Go through the prospectus from Fidelity.
You will never find out how many Satoshis a single share of FBTC holds.
Is this true for all the ETF’s?
Discussion
No, and I don’t think that’s right for fidelity either. However it’s much more complicated than just sats/share since shares can trade freely at their own price.
There’s a correlation. GBTC shows sats per share. So even if they don’t, it does whittle away and get compared to other ETFs that do show it.
Accountability, and Fidelity does support Bitcoin the most, albeit no Bitcoin withdrawals yet, but they will capitulate.