Premarket Movers Oct 26, 2026: Why SPRC, RENT, XNCR Are Up

SPRC — SciSparc Ltd. (+38.5%)

SciSparc is up 38.5% to $1.51 in premarket trading. About 11.1 million shares have changed hands, versus a 20-day average of roughly 1.8 million for a full session. Premarket volume is usually lighter than regular hours, so that is a heavy turnout. The market cap is only $4.9M.

The likely driver is a StocksToTrade piece from today saying traders are watching the SCI-110 trial and an "AI pivot." A Stock Titan item from Friday said three sites, including Yale, are waiting on Tourette trial supplies from a SciSparc subsidiary. The company also filed a 6-K on October 23, which was labeled neutral. No filing or announcement dated today explains the size of the jump.

The prior-day chart is weak. RSI was 15, which is deeply oversold, and the moving-average stack was bearish. The stock sits 97.3% below its 52-wk high, with a relative strength rating of 1 and a conviction score of 36/100 (grade D). A gap is the space between one session's close and the next open. SPRC's last gap was -2.5%.

Squeeze risk looks low. The squeeze score is 11/100, short interest is just 15,480 shares (0.3 days to cover), and a short-sale restriction is active. This is a micro-cap spike, and such spikes often fade.

RENT — Rent the Runway, Inc. (+35.4%)

Rent the Runway is up 35.4% to $3.10 premarket on about 11.0 million shares. Its 20-day average is only about 141,766. Market cap is $77.3M.

The most likely catalyst is insider buying, though the full move isn't confirmed. Benzinga reported today that the stock gained 27% to $2.92 premarket after insider purchases. The buys we could verify came from a 10% owner and a director-linked investor, not from executives. One firm bought 632,922 shares on October 21 for about $2.25M, at $3.55 per share. Those trades were already public: the Form 4 was signed October 23, and Investing.com reported them October 24. No filing dated today confirms the move.

On the prior-day chart, RSI was 59 and the moving-average stack was bearish. The stock is 75.6% below its 52-wk high, with a relative strength rating of 16 and conviction of 36/100 (grade D). It carries a smart-money flag, with a largest disclosed stake of 62.0%.

Short interest is large: 1.36 million shares, or 38.3 days to cover. That means it would take more than 38 average sessions of volume to buy back all the shorted shares. The squeeze score is 46/100. A squeeze happens when shorts rush to buy back shares and push the price up further. Treat it as a risk factor, not a forecast.

XNCR — Xencor Inc (+29.7%)

Xencor is up 29.7% to $32.63 premarket on about 1.26 million shares. That is already close to its 20-day average of about 1.43 million. Market cap is $1.9B, much larger than the other names here.

The catalyst is Phase 1 data for XmAb819, its kidney cancer candidate. Benzinga reports Xencor presented the data at ESMO on Sunday. It showed a 45.5% confirmed response rate in advanced clear cell renal cell carcinoma. Seeking Alpha adds that plans for accelerated FDA discussions and a strong cash position also supported the gain. Other outlets put the move nearer 24–27%, and the details come from secondary news coverage.

The prior-day setup was neutral to constructive. RSI was 54, the trend stack was mixed, and the stock sat 14.2% below its 52-wk high. The relative strength rating was 96 and the technical rank 89, though conviction was only 49/100 (grade D). Wedbush had reiterated an Outperform rating with a $30 target on October 23.

The squeeze score is 96/100, the highest in this group. Short interest is 14.9 million shares, or 9.5 days to cover, with 100% free float and 79% short-volume. The smart-money score is 30/100. Biotech gaps on trial data can reverse quickly.

CLRO — CLEARONE INC (+20.2%)

ClearOne is up 20.2% to $3.87 premarket on about 9.6 million shares. Its 20-day average is about 2.5 million. Market cap is $8.6M.

No news, filing or announcement explains today's move. Recent headlines from StocksToTrade and Timothy Sykes describe a volume spike and a volatile micro-cap, which points to momentum-driven trading. For context, an October 15 8-K covered an agreement, and an October 13 8-K was flagged bearish for delisting. We can't tie either to this move. We covered CLRO's recent activity in Top Stock Movers Oct 23, 2026.

The prior-day chart was bearish. RSI was 47, the stock sat 76.7% below its 52-wk high, and the relative strength rating was 14. Conviction was 40/100 (grade D). The gap is +22.4%. Free float is just 32.7%, a low-float profile where fewer shares can trade, so prices can swing hard. Short interest is only 24,903 shares (0.5 days to cover), and the squeeze score is 34/100. The largest disclosed stake is 61.3%.

YMAT — J-Star Holding Co., Ltd. (+20.1%)

J-Star is up 20.1% to $2.45 premarket on about 3.9 million shares. Its 20-day average is about 11.8 million. Market cap is $28.5M.

The most likely catalyst is the first-half 2026 interim results filed October 23. Benzinga's premarket list showed the stock up 23.9% to $2.54 on the results. First-half sales were $6.767 million, down from $10.6 million a year earlier, with a loss of 39 cents per share. Management tied the drop to exiting legacy China OEM work and pivoting to U.S. drone manufacturing. Total equity swung to a positive $2.8 million from a deficit of $6.8 million after an $8.2 million related-party loan was converted into shares. Some sites credit an earlier Houston carbon-fiber announcement from October 19–21, but that predates today. No filing dated today confirms the move. See also Premarket Movers Oct 23, 2026.

On the prior-day chart, RSI was 55 and the trend stack was mixed. The stock is 81.8% below its 52-wk high. The relative strength rating was 18, the technical rank 71, and conviction 0/100 (grade D). The gap was +33.9%.

The float is the story. Free float is only 1.7%, which is extremely low and can make price moves violent. Short interest is 19,393 shares (1.3 days to cover) and the squeeze score is 49/100.

The bottom line

These are the most volatile stocks on the tape, and most are micro-caps or low-float names. Premarket prices come on thin volume and can reverse at the open. Chasing extended gainers is high-risk, and patterns and squeezes often fail. Size positions carefully, use defined stops (see where to place a stop loss), and do your own research. This is educational, not financial advice.

StockSetups scans the full US universe after every close and every premarket morning. It surfaces patterns, squeeze scores and smart-money signals so you can see the setup behind the headline.