Greenlight Capital's David Einhorn is still very much alive in the richest poker tournament in history.

Einhorn, who finished in 18th place in the World Series of Poker in 2006, is one of 48 people to pony up $1 million to enter the WSOP's "Big One for One Drop" charity poker tournament. The winner will get more than $18 million—Einhorn has pledged to donate his winnings to charity—while Montréal-based clean drinking water charity One Drop will get $5.5 million.

Einhorn has made it to the last table on Day 3 of the event, currently sitting in sixth place out of eight remaining places. He's going to have to make quite a run to win it: Einhorn's 8.4 million chips pale in comparison to the leaders, Antonio Esfandiari and Sam Trickett, who have 39.9 million and 37 million chips, respectively.

Einhorn wasn't the only hedgie at the tables: SHK Management founder Daniel Shak—most recently in the new for suing his ex-wife over her $1 million shoe collection—also participated, although not as successfully. Shak made it to the second day of the tournament and to the final four tables before busting.