Perma-Fix Environmental Services walked into its Q1 2026 earnings day carrying a short book at 7.4% of the free float. That's a meaningful position for a micro-cap nuclear waste cleanup firm. The print itself was ugly: EPS came in at -$0.40, nearly double the -$0.24 estimate, and revenue of $11.1M missed the $13M target by a wide margin.
The lending market had already flagged the tension. Short interest held broadly flat on the week — down just 0.2% — after dropping sharply from a late-April peak near 1.50M shares to around 1.36M. That mid-April spike and subsequent pullback is the defining move in the short book over the past six weeks. Bears built into the print, then trimmed as the stock recovered through late April and early May. Despite the trim, 7.4% of float remains on the short side — well above what you'd call a casual position in a stock this small. The ORTEX short score is running at 71.2, near the top of its recent 10-day range, ranking in just the 4th percentile of the universe on the short-score axis — meaning a very large proportion of stocks score lower on short-scoring metrics.
Availability in the lending market is moderate — not distressed, but not loose. Borrowing costs have drifted down about 7% on the week to 0.83% annualised, the lowest level since late March. That suggests the supply of available borrow is holding up, and there is no acute squeeze dynamic in the plumbing right now. With days-to-cover at 21.5 — a remarkably long runway — any accelerated short covering would take time to work through, and the ORTEX DTC rank places PESI in just the 2nd percentile of the broader universe.
Options tell the most constructive story in the mix. The put/call ratio has dropped to 0.41, roughly 1.7 standard deviations below its 20-day mean of 0.45. That's a call-heavy skew — options activity has shifted toward the upside relative to where it's been. The 52-week range on the PCR runs from 0.06 to 1.33, so the current reading is closer to the bullish end of the spectrum. Whether this reflects genuine conviction or simply a lack of put demand before a print that turned out worse than expected is the question the coming sessions will answer.
The earnings record adds context. The last time PESI reported, in late March, the stock fell 7.8% on the day and 11.3% over the following five days. Today's miss was arguably larger relative to expectations, yet the stock had already absorbed a 1.9% gain heading into the session and was flagged in pre-market as one of the industrials names seeing unusual early activity. The company's EPS surprise factor score ranks in the 94th percentile historically — which underscores how anomalous this miss is. PESI has consistently beaten estimates; a double-miss of this magnitude is not in character.
On the ownership side, institutional holders are broadly stable. BlackRock and Vanguard both added modestly as of their March filings, taking their combined stake to around 11.7%. A new entrant, Hold Alapkezelo Zrt, appeared with a 5.1% position as of late March. Schelhammer Capital Bank trimmed by roughly 130,000 shares. Analyst coverage remains thin — Craig-Hallum's Buy initiated in mid-2024 at an $18 target is the most recent substantive action on record; given today's miss, that target will attract scrutiny if the firm updates its view. The analyst data is stale and should be treated with caution until any post-earnings revision is published.
What to watch next: whether the short book rebuilds from its trimmed base in the wake of today's double-miss, and whether any analyst who covers the name moves to update guidance — that combination will determine whether the 7.4% short float becomes the floor or the starting point.
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