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Costco runs a membership warehouse model: annual fees, not product markups, supply most of its operating profit. Merchandise sells near cost across roughly 900 warehouses, and the Kirkland Signature private label accounts for about a quarter of sales.
COSTCO WHOLESALE CORP /NEW (COST) is a retail-variety stores company. Piotroski F-Score 6/8. 1 insider Form 4 filings in the last 90 days. Next earnings projected around 2026-09-24 from COST's year-over-year reporting pattern (not yet company-confirmed). Fundamentals from SEC filings; prices are end-of-day.
Led by Ron Vachris · see pay & career →
Costco has sold its hot-dog-and-soda combo for $1.50 since 1985. A former CEO once said the price would stay $1.50 "forever" — and it has, even as inflation reshaped everything around it.
Source: Costco · More →
EOD daily bars · delayed, not real-time · data: DatabentoCharting by TradingView Lightweight Charts™
XBRL company facts, SEC EDGAR. TTM = last four reported quarters. Valuation ratios arrive with a price source — we don't fake quotes.
FY ending 2025-08-31 vs 2024-09-01. original 1968 formula; calibrated on manufacturers, read financials/REITs with care
A plain-English read on COST plus an auto-SWOT — built from COST's SEC filings and market data, every point cited, nothing invented. Educational, not investment advice.
Four AI analysts — a bull, a bear, a risk manager, and a PM — debate COST using only the SEC-filing and market facts below. Every point cites its evidence; nothing is invented. This is educational research, not investment advice.
Educational only — not financial advice. Data from SEC EDGAR public filings; no live market data is shown. Figures reflect the company's own reported XBRL facts and may lag.
| DENMAN KENNETH DDirector | SELL | $847K | view → |
| Frates CatonExecutive Vice President | SELL | $695K | view → |
| Adamo ClaudineExecutive Vice President | SELL | $732K | view → |
| Jones Teresa A.Executive Vice President | SELL | $838K | view → |
| DECKER SUSAN LDirector | SELL | $437K | view → |
| Klauer James CExecutive Vice President | SELL | $1.4M | view → |
Projected from COST's own SEC 8-K filing history — the year-over-year reporting pattern (~50% land the exact day, ~90% within a week). No analyst estimates, no scraped calendars, nothing invented. It upgrades to a confirmed date + time the moment COST files its announcement.
COST has sold off after 6 of its last 8 earnings reports.
Earnings reactions have been mild.
COST has traded lower after most recent earnings releases.
The average is inflated by its most volatile prints (+2.7% and -8.0%).
A more typical earnings reaction has been approximately ±2.6%.
Realized close-to-close history only — no options-implied move, no analyst estimates.
| Reported | Close-to-close |
|---|---|
| 2026-05-28 | -4.7% |
| 2026-03-05 | -0.9% |
| 2025-12-11 | +1.2% |
| 2025-09-25 | -3.1% |
| 2025-05-29 | +2.7% |
| 2025-03-06 | -8.0% |
| 2024-12-12 |
Earnings dates are the company's 8-K Item 2.02 filings (SEC). Reactions from Databento EOD.
| -0.5% |
| 2024-09-26 | -2.5% |