I have just started a small company offering small IT solutions (statistical analysis, web design, etc.) for companies.

We are two owner of the company, so it's not a sole proprietorship company. I don't know how to speak of my ownership on my cv. I don't want it to sound too pretentious and I want to clearly emphasize that it's a small company started by myself, so I am not sure if Managing Partner is appropriate.

As a description, I have written that it's a self-owned company. Are there any business terms to classify my situation. It is indeed a partnership and I hope the business will grow to have employees some day, so it's definitely not a sole proprietorship.