Microsoft Corporation
BG ˙ BUL ˙ US5949181045
SecurityBG:MSF / Microsoft Corporation
InstitutionRhumbline Advisers
Latest Disclosed Ownership12,999,925 shares
Latest Disclosed Value $ 4,812,182,289
Rhumbline Advisers reports 2.49% decrease in ownership of MSF / Microsoft Corporation

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 12,999,925 shares of Microsoft Corporation (BG:MSF) valued at $4,812,182,289 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 13,331,441 shares of Microsoft Corporation. This represents a change in shares of -2.49% 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 CORP COM COM 594918104 12,999,925 -331,516 -2.49 4,812,182 -25.36 4.1166
2026-02-13 2025-12-31 13F MICROSOFT CORP COM COM 594918104 13,331,441 -500,924 -3.62 6,447,352 -10.01 5.2123
2025-11-06 2025-09-30 13F MICROSOFT CORP COM COM 594918104 13,832,365 -325,308 -2.30 7,164,474 1.74 5.7540
2025-08-12 2025-06-30 13F MICROSOFT CORP COM COM 594918104 14,157,673 -146,242 -1.02 7,042,168 31.15 6.0307
2025-05-29 2025-03-31 13F/A-1 MICROSOFT CORP COM COM 594918104 14,303,915 -8,798 -0.06 5,369,547 -10.99 5.0227
2025-04-08 2025-03-31 13F MICROSOFT CORP COM COM 594918104 14,303,915 -8,798 5,369,547 5.0227
2025-05-29 2024-12-31 13F/A-1 MICROSOFT CORP COM COM 594918104 14,312,713 -197,524 -1.36 6,032,808 -3.38 5.3966
2025-01-30 2024-12-31 13F MICROSOFT CORP COM COM 594918104 14,312,713 -197,524 6,032,808 5.3966
2024-11-12 2024-09-30 13F MICROSOFT CORP COM COM 594918104 14,510,237 -228,719 -1.55 6,243,755 -5.22 5.6325
2024-08-01 2024-06-30 13F MICROSOFT CORP COM COM 594918104 14,738,956 45,220 0.31 6,587,576 6.56 6.1913
2024-05-09 2024-03-31 13F MICROSOFT CORP COM COM 594918104 14,693,736 -16,238 -0.11 6,181,948 11.76 5.9367
2024-02-08 2023-12-31 13F MICROSOFT CORP COM COM 594918104 14,709,974 -93,393 -0.63 5,531,539 18.34 5.7977
2023-11-09 2023-09-30 13F MICROSOFT CORP COM COM 594918104 14,803,367 31,821 0.22 4,674,163 -7.08 5.4256
2023-08-08 2023-06-30 13F MICROSOFT CORP COM COM 594918104 14,771,546 191,828 1.32 5,030,302 119,583.61 5.6345
2023-05-11 2023-03-31 13F MICROSOFT CORP COM COM 594918104 14,579,718 617,053 4.42 4,203 -99.87 5.1861
2023-02-14 2022-12-31 13F MICROSOFT CORP COM COM 594918104 13,962,665 586,449 4.38 3,348,526 7.49 4.5014
2022-11-10 2022-09-30 13F MICROSOFT CORP COM COM 594918104 13,376,216 551,801 4.30 3,115,321 -5.42 4.6406
2022-08-11 2022-06-30 13F MICROSOFT CORP COM COM 594918104 12,824,415 383,796 3.09 3,293,695 -14.13 4.8064
2022-05-12 2022-03-31 13F MICROSOFT CORP COM COM 594918104 12,440,619 152,444 1.24 3,835,567 -7.19 4.9370
2022-02-10 2021-12-31 13F MICROSOFT CORP COM COM 594918104 12,288,175 201,436 1.67 4,132,759 21.28 5.0651
2021-11-12 2021-09-30 13F MICROSOFT CORP COM COM 594918104 12,086,739 -307,025 -2.48 3,407,493 1.49 4.6117
2021-08-05 2021-06-30 13F MICROSOFT CORP COM COM 594918104 12,393,764 -639,795 -4.91 3,357,471 9.26 4.4057
2021-05-06 2021-03-31 13F MICROSOFT CORP COM COM 594918104 13,033,559 -742,540 -5.39 3,072,922 0.29 4.1750
2021-02-10 2020-12-31 13F MICROSOFT CORP COM COM 594918104 13,776,099 -340,547 -2.41 3,064,080 3.20 4.2290
2020-11-12 2020-09-30 13F MICROSOFT CORP COM COM 594918104 14,116,646 -53,556 -0.38 2,969,154 2.96 4.6526
2020-08-13 2020-06-30 13F MICROSOFT CORP COM COM 594918104 14,170,202 655,912 4.85 2,883,778 35.30 4.8156
2020-05-06 2020-03-31 13F MICROSOFT CORP COM COM 594918104 13,514,290 58,268 0.43 2,131,339 0.44 4.4667
2020-02-05 2019-12-31 13F MICROSOFT CORP COM COM 594918104 13,456,022 -100,265 -0.74 2,122,015 12.59 3.5489
2019-10-23 2019-09-30 13F MICROSOFT CORP COM COM 594918104 13,556,287 275,399 2.07 1,884,731 5.94 3.4440
2019-08-14 2019-06-30 13F MICROSOFT CORP COM COM 594918104 13,280,888 -184,339 -1.37 1,779,108 12.03 3.3398
2019-05-01 2019-03-31 13F MICROSOFT CORP COM COM 594918104 13,465,227 563,056 4.36 1,588,089 21.18 3.0753
2019-01-31 2018-12-31 13F MICROSOFT CORP COM COM 594918104 12,902,171 76,690 0.60 1,310,474 -10.66 2.8516
2018-11-07 2018-09-30 13F MICROSOFT CORP COM COM 594918104 12,825,481 -248,549 -1.90 1,466,850 13.78 2.8330
2018-08-06 2018-06-30 13F MICROSOFT CORP COM COM 594918104 13,074,030 300,088 2.35 1,289,230 10.58 2.6002
2018-05-02 2018-03-31 13F MICROSOFT CORP COM COM 594918104 12,773,942 -215,939 -1.66 1,165,878 4.92 2.4351
2018-02-09 2017-12-31 13F MICROSOFT CORP COM COM 594918104 12,989,881 283,852 2.23 1,111,154 17.40 2.2568
2017-11-06 2017-09-30 13F MICROSOFT CORP COM COM 594918104 12,706,029 124,569 0.99 946,472 9.14 2.0579
2017-08-02 2017-06-30 13F MICROSOFT CORP COM COM 594918104 12,581,460 112,627 0.90 867,240 5.61 1.9795
2017-05-02 2017-03-31 13F MICROSOFT CORP COM COM 594918104 12,468,833 125,079 1.01 821,197 7.06 1.9182
2017-01-27 2016-12-31 13F MICROSOFT CORP COM COM 594918104 12,343,754 304,710 2.53 767,041 10.61 1.9439
2016-11-08 2016-09-30 13F MICROSOFT CORP COM COM 594918104 12,039,044 447,772 3.86 693,449 16.91 1.9108
2016-08-11 2016-06-30 13F MICROSOFT CORP COM COM 594918104 11,591,272 93,903 0.82 593,125 -6.59 1.7574
2016-05-02 2016-03-31 13F MICROSOFT CORP US COM 594918104 11,497,369 184,171 1.63 635,000 1.17 1.9703
2016-02-03 2015-12-31 13F MICROSOFT CORP US COM 594918104 11,313,198 -38,103 -0.34 627,656 24.93 2.0197
2015-11-04 2015-09-30 13F MICROSOFT CORP US COM 594918104 11,351,301 54,265 0.48 502,409 0.73 1.7092
2015-08-04 2015-06-30 13F MICROSOFT CORP US COM 594918104 11,297,036 -2,208,554 -16.35 498,764 -9.16 1.5897
2015-05-12 2015-03-31 13F MICROSOFT CORP US COM 594918104 13,505,590 -197,015 -1.44 549,070 -13.73 1.5839
2015-02-06 2014-12-31 13F MICROSOFT CORP US COM 594918104 13,702,605 -250,136 -1.79 636,486 -1.60 1.8490
2014-11-12 2014-09-30 13F MICROSOFT CORP US COM 594918104 13,952,741 242,975 1.77 646,849 13.15 1.9430
2014-08-06 2014-06-30 13F MICROSOFT CORP US COM 594918104 13,709,766 -776,704 -5.36 571,697 -3.72 1.6778
2014-05-06 2014-03-31 13F MICROSOFT CORP US COM 594918104 14,486,470 -203,739 -1.39 593,800 7.99 1.7613
2014-02-03 2013-12-31 13F MICROSOFT CORP US COM 594918104 14,690,209 -437,482 -2.89 549,855 9.12 1.6220
2013-11-05 2013-09-30 13F MICROSOFT CORP US COM 594918104 15,127,691 -362,510 -2.34 503,903 -5.79 1.5614
2013-08-07 2013-06-30 13F MICROSOFT CORP US COM 594918104 15,490,201 15,490,201 534,877 1.7187
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.