Variety says...

Charles Koppelman, a veteran music executive whose career spanned four decades before he became a top executive at Martha Stewart and Steve Madden’s companies, died Friday at the age of 82. The news was posted on social media his son Brian, showrunner of “Billions,” and daughter Jenny Koppelman Hutt. No official cause of death was given, but Brian wrote, “He spent his last days surrounded by those he loved the most.”

It is no overstatement to say that Koppelman was one of the most formidable industry executives of the past 50 years. Over the course of his decades in the music business, Koppelman worked with everyone from Barbra Streisand and the Lovin’ Spoonful to Prince and Vanilla Ice. He began his career as a singer but quickly became a top-flight publisher, working for Don Kirshner’s Aldon Music, with Clive Davis at CBS Records, and in partnership with longtime Sony/ATV chief Martin Bandier, founded SBK Entertainment, which was sold to EMI in 1989 for $300 million.

it goes on to say...

The company eventually merged with EMI, with Koppelman taking on the CEO role and bringing in Prince’s first post-Warner Bros. album “Empancipation,” although internal politics led to his departure in 1997.

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Prince had an engineer named Michael Koppelman. He's the one who did a couple of podcasts about his time with Prince. He worked on Ingrid's album, "New Power Generation" single, "The Latest Fashion" single, Elisa Fiorillo's album, and work on "Blue Light."

He also worked on "Addam's Groove" by Hammer, Patti Labelle's Burnin' album, Martika's Kitchen, Carmen Electra, Tevin, Jevetta Steele, Mavis, Lois Lane, and many more.

I don't know if they're related or not