Stefanie Rock, a 29-year-old associate broker at Jones Lang LaSalle specializing in commercial office leasing in New York City, died Friday morning after being struck by a vehicle while jogging in Water Mill, authorities said.
Southampton Police reported that Rock was hit by a Toyota just after 9 a.m. She was pronounced dead at the scene. The unidentified driver, who has cooperated with investigators, was taken to Southampton Hospital for evaluation and subsequently released.
An investigation into the incident is ongoing. Police stated the driver was cooperative with law enforcement.
Rock joined JLL's New York City office in April 2024. Prior to that, she had worked as a marketing intern for Brookfield Property Partners after graduating from Vanderbilt University in 2019 with a Bachelor of Science in Human and Organizational Development. Her real estate career focused on commercial office space leasing and tenant representation. She was involved in brokering several notable Manhattan deals, including representing the beauty-tech startup GlossGenius in securing a full-floor lease at 838 Broadway in 2024.