# Bitcoin ETF Holdings by Issuer and Fund

> Bitcoin ETF holdings for every spot fund: BTC held, changes over 7 and 30 days, share of bitcoin supply, custodian and on-chain custody balances where public.

Markdown copy of https://voltfincrypto.com/apps/bitcoin-etf-holdings-by-issuer

**Question:** How much bitcoin does each spot Bitcoin ETF hold?

- Kind: Table in Voltfin Strata
- Topic: [Markets and trading](https://voltfincrypto.com/topics/trading)
- Chains: Bitcoin
- Status: Planned. The data is not published yet, so this page states no figure; each figure will open its receipt when it is.

Spot bitcoin ETFs hold bitcoin directly, through a custodian, for their shareholders, and each issuer publishes its fund's holdings every trading day. This table puts every fund side by side: the BTC it holds, how that has changed, the share of all bitcoin it represents and who keeps the coins.

Where an issuer has published the addresses its custodian uses, the fund's balance is also read from the Bitcoin chain at the block closest to the as-of time and shown beside the published figure. Funds without published addresses rely on the issuer's file, and the table says so. Sort by BTC held to see the largest funds, filter by issuer or custodian and open a row for its file, its addresses and the block behind its on-chain balance.

## Blueprint

One row: One row per spot bitcoin ETF, at its latest published file

- **Fund** (`fund`): The ETF's name and its ticker.
- **Issuer** (`issuer`): The asset manager that sponsors the fund.
- **Custodian** (`custodian`): The custodian named in the fund's filings.
- **BTC held** (`btc_held`, BTC): Bitcoin held at the latest as-of date, from the issuer's file.
- **Value** (`usd_value`, USD): BTC held times the oracle BTC/USD price at the block nearest the as-of time.
- **7-day change** (`change_7d`, BTC): Change in BTC held against the fund's own file 7 days earlier.
- **30-day change** (`change_30d`, BTC): Change in BTC held against the fund's own file 30 days earlier.
- **Share of supply** (`share_of_supply`): BTC held as a share of bitcoin issued through the matching block.
- **On-chain balance** (`onchain_balance`, BTC): UTXO total of published custody addresses at the matching block, where addresses are published.
- **Sponsor fee** (`sponsor_fee`): The fund's annual sponsor fee from its latest prospectus, before any waiver.
- **As of** (`as_of`): The date the fund's latest holdings refer to.
- **Source** (`source`): The issuer file and, where present, the block behind the on-chain balance.

## How it will be measured

- BTC held is each fund's holdings from the daily file its issuer publishes, recorded with the file's as-of date, its source and the time it was retrieved.
- Share of supply divides BTC held by the bitcoin issued through the block nearest the as-of time, summed from block subsidies.
- On-chain balance is the UTXO total of the custody addresses an issuer has published, read at the block nearest the as-of time; any difference from the file is shown, never hidden.
- Changes over 7 and 30 days compare each fund's holdings with its own files on those earlier dates.

## Data it needs

- `etf_holdings_daily` (to build): Holdings and daily flows of spot crypto ETFs per fund, from issuer-published holdings, matched to custody addresses where they are disclosed.
- `bitcoin_supply_daily` (to build): Bitcoin issued, supply by coin age band and by output script type (including coins whose public keys are already exposed), supply last moved long ago, and cost-basis measures.
- `address_labels` (to build): Labels for known addresses: exchanges, bridges, protocols, funds, treasuries, sanctioned addresses and known attackers.
- `native_prices_daily` (to build): Reference prices of major assets read from on-chain oracle feeds (Chainlink latestRoundData) at each day's last block, with each round's update time.
- Source: Issuer-published daily BTC holdings per fund (off-chain)
- Source: Balances of issuer-disclosed custody addresses at daily blocks
- Source: Circulating supply from gettxoutsetinfo total_amount, checked against summed block subsidies
- Source: Chainlink BTC/USD at the block nearest the as-of time, for USD value

## Questions

### How much bitcoin do ETFs hold?

The table adds up the BTC held by every spot bitcoin ETF from their latest files and shows the total as a share of bitcoin issued. Each fund's figure links to the file it came from.

### Who holds the bitcoin for spot ETFs?

Each fund names a custodian in its filings: a regulated firm that keeps the private keys, mostly in cold storage. The table lists each fund's custodian, and several funds can share one.

### Can you verify ETF bitcoin on-chain?

Only where the issuer publishes its custody addresses. For those funds, the table reads the addresses' balances from the Bitcoin chain and compares them with the file. Other funds' holdings rest on the issuer's report.

### Why does a fund's on-chain balance differ from its file?

Timing is the usual reason: the file is struck at a set time, and creations or redemptions may settle on-chain hours later. A difference can also mean the address list is incomplete, so both figures are shown.

## Glossary

- **Custodian**: The firm that holds a fund's bitcoin and its keys on the fund's behalf, usually in cold storage.
- **Cold storage**: Keeping private keys offline, away from internet-connected systems, so the coins cannot be moved without physical access.
- **As-of date**: The date and time a fund's published holdings refer to, which can differ from when the file was released.

## Related apps

- [Bitcoin ETF Flows Today: Inflows and Outflows by Fund](https://voltfincrypto.com/apps/bitcoin-etf-flows)
- [Public Companies That Own Bitcoin, Ranked by Holdings](https://voltfincrypto.com/apps/public-companies-holding-bitcoin)
- [Who Owns the Most Bitcoin: Holder League Table](https://voltfincrypto.com/apps/who-owns-the-most-bitcoin)
- [Government Bitcoin Holdings and the US Strategic Bitcoin Reserve](https://voltfincrypto.com/apps/government-bitcoin-holdings)
- [Ethereum ETF Holdings by Issuer, Fees and Staking](https://voltfincrypto.com/apps/ethereum-etf-holdings)
- [Crypto Market Cap Rankings with On-Chain Supply](https://voltfincrypto.com/apps/crypto-market-cap-rankings)

Build it in Voltfin Studio: https://app.voltfincrypto.com/signup?next=%2F