Tether International took full control of the Bitcoin treasury company XXI after acquiring SoftBank's entire position, valued at roughly $679 million. SoftBank's directors stepped down at closing, leaving Tether and Cantor Fitzgerald as the principal backers of the 43,514-BTC vehicle.
Tether International acquired SoftBank's entire stake in NYSE-listed Twenty One Capital on May 20, the stablecoin issuer confirmed in a statement on Wednesday. SoftBank held roughly 26 per cent of XXI's publicly traded shares, worth approximately $679 million by Bloomberg's calculation. Financial terms were not disclosed. SoftBank's representatives on the XXI board stepped down at closing in accordance with the company's shareholder agreement, leaving Tether and Cantor Fitzgerald as the dominant ownership voices on the board.
The price moved on the news. XXI shares rose about 5 per cent in the session following the announcement, with bid-side interest concentrated in the pre-market window before US trading opened. The bitcoin treasury vehicle's market capitalisation now sits a fraction above where it traded on its NYSE debut following the December 2025 SPAC merger with Cantor Equity Partners.
What Tether actually bought is concentration. Twenty One Capital holds 43,514 BTC — approximately $3.3 billion at current prices — and its strategy is explicit about maximising the ratio of bitcoin per share rather than chasing earnings. With SoftBank gone, the board no longer has to balance the bitcoin-maximalist instincts of Tether and Cantor against a Japanese conglomerate that originally underwrote the SPAC for diversification reasons. CEO Jack Mallers, the Strike founder who has been pushing for vertical integration between XXI's treasury and a payments stack, now has a board that will not push back on that thesis.
SoftBank's exit is the more interesting half of the trade. Masayoshi Son has spent the past two years repositioning the Vision Fund away from late-stage venture and back toward AI compute, where the firm has committed material capital to the OpenAI build-out and to Arm's hyperscaler roadmap. A 26 per cent stake in a single-asset bitcoin treasury was always an awkward fit for that mandate. The May sale takes a roughly $679 million crypto position off the balance sheet and recycles it into a sector SoftBank has been more publicly bullish on.
Tether's expansion into public equity ownership marks a change in posture for the stablecoin issuer, which historically deployed its reserves into US Treasuries and short-dated paper rather than concentrated equity stakes. The XXI position is the largest publicly disclosed equity holding the company has taken, and Tether is now indirectly long roughly 43,514 BTC through a vehicle it can dominate at the board level. That is structurally different from buying bitcoin directly — it allows Tether to influence corporate strategy without consolidating the underlying asset onto its own balance sheet.
The transaction also realigns XXI's competitive set. With Strategy holding 762,000 BTC and dominating corporate treasury buying through the first quarter of 2026, Twenty One Capital has been positioned in the market as the smaller, more product-focused alternative — a treasury vehicle that wants to integrate with a payments rail rather than simply accumulate. Mallers has been explicit on that point in earnings calls. Removing SoftBank simplifies the path toward the planned mergers with Strike and Elektron Energy that he flagged at the company's first investor day.
Cantor Fitzgerald's continued role anchors the institutional half of the structure. The firm's relationship with bitcoin goes back to its first abortive futures programme in 2017, and Howard Lutnick's departure for the Commerce Department earlier in the Trump administration has not loosened the firm's grip on the XXI cap table. Cantor sponsored the SPAC, custodies a meaningful portion of XXI's bitcoin, and retains board representation.
Regulatory exposure is the largest unresolved question. Tether's record $6.2 billion in profit in 2024 was built on the spread between its dollar reserves and zero-yielding stablecoin liabilities, and the company has spent the past year managing increasingly direct engagement with US regulators following the GENIUS Act compromises. Taking a controlling-influence position in a US-listed company introduces a new surface of disclosure obligations and potential conflict-of-interest review. Tether has not addressed that publicly.
There is also a corporate-governance question that the press release skipped. With SoftBank's directors gone, the board's only meaningful external check on Tether-Cantor decision making is the public float — and the public float of a single-asset bitcoin treasury vehicle is not a particularly loud governance voice. Activists do not run campaigns against companies whose stated purpose is to hold bitcoin. That leaves Mallers, Tether and Cantor in functional control of a $3.3 billion balance sheet without much friction.
Twenty One Capital's bitcoin holdings have not changed. Its boardroom has.
