George Soros’ Open Society Foundations will lay off at least 40% of its staff one month after the 92-year-old announced he handed the reins of the multi-billion-dollar foundation to his son, Alexander Soros.

The job cuts were announced in a statement signed by Alexander Soros and the foundation’s president, Mark Malloch-Brown. It said the foundation would undergo “significant changes” to its operating model.

“Through this new model, the Board aims to transform operations across the global network, with the goal of generating a nimbler organization better able to build on past achievements and confront urgent and emerging challenges,” the statement said.