Stocks traded with notable dispersion on Wednesday as company-level announcements and earnings reactions produced pronounced winners and losers across market-cap categories. Semiconductor and industrial names showed strength among the largest-cap names, while banking and select technology shares weakened. Below we detail the most significant movers organized by market-cap band.
Mega-Cap Movers
- Micron Tech (MU) +8.73% - Micron led gains among the largest-cap group.
- Caterpillar (CAT) +3.47%
- GE Vernova LLC (GEV) +3.73%
- Exxon Mobil (XOM) +2.55%
- Lam Research Corp (LRCX) +3.67%
- Palantir Technologies Inc (PLTR) -3.56% - Palantir extends multi-year agreement with Airbus for Skywise platform.
- Citigroup (C) -3.64%
- Wells Fargo (WFC) -3.48%
- Bank Of America (BAC) -3.77%
- IBM (IBM) -5.95%
Large-Cap Stock Movers
- Unity Software Inc (U) -26.39% - Unity appointed Match Group CEO Bernard Kim to its board of directors.
- Borgwarner (BWA) +21.85%
- GS Acquisition A (VRT) +21.62%
- Tenet Healthcare (THC) +17.62% - Tenet Healthcare beats Q4 expectations and issues a solid 2026 outlook.
- Globalfoundries (GFS) +15.08%
- Solstice Advanced Materials (SOLS) +15.86% - Solstice Advanced Materials misses Q4 earnings expectations.
- Silversun Tech (QXO) +14.24% - QXO to buy Kodiak Building Partners for $2.25B - Reuters.
- Astera Labs (ALAB) -19.49% - Astera Labs falls as Q1 guidance dampens strong Q4 results.
- Zillow Group Inc (ZG) -17.27%
- Generac Holdings (GNRC) +19.96%
Mid-Cap Stock Movers
- Teradata (TDC) +26.62% - Teradata soars 16% as guidance impresses following Q4 earnings and a revenue beat.
- Diodes Inc (DIOD) +25.72% - Diodes shares surge as strong Q1 guidance outweighs an earnings miss.
- SOLV Energy Inc (MWH) +19.6%
- Acadia Healthcare (ACHC) +12.85%
- Centrus Energy (LEU) -20.32%
- Mattel Inc (MAT) -23.51% - Mattel shares tumble 9% as Q4 results and guidance fall short of expectations.
- Pegasystems Inc (PEGA) -14.42% - Pegasystems shares fall 5% as net income declines year-over-year despite a better-than-expected Q4.
- Lyft (LYFT) -15.67%
- Upstart Holdings Inc (UPST) -14.37% - Upstart is described as having shares soar 11% as 2026 revenue guidance tops estimates; the session shows a -14.37% move.
- Avantor Inc (AVTR) -16.08% - Avantor shares fall over 5% as a revival program fails to impress.
Small-Cap Stock Movers
- Upstream Bio (UPB) -44.26% - Upstream Bio to report verekitug phase 2 trial results for severe asthma.
- Mntn Inc (MNTN) +39.36% - MNTN soars 40% as fourth quarter earnings crush expectations.
- Rapid7 Inc (RPD) -28.29% - Canaccord Genuity downgrades Rapid7 stock to Hold on a weak FY26 outlook.
- Aehr Test Systems (AEHR) +25.34%
- Kornit Digital Ltd (KRNT) +22.12%
- Angies List Inc (ANGI) -22.24%
- MUU (MUU) +17.48%
- Fortrea Holdings (FTRE) -13.68%
- CONL (CONL) -14.16%
Trading on Wednesday was characterized by distinct company-specific catalysts: contract renewals and platform agreements lifted some software and industrial names, earnings beats and upbeat guidance buoyed selected technology and services firms, while downgrades, guidance cuts or disappointing results weighed on others. The session underscores how single-company developments can generate outsized moves across market-cap segments and sectors, producing both double-digit gains and steep drawdowns within the same trading day.
Investors monitoring sector flows should note the presence of semiconductor strength among mega-caps and notable movement in banking names to the downside. Healthcare and biotech companies also appear on the list of most-active small- and mid-cap movers, reflecting ongoing sensitivity to trial results and earnings commentary.