I'm planning on purchasing 90% of a company (current owner will remain a 10% equity holder) via an equity sale. If I purchase 90% of the company for $1.5M am I able to amortize this $1.5M over a 15 year period (i.e. will I be able to deduct $100k against the companies gains over the next 15 years)? Is there any thing specific that I need to do prior to closing or at closing to ensure that I am able to amortize this $1.5M?

Possibly relevant information: the company being acquired is an LLC and will remain an LLC. The 90% of my interest will be held in a holding company (also an LLC).