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Market movers › Oct 21, 2026

Why stocks rose and fell on Oct 21, 2026

33 stocks with notable moves: companies over $10B that moved more than 5%, plus the sharpest moves among smaller companies. For each — the day's headlines with a link to the source; if there was no news, the page says so. The strongest sector was Technology (+1.65%), the weakest Consumer Defensive (−1.09%).

Gainers · 26

ASST+13.6%Strive
ABSI+10.7%Absci

No news on Absci today. The Healthcare sector moved −0.22% (median).

NTSK+10.0%Netskope

No news on Netskope today. Its industry peers (Software - Infrastructure) that day: “AI data-center peer rally on power demand lifts NUAI 18% in regular hours”.

INOD+10.0%Innodata
SMCI+9.5%Super Micro
  • Market pulseSuper Micro Computer issues preliminary Q1 FY27 outlook with revenue $18.5–$19.5B and gross margin 12.0%–12.5% on strong AI demand
  • Market pulseSuper Micro Computer issues preliminary Q1 FY27 outlook with revenue $18.5–$19.5B and gross margin 12.0%–12.5%
  • Business WireSupermicro Provides First Quarter of Fiscal Year 2027 Preliminary Business Update
CRL+9.3%Charles River Laboratories International
MSTR+7.5%MicroStrategy
BE+7.1%Bloom Energy
TTMI+7.0%TTM Technologies

No news on TTM Technologies today. The Technology sector moved +1.65% (median).

MDB+6.7%MongoDB

No news on MongoDB today. Its industry peers (Software - Infrastructure) that day: “AI data-center peer rally on power demand lifts NUAI 18% in regular hours”.

DDOG+6.5%Datadog
MEDP+6.4%Medpace
  • Market pulseMedpace Holdings Inc reports Q3 2026 revenue $716.0M (+9% YoY), beating estimates
  • Market pulseMedpace posts Q3 2026 GAAP EPS $4.84 and revenue $716.0M (+9% YoY) beating estimates, issues 2026 guidance and $1.0B buyback through 2028
  • Business WireMedpace Holdings, Inc. Reports Third Quarter 2026 Results
ICLR+6.3%Icon
  • Market pulseThermo Fisher and Danaher earnings lift ICON 7% as CRO peers rally
CRDO+6.3%Credo Technology
  • Market pulseSupermicro’s AI-demand revenue preannouncement lifts Credo 8% after hours alongside infrastructure peers
  • Market pulseSupermicro’s AI-demand beat lifts Credo 8.9% amid a broad global chip rebound
AMX+6.1%America Movil SAB de CVearnings

The trigger was the quarterly report: EPS +7% year over year, 5.2% below the estimate.

CIEN+5.7%CIENA

No news on CIENA today. Its industry peers (Communication Equipment) that day: “Super Micro Computer blowout preliminary quarterly revenue spotlights AI server peer Hewlett Packard Enterprise”.

ILMN+5.6%Illumina
  • Market pulseIllumina launches three new AI-driven early-access tools expanding BioInsight Platform for large-scale genomic analysis and discovery
  • PR NewswireIllumina To Webcast Upcoming Investor Conference
  • PR NewswireIllumina BioInsight Platform expands with new software to accelerate the path from sequencing to discovery
RKLB+5.4%Rocket Lab
ROIV+5.4%Roivant Sciences
DELL+5.3%Dell
CRWD+5.3%CrowdStrike
SYM+5.1%Symbotic

No news on Symbotic today. Its industry peers (Specialty Industrial Machinery) that day: “AI power-bottleneck warnings lift Standex 3.1% with electrical-equipment peers by midday”.

Decliners · 7

RCUS−19.6%Arcus Biosciences
LAD−10.1%Lithia Motorsearnings
  • Market pulseLithia Motors posts record Q3 revenue $9.9B (+3% YoY) with non-GAAP EPS $10.34 (+9% YoY), beating EPS and revenue estimates
  • Market pulseLithia Motors beats Q3 estimates with record $9.9B revenue, EPS up 9% as used GPUs and DFC offset new-vehicle softness
  • GlobeNewswireLithia & Driveway (LAD) Reports Third Quarter Results, Achieves 54% Increase in Diluted Earnings Per Share, 9% Increase in Adjusted Diluted Earnings Per Share, and Raises Quarterly Dividend 7%

The trigger was the quarterly report: EPS +9% year over year, 6.6% above the estimate.

T−6.4%AT&Tearnings
  • Market pulseAT&T beats Q3 2026 estimates, raises full-year EPS outlook to about $2.40 as net leverage climbs to 3.13x
  • Market pulseAT&T beats Q3 2026 estimates, raises EPS outlook to about $2.40, records $2.6B non-cash impairment on held-for-sale AT&T Mexico unit
  • BenzingaAT&T, SpaceX And 3 Stocks To Watch Heading Into Wednesday

The trigger was the quarterly report: EPS +20% year over year, 8.1% above the estimate.

DXCM−6.4%Dexcom
NFLX−5.3%Netflixearnings

The trigger was the quarterly report: EPS +48% year over year, 6.0% above the estimate.

CMG−5.2%Chipotle Mexican Grill
  • Market pulseTD Cowen downgrades Chipotle to Hold from Buy, cuts price target to $32 on softer sales outlook
  • Market pulseTD Cowen downgrades Chipotle to Hold as Deutsche Bank cuts price target to $45 ahead of Q3 earnings
  • Earnings WhispersChipotle's Turnaround Faces A Cyclospora Test As Shares Sink Toward Post-Earnings Lows

Headlines link to their sources. We do not copy article text.