The 2 Public Companies With the Biggest Bitcoin Portfolios

For many years, the idea that publicly traded corporations might buy Bitcoin for their reserves was considered laughable. The top cryptocurrency was considered too volatile, too fringe to be embraced by any serious business.

That taboo has been well and truly broken, with a number of major institutional investors buying up Bitcoin in recent years.

The floodgates first opened when cloud software company Strategy (formerly MicroStrategy) bought $425 million worth of Bitcoin in August and September 2020. Others followed suit, including payments processor Block and electric car manufacturer Tesla.

Per BitcoinTreasuries, public companies holding Bitcoin now account for 2.8% of the total supply of 21 million BTC. These are the biggest holders as of this writing.

1. Strategy

Strategy, a prominent business analytics platform turned Bitcoin treasury company, has adopted BTC as its primary reserve asset. The company is perhaps better known as MicroStrategy, but changed its name in February 2025 with co-founder Michael Saylor citing the “power and positivity” of “strategy.”

The firm, which produces mobile software and provides cloud-based services, has aggressively pursued a Bitcoin buying spree, scooping up millions of dollars worth of the cryptocurrency. As of this writing in February 2025, it holds 478,740 BTC in reserve, equivalent to more than $46 billion and more than 2% of the total number of Bitcoin that will ever be issued.

At one point, Strategy Executive Chairman Michael Saylor said, he was buying $1,000 in Bitcoin every second. In the company’s Q1 2024 earnings call, Saylor claimed that the company’s adoption of a “Bitcoin strategy” had enabled it to deliver 10x to 30x the performance of rival enterprise software companies in the business intelligence sector.

Unlike other executives who typically shy away from discussing their personal investments, Saylor has made it public that he personally purchased 17,732 BTC—currently worth over $1.6 billion and still holds them as of September 2024. It’s something of an about-face for the Strategy co-founder, who in 2013 claimed that Bitcoin’s days were numbered.

“We're at the beginning of the stage of rapid institutional adoption of digital property in the form of Bitcoin,” Saylor said during the company’s Q1 2024 earnings call. He added that in the future, Bitcoin won’t compete against other crypto assets, but against, “gold, art, equities, real estate, bonds, and other types of store-of-value money in wealth creation, wealth preservation, and the capital markets.”

Strategy plans to buy even more Bitcoin in the near future, as it’s in the midst of raising a planned $42 billion to do just that, and Saylor is making the pitch to other public companies as well—like Microsoft, though shareholders ultimately voted against the proposal.

2. Marathon Digital Holdings Inc.

Bitcoin mining company Marathon Digital, unsurprisingly, is also a large holder of Bitcoin, with 45,659 BTC in its corporate treasury according to its most recent update in January 2025. That’s worth more than $4.4 billion at today’s prices.

The company, which aims to build "the largest Bitcoin mining operation in North America at one of the lowest energy costs," originated as a patent holding firm (and was often referred to as a patent troll) before its pivot into crypto mining.

As of July 2024, Marathon Digital runs more than 250,000 Bitcoin miners capable of producing 31.5 EH/s, with an average operational hash rate of 26.3 EH/s.

The firm noted that it is accelerating its growth plans following the 2024 Bitcoin halving, in a bid to “mitigate the impact” of receiving half the BTC rewards per each successfully mined block.  The firm had said that it aimed to double the scale of its mining operations in 2024.

The company increased its revenue by 35% to $132 million in Q3 2024, up from $98 million in Q2. It recently raised nearly $2 billion via convertible notes, most of which has been used to buy Bitcoin.