Transactions
2
Insider / COSTCO WHOLESALE CORP /NEW
Rubanenko Yoram
Executive Vice President at COSTCO WHOLESALE CORP /NEW
- Company
- COSTCO WHOLESALE CORP /NEW
- Ticker
- COST
- First filing on record
- September 14, 2026
- Latest trade on record
- September 10, 2026
- SEC filings
- EDGAR ↗
Rubanenko Yoram, Executive Vice President at COSTCO WHOLESALE CORP /NEW, has disclosed 2 transactions in COST since September 14, 2026: 0 purchases (0 open-market buys) and 1 sale, worth about $1.5M at the reported prices. The latest was filed September 14, 2026, 4 days after the trade.
Open-market buys
0
Sales
1
Avg. disclosure lag
4.0d
Trading in charts
Trade timeline
When does this person trade, how big, and in which direction? Every trade in the last 12 months.
Bought (above the line)Sold (below the line)Other transaction
In the last 12 months Rubanenko Yoram made no purchases and 1 sale worth $1.5M, plus 1 other transaction. Dot size is the dollar amount.
Portfolio mix
Which stocks does this person trade most? Tile size is dollars traded, all time on record.
Rubanenko Yoram has traded 1 stock on record; the largest by dollars is COST.
What kind of transactions
Most Form 4 rows are pay arriving or tax being withheld, not a decision to buy or sell. Only code P is an open-market purchase and code S an open-market sale. What each code means: Form 4 transaction codes.
| Code | Meaning | Rows | Shares | Value |
|---|---|---|---|---|
| A | Grant or award | 1 | 4,129 | — |
| F | Shares withheld for tax | 1 | 1,696 | $1.5M |
| Year | Rows | Bought | Sold |
|---|---|---|---|
| 2026 | 2 | 0 | 1 · $1.5M |
Transactions
| Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| COST | Sell F | September 10, 2026 | September 14, 2026 | 4d | 1,696 | $902 | $1.5M | Form 4 ↗ | ||
| COST | Other A | September 10, 2026 | September 14, 2026 | 4d | 4,129 | — | — | Form 4 ↗ |
Filings
| Filed | Form | Accession | Rows | Status | Source |
|---|---|---|---|---|---|
| September 14, 2026 | Form 4 | 0000909832-26-000078 | 2 | published | EDGAR ↗ |
Other insiders at COSTCO WHOLESALE CORP /NEW
- Klauer James C Executive Vice President 13 rows
- Adamo Claudine Executive Vice President 10 rows
- Frates Caton Executive Vice President 9 rows
- MILLERCHIP GARY Executive Vice President 8 rows
- Barbre Tiffany Marie Insider 7 rows
- DENMAN KENNETH D Director 7 rows
- STANTON JOHN W Director 7 rows
- Vachris Roland Michael President and CEO 7 rows
- DECKER SUSAN L Director 6 rows
- George Sarah Catherine Executive Vice President 6 rows
Everyone on file, with contracts and lobbying under the company's name: COSTCO WHOLESALE CORP /NEW.
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| SEC EDGAR, Form 4 | 1 | 2 | September 14, 2026 | September 14, 2026 | Form 4 list on EDGAR |
Site built October 27, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Every row comes from the reporting owner's Form 4 as filed with the SEC (EDGAR ownership XML), read daily. "Value" is shares × the reported price; code P is an open-market purchase, S a sale, M an option exercise, A a grant. The lag is the filing date minus the trade date; Form 4 is due within two business days. Amendments (4/A) are not merged. Details on the methodology page; report an error on corrections.
Not investment advice. Figures are public disclosures shown as filed; they may lag the trade and may be amended later. No recommendation is made or implied.