NPK International heads into September with a striking split: short sellers have been quietly adding positions for weeks, yet options traders are about as bullish as they have been all year.
The short interest story is the clearest development this week. Bears have rebuilt positions sharply — SI climbed 20% over the past week to 3.8% of the free float, and is up 28% over the past month. The move started around August 24, when short shares jumped from roughly 2.6 million to above 3.0 million in a single session and have held elevated since. That said, the absolute level is still modest, and the lending market is not under any pressure. Availability is exceptionally loose at nearly 3,000% — meaning shares available to borrow dwarf those already borrowed by a factor of roughly 30 to one. Borrowing costs confirm the same picture: cost to borrow ticked up to 0.51% this week but remains firmly in the low range, well off the nearly 1.9% spike seen in early August.
Options tell the opposite story. The put/call ratio has collapsed to just 0.05, roughly 1.4 standard deviations below its 20-day average of 0.36. That is near the low end of the past year's range. The shift is stark: through most of August, the PCR ran between 0.47 and 0.58 — solidly protective — before falling off a cliff around August 24, the same day short interest started climbing. Call volume has swamped put demand, suggesting options traders see more upside from here even as shorts add.
The Street is broadly constructive, though analyst data has grown stale. The most recent coverage changes are from late 2025, with HC Wainwright raising its target to $18 and Roth Capital and B. Riley also lifting targets — all three keeping Buy ratings. The consensus mean target of around $20 implies meaningful upside from the current $13.24 price. On valuation, the stock trades at a P/E near 22.6x and EV/EBITDA of around 11.2x, with both multiples drifting higher over the past month. The bull case rests on upward revenue guidance revision, record rental revenues up 34% year-on-year, and expanding specialty rental margins. Bears point to gross margin compression — falling to roughly 32% from 37% the prior quarter — and the risk that customers reduce services under penalty-free contract structures.
Institutional ownership adds a degree of complexity. BlackRock recently filed a fresh 13G disclosing an 8.4% stake, while Vanguard Capital Management initiated a new 5% position — both filed in late July. Ameriprise, however, trimmed its stake from 7.7% to 6.2% in a November 2025 filing, and Dimensional Fund Advisors edged down from 5.7% to 4.7% in April. No 13D activist is on the register, so no activist angle. The insider register is quiet: the sole recent open-market transaction was a small planned sale of 10,000 shares by Director Rose Robeson on August 27 under a 10b5-1 plan — a scheduled disposal, not a conviction signal.
The next earnings print is scheduled for October 29. The most recent result, reported at the end of July, produced a 3.7% one-day gain and a 12.4% five-day move — a notably strong post-earnings follow-through. With short sellers rebuilding into a stock that just put in a strong earnings reaction, and options traders leaning aggressively into calls, the October print is the next focal point worth watching.
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