Costco Wholesale (COST) Shares Outstanding (Diluted Average) (2009 - 2026)

Costco Wholesale has reported Shares Outstanding (Diluted Average) for 18 years, with the latest figure at $444.4 million in Q1 2026.

• For the quarter ending Q1 2026, Shares Outstanding (Diluted Average) changed 0.1% year-over-year to $444.4 million; the trailing twelve-month figure through Feb 2026 stood at $444.4 million (changed 0.1% YoY), and the FY2025 full-year result was $444.8 million, changed 0.01% from the prior year.
• Shares Outstanding (Diluted Average) for Q1 2026 stood at $444.4 million, roughly flat from $444.5 million in the prior quarter.
• The five-year high for Shares Outstanding (Diluted Average) was $444.9 million in Q1 2022, with the low at $444.4 million in Q2 2023.
• Historically, Shares Outstanding (Diluted Average) has averaged $444.7 million across 5 years, with a median of $444.8 million in 2024.
• Annual changes were most pronounced in 2024 — Shares Outstanding (Diluted Average) advanced 0.11% — and 2026, when it declined 0.1%.
• Costco Wholesale's Shares Outstanding (Diluted Average) stood at $444.5 million in 2022, then dropped by 0.03% to $444.4 million in 2023, then grew by 0.11% to $444.9 million in 2024, then slipped by 0.08% to $444.5 million in 2025, then slipped by 0.02% to $444.4 million in 2026.
• The last three Shares Outstanding (Diluted Average) figures came in at $444.4 million (Q1 2026), $444.5 million (Q4 2025), and $444.8 million (Q3 2025), per Business Quant data.