Costco Wholesale's Shares Outstanding (Diluted Average) fell 8.45% to $444.5 million in Q4 2025 from the same period last year, while for Nov 2025 it was $444.5 million, marking a year-over-year decrease of 8.45%. This contributed to the annual value of $444.8 million for FY2025, which is 0.99% up from last year.
According to the latest figures from Q4 2025, Costco Wholesale's Shares Outstanding (Diluted Average) is $444.5 million, which was down 8.45% from $444.8 million recorded in Q3 2025.
Over the past 5 years, Costco Wholesale's Shares Outstanding (Diluted Average) peaked at $444.9 million during Q1 2022, and registered a low of $444.3 million during Q2 2021.
Its 5-year average for Shares Outstanding (Diluted Average) is $444.6 million, with a median of $444.7 million in 2021.
Its Shares Outstanding (Diluted Average) has fluctuated over the past 5 years, first grew by 17.29% in 2021, then fell by 9.69% in 2023.
Quarter analysis of 5 years shows Costco Wholesale's Shares Outstanding (Diluted Average) stood at $444.6 million in 2021, then decreased by 0.02% to $444.5 million in 2022, then fell by 0.03% to $444.4 million in 2023, then rose by 0.11% to $444.9 million in 2024, then fell by 0.08% to $444.5 million in 2025.
Its last three reported values are $444.5 million in Q4 2025, $444.8 million for Q3 2025, and $444.8 million during Q2 2025.

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