Top Premarket Gainers

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PRF Technologies (PRFX) shares were up over 250% in Friday premarket activity after the company updated investors on the development of its DeepSolar Predict renewable energy revenue optimization platform ahead of a planned commercial launch.

Sunlands Technology Group (STG) stock was 123% higher after the company said its board authorized a plan to buy back up to $50 million of its Class A ordinary shares in the form of American depositary shares over the next 36 months.

HUB Cyber Security (HUBC) shares were up 52% after an investor filed an amended disclosure with the US Securities and Exchange Commission, showing a 15.6% beneficial ownership stake in the company.

Nexera Technologies (NEXR) stock was 47% higher, adding to a 5% rise in the Thursday session.

Olenox Industries (OLOX) shares were up 46% after the company said it closed the acquisition of CS Digital Ventures.

QTREX Quantum (QTEX) stock was 36% higher following the previous session's 42% increase.

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