McKesson Corporation
US ˙ NYSE ˙ US58155Q1031

SecurityMCK / McKesson Corporation
InstitutionTobam
Latest Disclosed Ownership4,133 shares
Latest Disclosed Value $ 3,577
Tobam reports 115.15% increase in ownership of MCK / McKesson Corporation

On May 12, 2026 - Tobam filed a 13F-HR form disclosing ownership of 4,133 shares of McKesson Corporation (US:MCK) valued at $3,576,533 USD as of March 31, 2026. The entity filed a previous 13F-HR on March 2, 2026 disclosing 1,921 shares of McKesson Corporation. This represents a change in shares of 115.15% during the quarter. The current value of the position is $3,056,477 USD.

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 MCKESSON COM 58155Q103 4,133 2,212 115.15 4 200.00 0.9311
2026-03-02 2025-12-31 13F MCKESSON COM 58155Q103 1,921 -358 -15.71 2 0.00 0.3871
2025-11-07 2025-09-30 13F MCKESSON COM 58155Q103 2,279 -4,182 -64.73 2 -75.00 0.6380
2025-08-08 2025-06-30 13F MCKESSON COM 58155Q103 6,461 -3,225 -33.30 5 -33.33 1.8475
2025-04-16 2025-03-31 13F MCKESSON COM 58155Q103 9,686 -3,385 -25.90 7 -14.29 2.7859
2025-01-28 2024-12-31 13F MCKESSON COM 58155Q103 13,071 -13,018 -49.90 7 -41.67 2.2731
2024-10-09 2024-09-30 13F MCKESSON COM 58155Q103 26,089 -2,565 -8.95 13 -25.00 2.3521
2024-08-01 2024-06-30 13F/A-1 MCKESSON COM 58155Q103 28,654 -28,409 -49.79 17 -46.67 2.6238
2024-07-29 2024-06-30 13F MCKESSON COM 58155Q103 28,654 -28,409 17 2.6238
2024-05-02 2024-03-31 13F MCKESSON COM 58155Q103 57,063 -5,261 -8.44 31 7.14 2.7454
2024-01-26 2023-12-31 13F MCKESSON COM 58155Q103 62,324 2,645 4.43 29 12.00 2.5233
2023-10-31 2023-09-30 13F MCKESSON COM 58155Q103 59,679 10,092 20.35 26 19.05 2.0826
2023-07-31 2023-06-30 13F MCKESSON COM 58155Q103 49,587 5,916 13.55 21 40.00 1.5977
2023-05-03 2023-03-31 13F MCKESSON COM 58155Q103 43,671 26,986 161.74 16 150.00 1.0248
2023-02-02 2022-12-31 13F MCKESSON COM 58155Q103 16,685 15,953 2,179.37 6 -97.59 0.4144
2022-11-02 2022-09-30 13F MCKESSON COM 58155Q103 732 732 249 0.0174
2022-08-02 2022-06-30 13F MCKESSON COM 58155Q103 0 -696 -100.00 0 -100.00
2022-04-25 2022-03-31 13F MCKESSON COM 58155Q103 696 266 61.86 213 99.07 0.0107
2022-02-15 2021-12-31 13F MCKESSON COM 58155Q103 430 -169 -28.21 107 -10.08 0.0048
2021-11-12 2021-09-30 13F MCKESSON COM 58155Q103 599 0 0.00 119 3.48 0.0050
2021-08-11 2021-06-30 13F MCKESSON COM 58155Q103 599 0 0.00 115 -1.71 0.0046
2021-05-11 2021-03-31 13F MCKESSON COM 58155Q103 599 0 0.00 117 12.50 0.0050
2021-02-03 2020-12-31 13F MCKESSON COM 58155Q103 599 0 0.00 104 16.85 0.0046
2020-11-12 2020-09-30 13F MCKESSON COM 58155Q103 599 599 89 0.0045
2019-05-15 2019-03-31 13F MCKESSON COM 58155Q103 0 -489 -100.00 0 -100.00
2019-02-11 2018-12-31 13F MCKESSON COM 58155Q103 489 489 54 0.0026
2018-08-03 2018-06-30 13F MCKESSON COM 58155Q103 0 -43,863 -100.00 0 -100.00
2018-05-14 2018-03-31 13F MCKESSON COM 58155Q103 43,863 -37,480 -46.08 6,179 -51.29 0.2538
2018-02-14 2017-12-31 13F MCKESSON COM 58155Q103 81,343 -20,979 -20.50 12,685 -19.30 0.5489
2017-11-14 2017-09-30 13F MCKESSON COM 58155Q103 102,322 -59,650 -36.83 15,718 -41.02 0.5939
2017-08-08 2017-06-30 13F MCKESSON COM 58155Q103 161,972 -29,022 -15.20 26,651 -5.88 0.9954
2017-05-09 2017-03-31 13F MCKESSON COM 58155Q103 190,994 36,227 23.41 28,317 30.27 1.0933
2017-02-15 2016-12-31 13F MCKESSON COM 58155Q103 154,767 154,767 21,737 0.8852
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.