Isabella Whittaker Takes Win in Oslo on Professional Debut for On
Whittaker's Triumph Marks the First Win for On in a Sprint Distance at a Diamond League Meet
Zurich, Switzerland, June 13, 2025 - On is thrilled to announce that college track and field sensation Isabella Whittaker (USA) is continuing her journey with the brand, officially partnering with On as she kicks off her professional career after a successful run as an NIL athlete. Making her debut as a professional On athlete at the Bislett Games in Oslo, Norway, Whittaker triumphed in her first ever Diamond League appearance, winning the 400m race in a remarkable 49.58 seconds.
Whittaker, who competed for UPenn before transferring to Arkansas, capped off her illustrious college career in spectacular fashion at the NCAA Indoor Championships in March 2025. There, she was crowned the NCAA Champion in the 400m, clocking an astonishing time of 49.24 seconds. This historic run not only secured the national title but also shattered the American indoor record, made her the second-fastest person ever in the discipline, and placed her a mere 0.07 seconds shy of the world record.
"Bella’s talent and drive are undeniable, and her recent performances have solidified her position as one of the most exciting new faces in track and field," said Kevin Quadrozzi, Athlete Manager at On. Watching her progression over the last competitions made this professional partnership a clear next step. We cannot wait to support Bella on this next step in her career.”
Speaking on this step in her career, Whittaker said: “I’m thrilled to start my professional career with On and excited to have had such a special start in Oslo! I cannot wait to continue to push boundaries, exceed expectations, and achieve big goals for myself and the brand.”
Whittaker had already showcased her elite potential while still in college. In 2024, she earned a place in the Team USA 4x400m relay pool for the Paris Olympics after a strong sixth-place finish in the 400m at the U.S. Olympic Trials and a personal best of 50.17 at the NCAA Outdoor Championships. Her collegiate career is further marked by an impressive eight Ivy League Championship titles.
Whittaker comes from a strong running lineage, with both of her parents having competed in college. Her sister, Juliette, an Olympic 800m finalist, currently runs for Stanford and is also an On NIL athlete.
About On
On was born in the Swiss Alps in 2010 with the mission to ignite the human spirit through movement – a mission that still guides the brand today. Fifteen years after market launch, On delivers industry-disrupting innovation in premium footwear, apparel and accessories for high-performance running, outdoor, training, all-day activities and tennis. On’s award-winning CloudTec® and LightSpray™ innovation, purposeful design and groundbreaking strides within the circular economy have attracted a fast-growing global fan base – inspiring humans to explore, discover and Dream On.
On is present in more than 80 countries globally and engages with a digital community on www.on.com.