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NASDAQ · ALGMTechnologySemiconductors

Allegro MicroSystems, Inc. Common Stock (ALGM)

$31.25−7.16%
Close Nov 4, 2026 · split-adjusted
Nov 4, 2026$31.25▲ 13.88% in range
Nov 4, 2025Low $22.80 · High $69.62Nov 4, 2026
What changed · written from our data
As of Nov 4, 2026

Allegro MicroSystems closed at $31.25 on Nov 4, down 7.16%, 55.1% below its 52-week closing high. Volume of 3.4M shares was 0.98× its 20-day average (close to normal).

Split-adjusted performance: -19.4% over one month, -39.2% over six months, +8.0% over one year.

In the quarter ended Sep 25, 2026, revenue was $276.88M, up 29.2% from a year earlier, with a net margin of 8.4%.

Short interest was 10.4M shares at the Oct 15 settlement, down 8.6% from the prior report (8.3% of float, 3.4 days to cover).

Market cap$5.83B186.5M shares
Revenue · quarter$276.9M+29.2% YoY
Diluted EPS$0.12+300.0% YoY
P/E · TTM188.4×P/S 5.8×
Net margin8.4%Gross 49.2%
Dividend yieldNone
52-week range22.80 – 69.62−55.1% from high
Volume3.4M0.98× 20-day avg
Volatility · 60d60.6%Annualised
Short % of float8.3%3.4 days to cover
Net cash-$94.1MCash $193.0M
Next earnings—Not scheduled
Split-adjusted performance
1W −11.6%1M −19.4%3M −26.4%6M −39.2%YTD +18.5%1Y +8.0%3Y +18.2%5Y −4.4%

Earnings reactions

History →

No reported quarters with price history yet.

Rank within Semiconductors

Percentile among 83 companies (100 = best)

6-month momentum40
Revenue growth54
Net margin52
Value (low P/E)9
Size63

Industry medians: 6-month return −31.2%, revenue growth +24.6%, net margin 8.1%, P/E 46.8×.

Short interest

Details →
Shares short10.4M−8.6% vs prior
Days to cover3.4Settled Oct 15
% of float8.3%
Short vol. 10d27.0%of daily volume

Closest peers by size in Semiconductors

CompanyPriceToday6MRev. growthNet marginP/EMkt cap
ALGMAllegro MicroSystems$31.25−7.16%−39.2%+29.2%8.4%188.4$5.83B
CRUSCirrus Logic$115.99+3.27%−30.8%+12.9%16.7%13.5$5.81BCompare
MXLMaxLinear$56.85−11.13%−30.0%+72.4%13.3%—$5.16BCompare
FORMFormFactor$85.24−11.93%−42.8%+31.9%21.8%57.7$6.66BCompare
AAOIApplied Optoelectronics$59.27−7.35%−66.8%+86.4%−11.9%—$5.03BCompare
VIAVViavi Solutions$29.38−2.23%−44.6%+52.5%7.4%—$7.23BCompare
SYNASynaptics$117.49+0.07%+9.5%+8.9%−145.3%—$4.66BCompare
SLABSilicon Laboratories$222.00−0.15%+2.5%+18.3%−4.6%—$7.41BCompare
MRCYMercury Systems$71.76−10.66%−21.7%+6.1%0.3%—$4.37BCompare

News about Allegro MicroSystems

All news →
Allegro MicroSystems Introduces New Power and Cooling Solutions for Sustainable 800V AI Data CentersGlobeNewswire Inc. · Oct 27, 2026▲ PositiveStrength Seen in Allegro MicroSystems (ALGM): Can Its 8.7% Jump Turn into More Strength?Zacks Investment Research · Oct 5, 2026▲ PositiveAllegro MicroSystems Appoints Brian White to its Board of DirectorsGlobeNewswire Inc. · Jun 18, 2026▲ PositiveAllegro MicroSystems to Present at TD Cowen’s 54th Annual Technology, Media & Telecom Conference on Wednesday, May 27, 2026GlobeNewswire Inc. · May 13, 2026▲ PositiveAllegro MicroSystems to Announce Fourth Quarter and Fiscal Year 2026 Financial ResultsGlobeNewswire Inc. · Apr 16, 2026Neutral

Quick answers

What does Allegro MicroSystems do?
Allegro Microsystems Inc is a designer, developer, fabless manufacturer, and marketer of sensor ICs and application-specific analog power ICs for automotive and industrial markets. Its Sensor IC allows customers to precisely measure motion, speed, position, and current, and Power ICs include high-temperature and high-voltage capable motor drivers, power management, and LED driver ICs.
What is ALGM's market cap?
$5.83B, based on the Nov 4 close of $31.25.
What is ALGM's P/E ratio?
188.4× trailing-twelve-month earnings of $30.94M.
Does Allegro MicroSystems pay a dividend?
No regular cash dividend has been paid in the last year.
How much of ALGM is sold short?
10.4M shares, 8.3% of float, as of Oct 15, 2026.
What sector is ALGM in?
Technology, in the Semiconductors industry.

About Allegro MicroSystems

Allegro Microsystems Inc is a designer, developer, fabless manufacturer, and marketer of sensor ICs and application-specific analog power ICs for automotive and industrial markets. Its Sensor IC allows customers to precisely measure motion, speed, position, and current, and Power ICs include high-temperature and high-voltage capable motor drivers, power management, and LED driver ICs. Its products are divided into three categories: SENSE, which includes Current Sensors, Switches, and Latches, and Interface ICs among others; REGULATE, which includes Regulators, ClearPower Modules, and LED Drivers; and DRIVE, which includes BLDC Drivers, Brush DC, and others. Product-wise, the firm derives the majority of its revenue from sales of Magnetic sensors.

HQ: Manchester, NH4,250 employeesListed Oct 29, 2020allegromicro.com

Sources: Massive / Polygon daily aggregates (split-adjusted) · SEC filings via Massive · FINRA settlements via Massive · Financial Modeling Prep. Figures are dated where shown; research is informational, not investment advice. Methodology