Is zakat obligatory on partners' money that reaches the nisab and a hawl has passed over it, knowing that if each individual's share were divided, it would not reach the nisab?

Zakat is not obligatory for someone whose share in the company does not reach the minimum threshold (nisab) by itself, or by combining it with other money he possesses. This is because, according to the majority of scholars, the mixing of wealth does not affect Zakat, except in the case of livestock.