KKR & Co. offered about $3.68 billion for Gardner Denver Inc., the industrial equipment maker that’s courted takeover interest from at least eight firms since October, said a person familiar with the matter. The stock rose.

The New York-based buyout firm offered $75 a share, according to the person, who asked not to be named as the process is private. Vikram Kini, a spokesman for Gardner Denver, didn’t return phone messages seeking comment on KKR’s bid, which was 11 percent higher than yesterday’s closing price.

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