Millennium employees are getting to know a whole new batch of colleagues.

Izzy Englander’s $97 billion hedge fund is offering every employee, including investment staff, a “Digital Twin,” a personalized AI assistant who continuously learns from the employee’s working style. The firm already has 1,600 AI coworkers invisibly working across Millennium’s ranks, and it’s now making them available to all 7,000-plus employees in a move to further embed AI into its workforce.

Millennium employees who choose to have a twin can email with them much like they would a colleague, Diana Meditz, the firm’s AI product manager, said in a Q&A in a blog post…