Wallets holding 100 to 1,000 BTC have added 113,950 BTC since July 15, according to Santiment. About 18,205 of those wallets now hold 5,243,253 BTC, roughly 26.1% of circulating supply. The same cohort added 222,756 BTC over the past year. They distributed about 77,800 BTC around July 19, then came back after the late-July Coldcard shock. That band is mid-tier size, not proof the coins sit with institutions, but it is a thick transfer into a supply cluster that already holds more than a quarter of bitcoin.