TOP TIERMARKET NEWSWIRE
Movers explained · September 28, 2026

Why Is ALLEGRO MICROSYSTEMS (ALGM) Stock Moving Today?

By the Top Tier Newswire AI Desk · August 18, 2026 at 3:44 PM ET · reviewed against 0 wire stories

ALLEGRO MICROSYSTEMS (ALGM) is drawing unusual attention today.

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Why ALGM stock is down today

Allegro MicroSystems (ALGM) fell 10.67% to $39.53 in afternoon trading on August 18. The stock opened with a 4.2% gap down from the prior close and continued to decline throughout the session. Despite a new Buy rating from Benchmark, the stock struggled amid mixed analyst price targets and recent insider selling.

What Happened

Benchmark initiated coverage on ALGM with a Buy rating and a $60 price target. This was one of several analyst actions in recent days, including Mizuho maintaining an Outperform rating with a $58 price target, Morgan Stanley raising its target to $52, and TD Cowen lowering its target to $48. Despite the positive analyst attention, the stock declined sharply. The session low of $39.47 was reached at 3:40 PM ET. Volume was 1.2 million shares, which is 0.4 times the 3-month daily average. The stock is currently trading near its 52-week low of $22.41.

What The Data Shows

The stock has had a volatile year, printing one fresh 52-week high and 23 fresh 52-week lows on August 18. Recent insider transactions include four sell filings totaling $805,000 in the last 90 days. The most recent sale occurred on August 12. The stock has a high beta of 1.94, indicating significant volatility relative to the market. It also trades at a high P/E of 554.9 and has a net margin of 1.5%.

What To Watch

Investors should monitor the stock for any follow-up analyst commentary or corporate developments. No earnings date is provided in the current data. Coverage breadth remains limited, with only one story from one source in the last 36 hours.

AI-assisted analysis composed exclusively from headlines and data on the Top Tier newswire. Public view is delayed 4 hours from real time. Not financial advice.

ALGM by the numbers

Mkt cap: $7.9BP/E: 554.952w: $22.41 to $71.77
ALGM · Aug 18 session (5-min) · -10.67% vs prior close · updated 3:44 PM ET
$39.25$41.89$44.53prev close $44.25$39.537:00 AM9:10 AM11:20 AM1:30 PM3:40 PM7:00 AM · $42.507:10 AM · $42.597:30 AM · $42.307:35 AM · $42.307:40 AM · $42.048:10 AM · $42.008:25 AM · $42.309:25 AM · $42.579:30 AM · $42.199:35 AM · $42.379:40 AM · $41.709:45 AM · $41.479:50 AM · $41.319:55 AM · $41.8110:00 AM · $41.5810:05 AM · $41.1710:10 AM · $40.9410:15 AM · $40.9410:20 AM · $40.8410:25 AM · $40.7910:30 AM · $40.6610:35 AM · $40.4510:40 AM · $40.3910:45 AM · $40.2710:50 AM · $40.1310:55 AM · $39.9711:00 AM · $40.0611:05 AM · $39.9411:10 AM · $39.9411:15 AM · $39.8611:20 AM · $40.0511:25 AM · $40.4011:30 AM · $40.2611:35 AM · $40.2011:40 AM · $40.2711:45 AM · $40.3311:50 AM · $40.3811:55 AM · $40.3012:00 PM · $40.2912:05 PM · $40.2212:10 PM · $40.1912:15 PM · $40.1112:20 PM · $40.1512:25 PM · $40.0912:30 PM · $40.1712:35 PM · $40.3612:40 PM · $40.4112:45 PM · $40.4712:50 PM · $40.4812:55 PM · $40.391:00 PM · $40.481:05 PM · $40.401:10 PM · $40.411:15 PM · $40.321:20 PM · $40.191:25 PM · $40.231:30 PM · $40.271:35 PM · $40.371:40 PM · $40.341:45 PM · $40.331:50 PM · $40.311:55 PM · $40.272:00 PM · $40.312:05 PM · $40.252:10 PM · $40.412:15 PM · $40.472:20 PM · $40.422:25 PM · $40.442:30 PM · $40.402:35 PM · $40.552:40 PM · $40.452:45 PM · $40.172:50 PM · $39.942:55 PM · $39.793:00 PM · $39.773:05 PM · $39.843:10 PM · $39.733:15 PM · $39.653:20 PM · $39.643:25 PM · $39.783:30 PM · $39.623:35 PM · $39.623:40 PM · $39.53

The headlines behind the move

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More on ALGM: full news and sentiment history. Sentiment scores are AI-derived research signals, not financial advice.

Earlier ALGM move explainers: 2026-08-18