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.