Bears Pile Into Nuclear, Figma & Rumble

Short sellers stepped up their bets across mid-cap names this week. ORTEX data as of April 27 reveals notable moves in nuclear energy plays, design software, and alternative media — with some squeeze setups building quietly.

NuScale Power saw its SI % of FF climb to 21.8%, up from 17.2% a week ago — a 4.6 percentage point jump. Bears appear unconvinced by the small modular reactor hype, even as the stock has gained 20%+ this year. Its availability sits near 98%, so borrowing remains easy.

Figma, the design software firm that went public after its blocked Adobe deal, now carries 23.6% SI % of FF, up from 18.9%. That is a sharp build-in just seven days. Bears may be targeting its premium valuation.

Rumble holds the highest short score among names above $1B market cap at 92.8. SI stands at 26.2% of FF with a cost to borrow of 131% — shares are almost impossible to find. Availability is just 0.02%. A squeeze here could be violent.

In nuclear, Oklo also saw short interest rise 3.6pp to 21.1%, mirroring the NuScale move. Bears are broadly skeptical of next-gen nuclear.

UiPath rounds out the movers, with SI at 26.1%, up 3.6pp week-on-week.