In Their Own Words… DOJ Official Ronald Fiorillo on the DOJ’s Antitrust Whistleblower Rewards Program

Posted March 11, 2026

By the Constantine Cannon Whistleblower Team

Earlier this month, Ronald Fiorillo, a DOJ Antitrust Division trial attorney involved in the DOJ’s Antitrust Whistleblower Rewards Program, joined the GCR Live: Cartels 2026 panel and discussed the DOJ’s new program.[1]

What Is the DOJ’s Antitrust Whistleblower Rewards Program?

Launched in 2025, the DOJ’s Antitrust Whistleblower Rewards Program offers financial rewards—up to 30% of the criminal fine or recovery—to eligible whistleblowers who report original information about antitrust violations, such as bid-rigging, price-fixing, and market allocation schemes. You can find more information about the program in our prior posts analyzing it (here and here).

Fiorillo’s Recent Comments on the DOJ Antitrust Whistleblower Rewards Program

According to Law360’s reporting on the panel,[2] Fiorillo provided several important insights on the DOJ’s Antitrust Whistleblower Rewards Program, as well as its interaction with the DOJ’s leniency program for those who self-report violations to the government:

- Fiorillo noted that the DOJ’s new Antitrust Whistleblower Rewards Program is “a complement” to the DOJ’s leniency program, which “is still a cornerstone of [the DOJ’s] enforcement mechanisms.” “That significant carrot still does exist.”[3]

- However, Fiorillo emphasized that with the introduction of the new whistleblower program, companies deciding whether to seek leniency must act quickly and now must consider whether whistleblowers incentivized by the new rewards program may report to the DOJ first. According to Fiorillo, “The timeframe in which that decision can be made [as to whether to seek leniency] has been compressed a bit by the whistleblower program.” “There’s a group of employees, often those that were carrying out the ends of a conspiracy that now could be bringing us that information” under the whistleblower program, Fiorillo added.[4]

- Fiorillo also noted the broad interpretation of the requisite link to the U.S. Postal Service under the whistleblower rewards program: “If I was your clients, I would be considering the fact that if we use [the USPS mail] now to transact business, there could be a whistleblower that is incentivized by this program. I think it’s that simple and that broad of an effect on the Postal Service.”[5] Under the Memorandum of Understanding governing the whistleblower rewards program, the harm to the Postal Service “need not be material or otherwise pose any substantial detriment to the Postal Service.”[6]

- Fiorillo also shared that the DOJ Antitrust Division is receiving whistleblower reports “on a near-daily basis,” and that new reports are reviewed by “a close, tight-knit group of relatively senior, very experienced people” at the agency.[7]

Constantine Cannon Represents Antitrust Whistleblowers

Constantine Cannon partner Dan Vitelli commented, “The DOJ’s new Antitrust Whistleblower Rewards Program incentivizes whistleblowers to come forward and report antitrust violations to the DOJ. Encouraging this type of reporting supplements and supports government enforcement of the antitrust laws, the ultimate goal of which is to protect markets and benefit consumers.”

Constantine Cannon has significant experience representing antitrust whistleblowers under the DOJ’s Antitrust Whistleblower Rewards Program and the False Claims Act. Our firm was responsible for securing the largest antitrust False Claims Act recovery, among our other successes. The firm is also one of the country’s pre-eminent antitrust law firms, responsible for two of the largest antitrust settlements ever. Learn more about our antitrust litigation and counseling practice and representative cases here. Constantine Cannon’s representations have led to over $1 billion in government and whistleblower recoveries and an additional $5 billion for the firm’s other clients.

If you believe you have a case, please contact us. We will connect you with a member of the Constantine Cannon whistleblower team for a free and confidential consultation.