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Grayscale Bitcoin Trust holds Bitcoin on behalf of institutional investors via the GBTC product. One of the largest custodied Bitcoin positions in the world.

One of the primary cold storage addresses associated with MicroStrategy's Bitcoin treasury. The company holds over 550,000 BTC as of 2025, making it the world's largest corporate Bitcoin holder.

In February 2022, the DOJ seized approximately 94,636 BTC linked to the 2016 Bitfinex hack. This was the largest financial seizure in DOJ history at the time.

The United States government holds approximately 200,000+ BTC seized from various criminal cases, including Silk Road, Bitfinex hack proceeds, and others. Executive Order 14233 established the Strategic Bitcoin Reserve in 2025.

The very first Bitcoin address, created in the genesis block on January 3, 2009. Coins here are unspendable by protocol design.

Hal Finney received the first ever Bitcoin transaction of 10 BTC from Satoshi Nakamoto on January 12, 2009. A legendary cryptographer and cypherpunk.

One of the most infamous Bitcoin addresses in history. Mt. Gox was the dominant exchange from 2011 to 2014 before its catastrophic collapse, losing ~850,000 BTC.

Laszlo Hanyecz paid 10,000 BTC for two Papa John's pizzas on May 22, 2010 — the first commercial Bitcoin transaction in history. Now celebrated as Bitcoin Pizza Day.

One of the earliest known Bitcoin addresses linked to Satoshi Nakamoto through blockchain analysis. Part of the "Patoshi pattern" identified by researchers.

The US government seized approximately 144,000 BTC from Silk Road following the arrest of Ross Ulbricht in 2013. Later auctioned off by the US Marshals Service.

Foundry USA is currently the largest Bitcoin mining pool by hashrate, consistently mining 25-30% of all blocks. Operated by Foundry Digital, a subsidiary of Digital Currency Group.

The Bitcoin Foundation was one of the earliest organisations established to promote Bitcoin adoption and fund core development. Now largely inactive but historically significant.

Brink is a nonprofit that funds and mentors open-source Bitcoin protocol developers. Recipients include contributors to Bitcoin Core, Lightning, and related infrastructure.

The Human Rights Foundation's Bitcoin Development Fund supports open-source developers working to make Bitcoin more private, decentralised, and censorship-resistant.

OpenSats is a public charity supporting free and open-source contributors working on Bitcoin and related technologies. Distributes grants to Bitcoin Core developers and lightning network engineers.