Pros Holdings Inc. (NYSE:PRO), a U.S. provider of revenue management software to airlines and other industries, is exploring options that include a potential sale, according to people familiar with the matter. Pros, which has struggled to return to profitability, is being advised by investment bank Qatalyst Partners in its discussions with potential acquirers, the sources said. Many of the suitors are private equity firms whose offers Pros has rejected, the sources added.

The buyout rms have so far been unable to come up with an attractive deal because of the company's losses, and it is possible that negotiations conclude without an agreement, the sources said. The sources requested anonymity because the matter is confidential. Spokespeople for Pros and Qatalyst did not respond to requests for comment.