Stock Markets June 23, 2026 10:32 AM

Tech and Storage Names Lead Tuesday Declines as Small-Cap Winners Stand Out

Major semiconductor and storage stocks drop sharply while select small- and mid-cap issues post double-digit gains and losses

By Marcus Reed
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SNDK MU LRCX AMAT TXN

Tuesday's trading session featured steep declines across several large technology and storage-related stocks, with SanDisk (SNDK) and Micron (MU) among the largest percentage losers. Larger-cap semiconductor equipment and chipmakers also fell in the range of roughly 6.7% to 9.1%. At the same time, a mix of mid- and small-cap companies produced both sizable advances and deep losses, including several stocks moving on company-specific developments such as guidance revisions and capital raises.

Tech and Storage Names Lead Tuesday Declines as Small-Cap Winners Stand Out
SNDK MU LRCX AMAT TXN
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Key Points

  • Major technology and data-storage names recorded steep percentage losses, with SanDisk (SNDK) down about 11% and several semiconductor-related stocks falling between roughly 6.7% and 9.1%.
  • Mid-cap moves included company-specific catalysts: Primoris Services fell after a KeyBanc downgrade tied to guidance cuts, and AMC declined following its plan to raise $200 million via a stock offering.
  • Small-cap action was mixed, featuring several double-digit gains (including Centricus Acquisition and Backblaze) alongside multiple deep losses.

Treasury and macro drivers are not identified in the available reporting, but market activity on Tuesday showed concentrated weakness among major technology and data-storage names and a disparate set of outcomes among smaller issuers. Several mega-cap technology and semiconductor stocks posted notable percentage declines, while the small- and mid-cap tiers produced both sharp gains and steep sell-offs tied to company-level announcements.

Mega-cap movers

  • SanDisk Corp-Exch (SNDK): -10.96%
  • Micron Tech (MU): -8.92%
  • Lam Research Corp (LRCX): -9.07%
  • Applied Matls Inc (AMAT): -7.97%
  • Texas Instru (TXN): -7.43%
  • Western Digital (WDC): -8.66%
  • Kla-tencor Corp (KLAC): -8.79%
  • Seagate technology (STX): -6.75%
  • Qualcomm Inc (QCOM): -7.55%
  • Arista Networks (ANET): -6.71%

The largest market-cap group on the list saw broad weakness, with percentage moves clustering in the mid-to-high single digits and beyond. Storage and semiconductor names are prominent among the declines.

Large-cap movers

  • Credo Technology Holding (CRDO): -10.43%
  • Corning Inc (GLW): -9.78%
  • GS Acquisition A (VRT): -8.84%
  • Tower Semiconductor (TSEM): -9.42%
  • Teradyne Inc (TER): -8.36%
  • FormFactor (FORM): -8.11%
  • Sunbelt Rentals Holdings (SUNB): -8.04%
  • Nanometrics Incor (ONTO): -7.86%
  • Vicor Corp (VICR): -5.4%
  • DRAM (DRAM): +12.5%

Within the $10 billion to $200 billion market-cap band, declines were common but not universal: DRAM stands out with a double-digit uptick.

Mid-cap movers

  • Primoris Services (PRIM): -27.96% - note that KeyBanc downgraded the stock following a guidance reduction, per the reporting.
  • Amc Entertat Hld (AMC): -23.55% - reported move tied to the company's plan to raise $200 million through a stock offering.
  • SNXX (SNXX): -22.71%
  • MUU (MUU): -17.39%
  • Fluence Energy (FLNC): -11.06% - reporting notes a 10 MWh energy storage system expansion by the company.
  • AXT Inc (AXTI): -10.19%
  • Camtek Ltd (CAMT): -10.33%
  • Churchill Capital (INFQ): +13.02%
  • Quantinuum (QNT): +15.1%
  • TSLL (TSLL): -8.73%

Mid-cap action included several company-specific catalysts referenced in the reporting: a rating downgrade tied to guidance for Primoris and a capital raise at AMC.

Small-cap movers

  • Centricus Acquisition (ARQQ): +28.62%
  • Backblaze (BLZE): +26.72%
  • SNDU (SNDU): -23.55%
  • MULL (MULL): -18.38%
  • AAOX (AAOX): -16.98%
  • MVLL (MVLL): -15.2%
  • Bull Horns (ZSQR): -14.68%
  • Rackspace Technology Inc (RXT): +6.95%
  • Edgewell Personal Care (EPC): +15.16%

Among smaller-cap listings, both sharp rallies and steep declines appeared, with several names moving by double digits in either direction.

Takeaways

  • Large technology and storage stocks dominated the downside among mega-cap names.
  • Mid- and small-cap groups showed idiosyncratic behavior, with company announcements such as guidance changes and planned equity raises cited for some moves.
  • Positive moves were concentrated among a small subset of mid- and small-cap stocks, while the majority of listed tickers recorded declines.

Reporting provided percentage moves and a few company-level notes but did not attribute these market swings to broader macro factors or offer additional explanatory detail. The session displayed a mix of sector concentration on the downside and isolated upside performers at the lower market-cap strata.


Risks

  • Company-specific events - such as guidance reductions and equity raises - can drive outsized moves in mid-cap stocks, impacting investor returns in sectors like construction/services and entertainment.
  • Concentrated declines among large technology and storage names increase sector-specific volatility for semiconductor and data-storage markets.
  • High dispersion in small-cap performance introduces elevated idiosyncratic risk for investors in lower market-cap segments.

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