Investors of OpenAI are pushing to bring back Sam Altman as CEO, following his ousting by the board. Brad Lightcap addressed the decision in a memo to employees, assuring them that the company remains in a strong position and that the decision was not due to any malfeasance. Microsoft, Tiger Global, Thrive Capital and Sequoia are among the top backers that are part of the effort to reinstate Altman and Greg Brockman, with Sequoia supporting them in whatever they choose to do next.