Does GDPR apply to US companies?
Yes, GDPR can apply to a US company even when it has no office in the EU.
Article 3(2) can apply to processing connected with offering goods or services to people in the Union or monitoring their behaviour in the Union. Territorial scope depends on actual activities, not simply headquarters location.
What should you do next?
If you are unsure whether Article 27 applies to your organisation, use the EURepNow eligibility assessment before purchasing representation.
Primary legal reference: Regulation (EU) 2016/679 — Articles 3 and 27. Official text.