The earnings result
Costco reported earnings on 2026-03-05 for the fiscal quarter ending Feb/2026. Reported EPS of $4.58 compared with a consensus estimate of $4.55, a beat on the source's earnings measure.
An EPS comparison describes one part of the release. Revenue, segment performance, cash conversion, guidance and the conference-call discussion require the original company disclosures; the result alone does not establish why the stock moved.
The market response
Price baseline: report-date close; announcement time unavailable. The source does not identify whether this report was before or after trading. These are subsequent daily returns, not a verified immediate earnings reaction.
The first measured session returned +1.58% from the stated baseline. The five-session return was +2.11%, and the 20-session return was +3.30%. SPY returned -3.74% across the corresponding window. Relative volume was 1.28 times the preceding 20-session average.
This edition is a source-based earnings-result and market-response analysis. A full financial-statement and conference-call dossier is not yet attached.