Microsoft Corporation
MX ˙ BMV ˙ US5949181045
SecurityMX:MSFT / Microsoft Corporation
InstitutionFlagship Harbor Advisors, Llc
Latest Disclosed Ownership62,923 shares
Latest Disclosed Value $ 23,291,981
Flagship Harbor Advisors, Llc ownership in MSFT / Microsoft Corporation

On April 28, 2026 - Flagship Harbor Advisors, Llc filed a 13F-HR form disclosing ownership of 62,923 shares of Microsoft Corporation (MX:MSFT) valued at $23,291,981 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 21, 2026 disclosing 57,103 shares of Microsoft Corporation. This represents a change in shares of 10.19% during the quarter.

Flagship Harbor Advisors, Llc has a history of taking positions in derivatives of the underlying security (MSFT) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:MSFT / Microsoft Corporation Historical Put/Call Ratio
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)
2026-04-28 2026-03-31 13F MICROSOFT COM 594918104 62,923 5,820 10.19 23,292 -15.66 1.0243
2026-01-21 2025-12-31 13F MICROSOFT Common Stock 594918104 57,103 -13,347 -18.95 27,617 -24.32 1.3032
2025-11-05 2025-09-30 13F MICROSOFT COM 594918104 70,450 753 1.08 36,490 5.26 1.5875
2025-08-04 2025-06-30 13F MICROSOFT COM 594918104 69,697 -2,862 -3.94 34,668 27.28 1.6420
2025-04-22 2025-03-31 13F MICROSOFT COM 594918104 72,559 4,175 6.11 27,238 -5.50 1.4322
2025-01-21 2024-12-31 13F MICROSOFT COM 594918104 68,384 1,273 1.90 28,824 -0.19 1.5138
2024-10-21 2024-09-30 13F MICROSOFT COM 594918104 67,111 -337 -0.50 28,878 -4.21 1.5859
2025-12-02 2024-06-30 13F MICROSOFT COM 594918104 67,448 1,964 3.00 30,145 9.42 1.8120
2024-04-16 2024-03-31 13F MICROSOFT COM 594918104 65,484 -886 -1.33 27,550 10.39 1.7704
2024-01-10 2023-12-31 13F MICROSOFT COM 594918104 66,370 10,382 18.54 24,957 41.18 1.8149
2023-10-17 2023-09-30 13F MICROSOFT COM 594918104 55,988 -448 -0.79 17,678 -8.01 1.4703
2023-07-11 2023-06-30 13F MICROSOFT COM 594918104 56,436 -920 -1.60 19,218 16.23 1.5874
2023-04-12 2023-03-31 13F MICROSOFT COM 594918104 57,356 2,871 5.27 16,536 26.55 1.5575
2023-01-13 2022-12-31 13F MICROSOFT COM 594918104 54,485 -850 -1.54 13,066 1.39 1.3395
2022-10-13 2022-09-30 13F MICROSOFT COM 594918104 55,335 -6 -0.01 12,887 -9.33 1.4946
2022-07-13 2022-06-30 13F MICROSOFT COM 594918104 55,341 878 1.61 14,213 -15.35 1.5965
2022-04-13 2022-03-31 13F MICROSOFT COM 594918104 54,463 440 0.81 16,791 -7.58 1.6179
2022-02-17 2021-12-31 13F/A-1 MICROSOFT COM 594918104 54,023 1,300 2.47 18,169 27.21 1.7194
2022-02-10 2021-12-31 13F MICROSOFT COM 594918104 54,023 1,300 18,169 1.7194
2021-11-01 2021-09-30 13F MICROSOFT COM 594918104 52,723 0 0.00 14,283 0.00 1.5346
2021-07-26 2021-06-30 13F MICROSOFT COM 594918104 52,723 1,208 2.34 14,283 17.59 1.5321
2021-05-03 2021-03-31 13F MICROSOFT COM 594918104 51,515 1,193 2.37 12,146 8.51 1.3789
2021-02-08 2020-12-31 13F MICROSOFT COM 594918104 50,322 1,211 2.47 11,193 8.36 1.3879
2020-10-13 2020-09-30 13F MICROSOFT Common Stock 594918104 49,111 326 0.67 10,329 4.04 1.3947
2020-07-31 2020-06-30 13F MICROSOFT Common Stock 594918104 48,785 1,066 2.23 9,928 31.92 1.4576
2020-05-12 2020-03-31 13F MICROSOFT Common Stock 594918104 47,719 1,398 3.02 7,526 3.03 1.5051
2020-02-14 2019-12-31 13F MICROSOFT Common Stock 594918104 46,321 302 0.66 7,305 14.18 1.2792
2019-10-22 2019-09-30 13F MICROSOFT Common Stock 594918104 46,019 2,325 5.32 6,398 9.31 1.2539
2019-07-22 2019-06-30 13F MICROSOFT Common Stock 594918104 43,694 89 0.20 5,853 13.83 1.2146
2019-04-15 2019-03-31 13F MICROSOFT Common Stock 594918104 43,605 2,221 5.37 5,142 22.34 1.0562
2019-01-26 2018-12-31 13F MICROSOFT COM 594918104 41,384 -1,829 -4.23 4,203 -15.87 1.0214
2018-11-05 2018-09-30 13F MICROSOFT Common Stock 594918104 43,213 2,152 5.24 4,996 23.39 0.9264
2018-08-14 2018-06-30 13F MICROSOFT Common Stock 594918104 41,061 4,909 13.58 4,049 26.29 0.8104
2018-04-23 2018-03-31 13F MICROSOFT COM 594918104 36,152 329 0.92 3,206 1.33 0.9532
2018-01-24 2017-12-31 13F MICROSOFT COM 594918104 35,823 3,550 11.00 3,164 28.57 0.9095
2017-10-23 2017-09-30 13F MICROSOFT COM 594918104 32,273 974 3.11 2,461 12.73 0.7985
2017-08-09 2017-06-30 13F MICROSOFT COM 594918104 31,299 2,024 6.91 2,183 13.28 0.7579
2017-05-16 2017-03-31 13F MICROSOFT COM 594918104 29,275 6,914 30.92 1,927 36.96 0.7362
2017-05-15 2016-12-31 13F MICROSOFT COM 594918104 22,361 22,361 1,407 0.6072
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2022-04-13 2022-03-31 13F MICROSOFT COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-02-17 2021-12-31 13F/A MICROSOFT COM Call 1,500 6 n/a n/a n/a
2022-02-10 2021-12-31 13F MICROSOFT COM Call 1,500 6 n/a n/a n/a
2021-02-08 2020-12-31 13F MICROSOFT Listed Options Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-10-13 2020-09-30 13F MICROSOFT Listed Options Call 1 -50.00 1 -66.67 n/a n/a n/a
2020-07-31 2020-06-30 13F MICROSOFT Listed Options Call 2 3 n/a n/a n/a
2020-02-14 2019-12-31 13F MICROSOFT Listed Options Call 0 -100.00 0 n/a n/a n/a
2019-10-22 2019-09-30 13F MICROSOFT Listed Options Call 1 0 n/a n/a n/a
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.