SINKScore sheet
Independent sustainability scoreCostco Wholesale
Retail (non-fashion) · Issaquah, Washington, US
29/100
Significant gapsJoint 41st of 48 in Retail (non-fashion)
Strongest
- Emissions from its own operations7/10
- How openly it reports7/10
Weakest
- Whether its emissions are falling3/10
- Its climate targets3/10
Evidence level
Full
Sources
10
Method version
v2.5.16
Date scored
19 October 2026
Scored out of 100 on the same ten questions as every company we score. Every source is listed on the live page. Fees pay for the review, never the result. Scores can go down as well as up.
Live score, reasoning and every source
sinkproject.com/company/costco-wholesaleThis sheet shows the score on the date above. The live page is always current.