Tether, the issuer of the USDT stablecoin, has significantly increased its Bitcoin reserves over the past 12 months, becoming one of the leaders among corporate buyers of the digital asset. The company has added 27,700 BTC to its holdings, surpassing most spot exchange-traded funds (ETFs) in terms of annual purchases.
This is reported by Finway
Tether’s Bitcoin Reserves and Key Investments
As of September 2025, Tether holds 100,521 BTC on its balance sheet, which is approximately $11.32 billion. In this regard, the company ranks third among corporate Bitcoin owners globally, trailing only Strategy and Block.one.
According to official information, about 7,900 BTC is held directly in reserves to back USDT, while another 19,800 BTC has been allocated to the digital asset fund Twenty One Capital (XXI), in which Tether has participated as a co-investor.
“We combine the reserve backing of the stablecoin with an investment approach that includes Bitcoin, gold, and real estate. This allows Tether to remain resilient even in a volatile market.”
Comparison with Leading ETFs and Future Plans
According to the company, Tether has outpaced well-known ETFs such as VanEck HODL, Bitwise BITB, Ark 21Shares ARKB, and WisdomTree BTCW in terms of Bitcoin purchase volumes. Meanwhile, the largest market players remain ahead: BlackRock IBIT has increased its reserves by 394,600 BTC, Grayscale mini Bitcoin Trust by 44,200 BTC, and Fidelity FBTC by 27,900 BTC.
Tether has been systematically purchasing Bitcoin since May 2023, investing up to 15% of its quarterly profits into this asset. This strategy has allowed the company to become one of the few large corporate investors officially recording a portion of its profits in cryptocurrency.
In June, the company’s CEO Paolo Ardoino announced plans to make Tether the largest Bitcoin miner by the end of 2025.