Hacker News Reader

Then he probably is the biggest shareholder now. Based on public data Vanguard and Morgan Stanley were the biggest with about 8.5% each.

2nd according to https://whalewisdom.com/stock/twtr, behind CALAMOS ADVISORS LLC. Though they are listed as a PRN, not sure what that means.

Think that means the shares are options contracts. I don't think they own the underlying shares?