Health-Care Marketing Firm Klick Said to Explore Stake Sale

Klick Health, a digital marketing agency for the health industry, is exploring the sale of a minority stake, people familiar with the matter said.

The company, whose backers include GTCR, is working with advisers to sound out potential interest from private equity firms, according to the people. Klick could be valued at $2 billion to $3 billion in a transaction, the people said.

GTCR, which owns a minority stake in Klick, may exit its investment as part of a deal, the people said, asking not to be identified because the information is private.

The company’s deliberations are in ...