A bellwether trial is a test trial involving a case that originates from, and is factually representative of, a large pool of lawsuits filed against the same party (or group of parties) over the same product or action that forms the basis of legal liability. The bellwether plaintiff is typically chosen because he/she is a typical representative of a large group. Bellwether cases are used as test cases to predict how future litigation may turn out, so the parties can evaluate the amount of liability the defendants face, if any. Bellwether trials are commonly used in mass tort actions, which occur when thousands of individuals are injured by the same defective product, and the federal courts consolidate them into one giant case called a Multi-District Litigation (MDL).
Where Does the Term ‘Bellwether’ Come From?

What is Multi-District Litigation?
Multi-District Litigation is a federal legal procedure that speeds up litigation when many claims are made against one party in different federal district courts. An MDL Panel, consisting of 7 judges from different circuit courts, decides whether or not an MDL is necessary. Once an MDL is established, the judge and related attorneys choose which lawsuits will be included in the bellwether trials. The cases chosen are meant to represent the broad range of cases related to the MDL.
What are the Benefits of a Bellwether Trial to Plaintiffs?
Bellwether trials benefit plaintiffs because they allow them to test a few stronger and weaker cases to gauge the realistic settlement value for the bulk of the cases. Bellwether trials allow plaintiffs to select the strongest cases to go first, so early results and expectations are not driven by poor-quality cases and/or inexperienced attorneys.
What are the Benefits of a Bellwether Trial to Defendants?
For the defendant, a Bellwether trial lets them test the strength of the plaintiff’s stronger cases while also putting up the cases they see as stronger to show the cases are not all guaranteed wins for the plaintiffs. It also lets them prepare a defense for each case in a timely manner, rather than being overwhelmed by trial after trial falling at the same time in courts across the country.
What are the Benefits of a Bellwether Trial for the Judicial System?
For the judicial system, bellwether trials allow cases to be disposed of in an orderly fashion, without inconsistent rulings across different courts muddying the waters for evaluation. By trying them in a set, determined order in the same court, the parties can evaluate the cases in bulk and hold settlement discussions in bulk — thereby increasing the chances of settlement. Additionally, parties can test and resolve key issues of expert testimony reliability and admissibility in one hearing that applies to all cases, rather than repeating the same hearing in every case.
Bellwether trials serve as an indicator of future trends in the legal industry. Bellwether trials offer a unique advantage when no other option exists for handling a massive caseload. Bellwether trials do not guarantee the same verdict across an MDL; they simply serve as a representative example of the situation at hand and how best to handle it.
Examples of Mass Tort Claims With Bellwether Trials
Many mass tort claims in recent history have involved bellwether trials. Several of these are still ongoing multidistrict litigation cases. Some examples of recent bellwether trials include the Bard hernia mesh bellwether trials, and the Johnson & Johnson Talc bellwether trials. Bellwether trials are anticipated to come shortly in these mass tort litigations:
- Lawsuits Over Baby Formulas Causing NEC in Premature Babies
- Lawsuits Over Firefighter Foam Causing Cancer
- Lawsuits Over Hair Relaxers Causing Cervical Cancer
- Lawsuits Over Bard Hernia Mesh
How Do I Get My Case to Be the Bellwether Case?
You cannot simply decide to be the bellwether case. Bellwether cases are usually chosen by a method the judge sets out after conferring with the plaintiffs’ and defendants’ counsel. Usually, the judge lets the plaintiffs’ steering committee select some, the defense attorneys select some, and the judge selects some. It is not uncommon for the judge to select six, the plaintiffs’ steering committee to select six, and the defense to select six. Then, the cases are tried one by one until a global settlement is reached or they are all tried.
What is a Plaintiffs’ Steering Committee?
The plaintiffs’ steering committee is a group of attorneys representing plaintiffs in the MDL who have been chosen to represent the “class” in making decisions about which cases will be the bellwether cases and what the process will be.