The corporate rename does not change who your spouse is or the marriage that qualifies her, so it does not by itself alter her inclusion. It changes nothing about her costs either: a joining legally married spouse still carries US$15,000 and a US$1,000,000 gift. Her case still follows yours.
A derivative spouse's file when the sponsor's name changes
Do not refile her as a separate matter to 'match' the new name; note the change in the existing file as the instructions provide. If she was never included, adding her later is neither impossible nor free — initial inclusion is officially recommended for the program's benefits, and a later addition still carries its own $15,000 and $1,000,000. A family member already admitted as a permanent resident is not stripped of status by a corporate amendment.
Only a spouse and unmarried children under 21 count as accompanying family. A parent’s ability to make a payment does not itself decide a child’s derivative treatment.