In late 2020, Jennifer Mnookin had a big decision to make: Her 78-year-old father had end-stage kidney disease, and she was the only one of her siblings with a perfect match.

Jennifer Mnookin, Columbia’s 21st president, officially assumed her role Wednesday.

Gary Bobr, a Barnard access attendant, has died after a medical emergency on campus, Kelli Murray, executive vice president for strategy and chief administrative officer, wrote in a Tuesday email to the Barnard community.

Former interim University President Katrina Armstrong will transition out of her current role leading Columbia University Irving Medical Center to launch the Vagelos Institute for Basic Biomedical Research, acting University President Claire Shipman, CC ’86, SIPA ’94, announced in a Monday email to the University community.

Graduating students booed acting University President Claire Shipman, CC ’86, SIPA ’94, for the second year in a row as she delivered her address at Columbia’s undergraduate Commencement ceremony Wednesday afternoon.

The Columbia College community celebrated the class of 2026 at its annual undergraduate Class Day ceremony Tuesday on Columbia’s Morningside Heights campus. Acting University President Claire Shipman, CC ’86, SIPA ’94, did not appear at the ceremony, deviating from the previous year.

Rekik Tibebu Demeke, a former student in the School of Engineering and Applied Science, has died, SEAS dean Shih-Fu Chang wrote in a Saturday email to the community.

Joshua Garay, a graduating senior in Columbia College, has died, Columbia College Dean Josef Sorett wrote in a Monday email to the community.