McKesson Corporation
MX ˙ BMV ˙ US58155Q1031
SecurityMX:MCK / McKesson Corporation
InstitutionCalamos Advisors LLC
Latest Disclosed Ownership48,933 shares
Latest Disclosed Value $ 42,344,661
Calamos Advisors LLC reports 60.20% increase in ownership of MCK / McKesson Corporation

On May 4, 2026 - Calamos Advisors LLC filed a 13F-HR form disclosing ownership of 48,933 shares of McKesson Corporation (MX:MCK) valued at $42,344,661 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 30,545 shares of McKesson Corporation. This represents a change in shares of 60.20% during the quarter.

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)
2026-05-04 2026-03-31 13F MCKESSON COM 58155Q103 48,933 18,388 60.20 42,345 69.00 0.1494
2026-01-29 2025-12-31 13F MCKESSON COM 58155Q103 30,545 -1,237 -3.89 25,056 2.05 0.0941
2025-10-20 2025-09-30 13F MCKESSON COM 58155Q103 31,782 0 0.00 24,553 5.42 0.0907
2025-08-08 2025-06-30 13F MCKESSON COM 58155Q103 31,782 0 0.00 23,289 8.89 0.0917
2025-04-29 2025-03-31 13F MCKESSON COM 58155Q103 31,782 413 1.32 21,389 19.64 0.0931
2025-01-24 2024-12-31 13F MCKESSON COM 58155Q103 31,369 0 0.00 17,878 15.27 0.0748
2024-11-07 2024-09-30 13F MCKESSON COM 58155Q103 31,369 -36,454 -53.75 15,509 -60.85 0.0671
2024-07-25 2024-06-30 13F MCKESSON COM 58155Q103 67,823 -852 -1.24 39,611 7.44 0.1759
2024-05-08 2024-03-31 13F MCKESSON COM 58155Q103 68,675 13,859 25.28 36,868 45.28 0.1747
2024-01-31 2023-12-31 13F MCKESSON COM 58155Q103 54,816 -16,012 -22.61 25,379 -17.60 0.1231
2023-10-26 2023-09-30 13F MCKESSON COM 58155Q103 70,828 13,471 23.49 30,800 25.66 0.1600
2023-07-28 2023-06-30 13F MCKESSON COM 58155Q103 57,357 6,741 13.32 24,509 36.00 0.1213
2023-05-04 2023-03-31 13F MCKESSON COM 58155Q103 50,616 -6,328 -11.11 18,022 -15.63 0.0880
2023-01-26 2022-12-31 13F MCKESSON COM 58155Q103 56,944 -10,068 -15.02 21,361 -6.21 0.1002
2022-10-24 2022-09-30 13F MCKESSON COM 58155Q103 67,012 0 0.00 22,775 4.19 0.1042
2022-08-01 2022-06-30 13F MCKESSON COM 58155Q103 67,012 1,805 2.77 21,860 9.51 0.0943
2022-05-03 2022-03-31 13F MCKESSON COM 58155Q103 65,207 8,691 15.38 19,962 42.10 0.0749
2022-02-01 2021-12-31 13F MCKESSON COM 58155Q103 56,516 2,188 4.03 14,048 29.69 0.0525
2021-10-26 2021-09-30 13F MCKESSON COM 58155Q103 54,328 4,794 9.68 10,832 14.35 0.0473
2021-07-22 2021-06-30 13F MCKESSON COM 58155Q103 49,534 11,267 29.44 9,473 26.92 0.0433
2021-04-12 2021-03-31 13F MCKESSON COM 58155Q103 38,267 1,183 3.19 7,464 15.72 0.0407
2021-01-27 2020-12-31 13F MCKESSON COM 58155Q103 37,084 -1,606 -4.15 6,450 11.94 0.0374
2020-10-26 2020-09-30 13F MCKESSON COM 58155Q103 38,690 -3,396 -8.07 5,762 -10.76 0.0371
2020-07-27 2020-06-30 13F MCKESSON COM 58155Q103 42,086 -2,693 -6.01 6,457 6.60 0.0456
2020-04-28 2020-03-31 13F MCKESSON COM 58155Q103 44,779 -5,227 -10.45 6,057 -12.43 0.0475
2020-01-15 2019-12-31 13F MCKESSON COMMON STOCK 58155Q103 50,006 -3,800 -7.06 6,917 -5.93 0.0342
2019-10-21 2019-09-30 13F MCKESSON COMMON STOCK 58155Q103 53,806 8,762 19.45 7,353 21.48 0.0400
2019-08-07 2019-06-30 13F MCKESSON COMMON STOCK 58155Q103 45,044 1,171 2.67 6,053 17.85 0.0336
2019-04-12 2019-03-31 13F MCKESSON COMMON STOCK 58155Q103 43,873 1,499 3.54 5,136 9.72 0.0320
2019-01-24 2018-12-31 13F MCKESSON COMMON STOCK 58155Q103 42,374 6,345 17.61 4,681 -2.05 0.0309
2018-10-22 2018-09-30 13F MCKESSON COMMON STOCK 58155Q103 36,029 7,432 25.99 4,779 25.27 0.0263
2018-07-17 2018-06-30 13F MCKESSON COMMON STOCK 58155Q103 28,597 3,426 13.61 3,815 7.59 0.0233
2018-04-13 2018-03-31 13F MCKESSON COMMON STOCK 58155Q103 25,171 1,189 4.96 3,546 -5.19 0.0231
2018-02-13 2017-12-31 13F MCKESSON COMMON STOCK 58155Q103 23,982 -509 -2.08 3,740 -0.58 0.0191
2017-10-25 2017-09-30 13F MCKESSON COMMON STOCK 58155Q103 24,491 898 3.81 3,762 -3.09 0.0291
2017-08-09 2017-06-30 13F MCKESSON COMMON STOCK 58155Q103 23,593 23,593 3,882 0.0287
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.