Top US Stock Losers on Oct 12, 2026

Top US Stock Losers · Oct 12 · 30

Mon, Oct 12, 2026 · Close

Screen: share price of at least $5, market cap of roughly $2 billion or more, and a decline of more than 2.5% on the day; the 30 largest moves are shown. Turnover is estimated as volume × last price. Source: Yahoo Finance.

Cerebras Systems

USCBRSNear 52-wk low

146.62 -10.69%

Change: -17.55
Turnover (est.): $2.63B
Market cap: $34.83B
52-wk high: 386.34
52-wk low: 145.76

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Semtech

USSMTC

168.28 -10.15%

Change: -19.02
Turnover (est.): $939.8M
Market cap: $15.70B
52-wk high: 201.99
52-wk low: 60.28

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Ciena

USCIEN

404.89 -9.98%

Change: -44.88
Turnover (est.): $1.23B
Market cap: $57.42B
52-wk high: 637.51
52-wk low: 159.01

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Fastly

USFSLY

26.43 -9.80%

Change: -2.87
Turnover (est.): $179.5M
Market cap: $4.21B
52-wk high: 34.82
52-wk low: 7.74

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Lumentum

USLITE

995.41 -9.78%

Change: -107.95
Turnover (est.): $6.24B
Market cap: $90.17B
52-wk high: 1143.00
52-wk low: 152.54

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AXT

USAXTI

61.98 -9.47%

Change: -6.48
Turnover (est.): $579.0M
Market cap: $4.06B
52-wk high: 143.16
52-wk low: 4.35

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Ichor

USICHR

54.38 -9.23%

Change: -5.53
Turnover (est.): $38.9M
Market cap: $2.04B
52-wk high: 113.58
52-wk low: 14.06

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IonQ

USIONQ

36.27 -9.07%

Change: -3.62
Turnover (est.): $1.06B
Market cap: $14.69B
52-wk high: 84.64
52-wk low: 25.89

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TTM

USTTMI

110.33 -8.83%

Change: -10.68
Turnover (est.): $589.5M
Market cap: $11.62B
52-wk high: 223.83
52-wk low: 53.36

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National Energy Svcs Reunited

USNESR

20.90 -8.25%

Change: -1.88
Turnover (est.): $84.0M
Market cap: $2.11B
52-wk high: 36.94
52-wk low: 10.01

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Applied Optoelectronics

USAAOI

100.68 -8.17%

Change: -8.96
Turnover (est.): $1.06B
Market cap: $8.55B
52-wk high: 233.67
52-wk low: 18.50

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Viavi

USVIAV

41.75 -8.16%

Change: -3.71
Turnover (est.): $214.6M
Market cap: $10.27B
52-wk high: 60.43
52-wk low: 12.43

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Coherent

USCOHR

288.02 -7.87%

Change: -24.60
Turnover (est.): $1.90B
Market cap: $56.72B
52-wk high: 440.00
52-wk low: 108.19

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Aehr Test Systems

USAEHR

78.18 -7.63%

Change: -6.46
Turnover (est.): $185.0M
Market cap: $2.55B
52-wk high: 147.40
52-wk low: 18.70

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Varonis Systems

USVRNS

46.37 -7.48%

Change: -3.75
Turnover (est.): $80.3M
Market cap: $5.33B
52-wk high: 63.80
52-wk low: 19.70

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MaxLinear

USMXL

88.99 -7.46%

Change: -7.17
Turnover (est.): $235.8M
Market cap: $8.07B
52-wk high: 128.30
52-wk low: 12.77

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Ultra Clean

USUCTT

63.51 -7.41%

Change: -5.08
Turnover (est.): $82.0M
Market cap: $2.85B
52-wk high: 144.22
52-wk low: 21.49

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Forgent Power

USFPS

37.09 -7.34%

Change: -2.94
Turnover (est.): $197.2M
Market cap: $11.83B
52-wk high: 66.00
52-wk low: 25.95

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Navitas Semiconductor

USNVTS

9.99 -7.33%

Change: -0.79
Turnover (est.): $174.2M
Market cap: $2.62B
52-wk high: 34.17
52-wk low: 6.85

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Credo

USCRDO

200.84 -7.25%

Change: -15.71
Turnover (est.): $1.62B
Market cap: $37.75B
52-wk high: 308.67
52-wk low: 86.48

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Onto Innovation

USONTO

273.35 -7.19%

Change: -21.18
Turnover (est.): $240.7M
Market cap: $13.41B
52-wk high: 386.46
52-wk low: 118.97

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MACOM

USMTSI

306.36 -7.18%

Change: -23.70
Turnover (est.): $471.9M
Market cap: $23.40B
52-wk high: 418.90
52-wk low: 124.74

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DPC

USDPCNear 52-wk low

35.96 -7.15%

Change: -2.77
Turnover (est.): $31.7M
Market cap: $5.37B
52-wk high: 57.25
52-wk low: 35.90

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Oklo

USOKLONear 52-wk low

32.22 -7.15%

Change: -2.48
Turnover (est.): $277.1M
Market cap: $5.99B
52-wk high: 193.84
52-wk low: 32.19

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Planet Labs PBC

USPL

15.96 -7.10%

Change: -1.22
Turnover (est.): $124.0M
Market cap: $5.81B
52-wk high: 51.76
52-wk low: 10.52

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Bausch + Lomb

USBLCO

16.08 -7.05%

Change: -1.22
Turnover (est.): $45.5M
Market cap: $5.74B
52-wk high: 18.91
52-wk low: 14.39

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NuScale Power

USSMR

6.70 -7.01%

Change: -0.505
Turnover (est.): $257.4M
Market cap: $2.75B
52-wk high: 57.42
52-wk low: 6.61

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SiTime

USSITM

570.07 -6.91%

Change: -42.30
Turnover (est.): $251.5M
Market cap: $17.14B
52-wk high: 901.81
52-wk low: 243.68

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10x Genomics

USTXG

75.19 -6.77%

Change: -5.46
Turnover (est.): $304.5M
Market cap: $9.80B
52-wk high: 102.81
52-wk low: 11.16

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FormFactor

USFORM

130.28 -6.72%

Change: -9.39
Turnover (est.): $157.0M
Market cap: $10.16B
52-wk high: 160.27
52-wk low: 38.12

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This page organizes public market data. It is not a recommendation list or investment advice. Quotes may be delayed or contain errors; rely on the exchange and your broker for official data.