If you are the only one that received the 1099, then you would need to issue a 1099 to him in order for him to get half of the income. You cannot just split it in half. Then you would take it as a deduction on your taxes as subcontractors paid.
The company should issue the 1099-NEC to the person earning the money, not just one person. So, if you can get them to make the correction, it would be easier than you issuing one to him.