New to premerger notification?
- Start by reading Introductory Guide I, What is the Premerger Notification Program? (PDF) and Introductory Guide II, To File or Not to File (PDF), for background about the program.
- Then review Frequently Asked Questions for help with basic inquiries about the HSR filing requirements.
- For help in determining whether to file, check out Steps for Determining Whether an HSR Filing is Required and the Aggregation Summary.
- When you are ready to fill out an HSR Form, refer to the HSR Style Sheet, the Form Tip Sheet (PDF), the NAICS Overview, and the Checklist for Filing.