Exclusivity is a commercial milestone, not itself a rule deciding derivative family eligibility. Review the principal’s qualifying case and the spouse’s and children’s actual status process. An eligible legally married spouse and unmarried children under 21 may qualify, but the supplier’s milestone guarantees neither admission nor a common travel date.
Plan each person's application separately
Compare household costs with the business income realistically available under current non-exclusive terms. If the family depends on a spouse working, confirm qualifying E spouse status and the applicable proof before counting on employment; children gain no work permission from dependent status. Discuss whether staggered arrival is practical while preserving the individual eligibility and document requirements. A hoped-for exclusivity date should not substitute for those immigration steps.
The principal must still establish treaty nationality, qualifying enterprise ownership, power to develop and direct through half ownership or genuine operational control, and substantial lawful capital that is irrevocably committed and at risk. Keep proof of the marriage and each child's birth ready for the consular interview, and remember that E-2 gives the family no path to permanent residence on its own; if that is the goal, it should be discussed as a separate question.