BIXI — Bitcoin Infrastructure Acquisition Corp Ltd. — is a small Nasdaq-listed SPAC priced near its trust value. This week's story is less about short positioning and more about who has been quietly building stakes.
The institutional register tells the most interesting story. Starboard Value disclosed an increase to 449,999 shares on May 15. That headline appeared alongside fresh filings showing Riot Platforms raising its stake in the same news cycle. For a sub-$250m SPAC, this cluster of names is notable. Aristeia Capital, Linden Advisors, Verition Fund Management, Magnetar Capital, and Parallax Volatility Advisers all initiated or added positions as recently as Q4 2025 or Q1 2026. The sponsor, Samara Acquisition Sponsor V Ltd., retains 21.7% of shares outstanding. Combined, the top 15 holders account for a meaningful share of the float — and the roster reads like a classic SPAC arbitrage trade: multi-strategy and event-driven funds parking capital near $10 NAV.
The borrow market is essentially a non-story. Short interest sits at a negligible 0.05% of the free float — roughly 10,000 shares in total — with borrow availability at 9,999% of short interest, meaning there is virtually unlimited stock to borrow relative to current shorts. Cost to borrow was 7.6% as of May 13, down around 22% on the week but still nearly three times its level from late January, when it was running at 2.2–3.1%. The month-over-month rise of 178% in borrow cost reflects episodic demand spikes rather than any structural short thesis. The ORTEX short score of 28, near the lower end of its recent range, underlines how little conviction there is on the short side.
Price action is equally quiet. BIXI has traded flat to marginally higher, closing at $9.97 on May 15 — up just 0.1% on the week and 0.6% over the past month. For a SPAC at this stage, staying close to trust value is the expected default, and the stock is doing exactly that.
The next earnings event is flagged for June 29. Previous announcements produced no material price movement, consistent with a structure where trust value anchors the share price ahead of any deal announcement. What to watch is whether Starboard's stake increase, combined with Riot Platforms' disclosed position, signals early signs of a SPAC deal in the Bitcoin infrastructure space — any target or merger announcement would change the calculus entirely.
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