Do planets form around lone stars, multiple stars, or both? Do we know this yet?
There are currently 3424 planets identified (including those in the Solar System and unconfirmed exoplanets). Of these, 3310 are confirmed exoplanets.

Out of the 3424, 180 are in binary (or multiple) star systems. Of those, 28 are circumbinary. I am not certain if any circumternary planets have been identified, though I know some circumternary disks have.

It is more difficult to identify circum-n-ary planets than those that only revolve around one star, so these numbers might not precisely represent the actual proportions.

Source:


Open Exoplanet Catalogue