Top Stock Movers Sept 24, 2026: APUS, SRZN, GLND

APUS — Apimeds Pharmaceuticals US, Inc. (+122.3%)

Apimeds Pharmaceuticals (APUS) closed at $5.09, more than doubling on volume of 40.98 million shares — roughly 18.6× its 20-day average of 2.2 million. That kind of volume explosion in a stock with a market cap of just $7.7 million is a classic hallmark of a retail-driven momentum surge.

Why it moved: Multiple outlets covering today's session — including Benzinga, TipRanks, and Timothy Sykes — flagged APUS as a volatility-driven momentum play. The headlines frame this as traders hunting volatile breakouts rather than a fundamental catalyst. On the SEC side, the company filed a routine bylaws 8-K on September 23 and an agreement 8-K on September 11, both tagged neutral — neither appears to be the trigger. The catalyst is effectively momentum and retail-trader attention rather than a disclosed business event.

Technical picture: APUS gapped up a massive +205.2% at the open (meaning it opened far above yesterday's close before pulling back to the +122% day gain by 4 PM). RSI closed at 69 — elevated but not yet technically overbought — while ADX of 22 suggests the trend strength is moderate. The MA stack is mixed and the trend-template score is a low 2/7, meaning this is not a fundamentally healthy uptrend. StockSetups' conviction score is 38/100 with a grade of D, reflecting that the technicals don't support a sustained move.

Short squeeze angle: The short-squeeze score is a modest 27/100. Short interest is tiny (just 19,919 shares) with 0.1 days to cover, so this is not a squeeze story — shorts had almost no position to cover. The free float is 54.4%. With a $7.7M market cap and no clear catalyst, APUS fits the profile of a low-float momentum name (a stock with a small number of shares available to trade publicly, making it easy for volume surges to whip the price around). These moves are as fast to reverse as they are to ignite. APUS also appeared in our premarket recap this morning.

SRZN — Surrozen, Inc./DE (+108.2%)

Surrozen closed at $33.65, more than doubling on volume of 6.2 million shares — approximately 12.7× its 20-day average of 487K shares. At a market cap of $395.4 million, this is a much larger and more liquid name than the other movers on today's list, which makes the magnitude of the move all the more striking.

Why it moved: No researched catalyst headline is on file for SRZN for today's session. However, the technical and short-interest data tell a compelling story. With 1.45 million shares short and 7.7 days to cover — meaning short sellers would need 7.7 average-volume days to buy back all their borrowed shares — SRZN was sitting on significant short-squeeze fuel heading into today. A short squeeze occurs when a heavily shorted stock rises sharply, forcing bearish traders to buy back their shares to limit losses, which in turn pushes the price even higher. SRZN also appeared in this morning's premarket movers recap, hinting the momentum was already building before the open.

Technical picture: The stock gapped up +88.1% at the open and held most of those gains through the close — a sign of genuine demand rather than a fade. RSI closed at a hot 77, well into overbought territory, and ADX of 33 confirms a strong directional trend in place. Crucially, SRZN closed just -1.4% below its 52-week high, indicating this is not a beaten-down name recovering — it was already near the top of its range. StockSetups' conviction score is an impressive 86/100 with a grade of A+, and the technical rank is 93/100.

Short squeeze & smart money: The squeeze score is a standout 95/100 — one of the highest readings possible and consistent with the short-pressure dynamics described above. Short volume today was 63% of total volume, which means more than half of today's trades involved shares being sold short, potentially by traders trying to fade the move. The smart-money score is 32/100, with the largest disclosed institutional stake at 9.9%. Given the absence of a named catalyst, traders should treat this primarily as a squeeze-and-momentum event until confirmed otherwise.

GLND — Greenland Energy Co (+83.0%)

Greenland Energy closed at $5.33, up 83% on massive volume of 133.2 million shares — about 5.8× its 20-day average of 23.1 million. With a market cap of $232.9 million and that kind of sustained volume, GLND was far and away the most actively traded name on today's mover list in raw share count.

Why it moved: Yahoo Finance reported that Greenland Energy announced an extension of its Jameson Land Farm-Out Agreement with 80 Mile plc. A farm-out agreement is a deal in which an energy company brings in a partner to share exploration costs and rights on a project — extending one signals continued commitment to and confidence in the underlying asset. This is the most concrete business catalyst on today's list. The deal announcement provided a clear fundamental reason for buyers to step in, and the prior week's backdrop — headlines about a Greenland security pact and rare earth supply race (per Yahoo Finance on September 22) — appears to have already been building investor interest in the name.

Technical picture: StockSetups flagged a three inside up candlestick pattern on GLND — a three-candle bullish reversal signal where a small candle forms inside the prior red candle, then a third candle closes above both, confirming buyers are back in control. RSI surged to 86, deeply overbought, and ADX of 39 shows a powerful trend. The conviction score is a maximum 100/100 with a grade of A+. Notably, despite the massive one-day gain, the stock sits -59% below its 52-week high, underscoring how far it had fallen before today's bounce.

Smart money & insider activity: The largest disclosed institutional stake is 5.8%. More interesting is the insider buying: director Larry G. Swets Jr. made six separate open-market purchases between May 13 and June 8, accumulating at least 110,000 shares for roughly $256,000 in total. Consistent insider buying at market prices is typically viewed as a vote of confidence from someone with inside knowledge of the business. Reddit activity is also picking up — GLND ranked #45 on r/all-stocks today with 9 mentions, up from 4 the prior 24 hours. GLND has appeared across several recent StockSetups recaps, including September 21's top movers and September 21's premarket recap.

PMAX — Powell Max Ltd (+78.4%)

Powell Max closed at $1.63, up 78.4% on volume of 81.35 million shares — roughly 19.5× its 20-day average of 4.17 million. The market cap is just $3.6 million, making this the smallest company on today's list by a wide margin.

Why it moved: No catalyst headline, SEC filing trigger, or researched news is on file for PMAX. With a $3.6M market cap, a float of 45.3%, and a price that sits -96.4% below its 52-week high, Powell Max is a deeply distressed micro-cap. At that level of dislocation from its annual high, even a small influx of retail order flow can produce enormous percentage moves. The 19.5× relative volume confirms an unusual spike in trader attention, but the source of that attention is unclear from available data — this looks like a pure momentum play with no identified fundamental driver.

Technical picture: The stock gapped up just +5.1% at the open, meaning most of the day's gain was built intraday — a sign of accumulating buying pressure through the session rather than a single gap event. RSI of 72 is elevated, and ADX of 27 suggests a developing but not yet mature trend. The MA stack is mixed. StockSetups assigns a conviction score of 38/100 and a grade of D, with a trend-template score of 2/7 — signaling that the broader technical structure is weak.

Short squeeze angle: The squeeze score is 29/100. Short interest is negligible at just 2,836 shares with 0.1 days to cover, so there is essentially no short position to squeeze. Short volume ran at 60% today, suggesting active intraday short selling against the move. With no catalyst, a tiny market cap, and a stock that has lost 96% of its value from the 52-week high, PMAX carries extreme risk for anyone chasing it at elevated levels. This is the definition of a name to watch — not chase.

STAK — STAK Inc. (+52.7%)

STAK closed at $1.44, up 52.7% on volume of 43.54 million shares — about 17.1× its 20-day average of 2.54 million. The market cap is $19.0 million and the stock remains -84.5% below its 52-week high, another deeply distressed name making a dramatic single-day recovery.

Why it moved: No catalyst headline is on file for STAK. The company filed a 6-K (a foreign private issuer report) on September 15, tagged as a neutral foreign event filing — nothing that explains a 52% same-day move. With a 100% free float (meaning all shares are available to trade publicly, with no lock-up), this name is not a classic low-float squeeze candidate. The move appears to be momentum- and volume-driven, likely amplified by the broader environment of active retail participation across small-cap names today.

Technical picture: StockSetups detected a bullish engulfing candle on STAK — a pattern where today's candle completely "engulfs" the prior day's candle body, with a lower open and a higher close, signaling that buyers overwhelmed sellers decisively. RSI at 53 is notably calmer than the other names on this list — not yet overbought — and ADX of 34 indicates a real trend developing. The conviction score is 42/100 with a grade of D, but the RS rating of 99 means STAK's relative price strength ranks in the top 1% of all stocks over the relevant period — an indicator that price momentum is strong even if the fundamental picture is unclear.

Squeeze read: The squeeze score is 53/100 — above average. Short interest of 489,113 shares with 0.6 days to cover is not extreme, but with 56% short volume today, there may have been some forced covering contributing to the upward pressure. The full float means any squeeze effect would be more diffuse than in a true low-float scenario. Until a catalyst surfaces, treat this as a momentum event.

The bottom line

Today's biggest gainers were a mix of a squeeze (SRZN), a news-driven energy play (GLND), and three momentum/volume events with no clearly identified catalysts (APUS, PMAX, STAK). What they shared: extreme relative volume, elevated RSI readings, and the kind of single-day volatility that attracts retail attention as fast as it destroys capital for traders who chase without discipline.

A few honest reminders before you act on anything above:

• Big one-day gainers frequently give back much of the move in the days that follow, especially when no durable fundamental catalyst exists.
• Overbought RSI readings, extended gaps, and high short-volume can all signal a name is ripe for a reversal — not a continuation.
• Low-float and micro-cap stocks are particularly susceptible to violent reversals because the same thin liquidity that turbocharged the move works just as hard on the way down.
• Pattern signals and squeeze setups fail regularly — no score or grade guarantees a trade works.

Always size positions appropriately for the risk, use stop-losses, and do your own research before acting. Nothing here is financial advice or a recommendation to buy or sell any security.

StockSetups scans the full ~12,300-stock US universe after every close, detecting confirmed chart patterns, computing conviction and squeeze scores, and sorting the strongest setups into actionable lanes. Check back after tomorrow's close — or first thing in the morning for the premarket edition — for the next day's biggest movers.