Nebius Group walked into the May 13 earnings call week having already detonated its biggest catalyst of the year — a $643 million acquisition of Eigen AI and a confirmed expansion of its Meta partnership — sending the stock up 30% on the week to close at $175.92, a record high. With shorts sitting on nearly 20% of the float, the setup looks like a classic squeeze in slow motion.
The positioning story is the most compelling angle here. Short interest has edged lower — down roughly 1.4% on the week and about 6% over the past month — but at 19.5% of the float it remains substantial. The borrow market reflects a genuine battle. Availability tightened sharply in the middle of last week, with the lending pool fully exhausted on May 1 and May 4 (availability at its tightest since the 52-week max stress period). By May 5 the picture had eased marginally, but availability remains tight by any standard. Cost to borrow has drifted lower — now at 0.84%, down about 15% on the week — which is notably cheap relative to a float this short. That combination of a high short position and low borrow cost creates an asymmetric dynamic: shorts are not being punished to carry the position, but the risk of a forced cover spike grows the more the stock rallies. The put/call ratio at 0.86 barely moves the needle — it's right at its 20-day average and barely half a standard deviation above it, near the 52-week high of 0.90. Options traders are not making a strong directional call, despite the extraordinary price action.
The Street's positioning has a split personality. Analyst consensus officially reads "Sell" — but that reflects only one sell-side rating against a flood of recent initiations, almost all bullish. Since March, Citigroup, B of A Securities, Cantor Fitzgerald, and Wolfe Research have all set up coverage. B of A came in at a $150 target with a Buy. Cantor initiated at Overweight with a $129 target. Both are now well below the current $175.92 close. DA Davidson raised its target to $200 in mid-March, one of the few targets that still sits above the current price. The bull case centres on Nebius's vertically integrated AI cloud model, the Eigen AI deal reshaping its compute stack, and the Meta and Microsoft contracts giving revenue visibility. The bear case is less about the model and more about execution: the company already missed its 2025 ARR target, lowered full-year guidance due to supply constraints, and faces a demanding $7–9 billion ARR goal for 2026 year-end. At an EV/EBITDA of 16.6x — compressed by about 2.3 turns over the past month as the stock has run — the market is not cheap, but multiples are moving in the right direction for bulls.
Insider selling has been persistent and patterned. Director Elena Bunina sold shares four separate times between April 10 and May 4, in tranches that consistently cleared around $1 million per transaction — a cadence that reads as programmatic rather than opportunistic. Chief Level Officers also sold in March and April. Across the 90-day window, net insider activity across all recorded trades skews negative. That said, the institutional register tells a very different story: BlackRock added over 9.4 million shares as of April 30, arriving as a fresh major holder. State Street and Capital Research both built new positions through Q1. The institutional buying wave is large enough to absorb the insider selling multiple times over — and it points to a cohort of managers who are anchoring to the Eigen deal and the AI infrastructure thesis rather than trading around insiders.
Earnings history adds context. The most recent print, on April 24, produced a 7.7% single-day drop and a modest 1.6% loss over the following five days. The February print was the opposite — a near 10% gain on day one, extending to 9% over the week. The next earnings call is confirmed for May 13. With the stock now 30% higher than where it was when the April earnings hit, and analysts who initiated at $129–$169 already sitting below the price, the print on May 13 carries more weight than usual: the question is no longer whether the AI infrastructure story is credible, but whether the execution numbers — particularly progress toward the 2026 ARR target — match the altitude the stock has already claimed.
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