U.S. stocks headed south on Tuesday, with the Dow Jones index shedding more than 100 points. But if you were watching individual names instead of the indices, there was plenty of action worth paying attention to.

The star of the show was Cementos Pacasmayo SAA (CPAC), which soared after Holcim inked an agreement to acquire 50.01% of Inversiones Aspi S.A., the Hochschild Group entity that owns the cement company. That's the kind of news that gets investors excited about a potential premium, and the market responded accordingly.

Cementos Pacasmayo shares rocketed 47.4% to $10.30 on Tuesday, easily claiming the title of biggest gainer in this rundown.

Other Notable Gainers

Beyond the headline acquisition story, several other companies posted impressive moves worth noting:

Rezolve AI PLC (RZLV) climbed 23.7% to $2.87 after releasing preliminary December revenue results that apparently resonated with investors.

Emerald Holding Inc (EEX) jumped 17% to $4.14 following the company's announcement that it's kicked off a review of potential strategic options. Translation: someone's been knocking on the door about a possible acquisition, and management is taking it seriously enough to explore their options.

NovaBay Pharmaceuticals Inc (NBY) gained 16.2% to $3.15, though the company didn't announce any specific catalyst for the move.

Tilray Brands Inc (TLRY) surged 15% to $12.57 in a strong session for the cannabis company.

Clearpoint Neuro Inc (CLPT) jumped 14.2% to $14.14, continuing its upward momentum.

Fermi Inc (FRMI) gained 11.4% to $9.57 without any apparent company-specific news driving the action.

Sezzle Inc (SEZL) surged 9.6% to $72.49 after the buy-now-pay-later company authorized a $100 million stock buyback program, signaling confidence in its valuation.

WW International Inc (WW) gained 7.8% to $26.19 as Weight Watchers unveiled a fully integrated platform designed for the GLP-1 era, adapting to the weight loss drug landscape.

Circle Internet Group Inc (CRCL) rose 7.7% to $81.24 in the crypto-adjacent space.

Lemonade Inc (LMND) surged 7.4% to $80.59, extending recent gains for the insurance technology company.

Netskope Inc (NTSK) gained 6.9% to $20.37 in the cybersecurity sector.

Ascentage Pharma Group International (AAPG) rose 6% to $29.26 in biotech trading.

RH (RH) gained 5.5% to $172.60 despite Barclays analyst Seth Sigman maintaining an Overweight rating while slashing the price target from $385 to $283. Sometimes investors focus on the rating rather than the reduced target.

Affirm Holdings Inc (AFRM) rounded out the list with a 4.4% gain to $68.56, adding to recent momentum in the fintech space.