That type of search always looks like it should be simple to do in FileMaker but turns out not to be all that simple.
Best way I know is to define a calculation field and then search on the calculation field.
Two different calculations that will work here:
LeftWords ( Company ; 1 )
Substitute ( Company ; " " ; "_" )
Either option lets you enter "baker" into this calculation field and your search for "baker" will work. The second option turns a typical multi-word company name into a single name which would allow you to search your table by specifying more than just the first name.