MRZ: A 10% Shareholder Buys Every Dip Into a 34% Slide

Mirasol Resources Ltd. enters the final trading day of April with its largest shareholder buying aggressively into a sharp multi-week decline — a signal worth watching against a backdrop where the stock has fallen 34% in a single week.

The most striking feature of this week's data is the conviction buying from Glenn Pountney. The 10% shareholder has executed ten separate buy transactions since late March, accumulating roughly 853,500 shares net over the past 90 days at an estimated cost of around CAD $274,000. The pace picked up sharply during the slide — he bought on April 21, 22, 23, and 24 as the stock dropped from C$0.47 toward C$0.33. Pountney now holds 15.4 million shares, representing 17.4% of the company, and his most recent filing is dated April 24. With the stock closing Wednesday at C$0.33 — down 23% on the month — that buying cluster is sitting underwater in the near term.

The borrow market tells a more nuanced story, though at these share volumes the numbers should be taken in context. Short interest is tiny in absolute terms — roughly 22,600 shares, or less than 0.03% of the float — so the directional significance of any short positioning is limited. What is notable is the pace of change: short interest has risen more than 3,000% over the past month, driven by near-zero starting levels in late March when fewer than 750 shares were reported short. The current reading reflects a sprint from essentially nothing. Cost to borrow has climbed to 5.5%, up nearly 38% over the past 30 days, suggesting the lending market is tightening as some investors seek to establish short positions. Availability has eased somewhat — utilization came down from 87.8% on April 24 to 28.2% by April 29 — indicating the pool has loosened after a brief squeeze in the lending market mid-week.

The ORTEX short score has drifted higher through the month, moving from 28.4 in mid-April to 41.3 by April 28. That's not an extreme reading — it ranks in roughly the 22nd percentile among peers — but the trajectory matters. The score is climbing as the stock falls, which means short-side interest is growing into weakness rather than being driven by prior momentum. The factor profile is thin given the company's junior mining status: the sector score is neutral at the 50th percentile, while the utilization rank (19th percentile) and short score rank (22nd percentile) both reflect the low-base nature of current short positioning. No analyst coverage or valuation multiples are available for a company of this size and stage.

Institutional concentration is high and worth flagging. John Tognetti holds 26% of shares, Pountney holds 17.4%, and Jupiter Fund Management holds just over 9%. Together, three holders account for more than half the company. That concentration cuts both ways — it limits the free float available for short sellers to borrow against, but it also means any shift from a major holder has an outsized effect on price. Tognetti's last reported change added 3.2 million shares as of December 2025; his position has not been updated since. Earnings are next scheduled for May 28.

The next few weeks reduce to a simple question: whether Pountney's sustained buying around the C$0.33–0.47 range acts as a floor, or whether the short score's upward drift reflects a broader reassessment of the story into the late-May results.