Costco Wholesale which is a warehouse club that provides a wide selection of merchandise, founded in 1983 in Seattle.
The company logo was probably designed based on Futura Extra Bold Oblique, manually slanted and extended. Futura is a commercial typeface by Paul Renner available in multiple weights and you can view more details about it here.
Download Futura Font
The Futura font identified above is not available for free, please follow the link above and purchase the font. Meanwhile, you can take a look at our collection of fonts for cars, pop music and apparel as well as round-ups of new & fresh fonts around the web.