Microsoft Corporation
BG ˙ BUL ˙ US5949181045
SecurityBG:MSF / Microsoft Corporation
InstitutionQuarry LP
Latest Disclosed Ownership297 shares
Latest Disclosed Value $ 109,940
Quarry LP ownership in MSF / Microsoft Corporation

On May 15, 2026 - Quarry LP filed a 13F-HR form disclosing ownership of 297 shares of Microsoft Corporation (BG:MSF) valued at $109,940 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 346 shares of Microsoft Corporation. This represents a change in shares of -14.16% during the quarter.

Quarry LP has a history of taking positions in derivatives of the underlying security (MSF) 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.

BG:MSF / 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)
2026-05-15 2026-03-31 13F MICROSOFT COM 594918104 297 -49 -14.16 110 -34.73 0.0197
2026-02-13 2025-12-31 13F MICROSOFT COM 594918104 346 -1,933 -84.82 167 -85.85 0.0262
2025-11-14 2025-09-30 13F MICROSOFT COM 594918104 2,279 324 16.57 1,180 21.40 0.2588
2025-08-14 2025-06-30 13F MICROSOFT COM 594918104 1,955 246 14.39 972 51.64 0.2069
2025-05-15 2025-03-31 13F MICROSOFT COM 594918104 1,709 777 83.37 642 63.52 0.1391
2025-02-14 2024-12-31 13F MICROSOFT COM 594918104 932 814 689.83 393 684.00 0.0552
2024-11-14 2024-09-30 13F MICROSOFT COM 594918104 118 18 18.00 51 13.64 0.0128
2024-08-16 2024-06-30 13F/A-1 MICROSOFT COM 594918104 100 100 45 0.0129
2024-08-14 2024-06-30 13F MICROSOFT COM 594918104 100 100 45 0.0128
2024-05-15 2024-03-31 13F MICROSOFT COM 594918104 0 -67 -100.00 0 -100.00
2024-02-20 2023-12-31 13F/A-1 MICROSOFT COM 594918104 67 67 25 0.0039
2024-02-14 2023-12-31 13F MICROSOFT COM 594918104 67 67 25 0.0036
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
(%)
2024-05-15 2024-03-31 13F MICROSOFT COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-02-20 2023-12-31 13F/A MICROSOFT COM Call 145,000 625.00 54,526 763.42 n/a n/a n/a
2024-02-14 2023-12-31 13F MICROSOFT Call Call 145,000 54,526 n/a n/a n/a
2023-11-14 2023-09-30 13F MICROSOFT Call Call 20,000 6,315 n/a n/a n/a
2023-08-14 2023-06-30 13F MICROSOFT CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-05-15 2023-03-31 13F MICROSOFT CALL Call 28,000 -20.00 8,072 -3.82 n/a n/a n/a
2023-02-14 2022-12-31 13F MICROSOFT CALL Call 35,000 8,394 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.