The 67-year-old actress and Bricklin, 36, who are co-investors in a bar, have regularly denied rumours about dating, reported People magazine.
During an interview, Sarandon said," Jonathan and I collaborate on different things. That means a lot of things."
When asked if that means a romance, she says, "Yeah, I think so."
The actress, who split from actor Tim Robbins in 2009, revealed she decided to leave him after starring in the comedy about death, 'Exit the King,' on Broadway in New York City that year. She said it helped her to form a decision about ending their relationship.
"It's better to have made decisions that turned out badly and learn from them than to feel as if you had no choice and are resentful of the turns that your life takes," she added.