HF Sinclair enters the week with an unusual split: the stock has rallied 26% in a month, yet short sellers just added to positions at the fastest pace of the past 30 days — a tension that makes this one of the more interesting setups in the refining space right now.
The short interest move is the week's headline data point. Short interest jumped 22% in a single session on September 10, reaching 5.5% of the free float — the highest level in the 30-day window tracked here. That jump erases a gradual drift lower that ran through most of August, when positions sat steadily around 8.3 million shares. The September 10 spike pushed that figure past 10 million. Borrow cost remains low at 0.47%, and availability is extraordinarily loose at over 5,000% — roughly 97 million shares remain available in the lending pool against current short positions. That means the fresh short interest reflects a deliberate bearish bet, not a squeeze or a technical borrowing constraint. The ORTEX short score picked up the move, jumping from 38.5 to 41.8 on September 10, though at that level it still ranks only in the 38th percentile of the broader universe — more a flicker than a fire alarm.
The Street is split in a way that helps explain the positioning. UBS raised its target to $126 on September 8, maintaining a Buy, and Goldman Sachs lifted to $109 in late July — both bullish voices now sitting above the current price of $107.84. But most of the recent target raises still land well below where the stock is trading: Wells Fargo moved to $93, Barclays to $86, Mizuho to $85, and Evercore initiated at $85. The consensus mean target of $95.60 implies downside from here, even after the wave of upgrades. Raymond James carries the most constructive view with a Strong Buy and a $95 target — itself below spot. The bull case centres on a 2026 free cash flow recovery, advantageous heavy-differential exposure, and what bulls see as an attractive valuation at roughly 9x trailing earnings and under 6x EV/EBITDA. Bears point to a CEO who went on voluntary leave — a lingering governance overhang — persistent refinery maintenance drag, and a lubricants segment that has underperformed. The 90-day EPS momentum factor ranking of 87 suggests estimate revisions have been moving in the right direction, but the forward earnings growth score sits at just 23rd percentile, which tells a less exciting story about what comes next.
The CEO story is worth dwelling on. Franklin Myers made an open-market purchase of 15,000 shares at $85.30 on August 11 — a $1.28 million discretionary buy with no 10b5-1 plan attached. That purchase came at a price roughly 26% below where the stock trades today, so it has proven well-timed. The net insider position over the past 90 days is modestly positive at about 3,800 shares, though the aggregate net value figure is skewed by a large Director-level distribution from REH Advisors in early August. That brings the activist register into the picture: REH Advisors, which filed a Schedule 13D in September 2025, trimmed its stake from 6.3% to 5.1% according to an August 4 amendment — selling 2.375 million shares at $89.41 for roughly $212 million in proceeds. REH remains an active 13D filer, meaning its intentions are declared as more than passive. Positions are as-last-disclosed around the 5% threshold, and a holder that drops below 5% may not file again. The direction of travel — a large, staged reduction — adds a layer of complexity to the ownership story that the Myers purchase alone does not resolve.
Peers also rallied this week, which provides some context for DINO's 2.3% gain. VLO rose 5.3%, DK added 5.1%, and CVI surged nearly 14% — DINO's week looks modest against that backdrop. MPC gained 2.1%, roughly in line. The options market is not particularly alarmed: the put/call ratio of 0.51 is modestly above its 20-day average of 0.42, a z-score of just over 1.1, and far from the 52-week high of 1.40. Investors are adding a touch more downside protection than usual, but the options market is not flashing the kind of defensive posture that would suggest the recent rally has seriously wrong-footed the buy side.
The next earnings date is November 5. With the stock now trading above most analyst targets and short sellers rebuilding positions at pace, what to watch is whether the September short interest build continues into next week — and whether REH Advisors crosses below the 5% threshold that would remove any filing obligation, leaving the market without a clear read on one of the register's most active participants.
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