마이크로 소프트 회사
MX ˙ BMV ˙ US5949181045
SecurityMX:MSFT / Microsoft Corporation
InstitutionK2 Principal Fund, L.p.
Latest Disclosed Ownership6,000 shares
Latest Disclosed Value $ 2,221,020
K2 Principal Fund, L.p. ownership in MSFT / Microsoft Corporation

On May 14, 2026 - K2 Principal Fund, L.p. filed a 13F-HR form disclosing ownership of 6,000 shares of Microsoft Corporation (MX:MSFT) valued at $2,221,020 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 0 shares of Microsoft Corporation.

K2 Principal Fund, L.p. 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 and put 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)
2026-05-14 2026-03-31 13F MICROSOFT COM 594918104 6,000 6,000 2,221 0.1551
2026-02-13 2025-12-31 13F MICROSOFT COM 594918104 0 -1,750 -100.00 0 -100.00
2025-11-13 2025-09-30 13F MICROSOFT COM 594918104 1,750 1,750 906 0.0736
2020-11-13 2020-09-30 13F MICROSOFT COM 594918104 0 -7,265 -100.00 0 -100.00
2020-08-13 2020-06-30 13F MICROSOFT COM 594918104 7,265 7,265 1,479 0.2350
2020-05-15 2020-03-31 13F MICROSOFT COM 594918104 0 -113,250 -100.00 0 -100.00
2020-02-13 2019-12-31 13F MICROSOFT COM 594918104 113,250 88,450 356.65 17,860 417.98 1.5451
2019-11-15 2019-09-30 13F MICROSOFT COM 594918104 24,800 24,800 3,448 0.3729
2019-05-14 2019-03-31 13F MICROSOFT COM 594918104 0 -16,000 -100.00 0 -100.00
2019-02-13 2018-12-31 13F MICROSOFT COM 594918104 16,000 3,500 28.00 1,625 13.64 0.2465
2018-11-13 2018-09-30 13F MICROSOFT COM 594918104 12,500 -7,500 -37.50 1,430 -27.48 0.1373
2018-08-13 2018-06-30 13F MICROSOFT COM 594918104 20,000 -5,000 -20.00 1,972 -13.58 0.1525
2018-05-14 2018-03-31 13F MICROSOFT COM 594918104 25,000 -30,000 -54.55 2,282 -51.50 0.1300
2018-02-12 2017-12-31 13F MICROSOFT COM 594918104 55,000 10,319 23.09 4,705 41.38 0.3405
2017-11-09 2017-09-30 13F MICROSOFT COM 594918104 44,681 -16,200 -26.61 3,328 -20.71 0.2200
2017-08-11 2017-06-30 13F MICROSOFT COM 594918104 60,881 -22,000 -26.54 4,197 -23.12 0.2782
2017-05-11 2017-03-31 13F MICROSOFT COM 594918104 82,881 -36,000 -30.28 5,459 -26.10 0.4532
2017-02-15 2016-12-31 13F MICROSOFT COM 594918104 118,881 62,300 110.11 7,387 126.66 0.6978
2016-11-15 2016-09-30 13F/A-1 MICROSOFT COM 594918104 56,581 -31,762 -35.95 3,259 -27.91 0.3655
2016-11-15 2016-09-30 13F MICROSOFT COM 594918104 3,259 56,581
2016-08-11 2016-06-30 13F MICROSOFT COM 594918104 88,343 -50,693 -36.46 4,521 -41.13 0.5961
2016-05-12 2016-03-31 13F MICROSOFT COM 594918104 139,036 -8,664 -5.87 7,679 -6.29 1.0478
2016-02-12 2015-12-31 13F MICROSOFT COM 594918104 147,700 -57,300 -27.95 8,194 -9.69 1.1164
2015-11-13 2015-09-30 13F MICROSOFT COM 594918104 205,000 161,500 371.26 9,073 372.31 1.4717
2015-07-29 2015-06-30 13F MICROSOFT COM 594918104 43,500 43,500 1,921 0.3450
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
(%)
2021-08-13 2021-06-30 13F MICROSOFT COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-05-14 2021-03-31 13F MICROSOFT COM Call 25,000 5,894 n/a n/a n/a
2020-08-13 2020-06-30 13F MICROSOFT COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-05-15 2020-03-31 13F MICROSOFT COM Call 13,000 -76.58 2,050 -76.58 n/a n/a n/a
2020-02-13 2019-12-31 13F MICROSOFT COM Call 55,500 404.55 8,752 472.40 n/a n/a n/a
2019-11-15 2019-09-30 13F MICROSOFT COM Call 11,000 1,529 n/a n/a n/a
Disclosed Put 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
(%)
2020-05-15 2020-03-31 13F MICROSOFT COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2020-02-13 2019-12-31 13F MICROSOFT COM Put 71,000 11,197 n/a n/a n/a
2019-05-14 2019-03-31 13F MICROSOFT COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2019-02-13 2018-12-31 13F MICROSOFT COM Put 8,500 0.00 863 -11.21 n/a n/a n/a
2018-11-13 2018-09-30 13F MICROSOFT COM Put 8,500 972 n/a n/a n/a
2018-05-14 2018-03-31 13F MICROSOFT COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2018-02-12 2017-12-31 13F MICROSOFT COM Put 95,000 8,126 n/a n/a n/a
2017-11-09 2017-09-30 13F MICROSOFT COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2017-08-11 2017-06-30 13F MICROSOFT COM Put 5,000 345 n/a n/a n/a
2017-05-11 2017-03-31 13F MICROSOFT COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2017-02-15 2016-12-31 13F MICROSOFT COM Put 9,000 560 n/a n/a n/a
2016-05-12 2016-03-31 13F MICROSOFT COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2016-02-12 2015-12-31 13F MICROSOFT COM Put 16,200 899 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.