public class Company
    {
        // другие свойства

        [Required(AllowEmptyStrings = true)]
        [DisplayFormat(ConvertEmptyStringToNull = false)]
        public int? ManagerID { get; set; } 
        public virtual Person Managers {get; set;}
    }  

public class Person
    {
        // другие свойства

        public virtual ICollection<Company> ManagersList { get; set; }
    }



 public class DB : DbContext
    {
        public DB()
            : base("DBConnection")
        {
        }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
             modelBuilder.Entity<Company>().HasRequired<Person>(s => s.Managers)
            .WithMany(s => s.ManagersList).HasForeignKey(s => s.ManagerID);
        }
        public DbSet<Company> Company { get; set; }
        public DbSet<Person> Person { get; set; }
       //Другие сущности
    }
             

         public ActionResult Index()
        {
            var company = db.Company.Include(c => c.Manager);
            return View(company.ToList());
        }