Applied Optoelectronics PE ratio AAOI

Share price divided by earnings per share over the last twelve months, since 2015.

Today, Oct 23, 2026: n/m; losses over the last year
Last meaningful: 25.7×; Feb 2019
10-year median: 20.3×
10-year range: 6.6× to 83.3×
Peer median: 32.9×

Applied Optoelectronics has no meaningful PE ratio today: it lost $0.78 a share over the last twelve months, and a PE needs earnings.

It was last meaningful in Feb 2019, at 25.7×.

On the days it had one over the last ten years, its median was 20.3×, from 6.6× in Apr 2018 to 83.3× in Nov 2016.

PE ratio over time

median 20.3×

The dashed line is the 10-year median and the shaded band the middle half of its days.

Open the interactive chart, with overlays and comparisons

Year by year

Year	End of year	Low	High
2019	25.7×	25.1×	29.1×
2018	25.1×	6.6×	36.1×
2017	9.0×	8.9×	49.8×
2016	21.9×	15.0×	87.4×
2015	31.8×	30.7×	99.3×

Against its peers

Companies in Semiconductors nearest Applied Optoelectronics' size, closest first, today.

Company	PE ratio
AAOIApplied Optoelectronics	n/m
CRUSCirrus Logic	13.7×
FORMFormfactor	67.5×
ENPHEnphase Energy	31.9×
KLICKulicke & Soffa Industries	34.0×
DIODDiodes	43.8×
ACMRACM Research	24.0×
RMBSRambus	39.3×
AMKRAmkor Technology	17.6×
ACLSAxcelis Technologies	35.8×
PENGPenguin Solutions	22.0×
Peer median	32.9×

What the PE ratio tells you

Share price divided by earnings per share over the last twelve months. It is the price tag on a dollar of profit: 20× means you pay $20 for $1 of yearly earnings.

Blank while earnings are negative. A very low PE can mean the market expects profits to fall, so read it with growth and the company's own history.

More on Applied Optoelectronics

Valuation data, not investment advice. Prices as of Oct 23, 2026. Reported figures come from the company's filings with the SEC.