Stock Markets August 13, 2026 02:05 PM

Tech and Small Caps Drive Thursday’s Market Swings; SanDisk Leads Gains

Semiconductor names and several small-cap companies post sizable moves while select retailers and platforms retreat

By Priya Menon
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SNDK LRCX INTC ARM PLTR

Thursday’s session produced sizable intraday shifts across market-cap tiers. SanDisk and Lam Research were among the biggest gainers in the mega-cap group, while a mix of large-, mid- and small-cap names recorded both double-digit advances and declines tied to earnings outcomes and other company-specific developments.

Tech and Small Caps Drive Thursday’s Market Swings; SanDisk Leads Gains
SNDK LRCX INTC ARM PLTR
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Key Points

  • SanDisk (SNDK) led mega-cap gains, rising 16.0%, while several other large technology names posted modest advances.
  • Mid- and small-cap groups experienced wide swings, with several companies moving on earnings surprises - both positive and negative.
  • Sectors affected include semiconductors and broader technology supply chains, as well as retail and small-cap financial or specialty issuers.

Thursday's trading session delivered broad volatility, with individual stocks moving sharply across market-cap categories. Some semiconductor and technology-related names rose, while a number of other companies, particularly in retail and small caps, saw pronounced declines tied to earnings and company announcements.

Below is a breakdown of the most significant movers by market-cap bucket, with percentages reflecting the intraday changes reported for the session.


Mega-Cap Movers (Market Cap $200B+)

  • SanDisk Corp-Exch (SNDK) +16.0%
  • Lam Research Corp (LRCX) +5.38%
  • Intel Corp (INTC) +4.61%
  • Arm (ARM) +4.03%
  • Palantir Technologies Inc (PLTR) +3.15%
  • Alibaba-exch (BABA) -2.68%

Large-Cap Stock Movers (Market Cap $10B-$200B)

  • Bending Spoons S p a (BSP) tops Q2 estimates, shares edge lower; -19.05%
  • Coach (TPR) -15.82%
  • Cerebras Systems Inc (CBRS) -12.98%
  • Western Digital (WDC) +7.91%
  • Super Micro Compu (SMCI) +5.88%
  • Hut 8 Mining PK (HUT) -6.94%

Mid-Cap Stock Movers (Market Cap $2B-$10B)

  • Liftoff Mobile Inc (LFTO) -19.6%
  • Resideo Tech (REZI) -17.4%
  • BBB Foods (TBBB) +16.45%
  • MUU (MUU) +13.25%
  • McGraw Hill Inc (MH) McGraw Hill shares up over 3% on better-than-expected Q1 print; +13.06%
  • StubHub Inc (STUB) StubHub tumbles 15% on second quarter earnings miss; -13.41%
  • Delek Logistics Partners LP (DKL) -12.97%

Small-Cap Stock Movers (Market Cap $300M-$2B)

  • Omeros Corp (OMER) Omeros surges 13% on strong earnings and revenue beat; +23.92%
  • TMS International Corp (TMS) +20.78%
  • ERock (EROC) +20.91%
  • Southport Acquisition (ANGX) +15.63%
  • PlasmaTech Biopharmaceuticals (ABEO) -14.36%
  • Wowo Ltd (CD) -19.61%
  • Cantor Equity Partners II Inc (SECZ) Securitize shares tumble 20% on wider quarterly loss; -23.41%

Market context and drivers

Thursday's roster of movers reflects a mix of earnings-related volatility and sector-specific momentum. Gains among semiconductor suppliers and other technology-related names contrasted with sharp drops for companies reporting weaker-than-expected results or wider losses. Several mid- and small-cap firms moved on company-specific earnings announcements, while larger-cap names produced notable but generally smaller percentage shifts.

What's notable

  • SanDisk led the mega-cap advances with a double-digit rise, supported by the group's overall positive performance.
  • Certain companies recorded outsized single-day declines following earnings misses or wider losses, driving pronounced volatility in the mid- and small-cap cohorts.
  • A mix of hardware and software-related names featured among winners, indicating selective strength within technology and industrial supply chains.

These highlights capture prominent movers across market-cap segments for the session. The list is not exhaustive but reflects the largest reported percentage changes for the day.

Risks

  • Earnings surprises produced sharp declines for some issuers (for example, Bending Spoons -19.05%, StubHub -13.41%, SECZ -23.41%), indicating that company-specific results can drive substantial short-term stock volatility - this primarily impacts mid- and small-cap stocks.
  • Wider quarterly losses at certain firms contributed to steep selloffs, highlighting uncertainty in firms with weaker profitability metrics - sectors affected include digital platforms and specialized financial issuers.
  • Large percentage moves in smaller market-cap names (both up and down) indicate liquidity and headline sensitivity risks for investors in small-cap and micro-cap segments.

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