How many clients does SEI have?

Could you possibly clarify for me the exact number of clients that SEI currently holds? I'm quite interested in understanding the scope of their business operations and how they are faring in terms of clientele. It would be helpful if you could provide me with a specific figure or, if not available, an estimated range. Additionally, would you mind sharing any insights into the types of clients they typically attract or any notable clients they might have? This information would greatly assist me in comprehending the market position and client base of SEI. Thank you in advance for your assistance.