He died on Friday of a heart attack, according to Variety magazine.

Jordan was founder and chief executive of Career Artist Management. His management company also looked after other big names clients such as Miguel, The B-52s, Elle King and Rick Springfield.

Since the tragic new broke, tributes have been pouring in this morning from industry players. Sheryl Crow wrote on Twitter: "So sorry to hear of Jordan Feldstein’s passing. His loss will be long felt by those who knew him. Thoughts and prayers for his family and his wonderful artists."

Tidal Vice President of Culture & Content, Tony Gervino wrote: 'Awful news. Jordan Feldstein was fiercely protective of his artists and their art and always delivered good or bad news personally. A mensch. RIP.'

Woke up today to a huge unexpected loss. Just wanting to send my condolences to Jordans kids, his family and friends, I can't imagine how difficult this is for them to process. It's crazy to know that in our short time, Jordan already made real dreams of mine reality. We were/ are just getting started and it's just sad because i could see years of friendship and success together. Still I'm grateful to have gotten to know and learn and work w Jordan in our short time... to get a sense of the rare kind of person he was. If he said it, he made it happen. Man, I didn't think yesterday would be the last time we'd speak. Rest in power Jordan, you're already missed

A post shared by Miguel (@miguel) on Dec 23, 2017 at 11:43am PST

#rip Jordan , my Close Friend and Manager ?? pic.twitter.com/0XV470BfJ9

— Big Boi (@BigBoi) December 23, 2017

So sorry to hear of Jordan Feldstein’s passing. His loss will be long felt by those who knew him. Thoughts and prayers for his family and his wonderful artists.

— Sheryl Crow (@SherylCrow) December 24, 2017

Massive RIP to Jordy Feldstein... longterm comrade in this crazy music business.. Maroon 5 mgr among many others, thoughts and prayers to his family, his kids, & The @maroon5 family. So sad today ?

— Ryan Tedder (@RyanTedder) December 23, 2017

I dont want to believe this.. this man was such a big part of my life. Heartbroken. No words can explain.. Jordan Feldstein, Maroon 5 Manager and Brother of Jonah Hill, Dies – Variety https://t.co/qqXXkw8aJd

— Neon Hitch (@neonhitch) December 23, 2017