Mirion Technologies heads into its Q1 2026 earnings print with short sellers pulling back and options traders adopting their most bullish posture in months.
The options market is the most striking signal. The put/call ratio has collapsed to 0.06, nearly three standard deviations below its 20-day average of 0.11. That is the most call-skewed reading of the year and close to the 52-week low of 0.04. Options traders are not hedging into this print — they are positioned for upside.
Short interest reinforces that picture, though from a different angle. Bears have been reducing exposure steadily. SI as a percentage of the free float has fallen from a recent peak near 10.5% in early April to roughly 9.6% now, a decline of around 5% on the week. A month ago the short base was building; it has since reversed. Borrowing costs are negligible at 0.54%, and availability in the lending market remains comfortable — both conditions telling the same story: short sellers are not pressing their bets into the release.
The analyst community has spent the past three months trimming targets while holding constructive ratings. JPMorgan, Goldman Sachs, Citi, Baird, and Morgan Stanley all cut their price objectives — in most cases by $2–$4 — following the February earnings miss that sent the stock down roughly 8% in a single session. Yet every firm maintained a positive or neutral rating. The mean target of $28.10 implies more than 50% upside to the current price of $18.68, a gap that reflects the Street's conviction that the selldown has been overdone. The bull case rests on nuclear power demand: the segment grew nearly 18% year-over-year in the most recent quarter, and adjusted EBITDA margins expanded by 310 basis points. The bear case centres on the backlog — which fell 3.4% year-over-year in Q1 2025 and has shown only minimal sequential recovery since — raising questions about whether the revenue pipeline can sustain that margin momentum.
On the ownership side, BlackRock and Vanguard both added shares in Q1 2026, reinforcing the institutional floor. Insider activity is less encouraging: the CEO, CFO, and three other senior officers each sold shares on April 1, following larger CEO and CFO sales in early March. The net 90-day insider position is technically positive due to share awards, but the cash transactions have been one-directional.
The print will test whether the nuclear power backlog is recovering enough to restore confidence in the forward revenue trajectory — and whether the company can show that the February miss was a timing issue rather than a structural one.
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