Bars over time
HSR Merger Filings per Year
Transactions reported to the FTC and DOJ under the Hart-Scott-Rodino Act, by federal fiscal year
Plays the chart through its history. Pauses are where the data set a record or moved most.
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Federal fiscal years, October to September, from the FTC and DOJ annual reports, which arrive about a year after each year ends. The filing threshold rose sharply in February 2001 and has been indexed every year since 2005.
Every U.S. acquisition above the size threshold must be notified before it closes, whoever the buyer. That makes HSR filings the broadest count of sizeable U.S. deals.
What this chart reads
- HSR Merger Filings per Year (Transactions Reported)as “Transactions reported”latest 2025-09-30
Sources
HSR Merger Filings per Year (Transactions Reported). Source: Federal Trade Commission and Department of Justice Antitrust Division, Hart-Scott-Rodino Annual Reports to Congress (ftc.gov/policy/reports/annual-competition-reports), Appendix A, Appendix B and Exhibit A. Public domain: "Most material on the FTC's website is considered work of the United States Government, meaning that the material is in the public domain and is not subject to copyright restrictions (17 U.S.C. 105)" (FTC website policy). Source: United States Federal Trade Commission, www.ftc.gov.
Charts are drawn from Palanor's signal library and recomputed from source data on every view. Transformations (changes, indexing, year-on-year rates) are Palanor's.