The passing of Matt Kwasniewski-Kelvin, co-founder of black midi, has been confirmed.
The London musician was instrumental in the band's formation, playing guitar and providing vocals during their remarkable early live performances. black midi received immediate praise, with Matt contributing to their debut album, the 2019 release ‘Schlagenheim’.
After leaving the band, he stated that his departure was to prioritize his mental health. His bandmates expressed their support, saying, “We’re all fully behind our best mate in his recovery and can’t wait until we can all be together and play again soon!”
Earlier today, Rough Trade Records confirmed the sad news of Matt Kwasniewski-Kelvin's death.
“It is with profound sorrow that we, as a family, share the news that Matthew Kwasniewski-Kelvin has passed away following a long struggle with his mental health,” the label explained. “A gifted musician and a gentle, loving young man has finally succumbed, despite all efforts. Matt was just 26 years old.”
The statement continued: “He will always be cherished. We encourage everyone to check in with your loved ones to help prevent tragedies like this from affecting our young men.”
Rough Trade Records extends its heartfelt condolences to the Kwasniewski-Kelvin family, who released this statement regarding the tragic loss of founding black midi member Matt—a truly talented individual who will be deeply missed. If you are struggling with mental health... pic.twitter.com/Gqsj25qzSl
— Rough Trade Records (@RoughTradeRecs) January 12, 2026
Fans have expressed their grief over the loss of a remarkable musician whose fierce individuality helped shape black midi's early identity.
Rest in peace, Matt Kwasniewski-Kelvin. His innovative sound opened up new musical possibilities for me. His contributions to black midi have significantly influenced my own musicianship, and I'm heartbroken to learn his life was cut short. Please check in on your friends. 🩷 pic.twitter.com/t5lmMnsxuz— elledog (marten) 💿 (@dumbdogdisco) January 12, 2026
R.I.P Matt Kwasniewski-Kelvin. His performance on Schlagenheim will be remembered forever; remember to reach out to your loved ones
black midi were indeed central figures in the community that formed around the Brixton Windmill venue. The venue took a moment to honor the life of this young musician, calling it the hardest statement “we’ve ever had to make…”
“It’s incredibly emotional reflecting on those exciting times when Matt would arrive for soundcheck after working on air vents (hence the song Ducter) and create some of the finest sounds our small stage had ever experienced, including a night with the late Damo Suzuki.”
“However, while it may appear that someone has everything going for them, the reality can be very different. So please take the time to read the message from his family in slide #2 and keep checking in on each other to help prevent tragic news like this.”
“RIP Matt, you were such a wonderful person.”
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It has been confirmed that Matt Kwasniewski-Kelvin, co-founder of black midi, has passed away. The London musician played a key role in leading the group, alongside Matt.