Transgender runner Sadie Schreiner is suing Princeton University after the school allegedly excluded the athlete from a May 3 women’s race.

Schreiner’s lawsuit states that the athlete sought to compete in the women’s 200-meter race at the Larry Ellis Invitational. Schreiner was among 141 participants who were unaffiliated with any university or club. However, the lawsuit claims that officials informed Schreiner she was not allowed to race just 15 minutes before the event started.

“I do not want to assume, but you are transgender,” a Princeton official allegedly told Schreiner, per the complaint.

The lawsuit contends that the actions of the two Princeton officials disregarded Sadie’s rights as a transgender woman, which are protected by New Jersey law, leading to emotional and physical harm for Schreiner.

Schreiner claims the university breached the New Jersey Law Against Discrimination, which includes “gender identity or expression” as a protected category.

Fox News Digital has reached out to Princeton University for a response.

Schreiner previously competed for Rochester Institute of Technology’s (RIT) women’s track and field team and gained national notoriety for dominating female opponents and frequent social media videos boasting about it as an openly transgender competitor.

However, Schreiner was ruled ineligible to compete for RIT after the NCAA revised its gender eligibility policy Feb. 6, one day after President Donald Trump signed the “Keeping Men Out of Women’s Sports” executive order on Feb. 5.

RIT provided a statement to Fox News Digital confirming this on Feb. 12.

“We continue to follow the NCAA participation policy for transgender student-athletes following the Trump administration’s executive order. Sadie is not participating in the next meet,” the statement said.

Schreiner then competed at the USA Track & Field Open Masters Championships on March 1.

There, Schreiner competed in the women’s 400-meter dash and 200-meter dash, taking first place in both events.

Schreiner won the 400-meter dash by default, as the other participants in the event, Anna Vidolova and Amaris Hiatt, had no recorded times and were listed as DNS (did not start).

In the 200-meter dash, Schreiner defeated 14-year-old runner-up Zwange Edwards, 16-year-old third-place finisher Zariah Hargrove, 15-year-old Leah Walker and 18-year-old Ainsley Rausch. That event also had multiple participants listed as DNS, including 18-year-old Jordan Carr, 46-year-old Amanda Taylor, Vidolova again and 16-year-old Paula Damiens.

However, weeks after that, Schreiner posted an Instagram video claiming to have likely competed in Schreiner’s last organized track meet in the U.S. after a USATF event in Maine.

“I very likely just ran what will be my last meet in the United States,” Schreiner said, later adding, “I will find a way to keep competing, but I doubt that will be in the United States.”

Schreiner said USATF changed its policy on transgender eligibility from the one used by the International Olympic Committee (IOC), which allows biological males to compete in the women’s category, to the one used by World Athletics, which bans any athlete who has undergone male puberty from competing as a woman. The USATF’s official transgender eligibility policy does now reference the World Athletics guidelines on its official webpage. It previously referenced the IOCs policy, as seen in an archive via Wayback Machine.

Schreiner has been a controversial figure in women’s track and field in the past year, especially after an appearance at the 2024 NCAA Division III Outdoor Track & Field Championships in May.

Earlier that month, Schreiner competed at the Liberty League Championship and won both the women’s 200- and 400-meter, breaking the 400-meter record in the process. Schreiner would have finished last by more than two seconds in the men’s competition.

In late January, Schreiner bragged after winning an event against female opponents.

“Not the race I was looking for at all this week, my spikes nearly fell off on the turn and with a poor start my time wasn’t nearly what I wanted,” the runner wrote in an Instagram post.

“The good news is that the season just started, and I’m going to leave everything on the track at nationals,” Schreiner added with a transgender pride flag emoji.

On Jan. 17, Schreiner took first place in the 200- and 400-meter dashes at the Brockport Friday Night Rust Buster, taking top spots over two female seniors. In the 200-meter dash, Schreiner beat RIT teammate Caroline Hill by 1.5 seconds and took first place in the 400-meter dash from Brockport’s Marissa Wise by nearly 3.5 seconds. Schreiner’s results achieved automatic qualification for the All-Atlantic Regional Track and Field Championships.

On Jan. 24, Schreiner took first place in the 200-meter dash at the RIT Friday Meet, beating out Liberty League junior Lexi Rodriguez of Brockport with an even faster time. On Jan. 30, Schreiner took first place in the 200- and 400-meter dashes against Liberty League opponents.

Schreiner also spoke out against states and colleges that were not offering the trans athlete a full scholarship when Schreiner wanted to transfer in December. The athlete blamed laws in 25 states that prohibit trans athletes from competing with girls and women.

“Among all the hurdles transfers usually have, there is an extra layer because it is trans, 50% of the country banned me from participating and that meant I couldn’t attend any of those colleges even if they reached out to me with a full ride,” Schreiner said.

“It also became clear that states that did, no matter how adamant the coaches were to have me on their teams, the college administrations would usually stop them from allowing me to participate.”