Making

When Bowerman took his idea to several existing shoe companies, he was literally laughed at. In fact, every single company turned him down. Though rather discouraged, Bowerman persevered and went on to form his own company, making NIKE athletic shoes.

I would like to know the meaning of "making" in "making NIKE athletic shoes"
1. who made = and he made (he=Bowerman)
2. which made = and it made (it=his own company)
3. so it made (it = Bowerman persevered and went on to form his own company)