A real estate agent filed a lawsuit on Monday against the brokerage eXp Realty, accusing it of failing to investigate when she reported that she believed she had been drugged and sexually assaulted by a company contractor.

Kirsten Childress, 31, the agent, became the sixth woman to sue the brokerage in the last two years. All have similar claims that they were given a laced drink and then attacked while attending an eXp event.

In May 2023, Ms. Childress said, she flew to Orlando for the three-day eXp Shareholder Summit, where she went to a private networking event that was offered as part of the conference. There, she believes, she drank a spiked cocktail, and hours later, she said, awoke dazed and bruised in an unfamiliar hotel room. The contractor, a real estate photographer, was on top of her and assaulting her, she claims.

“It was the worst moment in my entire life,” Ms. Childress said in an interview at her home in Mooresville, N.C., where she lives with her husband and three children.

The lawsuit, filed in U.S. District Court in Orlando, Fla., names both the brokerage and the photographer, Nicholas Moore, 26, who describes himself on his website as a “trusted photography partner” for several real estate brands, including eXp.

Mr. Moore declined to comment on the lawsuit through a text message and wrote, “Do not contact this number again.” The New York Times first reported Ms. Childress’s allegations in 2023. At that time, Mr. Moore said that Ms. Childress’s statements were “false allegations.”