According to Wu Blockchain:

* On August 16, there was a total net inflow of $36,015 million into Bitcoin spot ETFs.

* Grayscale ETF (GBTC) experienced an outflow of $72.9033 million.

* Fidelity ETF (FBTC) received an inflow of $61.3469 million.

* BlackRock ETF (IBIT) received an inflow of $20.3854 million.

In summary: Although there was a general inflow into Bitcoin spot ETFs on August 16, a large outflow from Grayscale ETF stands out. There were significant inflows into Fidelity and BlackRock ETFs.