McKesson Corporation
MX ˙ BMV ˙ US58155Q1031
SecurityMX:MCK / McKesson Corporation
InstitutionBoothbay Fund Management, Llc
Latest Disclosed Ownership2,950 shares
Latest Disclosed Value $ 2,552,812
Boothbay Fund Management, Llc ownership in MCK / McKesson Corporation

On May 15, 2026 - Boothbay Fund Management, Llc filed a 13F-HR form disclosing ownership of 2,950 shares of McKesson Corporation (MX:MCK) valued at $2,552,812 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 789 shares of McKesson Corporation. This represents a change in shares of 273.89% during the quarter.

Boothbay Fund Management, Llc has a history of taking positions in derivatives of the underlying security (MCK) 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:MCK / McKesson 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 MCKESSON COM 58155Q103 2,950 2,161 273.89 2,553 294.44 0.0331
2026-02-17 2025-12-31 13F MCKESSON COM 58155Q103 789 -138 -14.89 647 -9.64 0.0097
2025-11-14 2025-09-30 13F MCKESSON COM 58155Q103 927 286 44.62 716 52.67 0.0104
2025-08-14 2025-06-30 13F MCKESSON COM 58155Q103 641 -15,125 -95.93 470 -95.58 0.0091
2025-05-15 2025-03-31 13F MCKESSON COM 58155Q103 15,766 13,886 738.62 10,610 890.66 0.2796
2025-02-14 2024-12-31 13F MCKESSON COM 58155Q103 1,880 -19,062 -91.02 1,071 -89.66 0.0264
2024-11-14 2024-09-30 13F MCKESSON COM 58155Q103 20,942 12,973 162.79 10,354 122.48 0.2355
2024-08-14 2024-06-30 13F MCKESSON COM 58155Q103 7,969 -7,147 -47.28 4,654 -42.65 0.1102
2024-05-15 2024-03-31 13F MCKESSON COM 58155Q103 15,116 -12,946 -46.13 8,115 -37.54 0.1563
2024-02-14 2023-12-31 13F MCKESSON COM 58155Q103 28,062 6,735 31.58 12,992 40.09 0.3316
2023-11-14 2023-09-30 13F MCKESSON COM 58155Q103 21,327 -30,556 -58.89 9,274 -58.17 0.2203
2023-08-14 2023-06-30 13F MCKESSON COM 58155Q103 51,883 3,817 7.94 22,170 29.55 0.4863
2023-05-15 2023-03-31 13F MCKESSON COM 58155Q103 48,066 37,196 342.19 17,114 319.74 0.3511
2023-02-14 2022-12-31 13F MCKESSON COM 58155Q103 10,870 9,952 1,084.10 4,078 1,206.73 0.0943
2022-11-14 2022-09-30 13F MCKESSON COM 58155Q103 918 918 312 0.0078
2022-05-16 2022-03-31 13F MCKESSON COM 58155Q103 0 -4,064 -100.00 0 -100.00
2022-02-14 2021-12-31 13F MCKESSON COM 58155Q103 4,064 -1,719 -29.73 1,010 -12.40 0.0238
2021-11-15 2021-09-30 13F MCKESSON COM 58155Q103 5,783 -36,562 -86.34 1,153 -85.76 0.0319
2021-08-17 2021-06-30 13F/A-1 MCKESSON COM 58155Q103 42,345 16,738 65.36 8,098 62.15 0.2602
2021-08-16 2021-06-30 13F MCKESSON COM 58155Q103 42,345 16,738 8,098 0.2547
2021-05-17 2021-03-31 13F MCKESSON COM 58155Q103 25,607 10,372 68.08 4,994 88.45 0.1871
2021-02-12 2020-12-31 13F MCKESSON COM 58155Q103 15,235 4,065 36.39 2,650 59.25 0.0986
2020-11-16 2020-09-30 13F MCKESSON COM 58155Q103 11,170 4,660 71.58 1,664 66.57 0.1007
2020-08-14 2020-06-30 13F MCKESSON COM 58155Q103 6,510 -4,093 -38.60 999 -30.33 0.0683
2020-05-15 2020-03-31 13F MCKESSON COM 58155Q103 10,603 1,241 13.26 1,434 10.73 0.1188
2020-02-14 2019-12-31 13F MCKESSON COM 58155Q103 9,362 7,111 315.90 1,295 320.45 0.1126
2019-11-14 2019-09-30 13F McKesson COM 58155Q103 2,251 2,251 308 0.0282
2018-05-14 2018-03-31 13F MCKESSON COM 58155Q103 0 -1,413 -100.00 0 -100.00
2018-02-14 2017-12-31 13F MCKESSON COM 58155Q103 1,413 -568 -28.67 220 -27.63 0.0322
2017-11-14 2017-09-30 13F MCKESSON COM 58155Q103 1,981 -157 -7.34 304 -13.64 0.0505
2017-08-14 2017-06-30 13F McKesson COM 58155Q103 2,138 475 28.56 352 42.51 0.0732
2017-05-15 2017-03-31 13F McKesson COM 58155Q103 1,663 -798 -32.43 247 -28.61 0.0460
2017-07-18 2016-12-31 13F/A-2 McKesson COM 58155Q103 2,461 -6,436 -72.34 346 34,500.00 0.0788
2017-02-16 2016-12-31 13F/A-1 MCKESSON COM 58155Q103 2,461 0 346 0.0854
2017-02-15 2016-12-31 13F MCKESSON COM 58155Q103 2,461 346
2016-11-14 2016-09-30 13F MCKESSON EQUITIES 58155Q103 8,897 1,093 14.01 1 -99.93 0.4614
2017-07-18 2016-06-30 13F/A-1 MCKESSON COM 58155Q103 7,804 -97 -1.23 1,457 17.31 0.7205
2016-08-15 2016-06-30 13F MCKESSON COM 58155Q103 7,804 1,457
2017-07-18 2016-03-31 13F/A-3 MCKESSON COM 58155Q103 7,901 799 11.25 1,242 -11.35 0.9776
2016-05-16 2016-03-31 13F MCKESSON COM 58155Q103 7,901 1,242
2017-07-18 2015-12-31 13F/A-3 MCKESSON COM 58155Q103 7,102 858 13.74 1,401 21.30 0.7901
2016-06-09 2015-12-31 13F/A-1 MCKESSON COM 58155Q103 7,102 0 1,401 0.9706
2016-02-16 2015-12-31 13F MCKESSON COM 58155Q103 6,243 1,231
2016-06-09 2015-09-30 13F/A-1 MCKESSON COM 58155Q103 6,244 6,244 1,155 1.0768
2015-11-16 2015-09-30 13F MCKESSON COM 58155Q103 6,244 1,155 0.6518
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
(%)
2025-11-14 2025-09-30 13F MCKESSON COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-14 2025-06-30 13F MCKESSON COM Call 11,600 8,500 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
(%)
2025-11-14 2025-09-30 13F MCKESSON COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-14 2025-06-30 13F MCKESSON COM Put 15,800 11.27 11,578 21.15 n/a n/a n/a
2025-05-15 2025-03-31 13F MCKESSON COM Put 14,200 9,556 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.