Stocks that are showing the most significant changes before the market opens: Ultralife, SK Hynix, Robinhood, Enphase Energy and others

October 28, 2026

Premarket Moves in Key Companies

Here are some notable movements in company shares before the market opened:

Ultralife — Shares skyrocketed by over 144% following EnerSys’s announcement to buy the battery producer for $16 per share in cash. This deal values Ultralife at around $320 million, and it was revealed after the market closed on Tuesday. EnerSys’s shares rose by 2% as well.
Enphase Energy — The solar company’s stock dropped more than 18% after its quarterly revenue decreased to $293.3 million, down from $410.4 million the previous year.
PPG Industries — Shares climbed by 6% after PPG reported record earnings of $2.25 per share on an adjusted basis and raised its full-year earnings guidance midpoint.
Robinhood — Shares fell by 7% as the brokerage reported quarterly profits that fell short of expectations. Although revenue increased by 12% to $1.42 billion, net income declined by 14% to $476 million, and cryptocurrency revenue plummeted by 55% to $120 million. The ongoing slowdown in cryptocurrency markets has been impacting trading activity and revenue.
SK hynix — The chipmaker saw a 7% increase in shares after it reported record quarterly results, driven by strong demand for memory products related to artificial intelligence. The company also announced a special dividend connected to profits from its Kioxia investment.
Logitech — Shares of the computer peripherals maker fell by over 11% after mixed results in its fiscal second quarter. While adjusted earnings per share of $1.51 surpassed the FactSet consensus of $1.30, operating income was below expectations at $200.6 million.
Vertiv — This critical digital infrastructure stock surged 16% after the third-quarter report exceeded expectations, along with a stronger-than-expected guidance for both the current quarter and the full year. Adjusted earnings of $2.21 per share beat the $1.82 anticipated by analysts, and revenue of $4.31 billion surpassed the consensus estimate of $3.75 billion.
GE Vernova — Shares increased by over 1% after the energy equipment company announced its acquisition of high-voltage components manufacturer Trench Group for around $9 billion. The company also raised its full-year revenue forecast to $47 billion.