Costco Wholesale (COST) Stock Price vs Diluted EPS
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From Q1 2025 to Q1 2026, Costco's Diluted EPS grew from $4.50 to $4.58 per share, a modest 1.8% year-over-year increase. Over the same period, the stock price declined from $961.55 on November 27, 2025 to $941.75 on June 2, 2026, representing a 2.1% drop. This combination indicates valuation compression: investors were willing to pay less per dollar of earnings despite the company's continued earnings growth. Since June 2024, Diluted EPS has increased 21.4% (from $3.78 to $4.58), while the stock price over the same window moved from $815.39 to $941.75, a 15.5% gain, suggesting the stock has underperformed the earnings growth trajectory. The near-zero correlation of -0.01 between stock price movements and EPS changes over this two-year period reflects that stock price swings have been driven largely by factors other than reported earnings performance.
Diluted EPS was $4.58/share as of 2026-02-15 (10-Q); the stock traded at $1018.48. Not enough overlapping price and reporting history yet for a year-over-year comparison.
Latest close: 946.16 USD (2026-06-02).
Diluted EPS | recent SEC reports
| Report date | Diluted EPS | Period |
|---|
| 2026-02-15 | 4.58 USD/share | Q2 10-Q |
| 2025-11-23 | 4.50 USD/share | Q1 10-Q |
| 2025-05-11 | 4.28 USD/share | Q3 10-Q |
| 2024-11-24 | 4.04 USD/share | Q1 10-Q |
| 2024-05-12 | 3.78 USD/share | Q3 10-Q |
| 2023-11-26 | 3.58 USD/share | Q1 10-Q |
| 2023-05-07 | 2.93 USD/share | Q3 10-Q |
| 2022-11-20 | 3.07 USD/share | Q1 10-Q |
Sources: autario.com/data/stock-cost-costco-daily-prices · autario.com/data/costco-wholesale-diluted-eps-sec-filings | data verified and hosted on autario.com.