Costco (COST)Midwest Trust Co added to its stake +1,605 shares

83K

Shares reported · +1,605 vs prior quarter

0.88%

Disclosed portfolio weight

$77.9M

Reported value

Holdings as of

Jun 30, 2026

Filed

Aug 5, 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. Mar 27, 2026CongressDisclosed purchase of COST — reported range $1,001 - $15,000
2. Jun 23, 2026InsiderDirector sold ~$847K of COST shares in the open market
3. Jul 10, 2026CongressDisclosed purchase of COST — reported range $1,001 - $15,000
4. Jul 30, 2026CongressDisclosed sale of COST — reported range $1,001 - $15,000

What came next

1. Sep 24, 2026Company filing · Form 8-K · ResultsReported its results
2. Sep 29, 2026Insider · 2 peopleInsiders: 2 sales (~$2.7M)

How to read SEC Form 13F-HR

Form 13F is the quarterly report in which investment managers that oversee $100 million or more list the US-listed stocks and some other securities they held on the last day of the quarter.

Full guide: What is an SEC Form 13F?

What else is on file for Costco

For Costco, OQRO holds 4 insider filings (SEC Form 4 or Form 144), 3 Congress trade reports and 129 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 COST page.

How this filing works

• SEC Form 13F

Other disclosures at Costco

• SEC Form 4Sep 30, 2026
• SEC Form 4Sep 30, 2026
• SEC Form 144Sep 29, 2026
• SEC Form 144Sep 29, 2026
• SEC Form 13F-HRAug 26, 2026
• SEC Form 13F-HRAug 25, 2026

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