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U.S. Tech Stocks - Biggest Losers Today

UPDATED May 20, 2026

Explore the U.S. (NYSE and NASDAQ) Biggest Losers Today. These Tech Stocks have seen the largest drop in Market Cap from the previous trading day.

195 companies
CompanyLast Price1D Return1Y ReturnMarket CapAnalysts TargetValuationGrowthDiv Yield
CSCO
US$114.35-0.9%80.9%US$454.8bUS$124.4537.713.7%1.5%
LITE
US$868.07-2.5%1,042.9%US$63.8bUS$1,104.68141.879.1%n/a
ANET
US$140.49-0.8%52.0%US$178.3bUS$188.2047.516.5%n/a
FN
US$662.21-2.3%191.8%US$24.3bUS$749.1156.423.3%n/a
AAOI
US$165.26-3.5%868.1%US$13.7bUS$151.3026.2148.1%n/a
MSI
US$395.92-0.7%-7.2%US$66.2bUS$506.5531.49.9%1.2%
KEYS
US$342.08-0.6%110.5%US$59.0bUS$371.4659.813.0%n/a
NTAP
US$118.97-1.3%19.5%US$23.8bUS$117.6019.48.0%1.7%
VIAV
US$48.10-2.4%428.0%US$11.5bUS$64.438.2114.5%n/a
ZBRA
US$243.47-1.5%-15.4%US$11.8bUS$328.8827.718.4%n/a
CALX
US$38.37-3.7%-18.4%US$2.5bUS$66.0072.248.0%n/a
MIR
US$18.04-1.8%0%US$4.6bUS$27.90175.864.4%n/a
FFIV
US$382.42-0.3%33.6%US$21.6bUS$361.9030.512.7%n/a
BMI
US$118.06-0.9%-51.6%US$3.5bUS$147.0026.49.9%1.4%
NTCT
US$38.73-0.7%66.1%US$2.8bUS$41.7129.08.3%n/a
SHMD
US$6.98-4.1%144.9%US$404.8mn/a5.5n/an/a
BGIN
US$3.57-3.5%n/aUS$418.6mn/a6.0n/an/a
LPTH
US$13.65-1.7%485.8%US$801.0mUS$15.9812.5122.6%n/a
RBBN
US$2.61-1.9%-27.7%US$468.5mUS$3.6014.7-82.9%n/a
INSG
US$12.16-3.9%43.1%US$206.1mUS$21.2519.314.0%n/a
ADTN
US$14.47-0.7%80.0%US$1.2bUS$19.501.0102.6%0%
EXTR
US$23.48-0.3%47.7%US$3.1bUS$26.06188.727.1%n/a
ZEPP
US$8.81-4.4%236.3%US$135.2mUS$56.280.655.9%n/a
SILC
US$41.61-2.3%187.8%US$242.9mn/a3.619.7%0%
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