I personally suspect MP owns quite a few shares in most of the listings on Havelock, just so that he can dump them if they threaten to actually succeed as businesses.
That won't have much impact actually because said businesses already raised IPO money, unless he messes with the IPO process, which he did several times. Most Havelock listings are not actual shares that give control in the company so you don't impact the company much by buying them after IPO ends.