Premarket Stock Movers — September 11, 2026: Why TNON, ACVA, TRUG, AENT & LBGJ Are Surging

TNON — Tenon Medical, Inc. (+51.9%)

Tenon Medical is surging +51.9% to $8.05 in Friday's premarket, trading on 28.4 million shares — more than five times its 20-day average of 5.4 million. For a company with a market cap of just $3.5 million, that kind of volume is extraordinary and signals that retail momentum is firmly in the driver's seat this morning.

Why it's moving: This move is building on a catalyst that emerged Wednesday evening. Tenon Medical announced the early repayment of its $5.16 million in convertible notes, fully retiring the debt ahead of schedule. Convertible notes are a form of borrowing that can convert into new shares — a constant dilution overhang for shareholders. By wiping them out entirely, the company has eliminated what traders call dilution risk: the threat that the share count would expand and water down existing shareholders' stakes. Benzinga noted the stock had already soared nearly 24% after hours on September 10 on this news, and the premarket is now extending that leg higher significantly. This is the second consecutive morning TNON has appeared in the premarket spotlight — it also featured in yesterday's premarket recap and finished as one of the top after-close gainers on September 10.

The technical setup: The daily chart through September 10 shows TNON carrying an RSI of 56 (neutral, not yet overbought) and a strongly trending structure with an ADX of 42 — the ADX (Average Directional Index) measures trend strength on a 0–100 scale; readings above 25 indicate a meaningful trend, and 42 is emphatic. The moving-average stack is bullish, and StockSetups assigns a conviction score of 96/100 with a grade of A+ — the highest reading among this morning's movers. The RS rating of 99 means TNON's price performance is in the top 1% of the ~12,300-stock universe over the past year.

The short-squeeze setup here is modest — a squeeze score of 28/100 and just 8,042 shares short with 0.1 days to cover — so this is a fundamental catalyst move, not a squeeze. The risk: the stock is still 53.5% below its 52-week high, and at a $3.5M market cap with a recent dilution history (see bearish 8-Ks from late August), extreme volatility in both directions is very possible once the regular session opens.

ACVA — ACV Auctions Inc. (+44.7%)

ACV Auctions is the standout fundamental story of the morning. The online wholesale auto-auction platform is trading +44.7% to $10.45 on massive volume — 34.8 million shares against a 20-day average of just 3.4 million. That's more than 10× normal activity before the opening bell, making it the most liquid name on this morning's mover list.

Why it's moving: The catalyst is a definitive $1.9 billion all-cash acquisition by Copart, the publicly traded vehicle auction giant. Multiple sources confirm Copart is launching a $10.50 per share cash tender offer — a tender offer is when an acquiring company offers to buy shareholders' shares directly at a fixed price. At $10.45, ACVA is trading essentially in line with the deal price, which is the classic behavior of a stock in a confirmed buyout: the shares converge toward (but rarely exceed) the offer price as investors speculate on deal certainty and timing. The SEC filings corroborate the deal's formality: ACV filed an 8-K disclosing a material agreement and a SC TO-C (a Schedule TO communication related to a tender offer) on September 10 — both standard filings in a public acquisition.

The technical setup: The September 10 daily chart shows ACVA had been in a mixed trend — RSI 49, ADX 15 (a weak trend), and a mixed moving-average stack — sitting 30.8% below its 52-week high with a modest conviction score of 56/100 and a grade of C. In other words, ACVA was not a technically strong setup heading into today; this is entirely a deal-driven move. The squeeze score of 46/100 and 15.2 million shares short (2.3 days to cover) mean shorts are being squeezed out as they rush to cover their positions — a short squeeze occurs when rising prices force traders who bet against a stock to buy shares to limit losses, accelerating the rally. That short-covering is adding fuel to the tender-offer pop.

The key risk here is deal risk: all-cash acquisitions are generally lower-risk than stock deals, but they can still fall through (regulatory challenges, financing issues). Traders buying above the offer price of $10.50 would be taking on that risk directly.

TRUG — TruGolf Holdings, Inc. (+38.5%)

TruGolf Holdings, maker of indoor golf simulation equipment, is jumping +38.5% to $0.51 this morning on 75.4 million shares — more than seven times its 20-day average of 10.5 million. At a market cap of just $518,000, this is a micro-nano-cap stock where even modest dollar volumes can produce outsized percentage swings.

Why it's moving: The most recent identifiable catalyst is a binding distribution Memorandum of Understanding (MOU) announced September 8, in which TruGolf signed an agreement with TruGolf Canada Inc. to expand its reach into defined Canadian and Indigenous markets. An 8-K filed September 9 formalizes a related agreement. MOUs are non-binding letters of intent in many cases, but TruGolf describes this one as "binding." That said, the headline is several days old — and given the stock's extreme price level ($0.51) and tiny market cap, today's surge appears to be largely momentum-driven, with retail traders piling into a low-priced name on light volume.

The technical setup: The prior-session daily chart is bearish across the board. RSI is 33 (approaching oversold territory), ADX is 20 (a weak trend), and the moving-average stack is bearish. StockSetups assigns a conviction score of 4/100 and a grade of D, a technical rank of 5, and a squeeze score of just 2/100. TRUG is also 92.3% below its 52-week high — meaning shareholders who bought near the top have suffered devastating losses. There is also a pending delisting risk: an August 21 8-K flagged a delisting event, and two late-August 8-Ks flagged dilution. The free float is 97.3% (a large float means the move requires more sustained buying pressure to maintain).

This is one of the higher-risk names on today's list. Stocks with this technical profile, sub-dollar price, nano-cap market cap, and pending delisting notices are notorious for sharp reversals. Treat with extreme caution.

AENT — Alliance Entertainment Holding Corp. (+29.5%)

Alliance Entertainment — a distributor of physical media including DVDs, Blu-rays, and video games — is up +29.5% to $7.24 in the premarket on 4.6 million shares, compared to a 20-day average of just 47,840. That's roughly 97× normal volume before the open, an extraordinary surge in activity for a stock that typically trades fewer than 50,000 shares in a full day.

Why it's moving: Alliance Entertainment reported fiscal year 2026 earnings after the close on September 10, filing a 10-K annual report and an earnings 8-K with the SEC. According to headlines, the company posted full-year revenue of $1.15 billion, up 8% year-over-year, and results spotlighted continued momentum in physical media — a category many assumed was in terminal decline. The strong top-line growth appears to have surprised investors positioned for further deterioration, triggering a sharp gap up. (Note: one headline flagged a 70% intraday move at some point, but this premarket reading is +29.5% — the regular session has not yet opened.)

The technical and squeeze setup: The daily chart through September 10 shows a mixed picture: RSI 54, ADX 18 (weak trend), and a bearish MA stack, with a conviction score of 22/100 and a D grade. However, the squeeze setup is notable: AENT has a squeeze score of 47/100, a free float of just 19.2% (meaning the vast majority of shares are locked up and not freely trading — a "low-float" stock), and 28.0 days to cover (the highest on this morning's list). Days to cover measures how many days of average volume it would take short sellers to buy back all their borrowed shares; at 28 days, any sustained rally could force a painful short squeeze. With 334,095 shares short against a tiny float, the short-covering dynamic is amplified.

The risk: GuruFocus flags AENT as significantly overvalued on its GF Value metric even before today's move. A one-day earnings pop on 97× normal volume in a low-float name is classic setup for a sharp reversal once momentum fades.

LBGJ — Li Bang International Corp Inc. (+28.1%)

Li Bang International, a small-cap company trading on Nasdaq, is up +28.1% to $2.51 this morning on 3.9 million shares — about 4.5× its 20-day average of 867,000. At a $36.7 million market cap, it's the largest company by market cap among the micro-cap names on today's list (outside of ACVA and AENT).

Why it's moving: No fresh catalyst from live web research is available this morning. The most recent headline (Kalkine, September 9) is a general profile piece, and the most recent SEC filings are two 6-K foreign-event disclosures filed in early and mid-August. With no clear news catalyst, today's move appears to be technically and momentum-driven.

What is notable, however, is the insider buying signal: the CEO, Huang Feng, purchased 73,147 shares worth approximately $249,000 on August 17, and another insider, Li Funa, bought 15,088 shares worth $51,000 on the same date. Insider buying — particularly by CEOs using their own money — is often interpreted as a signal of confidence in the company's outlook. StockSetups registers a smart-money score of 60/100, the highest on today's list, which factors in this insider activity.

The technical setup: The prior-day chart shows a strong ADX of 48 (a well-established trend), an RSI of 40 (room to run before overbought conditions), and a mixed MA stack. The conviction score is 62/100 with a grade of B, and the RS rating of 98 places it in the top 2% of all US stocks on a relative-strength basis — meaning it has been quietly outperforming most of the market over the trailing year. The trend-template score of 6 (out of 7, a Minervini-style trend checklist) suggests LBGJ's longer-term structure is sound.

The squeeze setup is minimal — a squeeze score of 15/100 and just 0.1 days to cover — so this is not a short-squeeze story. With no confirmed catalyst, the move is harder to anchor fundamentally, and momentum-driven moves without news tend to be the most fragile.

The bottom line

This Friday morning's premarket is led by a mix of genuine fundamental catalysts and momentum-driven spikes. ACVA has the clearest, most anchored reason to move — a definitive all-cash acquisition at a fixed price — while TNON and AENT are reacting to specific balance-sheet and earnings news. TRUG and LBGJ are harder to pin to fresh catalysts and carry more speculative risk.

A few honest reminders before the open:

• Premarket prices are not final. Volume is thinner before 9:30 AM ET, spreads are wider, and prices can shift materially once the regular session begins. A stock up 40% pre-open can open flat — or gap the other way.
• Chasing extended premarket movers is high-risk. The biggest one-day gainers frequently give back a large portion of their move in the same session. That's not a reason to avoid them, but it is a reason to plan entries and exits carefully.
• Technical patterns, squeeze setups, and news catalysts all fail. No signal is a guarantee.
• Always size positions to what you can afford to lose, use stop-losses, and do your own research before trading any of these names.

StockSetups scans the full ~12,300-stock US universe every premarket morning — detecting chart patterns, computing conviction and short-squeeze scores, and surfacing setups before the open so you can be prepared, not reactive. Check back after today's close for the full after-hours recap of how these movers resolved.