Microsoft CEO Satya Nadella is mourning the death of his son Zain Nadella.

According to Bloomberg, citing an email Satya sent to the company’s executive team, the 25-year-old, who was born with cerebral palsy, died March 1.

CelebHomes News received the following statement from Microsoft: “Very sad Satya’s son Zain Nadella is dead.” It was reported by CelebHomes News March 2nd. “The Nadellas will be grieving privately, as a whole family.

Since Satya took over the reins as CEO of the tech giant in 2014, he’s made it a priority to design products that would better serve users with disabilities, all with his son—who was legally blind and quadriplegic—in mind. Satya now is his wife. Anu and their daughters are ready to fight to help other families facing similar challenges. Seattle Children’s Hospital has received $15 million from the Nadellas. In May, the hospital also announced that it would establish the Zain-Nadella Endowed Chair for Pediatric Neurosciences in the Center for Integrative Brain Research.