'Do' and 'does' are both forms from the existing indefinite tense with the verb 'to complete.' Which 1 you can expect to use will generally rely upon the sentence's topic. Their usage is almost similar, except for 1 instance where You need to use 'do' instead of 'does.' There https://financefeeds.com/circle-stock-soars-over-530-since-ipo-as-stablecoin-momentum-builds/