Premarket Movers: Ultralife Soars on EnerSys Deal, Enphase Sinks on Weak Outlook
US stock futures split ahead of Wednesday's open, with Dow futures down 0.2%, S&P 500 futures up 0.1%, and Nasdaq 100 futures up 0.4%. The Federal Reserve's rate decision lands at 2 pm ET, and traders expect no change despite sticky inflation.
Biggest premarket movers, Oct. 28, 2026
| Company | Move | Catalyst |
|---|---|---|
| Ultralife | +143.8% | EnerSys to acquire it in all-cash deal valued at about $320M |
| Vertiv | +15.1% | Q3 beat and raised full-year outlook |
| Wendy's | +15% | Trian offer to buy company for $1.4B |
| Ultra Clean Holdings | +12% | Record Q3 results and upbeat current-quarter forecast |
| Amphenol | +7.5% | Q3 beat with strong Q4 view |
| SK hynix | +7.4% | Record Q3 on AI memory demand |
| Etsy | +6.6% | Q3 earnings and revenue beat |
| PPG Industries | +6% | Record adjusted quarterly earnings, raised guidance midpoint |
| GE HealthCare | +5.4% | Q3 beat and raised 2026 outlook |
| Enphase Energy | -18.3% | Q3 miss and weak Q4 revenue guidance |
| Boston Scientific | -12% | Weak Q4 view and cut full-year forecast |
| Logitech | -11.3% | Soft Q3 net sales guidance |
| NXP Semiconductors | -8.5% | Q4 outlook disappointed |
| Robinhood | -8% | Transaction revenue fell short |
| SolarEdge | -7.1% | Selloff in solar after Enphase results |
| F5 | -6.6% | Weak fiscal 2027 outlook |
| VF Corp | -5.5% | Profit taking despite earnings beat |
Earnings drive the morning
Vertiv surged 15.1% before the bell. The data center power and cooling supplier earned an adjusted $2.21 per share last quarter against the $1.82 analysts polled by FactSet expected, lifted its full-year targets, and said organic orders more than doubled from a year earlier.
Enphase Energy sank 18.3% in premarket trading. The solar inverter maker missed on both lines and guided fourth-quarter revenue well under Wall Street forecasts, blaming soft residential solar demand and higher borrowing costs. SolarEdge Technologies slid 7.1% as the read-across hit the rest of the sector.
SK hynix climbed 7.4% after a record quarter built on artificial intelligence memory demand. Operating profit jumped 632% from a year ago, and the Korean chipmaker pledged its largest shareholder return yet, alongside a special dividend linked to its Kioxia stake.
NXP Semiconductors dropped 8.5% as a solid third quarter got overshadowed by a fourth-quarter revenue forecast that landed under expectations. Amphenol went the other way, rising 7.5% on a beat and an upbeat current-quarter view.
Robinhood fell 8% after transaction revenue came in light. Revenue grew 12% to $1.42B, but net income declined 14% to $476M and crypto revenue was cut by more than half as trading activity cooled.
Boston Scientific sank 12% after missing on earnings and trimming its full-year profit outlook. The device maker is still working through fallout from an August cyberattack that disrupted manufacturing and shipping.
Logitech sank 11.3% despite beating on adjusted earnings per share. Guidance for the current quarter's sales disappointed, and operating income fell short.
GE HealthCare rose 5.4% on a beat and a raised 2026 forecast, helped by volume growth and pricing. Etsy gained 6.6% after topping estimates, while PPG Industries added 6% on record adjusted quarterly earnings and a higher guidance midpoint.
F5 fell 6.6%. The networking and security firm beat for its fiscal fourth quarter but flagged thinner gross margins ahead. VF Corp slipped 5.5% even after an earnings beat, with investors cashing in on a pre-results run.
Deal news moves the rest
Ultralife soared 143.8%, the biggest gainer of the morning, after EnerSys agreed to buy the battery maker in an all-cash deal valued at about $320M.
Wendy's surged 15% after Trian offered to take the burger chain private in a cash deal worth $1.4B.
Ultra Clean Holdings climbed 12% on record quarterly results and a strong forecast for the current period, with revenue up nearly 49% from a year ago.
Microsoft and Alphabet both report after the closing bell, with AI spending plans the main attraction. Ford, T-Mobile, eBay, Chipotle, and ServiceNow also report today, and the Fed announces its rate decision at 2 p.m. ET.
