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Prior results do not guarantee a similar outcome. Each case is unique and depends on its own facts.
About Matthieu Parenteau
Matthieu J. Parenteau is a Partner and Trial Attorney at Sweeney Merrigan Personal Injury Lawyers, specializing in catastrophic injury and wrongful death cases in state and federal courts.
Parenteau's notable results include multi-million-dollar settlements of $17 million, $10 million, $10 million, $5.5 million, and $5 million, plus a recent $5.1 million jury verdict in Essex County for a broken-arm case. He earned his Juris Doctor from Suffolk University Law School in Boston and his Bachelor of Science from Portland State University in Oregon. He is admitted in Massachusetts and Maine (state and federal courts).
Honors include Forbes' 2024 Best Car Accident Lawyers Boston, Massachusetts Super Lawyer (2021-2022), and Super Lawyers Rising Star (2016-2020).
Proven verdicts and settlements at Sweeney Merrigan Personal Injury Lawyers
These results are credited to Sweeney Merrigan Personal Injury Lawyers. A result appears under an attorney's own name only when a published source names them as counsel on the case.
The family of Greg Sharrigan, killed when a gas leak ignited at his Maynard home in September 2021, sued Eversource for $450 million, alleging the utility detected the underground leak three years before the fatal explosion and never fixed it.
Peter Merrigan of Sweeney Merrigan Personal Injury Lawyers represented 125 Massachusetts cities and towns in claims against Johnson and Johnson and the three largest opioid distributors, recovering $84.1 million in aggregate from the national opioid settlements.
A Middlesex Superior Court jury awarded $56 million on July 22, 2026 to Malcolm Carnwath, a 78-year-old retired realtor from Newburyport, Massachusetts. An Amazon delivery driver fell asleep and crossed the center line in Portsmouth, New Hampshire, on Nov. 16, 2024, causing a head-on crash. Mr. Carnwath suffered a cardiac arrest, multiple strokes with permanent brain injury, and a below-knee amputation of his left leg. Amazon accepted liability days before the two-day damages trial.
A Franklin County Superior Court jury awarded $10 million in November 2021 to a young woman who testified that a stonemason employed by her father sexually abused her for three to four years, beginning when she was 8. The defendant had been acquitted of criminal charges in 2018. It was the largest verdict in the county's history, and with interest the Greenfield Recorder put it at about $12 million. The plaintiff sued under the pseudonym Jane Doe.
Prior results do not guarantee a similar outcome. Each case is unique and depends on its own facts.
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Prior results do not guarantee a similar outcome. Each case is unique and depends on its own facts.








