The better and more important question would be whether they were put in a benchmark like the Russell 1000 since it would force mutual funds to consider whether they should own it.
Russell excludes stocks trading below $1, stocks that trade on the pink sheets and OTC Bulletin Board, closed-end mutual funds, limited partnerships, royalty trusts, non-U.S. incorporated stocks (other than the benefits driven incorporations described above), foreign stocks, and American Depositary Receipts (ADRs). Hence registration on a stock exchange would be a pre-requisite to index inclusion. For example, Facebook, despite being valued at 80-100 billion US dollars, is not in the Russell index universe.
All public companies are C corporations. I'm trying to see if there is a requirement in the SEA or NYSE listing standards that mandate, this, but given the NYSE's requirement of fiduciary responsibility to shareholders, B corps produce a legal conflict of interest.
The better and more important question would be whether they were put in a benchmark like the Russell 1000 since it would force mutual funds to consider whether they should own it.