# Barbre Tiffany Marie: insider transactions

SEC CIK 2076006. Roles and transactions as reported on Form 4. Latest Form 4 filed 2026-10-26.

## Roles

| Company | Role | Transactions | First | Latest |
| --- | --- | ---: | --- | --- |
| [Costco Wholesale Corp](/companies/cost.md) | Principal Accounting Officer | 6 | 2026-10-22 | 2026-10-22 |

## Transactions: 6

Every transaction reported, newest first. Codes P and S are open-market purchases and sales. Reported price is as stated on the form.

| Date | Company | Transaction | Shares | Reported price | Value | Filing |
| --- | --- | --- | ---: | ---: | ---: | --- |
| 2026-10-22 | [Costco Wholesale Corp](/companies/cost.md) | Tax withholding (F) | 166.451 | $1,018.21 | $169.5k | [Form 4](/filings/0000909832-26-000105.md) |
| 2026-10-22 | [Costco Wholesale Corp](/companies/cost.md) | Tax withholding (F) | 84.603 | $1,018.21 | $86.1k | [Form 4](/filings/0000909832-26-000105.md) |
| 2026-10-22 | [Costco Wholesale Corp](/companies/cost.md) | Tax withholding (F) | 101.536 | $1,018.21 | $103.4k | [Form 4](/filings/0000909832-26-000105.md) |
| 2026-10-22 | [Costco Wholesale Corp](/companies/cost.md) | Tax withholding (F) | 93.948 | $1,018.21 | $95.7k | [Form 4](/filings/0000909832-26-000105.md) |
| 2026-10-22 | [Costco Wholesale Corp](/companies/cost.md) | Tax withholding (F) | 90.23 | $1,018.21 | $91.9k | [Form 4](/filings/0000909832-26-000105.md) |
| 2026-10-22 | [Costco Wholesale Corp](/companies/cost.md) | Grant or award (A) | 1,965 | $0.00 | $0 | [Form 4](/filings/0000909832-26-000105.md) |

Source: SEC EDGAR, Forms 4. Last ingested by Listed: Oct 31, 2026, 07:10 ET. No prices; not investment advice.