Sam Altman, CEO of OpenAI, is among the largest shareholders of Reddit

OpenAI CEO Sam Altman, is one of Reddit's largest shareholders, according to the regulatory document on the social news platform's plans for its IPO.

According to the S-1 document, made public on Thursday, Altman-affiliated entities hold 8.7 per cent of Reddit's outstanding shares. This consists of 789,456 Class A shares and 11.4 million Class B shares. Reddit's largest shareholder is Advance Magazine Publishers Inc, part of the Newhouse family's publishing empire, with about one-third of the voting power.

Altman has long-standing ties to the San Francisco-based social media company. Altman and Reddit co-founders Steve Huffman and Alexis Ohanian were part of the inaugural class of the Y Combinator accelerator in 2005. Altman also briefly served as interim CEO of the company after the resignation of former CEO Yishan Wong.

In the document filed on Thursday, Reddit said it intends to grow its business in part through data licensing agreements with artificial intelligence companies, in addition to working on its own artificial intelligence products. These licensing agreements will allow the company to use its content assets as a generator of more revenue. On Thursday, Reddit announced a deal with Google that included artificial intelligence training, but did not announce a partnership with Altman's OpenAI.