CME Group (CME)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 9, 2026CongressDisclosed purchase of CME — reported range $1,001 - $15,000
2. Feb 4, 2026Company filing · Form 8-K · ResultsReported its results
3. Feb 6, 2026InsiderDirector sold ~$224K of CME shares in the open market
4. Feb 12, 2026Government · Federal Register noticeNotice of an Application of the Chicago Mercantile Exchange Inc. for an Exemption Pursuant to Section 36 of the Securities Exchange Act of 1934 and Request for Comment in Connection With the Opening Price Settlement Requirements of Rule 6h-1(b) Under the Securities Exchange Act of 1934 for Certain Cash-Settled Security Futures
5. Feb 20, 2026InsiderDirector sold ~$92K of CME shares in the open market
6. Feb 23, 2026InsiderDirector sold ~$1.3M of CME shares in the open market
7. Mar 5, 20265% stakeThe Vanguard Group reported a passive stake (13G) of 10.1%
8. Mar 6, 2026InsiderDirector sold ~$320K of CME shares in the open market
9. Mar 12, 2026Insider · Their largest sale since 2013Officer sold ~$1.59M of CME shares in the open market
10. Mar 17, 2026InsiderOfficer sold ~$1.03M of CME shares in the open market
11. Mar 26, 20265% stakeThe Vanguard Group reported a passive stake (13G)
12. Mar 27, 2026 · this disclosureCongressDisclosed purchase of CME — reported range $1,001 - $15,000

What came next

1. Apr 22, 2026Company filing · Form 8-K · ResultsReported its results
2. Apr 22, 2026Company filing · Form 8-K · Material agreementSigned an important agreement
3. Apr 29, 20265% stakeVanguard Capital Management reported a passive stake (13G) of 7.5%
4. May 15, 2026Insider · 1 personInsiders: 2 sales (~$10.4M)
5. May 18, 2026Insider · Their largest sale since 2007Officer sold ~$1.75M of CME shares in the open market
6. Jun 12, 2026Government · Federal Register proposed rulePrediction Markets; Public Interest Determinations
7. Jun 16, 2026Company filing · Form 8-K · Executive change, Reg FDChanged a top executive or board member, and shared information with investors“On June 17, 2026, CME Group Inc. (the “Company”) announced that Terrence A. Duffy, the Company’s current Chairman and Chief Executive Officer, will become the Company’s Executive Chairman, and Lynne C. Fitzpatrick, the Company’s current President and Chief Financial Officer, will succeed Mr. Duffy as the Company’s Chief Executive Officer (the “Leadership Transition”).”
8. Jun 16, 2026CongressDisclosed partial sale of CME — reported range $1,001 - $15,000
9. Jul 15, 2026Government · Federal Register noticeOrder Under Section 36 of the Securities Exchange Act of 1934 (the “Exchange Act”) and Rule 6h-1(d) Thereunder Granting Conditional Exemptive Relief to the Chicago Mercantile Exchange Inc. From the Opening Price Settlement Requirements of Rule 6h-1(b) Under the Exchange Act for Certain Cash-Settled Security Futures
10. Jul 22, 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 CME Group

For CME Group, OQRO holds 6 insider filings (SEC Form 4 or Form 144), 1 Congress trade report and 60 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 CME 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 CME Group

• SEC Form 144Sep 16, 2026
• SEC Form 4Sep 15, 2026
• SEC Form 144Sep 14, 2026
• SEC Form 4Sep 11, 2026
• SEC Form 4Sep 11, 2026
• SEC Form 144Sep 10, 2026

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