High IQ Societies founded by Petros Gkionis

Extreme
Extreme is an exclusive Super High IQ society open to those in the top 0.0031% (at least 160 iq sd 15, 164 iq sd 16) of the unselected adult population. Mensa accepts those who score in the top 2% of the unselected adult population or 1 in 50, you can think of Quasar Quorum as some kind of a hyper Mensa (I wouldn't use this name due to copyright) that accepts 1 in 31.560.

Quasar Quorum 

Quasar Quorum is an exclusive High IQ society open to those in the top 0.043% (at least 150 iq sd 15, 153 iq sd 16) of the unselected adult population. Mensa accepts those who score in top 2% of the unselected adult population or 1 in 50, you can think of Quasar Quorum as some kind of a super Mensa (I wouldn't use this name due to copyright) that accepts 1 in 2330.

Octopus High IQ society

Octopus is another other High IQ society by Petros Gkionis. It is open to those in the top 0.39% (at least 140 iq sd 15, 142 iq sd 16) of the unselected adult population. Mensa accepts those who score in top 2% of the unselected adult population or 1 in 50, you can think of Octopus as some kind of a a more exclusive Mensa (I wouldn't use this name due to copyright) that accepts 1 in 261.

Ivory Tower Assembly High IQ Society

 Ivory Tower Assembly is a High IQ society open to those in the top 2% (at least 130 iq sd 15, 132 iq sd 16) of the unselected adult population. It the third High IQ society made by Petros Gkionis.

Cosmic Cognition Coalition High IQ Society

Cosmic Cognition Coalition is a High IQ society open to those in the top 9.23% (at least 120 iq sd 15, 121 iq sd 16) of the unselected adult population.  It is the fourth High IQ Society founded by Petros Gkionis.

Petros Gkionis is the founder of Quasar Quorum. He studied philosophy at KU Leuven and he is currently a member of a few High IQ societies such as:

Mensa Greece, Elite member (>=160 IQ sd 15) of the Grand IQ Society, Myriad High IQ Society, ISI-Society, Catholiq High IQ Society, Nebula High IQ Society, Prudentia High IQ Society, Atlantiq High IQ Society. He is also the President and Founder of Extreme, a 4σ Super High IQ society for >=160 IQ sd 15. 

He was interviewed by Scott Doyglas Jacobsen, you can find the interview here.