UBS sharply increased its Bitcoin exposure through call options on Bitcoin ETFs, with CoinDesk reporting the bank's latest 13F disclosure showed about a 24-fold rise in that position rather than direct spot Bitcoin accumulation. The shift appeared in UBS's quarterly 13F holdings filed with U.S. regulators and available through the SEC's EDGAR system, making the filing the core record of the change rather than a public strategic announcement. Because the exposure was built through call options, UBS gained a way to express a view on upside in Bitcoin ETF prices with a smaller upfront cost and a maximum loss limited to the premium paid, instead of adding Bitcoin itself to the balance sheet. The structure can also be operationally simpler for a traditional institution than direct crypto custody. The move may point to stronger interest in upside scenarios, but it does not by itself prove an unhedged bullish stance or a broad strategic pivot into Bitcoin, since options can also be used tactically or as part of a hedge. The disclosure is likely to matter more for sentiment and ETF adoption narratives than for immediate spot price impact, and it comes as investors also watch moves by JPMorgan in BlackRock's Bitcoin ETF and Harvard's expanded Bitcoin ETF exposure.