# COST — Costco Wholesale · catalysts, narrative & risks

**Deep-research report — K3vl4r**  
**Symbols:** COST  
**Sources:** 23  
**Published:** 2026-09-22  
**Canonical:** https://app.k3vl4r.com/research/deep-research-cost-costco-wholesale-catalysts-narrative-risks-4533

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# Costco Wholesale (COST) — as of October 21, 2026

**Anchor event.** The one catalyst clearly inside the last ~1–3 months is Costco's **fiscal Q4 2026 earnings release**, issued after the market close on **September 24, 2026** — a 16-week quarter and fiscal year ending August 30, 2026 [[2]](https://www.marketscreener.com/news/costco-wholesale-corporation-reports-fourth-quarter-and-fiscal-year-2026-operating-results-ce785adfd98ef624), [[6]](https://public.com/stocks/cost/earnings). (The earlier fiscal Q3 2026 report of May 28, 2026 falls outside the 1–3 month window but offers trailing context [[13]](https://www.fool.com/earnings/call-transcripts/2026/05/28/costco-cost-q3-2026-earnings-transcript/), [[18]](https://investor.costco.com/news/news-details/2026/Costco-Wholesale-Corporation-Reports-Third-Quarter-and-Year-To-Date-Operating-Results-For-Fiscal-2026/default.aspx).)

## Recent catalysts (last ~1–3 months)

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