See who holds it, what changed and what could matter next.

The accounts holding the most of a coin, read from its blockchain. Boostio lists the 250 largest coins by market cap and, for each coin with a usable source, shows how concentrated it is, who the 20 largest accounts are (with the labels the source attaches to known accounts, such as exchange cold wallets, staking contracts and project treasuries) and what changed since the day before.

Boostio builds it every day from public sources. The coins are CoinGecko's 250 largest by market cap, largest first; nobody picks or removes coins by hand. Holder data comes from the coin's own chain where an open source allows showing it (Ethereum, Ethereum Classic, Hedera, Stellar, Internet Computer and Kaspa today) and from CoinGecko's onchain data for coins that live as a token contract. Only the latest list is kept, with the changes since the one before.

Every large coin is listed, but a holder list needs a source that publishes the largest accounts and allows showing them. For XRP, the free XRP Ledger rich-list API is licensed for non-commercial use only; for Bitcoin, Litecoin and Dogecoin, the ranked-address APIs need a paid key. Each coin's brief says what is missing and what would add it. Boostio shows nothing rather than an estimate, and for Bitcoin and Ether it shows what public companies disclose holding.

Often not. An exchange account holds coins for many customers, a staking or bridge contract holds coins many users deposited, and a project treasury may be locked. An unlabelled account can be anyone. That is why Boostio sorts the largest accounts into classes and shows how much of their balance carries a label at all.

Not necessarily. Between two daily lists an account's balance can change because coins moved to another address of the same owner, to or from an exchange, or into a contract. Boostio reports balance changes and never calls them buys or sells.

Company directors, officers and 10% owners report their trades on SEC Form 4 within two business days. Open-market purchases with their own money are rarer than sales; sales are common for tax, diversification or pre-arranged 10b5-1 plans. Neither predicts the price. Grants, option exercises and tax withholding are pay, not trades, and are counted apart.

A trading plan an insider sets up in advance, which then sells or buys on a schedule. Form 4 has a box for trades made under one, and Boostio counts those sales apart.

A 13F shows a fund's positions on the last day of a quarter and is filed up to 45 days later, so it describes the past. The fund may have traded every day since. Boostio shows the dates beside every 13F figure.

Nasdaq's data vendor estimates some dates from a company's past report dates until the company announces the real one. Those are marked Estimated and can move. A date Nasdaq lists with its report timing and does not mark as an estimate is shown as Expected.

From the official schedules: the Federal Reserve's FOMC calendar and the Bureau of Labor Statistics release schedule for the Consumer Price Index. They are marked Official.

Yes, with a free account: My calendar shows the same market-wide dates beside the earnings, unlocks and milestones of your saved ideas, and downloads as a file for Google, Apple or Outlook calendars.