You mentioned that you owned a company for 2.5 years, and then due to certain reasons, you had to shut it down. In my opinion, yes, you should mention it on your resume as it could be an advantage for you. Just provide all the valid documents and reasons explaining why you had to close it down after successfully running it for 2.5 years.
I believe what matters are the experiences you gained during those 2.5 years. A good organization is always looking for experienced individuals. With that said, I wish you all the best in your job hunt and new role. Be confident, showcase your leadership qualities, and highlight your problem-solving skills.
With regards,
AGD