When does Costco Wholesale Corporation (COST) report earnings? Dates quarter by quarter

None of its last 12 announcements carries a time on the filing, so there is no way to say which session they fell in. Each one comes from the 8-K with item 2.02 that Costco Wholesale filed with the SEC, paired with the 10-Q or 10-K for that same quarter: 68 quarters since Dec 10, 2009, and every row links to its filing.

Next date: COST does not appear in the announced-earnings calendar this site covers (Oct 21, 2026 to Nov 24, 2026). When the company announces the day it will show up here; until then there is no date, and an estimate of ours would not be one.

The last 20 quarters, one by one

"Lead": trading sessions between the announcement and the full quarterly report to the SEC (10-Q, or 10-K at fiscal year end). For Costco Wholesale, a median of 5 sessions over the last 12 quarters.

The table shows the 20 most recent quarters. All 68 are in the CSV, with the same columns and one row per quarter.

Download all 68 COST quarters as CSV → Free, no account.

How Costco Wholesale shares moved on their latest earnings

Reported EPS beat the consensus estimate in 5 of the 5 quarters with an estimate.

Split-adjusted closes and EPS with its estimate, from Yahoo Finance. It already happened: it does not anticipate the next announcement.

Where each number comes from

From the 8-K with item 2.02 ("Results of Operations and Financial Condition") that Costco Wholesale filed on EDGAR, the SEC's public database; only those with their 10-Q or 10-K behind them count, so other 8-Ks with the same item (production figures, monthly sales) stay out. No time is published for this company: its EDGAR acceptance stamp and the official header of its filings disagree, so there is no way to know whether the stamp is in New York time or UTC, and the two readings are four or five hours apart —enough to change session—. The dates are firm; the time and the session are deliberately left empty rather than filled in with a guess. In 1 of this company's 68 quarters the date comes from the EDGAR acceptance day rather than the 8-K cover box, and it is flagged with an asterisk in the table.

What this data does not know

• The exact time of the press release: the 8-K reaches EDGAR minutes or hours later, so any 8-K time is an upper bound. The session says which one the news landed in, not what minute it was said.
• Nothing before Dec 10, 2009: it is Costco Wholesale's oldest quarter with announcement and report paired in the file.
• What will happen. Every date on the page already happened.
• Costco Wholesale's identity is its SEC CIK (0000909832), not its symbol: symbols get recycled and renamed.

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More on Costco Wholesale

Costco Wholesale is in the Consumer Defensive sector. On the model's multifactor score of Oct 21, 2026 it ranks 389 of 464, and 23 of the 32 companies in its sector that score. It is a quantitative model ranking, not a recommendation.

Costco Wholesale (COST) analysis page →

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Guide: 10-K, 10-Q and 8-K · all guides

Source: EDGAR, the SEC's public database (forms 8-K, 10-Q and 10-K). Data through Sep 24, 2026. This is a list of public facts and of calculations made on them, not financial advice or a recommendation to buy or sell.