One Form 1095-C for Each Employee of ALE Member
For each full-time employee of an ALE Member, there must be only one Form 1095-C filed for employment with that ALE Member. For example, if an ALE Member separately reports for each of its two divisions, the ALE Member must combine the offer and coverage information for any employee who worked at both divisions during the calendar year so that a single Form 1095-C is filed for the calendar year for that employee, which reports information for all 12 months of the calendar year from that ALE Member.
In contrast, a full-time employee who works for more than one ALE Member that is a member of the same Aggregated ALE Group must receive a separate Form 1095-C from each ALE Member. For any calendar month in which a full-time employee works for more than one ALE Member of an Aggregated ALE Group, only one ALE Member is treated as the employer of that employee for reporting purposes (generally, the ALE Member for whom the employee worked the greatest number of hours of service), and only that ALE Member reports for that employee for that calendar month. The other ALE Member is not required to report for that employee for that calendar month, unless the other ALE Member is otherwise required to file Form 1095-C for that employee because the individual was a full-time employee of that ALE Member for a different month of the same calendar year. In this case, the individual may be treated as not employed by that ALE Member for that calendar month.
From <https://www.theabdteam.com/blog/aca-reporting-for-controlled-groups/>