The company, whose valuation is more than US$1 billion ($1.32 billion), could also raise capital via other routes including an initial public offering or seeking funds privately, they said.
Discussions are preliminary and no final decision has been made, the people said. Representatives for Credit Suisse, Goldman Sachs and One Championship declined to comment.
One Championship is backed by investors including Sequoia Capital and Singapore state investment firms Temasek Holdings Pte and GIC Pte, according to its website. Its events span martial arts and combat sports including Muay Thai, kickboxing, karate and Taekwondo and are broadcast in more than 150 countries.
