Sorry, but there is nothing you can do, except politely ask the site to remove it.

If it is doing you demonstratable harm (eg 'brand damage'; 'defamatory'), then you can get your lawyer on to it - but that will cost a lot and it really does need to be damaging info.

The only other option is to make your your company ranks higher than this site, to minimize the damage.

Fo eg, type in paypal - the first site is paypal, but there are 2 anti-paypal sites in the top 5. They have been there for > year and with all PayPals legal might they can do nothing (I am assuming that they tried, but I do not really know)

CBP