Alexis Ohanian, a co-founder of social media platform Reddit, resigned from his position as the executive chairman last week, according to The Associated Press.

Last week, Ohanian announced his retirement from the board on his website.

“I co-founded Reddit 15 years ago to help people find community and a sense of belonging.

“I have resigned as a member of the reddit board, I have urged them to fill my seat with a black candidate, and I will use future gains on my Reddit stock to serve the black community, chiefly to curb racial hate, and I’m starting with a pledge of $1M to Colin Kaepernick’s Know Your Rights Camp.

Co-founder and CEO Steve Huffman has stated in a Reddit post that the board would honor Ohanian’s wish to be replaced by a black candidate.