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Net Net: Promoting innovation and managing change

Twitter Quitter: Kass Says He's Done With 'Haters'

Douglas Kass at the Reach poker tournament in New York.
Amanda Gordon | Bloomberg | Getty Images

Doug Kass has had it with the haters and declared his intent Monday to leave Twitter and his 62,000 followers behind.

The head of hedge fund Seabreeze Partners emailed his clients this morning to inform them that he's had it with the popular social network site.

In his more than 12,000 tweets, Kass had been known as one not shy from debate about his numerous market-moving positions. His highlights include a prescient bearish call on Apple last year, and he was one of the few market experts to take a dim view on Warren Buffett's flagship company, Berkshire Hathaway.

In fact, Buffett invited Kass to the company's annual meeting this year to state his bearish position, an unprecedented measure.

(Read More: Doug Kass: Fear the Market's 'Aha' Moment)

He has been consistently bearish during the current market rally and has taken substantial heat for his position that stocks are overvalued and headed for a fall.

But he said he's grown tired of the constant procession of personal attacks and is packing it in.

"After all these years, especially since I have a contrarian streak, my skin is thick, but I have come to the conclusion that tweeting is simply not worth the time or effort," Kass said in the email.