Earnings research

Earnings Stock Analysis: How to Research a Company After Earnings

A continuously refreshed research note connecting current market developments with a repeatable stock-analysis workflow. Updated September 26, 2026.

Current update — September 26, 2026

On Thursday, September 24, Costco posted a robust Q4 FY26: net sales rose 11.2% to $93.9B and total revenue reached $95.7B. Reported comparable sales grew 9.4% (6.7% ex‑gas/FX) with digitally enabled sales up nearly 20%. Membership fees advanced to $1.85B in the quarter ($5.91B for the year). EPS was $6.75, including a $0.15 per‑share non‑recurring benefit tied to IEEPA tariff refunds, partly reinvested in member value. Below we break down what actually changed in revenue, comps, margins, cash flow, and one‑time items—and how each input should (or shouldn’t) flow into FY27 models and Costco’s multiple.

Research workflow at a glance

Step 1

Revenue

Separate durable growth from one-time effects.

Step 2

Margins

Check operating leverage and cost pressure.

Step 3

Cash flow

Confirm whether earnings convert into cash.

Step 4

Guidance

Rebuild valuation assumptions after management updates.

Revenue and comps: separating price, mix, and gas

Headline comps rose 9.4% in Q4, but the ex‑gasoline and FX comp was 6.7%, giving a cleaner read on unit growth and mix. U.S. comps were 10.7% reported (7.2% adjusted), with international comps also positive despite currency. Digitally enabled sales grew ~19.5%, reinforcing omni‑mix tailwinds into FY27. For modeling, treat the ex‑gas comp as the baseline run‑rate; then layer in local fuel price scenarios to build a “reported comp” band. The outsized U.S. contribution supports slightly higher traffic and ticket assumptions domestically than abroad, but FX translation remains a swing factor for Canada and Other International.

Membership fees: recurring engine still accelerating

Membership fees were $1.85B in Q4 and $5.91B for FY26. Given fee revenue’s high margin and cash nature, we anchor FY27 fee growth primarily to warehouse openings and renewal/upgrade mix rather than topline sales. Store count ended the year at 939 locations (647 U.S. and Puerto Rico). A modest improvement in Executive penetration can add basis‑points to margin without requiring promotional risk. In valuation, consider a sum‑of‑the‑parts view that capitalizes fee income at a lower discount rate than merchandise EBIT, reflecting its durability.

Research the ticker while the context is fresh

Download Simple AI Stock Valuation and generate a structured research report for a supported stock or ETF instead of rebuilding the same workflow across separate filings, spreadsheets, charting, market-data, and news tools. Review the report first; if the workflow saves you time, continue with the paid subscription or in-app purchase option that fits your research needs. Eligible subscriptions include a 3-day free trial.

Margins and one‑offs: don’t over‑capitalize

Merchandise costs and SG&A rose with volume, but EPS benefited from a one‑time ~$0.15 from tariff refunds (net of partial reinvestment). Strip this out before setting FY27 EPS bridges. With gas a material driver of reported comps but not necessarily gross margin dollars, sensitivity‑test fuel price paths separately. Also note the uptick in interest income and other ($253M in Q4) with rates elevated—use a forward curve to avoid over‑earning this line if cash balances normalize.

Cash, debt, and reinvestment capacity

Cash and equivalents closed at $20.2B with short‑term investments of $1.1B. Long‑term debt fell to $3.9B (ex‑current), while the current portion rose to $2.25B—timing to watch for any near‑term refinancing. The balance sheet comfortably supports continued warehouse growth and selective vertical integration. For DCFs, higher rates lift discount factors but also increase interest income; net the two rather than assuming a unilateral valuation headwind.

What to monitor next

Management scheduled a Q4 call on September 24 and typically reports monthly sales; September sales should arrive in early October. Focus on: (1) traffic vs. average ticket in U.S. warehouses; (2) Executive penetration and renewal rates; (3) gas price trends relative to ex‑gas comps; and (4) any commentary on member‑value reinvestment that could pressure near‑term margins but lift lifetime value. Keep FY27 comps tied to ex‑gas trends while bracketing fuel and FX.

Manual research versus a structured report

The app is not a substitute for judgment. Its advantage is reducing repetitive collection and organization so you can spend more time reviewing assumptions, source quality, valuation sensitivity, and risk.

Research task	Manual workflow	With Simple AI Stock Valuation
Gather inputs	Open filings, data pages, charts, and news separately.	Generate one structured report for a supported ticker or ETF.
Valuation	Build and maintain spreadsheets and assumptions yourself.	Review DCF and other valuation context alongside the source material and assumptions.
Cross-check risk	Manually reconcile fundamentals, technicals, scenarios, and recent events.	Review those research dimensions in a repeatable report workflow.
Output	Save notes across multiple tools or documents.	Keep a downloadable PDF research artifact for later review.

Sources and further reading

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