOFT COMMON 594918104 260,192 -3,004 -1.14 41,032 6.81 4.3344
2019-11-12 2019-09-30 13F MICROSOFT COMMON 594918104 263,196 -2,695 -1.01 38,416 7.86 4.2062
2019-08-06 2019-06-30 13F MICROSOFT COMMON 594918104 265,891 2,661 1.01 35,619 14.73 3.9844
2019-04-30 2019-03-31 13F MICROSOFT COMMON 594918104 263,230 -15,908 -5.70 31,045 9.50 3.6036
2019-02-07 2018-12-31 13F MICROSOFT COMMON 594918104 279,138 -11,057 -3.81 28,352 -14.57 3.6526
2018-10-23 2018-09-30 13F MICROSOFT COMMON 594918104 290,195 -889 -0.31 33,190 15.63 3.4673
2018-08-09 2018-06-30 13F MICROSOFT COMMON 594918104 291,084 -9,465 -3.15 28,704 4.64 3.2011
2018-05-02 2018-03-31 13F MICROSOFT COMMON 594918104 300,549 -12,903 -4.12 27,431 2.31 3.0416
2018-01-30 2017-12-31 13F MICROSOFT COMMON 594918104 313,452 -13,379 -4.09 26,813 10.13 2.8759
2017-11-06 2017-09-30 13F MICROSOFT COMMON 594918104 326,831 -6,795 -2.04 24,346 5.87 2.7667
2017-07-26 2017-06-30 13F MICROSOFT COMMON 594918104 333,626 -9,675 -2.82 22,997 1.71 2.6365
2017-05-02 2017-03-31 13F MICROSOFT COMMON 594918104 343,301 -5,931 -1.70 22,610 4.18 2.6399
2017-01-31 2016-12-31 13F MICROSOFT COMMON 594918104 349,232 -10,913 -3.03 21,701 4.61 2.6303
2016-10-27 2016-09-30 13F MICROSOFT COMMON 594918104 360,145 5,773 1.63 20,744 14.40 2.5258
2016-08-12 2016-06-30 13F MICROSOFT COMMON 594918104 354,372 45,640 14.78 18,133 6.35 2.2590
2016-05-12 2016-03-31 13F MICROSOFT COMMON 594918104 308,732 7,317 2.43 17,051 1.97 2.1297
2016-02-02 2015-12-31 13F MICROSOFT COMMON 594918104 301,415 12,498 4.33 16,723 30.77 2.1785
2015-11-13 2015-09-30 13F/A-1 MICROSOFT COMMON 594918104 288,917 13,068 4.74 12,787 5.00 1.7597
2015-11-12 2015-09-30 13F MICROSOFT COMMON 594918104 275,849 12,179
2015-08-13 2015-06-30 13F MICROSOFT COMMON 594918104 275,849 7,075 2.63 12,179 11.45 1.5405
2015-05-14 2015-03-31 13F MICROSOFT COMMON 594918104 268,774 16,711 6.63 10,927 -6.67 1.3843
2015-02-19 2014-12-31 13F MICROSOFT COMMON 594918104 252,063 -701 -0.28 11,708 -0.09 1.4396
2014-11-12 2014-09-30 13F MICROSOFT COMMON 594918104 252,764 -3,949 -1.54 11,718 9.47 1.4781
2014-08-26 2014-06-30 13F MICROSOFT COMMON 594918104 256,713 76,573 42.51 10,705 44.98 1.3201
2014-05-08 2014-03-31 13F MICROSOFT COMMON 594918104 180,140 15,471 9.40 7,384 19.85 0.9488
2014-02-10 2013-12-31 13F MICROSOFT COMMON 594918104 164,669 756 0.46 6,160 12.92 0.8087
2013-11-05 2013-09-30 13F MICROSOFT COMMON 594918104 163,913 -3,007 -1.80 5,455 -5.39 0.7825
2013-07-24 2013-06-30 13F MICROSOFT COMMON 594918104 166,920 166,920 5,766 0.8547
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.