T-Mobile (TMUS)Sen. Alan Armstrong disclosed a sale $15K–$50K

$15,001–$50,000

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 13, 2026CongressDisclosed sale of TMUS — reported range $50,001 - $100,000
2. Jan 30, 2026Layoff notice · 50 Commerce Dr., Suite 130, SchaumburgLayoff notice filed in IL: 337 employees
3. Feb 2, 2026Layoff notice · Various locations in WashingtonLayoff notice filed in WA: 637 employees
4. Feb 11, 2026Company filing · Form 8-K · ResultsReported its results
5. Feb 12, 2026InsiderDirector sold ~$120M of TMUS shares in the open market
6. Feb 17, 2026InsiderOfficer sold ~$2.26M of TMUS shares in the open market
7. Feb 18, 2026Insider · 2 peopleInsiders: 2 sales (~$7.2M)
8. Feb 19, 2026Insider · Their largest sale since 2015Director sold ~$17.2M of TMUS shares in the open market
9. Feb 23, 2026InsiderDirector sold ~$3.06M of TMUS shares in the open market
10. Feb 24, 2026Insider · 2 peopleInsiders: 2 sales (~$760K)
11. Mar 4, 2026InsiderDirector sold ~$728K of TMUS shares in the open market
12. Mar 10, 2026InsiderDirector sold ~$218K of TMUS shares in the open market
13. Mar 23, 20265% stakeDeutsche Telekom AG filed an activist stake (13D) of 53.7%
14. Mar 26, 2026Company filing · Form 8-K · Executive changeChanged a top executive or board member“On March 26, 2026, Abdurazak Mudesir notified the Board of Directors (the “Board”) of T-Mobile US, Inc. (the “Company”) of his decision to resign from the Board and from the Nominating, Corporate Governance and Compliance Committee of the Board, effective March 31, 2026.”
15. Mar 27, 2026 · this disclosureCongressDisclosed sale of TMUS — reported range $15,001 - $50,000

What came next

1. Apr 14, 2026Layoff notice · Austin, Travis CountyLayoff notice filed in TX: 74 employees
2. Apr 28, 2026Company filing · Form 8-K · ResultsReported its results
3. May 1, 2026Insider · 2 peopleInsiders: 1 purchase (~$1.0M), 1 sale (~$979K)
4. May 21, 2026InsiderOfficer sold ~$912K of TMUS shares in the open market
5. Jul 2, 2026Company filing · Form 8-K · Executive change, Reg FDChanged a top executive or board member, and shared information with investors
6. Jul 23, 2026Company filing · Form 8-K · ResultsReported its results

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 T-Mobile

For T-Mobile, OQRO holds 2 insider filings (SEC Form 4 or Form 144), 1 Congress trade report and 46 fund holdings reports (13F) 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 TMUS 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 T-Mobile

• SEC Form 4Sep 14, 2026
• SEC Form 144Sep 10, 2026
• SEC Form 13F-HRAug 26, 2026
• SEC Form 13F-HRAug 25, 2026
• SEC Form 13F-HRAug 18, 2026
• SEC Form 13F-HRAug 14, 2026

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