They are all active on Instagram. ER was right about his brother, he became successful and well liked and drooled over by girls all over the internet. In their posts you will frequently see people talking about ER and shaming them, especially his stepmother as she is a horrible person, his father too. His childhood friend he talked about in the manifesto, Monette, is also active over there. The fate of his friends that he once had are unknown to me, I never looked them up.
Elliot's father does not have a big and very successful career as much as his peers, but he frequently posts photography things. His stepmother is a Kim Kardashian wannabe. His biological mother does no seem to have online presence.
I would like to know what happened to James, his only and final friend he ever had. I felt horrible reading his manifesto and could feel his words when he was talking about his only friendship ending, his only friend turning away from him and him becoming completely alone, and the only people he actually talked almost like a human were the 2 people that were paid in SB to be his social tutors. It's really, really sad how it all went down and how ER was right about his brother, really sad. His brother became everything that he hated and said he would be, I bet his stepmother gets off to it knowing how she is and what she said to ER's face one day, that his brother would be good with girls and expected to not be a virgin at 16 (he probably was not way before that.)