Jane Street, Mubadala Boost Stakes in BlackRock Bitcoin ETF
Jane Street and Mubadala Investment Company increased their exposure to BlackRock’s iShares Bitcoin Trust (IBIT) in Q4 2025 filings, the disclosures show. Jane Street — a major market maker — and Mubadala — a sovereign-linked investor — both added to positions in the ETF vehicle, signaling that sophisticated institutional participants are still allocating to regulated bitcoin products even as BTC (ticker: BTC) remains volatile. These adjustments matter for market structure and confidence. Larger, steady institutional stakes can deepen liquidity around IBIT, reduce friction in creation and redemption processes, and reinforce demand for on‑exchange, custody-backed bitcoin access. While not an immediate price driver, continued institutional participation is a positive signal for long-term ETF adoption and the broader institutionalization of crypto exposure.