McKesson Corporation (MCK)Sen. Alan Armstrong disclosed a purchase $1K–$15K

$1,001–$15,000

Reported range · official band, not an exact amount

116 days

Disclosure lag

Traded

Mar 27, 2026

Disclosed

Jul 21, 2026

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Jan 7, 2025CongressDisclosed purchase of MCK — reported range $1,001 - $15,000
2. Dec 1, 2025Federal contract · $1.1B obligatedDepartment of Veterans Affairs awarded McKesson Corporation: $1.11B obligated to date
3. Jan 1, 2026Federal contract · $1.1B obligatedDepartment of Veterans Affairs awarded McKesson Corporation: $1.09B obligated to date
4. Jan 5, 2026Congress · 1 personMembers of Congress: 2 purchases
5. Feb 1, 2026Federal contract · $1.1B obligatedDepartment of Veterans Affairs awarded McKesson Corporation: $1.06B obligated to date
6. Feb 4, 2026Company filing · Form 8-K · ResultsReported its results
7. Feb 4, 2026CongressDisclosed purchase of MCK — reported range $15,001 - $50,000
8. Feb 6, 2026InsiderOfficer sold ~$313K of MCK shares in the open market
9. Feb 10, 2026Layoff notice · 2700 North America Avenue West Seneca, NY, 14224Layoff notice filed in NY: 78 employees
10. Feb 11, 2026InsiderOfficer sold ~$283K of MCK shares in the open market
11. Feb 17, 2026InsiderOfficer sold ~$180K of MCK shares in the open market
12. Feb 19, 2026InsiderDirector sold ~$328K of MCK shares in the open market
13. Mar 1, 2026Federal contract · $1.2B obligatedDepartment of Veterans Affairs awarded McKesson Corporation: $1.18B obligated to date
14. Mar 2, 2026InsiderOfficer sold ~$2.7M of MCK shares in the open market
15. Mar 3, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“On March 3, 2026, Britt J. Vitalone, the company’s Executive Vice President and Chief Financial Officer, gave notice of his intention to retire from that role. Mr. Vitalone’s last day as our CFO will be May 28, 2026, and he will remain an employee through July 1, 2026.”
16. Mar 27, 2026 · this disclosureCongressDisclosed purchase of MCK — reported range $1,001 - $15,000

What came next

1. Mar 27, 20265% stakeThe Vanguard Group reported a passive stake (13G)
2. Apr 1, 2026Company filing · Form 8-K · Material agreement, New debtSigned an important agreement, and took on new debt or obligations
3. Apr 1, 2026Federal contract · $1.2B obligatedDepartment of Veterans Affairs awarded McKesson Corporation: $1.19B obligated to date
4. Apr 8, 2026CongressDisclosed partial sale of MCK — reported range $1,001 - $15,000
5. Apr 28, 2026Company filing · Form 8-K · Material agreement, Agreement endedSigned an important agreement, and ended an important agreement (and 1 more item)
6. Apr 30, 20265% stakeVanguard Capital Management reported a passive stake (13G) of 7.5%
7. May 1, 2026Federal contract · $1.4B obligatedDepartment of Veterans Affairs awarded McKesson Corporation: $1.4B obligated to date
8. May 7, 2026Company filing · Form 8-K · ResultsReported its results
9. May 26, 2026Insider · 2 peopleInsiders: 2 sales (~$4.5M)
10. Jun 1, 2026Insider · 2 peopleInsiders: 2 sales (~$1.4M)
11. Jun 2, 2026InsiderOfficer sold ~$514K of MCK shares in the open market
12. Jun 5, 2026InsiderOfficer sold ~$102K of MCK shares in the open market
13. Jun 9, 2026Company filing · Form 8-K · Material agreement, New debtSigned an important agreement, and took on new debt or obligations
14. Jun 9, 2026InsiderCEO sold ~$3.76M of MCK shares in the open market
15. Jun 10, 2026FDARecall: Gemcitabine Injection, 1 g per 26.3 mL (38 mg/mL), 26.3 mL Single-Dose Vial, For Intravenous Infusion ONLY, Rx only, Manufactured by: THYMOORGAN PHARMAZIE GmbH…
16. Jun 15, 2026CongressDisclosed sale of MCK — reported range $1,001 - $15,000
17. Jun 17, 2026InsiderCEO sold ~$6.56M of MCK shares in the open market
18. Jun 29, 2026Company filing · Form 8-K · Executive change, Reg FDChanged a top executive or board member, and shared information with investors“On June 29, 2026, Thomas L. Rodgers, the company’s Executive Vice President, Chief Strategy and Business Development Officer and a named executive officer, gave notice of his intention to retire from that role.”
19. Jul 7, 2026InsiderCEO sold ~$6.72M of MCK shares in the open market
20. Jul 8, 2026CongressDisclosed purchase of MCK — reported range $1,001 - $15,000

How to read Senate eFD periodic transaction report

The STOCK Act is a 2012 US law that requires members of Congress, and some senior staff, to publicly report their stock trades, and those of their spouse and dependent children, within 45 days.

Full guide: What is the STOCK Act?

What else is on file for McKesson Corporation

For McKesson Corporation, OQRO holds 2 insider filings (SEC Form 4 or Form 144), 2 Congress trade reports, 47 fund holdings reports (13F) and 3 federal contract awards dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its MCK page.

Other recent filings by Sen. Alan Armstrong

• Senate eFD periodic transaction report at Williams Companies (WMB)Sep 17, 2026
• Senate eFD periodic transaction report at Williams Companies (WMB)Sep 17, 2026
• Senate eFD periodic transaction report at KKR & Co. (KKR)Jul 21, 2026
• Senate eFD periodic transaction report at Globe Life (GL)Jul 21, 2026
• Senate eFD periodic transaction report at Copart (CPRT)Jul 21, 2026

The full history of Sen. Alan Armstrong is on the profile page.

How this filing works

• The STOCK Act

Other disclosures at McKesson Corporation

• USAspending.gov award recordOct 5, 2026
• SEC Form 4Sep 10, 2026
• USAspending.gov award recordSep 4, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 14, 2026
• SEC Form 13F-HRAug 14, 2026

Everything OQRO holds on this company is on its MCK page.