Monday's biggest stock movers: Digital Turbine, Astera Labs surge while Super Micro and Ulta slide

Biggest movers · At the close Jun 29, 4:10pm ET

Gainers

APPSDigital Turbine$12.78+15.4%
ALABAstera Labs$447.62+14.3%
LCIDLucid$6.58+11.1%
AAOIApplied Optoelectronics$149.38+10.1%
AXONAxon Enterprise$508.4+9.4%

Losers

SMCISuper Micro Computer$28.71-6.3%
ULTAUlta Beauty$462.55-5.3%
DUOLDuolingo$117.18-3.5%
ACHRArcher Aviation$4.7-3.5%
CIFRCipher Mining$25.05-3.4%

Digital Turbine and Astera Labs surged 15% and 14% respectively at Monday's close, while Super Micro Computer and Ulta Beauty skidded lower in a split session.

Continue ReadingShow less

Monday's session ended with sharp moves on both ends of the ledger. Digital Turbine (APPS) led all gainers with a 15% jump to $12.78, followed closely by Astera Labs (ALAB), which climbed 14% to $447.62. Lucid (LCID) added 11% to $6.58, Applied Optoelectronics (AAOI) rose 10% to $149.38, and Axon Enterprise (AXON) gained more than 9% to close at $508.40.

On the losing side, Super Micro Computer (SMCI) was the hardest hit, falling more than 6% to $28.71. Ulta Beauty (ULTA) shed 5% to $462.55, while Duolingo (DUOL) dropped 3.5% to $117.18. Archer Aviation (ACHR) and Cipher Mining (CIFR) each fell roughly 3.5%, closing at $4.70 and $25.05 respectively.

Disclosure

*$149 for two years (or $1.43 per week) is an introductory promotion for new members only. 62% discount based on the current list price of Stock Advisor of $199/year. Membership will renew at the then-current list price at the end of the membership term. Stock Advisor returns are 930% as compared to the S&P 500 returns of 185% as of April 7, 2026.

The same investor newsletter that told subscribers to buy Amazon in 2002, Netflix in 2004, and Nvidia in 2005 still publishes two new stock picks every month. Over 23 years, Motley Fool's Stock Advisor has more than quadrupled the S&P 500. New members get this month's picks, the Top 10 Rankings, and a 30-day money-back guarantee. Click here to unlock their next top stocks while new members are still being accepted.

The breadth of the session's movers — spanning semiconductors, EVs, retail, and software — underscored a market where individual stock catalysts, rather than broad macro themes, drove the day's most dramatic price action.

Sources

Mentioned: AXON, SMCI, DUOL, ULTA, ALAB, LCID, ACHR, CIFR, APPS, AAOI

Related Market Updates

ULTA Ulta Beauty

Q2 2027

Aug 27, 4:07pm ET

EPS

$6.55

est $6.21 +5.5%

Revenue

$3.04B

est $2.98B +1.8%

Ulta Beauty raised its full-year EPS guidance to $28.70 to $29.00 and lifted the fiscal 2026 buyback plan to $1.8 billion from $1.5 billion, a signal that comparable sales growth of 3.8% is holding in a crowded beauty market. Management also nudged up its sales and operating income outlook after the second-quarter beat.

Biggest movers · At the close Aug 26, 4:10pm ET

Gainers

ANETArista Networks$202.78+6.2%
RBRKRubrik$96.68+4.3%
ARMArm$251.53+4.1%
DELLDell Technologies$467.63+3.6%
HPEHewlett Packard Enterprise$55.28+3.4%

Losers

SNAPSnap$5.45-8.0%
HIMSHims & Hers$29.63-6.7%
LCIDLucid$4.92-6.6%
FUBOfuboTV$10.26-6.3%
IRENIren$39.74-5.8%

Arista Networks closed up 6.2%, the best move in a 111-stock priority list where hardware names took the top four gainer slots. Snap fell 8% to $5.45, the day's steepest decline.

Biggest movers · At the close Aug 25, 4:10pm ET

Gainers

SMCISuper Micro Computer$38.4+9.2%
FUTUFutu Holdings$126.21+9.0%
SMRNuScale Power$9.78+8.1%
MARAMarathon Digital$11.97+7.1%
SNAPSnap$5.92+7.0%

Losers

RBRKRubrik$91.58-6.6%
ZSZscaler$167.65-4.8%
AIC3.ai$9.74-3.7%
ASANAsana$9.43-3.4%
DOCUDocuSign$60.52-3.3%

Super Micro Computer closed 9.17% higher at $38.40, the biggest gain across our 111-stock priority list Monday. Hardware, nuclear and crypto names filled out the top five while software took the damage, Rubrik down 6.59%. Watch whether that split survives the open.

Biggest movers · At the close Aug 24, 4:10pm ET

Gainers

AMCAMC Entertainment$2.71+6.1%
EXPEExpedia$337.61+5.0%
SNAPSnap$5.47+4.3%
BROSDutch Bros$51.84+4.0%
ULTAUlta Beauty$540.82+3.7%

Losers

AAOIApplied Optoelectronics$110.34-11.6%
HIMSHims & Hers$30.91-8.5%
TEMTempus AI$66.83-8.1%
IONQIonQ$41.45-7.6%
SNDKSanDisk$1,491.74-6.5%

The damage at Monday's close ran deeper than the gains: Applied Optoelectronics shed 11.6% while the best performer, AMC Entertainment, managed 6.08%. Four of the five worst names lost more than 7% in a single session.

Biggest movers · At the close Aug 21, 4:10pm ET

Gainers

FUTUFutu Holdings$123.72+9.8%
TEMTempus AI$72.55+8.8%
IONQIonQ$45.16+8.7%
RIVNRivian$17.11+6.8%
HIMSHims & Hers$33.74+5.9%

Losers

CIFRCipher Mining$15.76-8.4%
AAOIApplied Optoelectronics$124.48-3.6%
FUBOfuboTV$10.25-3.2%
ARMArm$243.16-3.0%
IRENIren$41.32-3.0%

Futu Holdings closed up 9.75%, the biggest move in a 110-stock priority list where five names finished higher by 5% or more. The downside was far tamer: only Cipher Mining lost more than 4%.

Biggest movers · At the close Aug 20, 4:10pm ET

Gainers

MARAMarathon Digital$10.94+13.4%
TEMTempus AI$66.48+8.5%
AAOIApplied Optoelectronics$129.38+5.9%
FUBOfuboTV$10.79+4.4%
CIFRCipher Mining$16.58+4.3%

Losers

WMTWalmart$103.1-9.8%
IQiQIYI$1.04-8.0%
ACHRArcher Aviation$6.04-6.4%
UPSTUpstart$28.82-5.8%
IONQIonQ$41.39-4.5%

A near 10% single-day drop in a mega-cap retailer like Walmart, closing at $103.10, is the kind of move that rarely shows up on a leaderboard next to small caps. Marathon Digital ran the other way, up 13.37%, with Cipher Mining also in the green.

Biggest movers · At the close Aug 18, 4:10pm ET

Gainers

DUOLDuolingo$140.9+8.3%
SPOTSpotify$520.71+5.7%
ULTAUlta Beauty$519.44+5.3%
VERXVertex$13.06+4.7%
ASANAsana$9.24+4.6%

Losers

FNFabrinet$477.37-20.3%
CIFRCipher Mining$15.97-13.7%
AAOIApplied Optoelectronics$134.59-13.1%
BIDUBaidu$90.62-13.0%
COHRCoherent$309.03-12.0%

Fabrinet closed down 20% at $477.37, the deepest single-day loss in a 110-name priority list, with optical peers Applied Optoelectronics and Coherent also off double digits. Duolingo led all gainers at 8.3%.

ULTA Ulta Beauty

Regular session

Aug 18, 12:40pm ET

$522.41

+5.17% open $496.75

A 5.2% intraday run to $522 adds better than a billion dollars of market value to a $22.5B beauty retailer in a single session, a rare one-day move for this name. Whether it holds into the close is the thing to watch.

AI Portfolio · Eric Bleeker

AAOI

Aug 16, 8:00pm ET

1-year hold +592.70%since recommended · 367 days

One year in Eric Bleeker's AI Portfolio, and a $10,000 stake in Applied Optoelectronics at the $22.36 recommendation price is worth roughly $69,000 today. The optical transceiver buildout for AI data centers did the heavy lifting, and the position has kept making new ground as recently as this month.

Biggest movers · At the close Aug 14, 4:10pm ET

Gainers

AAOIApplied Optoelectronics$150.13+15.4%
FUBOfuboTV$10.46+6.7%
SNDKSanDisk$1,627.62+6.5%
CIFRCipher Mining$17.69+6.4%
AMDAMD$508.57+5.3%

Losers

DUOLDuolingo$134.39-6.7%
ASANAsana$9.21-6.7%
SMRNuScale Power$9.27-5.9%
ACHRArcher Aviation$6.56-5.9%
AMCAMC Entertainment$2.51-4.8%

Applied Optoelectronics closed out the week up 15.4% at $150.13, nearly triple the next best move on the board. Chip and storage names filled in behind it, while Duolingo and Asana ended the week lower.

AAOI Applied Optoelectronics

Regular session

Aug 14, 10:40am ET

$148.13

+13.61% open $130.39

A 13.6% intraday jump to $148.13 puts Applied Optoelectronics near a $12.8 billion valuation in a single session. Moves this size rarely settle quietly, so keep an eye on the stock into the close.

Portfolio concentration Gavin Baker Atreides Management

Aug 14

49.6% in the top 5 names · 46 long positions disclosed

SPACE EXPLORATION TECHN CORP
32.6%
MUMICRON TECHNOLOGY INC
5.7%
CEREBRAS SYSTEMS INC
4.8%
ALABASTERA LABS INC
4.1%
CIENCIENA CORP
2.4%

As of Jun 30, 2026 · disclosed Aug 14, 2026 · ~45 days stale — long positions only.

Gavin Baker's Atreides Management had nearly half its disclosed long book in five names as of June 30, with a third of it in one private company, SpaceX. The rest is a straight AI infrastructure bet: Micron memory, Cerebras chips, Astera Labs connectivity and Ciena optics.