Good question. As a community contributor, I share this concern. The information I can provide is sourced from tonscan.org.
- TonFoundation Address (approx. $62M): https://tonscan.org/address/EQCD39VS5jcptHL8vMjEXrzGaRcCVYto7HUn4bpAOg8xqB2N
- TON DNS Address (approx. $7.6M): https://tonscan.org/address/EQC3dNlesgVD8YbAazcauIrXBPfiVhMMr5YYk2in0Mtsz0Bz
- TON Ecosystem reserve (approx. $947M): https://tonscan.org/address/EQAhE3sLxHZpsyZ_HecMuwzvXHKLjYx4kEUehhOy2JmCcHCT#transactions
I would say that the Ton Foundation manages assets worth more than 1 billion dollars.