Do companies make money from offering 401k?

So, let me ask you this: when companies offer 401k plans to their employees, do they actually profit from doing so? It's a common belief that the main benefit lies with the employee, who gets to save and invest for their retirement, often with matching contributions from the employer. But is there a hidden financial incentive for the company itself? Are there fees or other sources of revenue that companies can tap into when offering 401k plans? Let's delve deeper and see if there's more to this question than meets the eye.