Naa, it may be not exactly the same, that's right. But I own still 1 Bitcoin after I spent it for a share. This Bitcoin has a double-usage: For the company to buy things like asics, and for me as a sleeping money ...
No you no longer own 1 Bitcoin, you own a share in a company and while it may have the same value as 1 Bitcoin, it isn't a Bitcoin. If you spent 400 Bitcoins and bought a car would you also say you still own 400 Bitcoins? You may have a car and that car may be worth 400 Bitcoins (today) but it isn't 400 Bitcoins. The money supply hasn't inflated, money was simply transfered.
A transfer of wealth is never inflationary.