UBS Bitcoin ETF calls jump 2,338% as spot holdings rise 12%

UBS Group reported IBIT call exposure equivalent to 1.95 million underlying shares on June 30, up 2,338% from March, according to a Form 13F filed with the U.S. Securities and Exchange Commission on August 13.

The filing shows Switzerland's largest bank held 407,890 shares of BlackRock's iShares Bitcoin Trust (IBIT) as of June 30, up 11.9% from 364,371 shares at the end of March. The options shift dwarfed the direct holding increase: reported IBIT calls jumped from exposure covering 80,000 underlying shares in March to 1.95 million in June, while put exposure fell to 143,300 underlying shares from 303,300, a decline of roughly 53%.

UBS's ordinary IBIT shares were valued at about $13.58 million in the June filing, with calls reported against roughly $64.92 million of underlying value and puts at $4.77 million. Combined, the three positions total about $83.26 million, though that figure mixes direct ETF ownership with options exposure and should not be read as the amount UBS paid for the contracts.

Why the 230% Headline Overstates the Move

Claims that UBS increased its spot Bitcoin ETF holdings by roughly 230% rely on combining positions the SEC filing reports separately. UBS ended June with 407,890 ordinary IBIT shares, calls covering 1.95 million underlying shares, and puts covering 143,300 underlying shares — about 2.50 million share equivalents in total. The comparable first-quarter positions totaled about 747,671, producing an increase of roughly 234.5%.

That does not mean UBS raised its direct IBIT stake by that amount. The ordinary ETF position rose only 11.9%; most of the increase came from options, which the SEC requires filers to identify separately as calls or puts. For long options, Form 13F reports positions with reference to the securities underlying the contracts, so the dollar figures reflect notional exposure rather than premium paid.

The Options Shift Is the Standout Change

The change in calls matters more than the increase in ordinary shares. UBS went from calls representing 80,000 underlying IBIT shares to 1.95 million in three months while cutting its reported put position by more than half — a different development from a simple Bitcoin ETF buying spree.

Form 13F does not reveal an institution's entire derivatives book. Written options are not reported the same way, so the disclosed calls and puts cannot be treated as UBS's complete net directional exposure. UBS Group also filed as a combination report covering multiple entities, so the positions should not be described as a single $83 million corporate Bitcoin bet by the bank itself.

The filing shows something more specific: UBS modestly increased direct IBIT holdings during the second quarter, dramatically expanded reported call exposure, and cut put exposure by roughly half. The 2,338% jump in calls, rather than a supposed 230% surge in spot ETF ownership, is the standout change — evidence that a major global bank is using regulated Bitcoin options to build more flexible exposure as U.S. spot Bitcoin ETFs deepen their role in traditional markets.

This article is for informational purposes only and does not constitute investment advice.