Allegro MicroSystems, Inc ALGM

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Allegro MicroSystems, Inc. - Common Stock · Company · Nasdaq · Technology / Semiconductors

Paper trade (simulated — no real money)

Fill: USD 31.4800 · FX 1 USD = 1.277900 SGD · about SGD 40.2283 per unit

Sign in to practise with simulated trades before investing real money. USD fills are converted into the SGD portfolio at the displayed rate.

Announcement types: (default: consequential filings)
Results & current reports
Capital markets
Ownership & governance

USD closing-price chart (daily close from yfinance · Last year)

USD 30.48 → 31.48 · 3.3%
69.62046.21022.800 1 2 3 4 5 6 7 8 9 10 11,12 13 14 15 Oct 25Jan 26Apr 26Jul 26Oct 26

Numbered dotted lines mark the filtered filings under Announcement Events below.

Price & SEC Filing History 25 Oct 2025 — 26 Oct 2026 (Last year)

Daily Nasdaq prices are sourced from yfinance. Yellow highlighting marks an intraday rise or a gap up between adjacent trading sessions. SEC acceptance times are converted to US Eastern time: pre-market filings appear below that day’s OHLCV row; filings accepted after the 09:30 ET open appear above it. The SEC does not publish an exact first-public-availability timestamp, so acceptance time is the best available proxy.

No data yet
Weekend
Weekend
31.4200 31.8700 30.6250 31.4800 5,701,973
33.4200 33.5750 31.2400 31.6900 2,455,600
34.8500 35.2110 34.0800 34.5100 2,536,200
32.4600 34.3300 32.1200 33.9100 2,424,700
32.8800 33.6000 32.0600 33.1700 2,783,000
Weekend
Weekend
31.8000 32.9600 31.4300 31.6200 2,595,100
31.0750 32.5400 30.5100 32.3600 3,190,700
32.8800 33.4900 31.7200 32.2200 2,405,800
32.8000 33.7200 32.4130 33.6500 2,985,000
35.0000 35.0000 33.7000 33.7900 2,723,000
Weekend
Weekend
36.8300 36.8300 35.0700 35.5700 2,550,700
36.5600 37.0050 34.9460 36.2700 2,574,000
37.7000 37.9500 36.7900 37.0300 2,410,400
38.8950 39.2900 37.9800 38.7600 3,286,100
39.4400 39.7100 37.8490 38.4600 3,483,200
Weekend
Weekend
38.1500 40.0300 38.1500 39.5300 5,905,900
36.3500 36.8620 35.6800 36.3800 2,793,300
36.6400 37.0500 36.1500 36.3500 2,098,200
37.8600 38.0000 36.2100 36.6000 2,413,800
36.7400 37.4500 35.7400 36.9400 2,747,400
Weekend
Weekend
35.2750 36.8850 35.1250 36.7600 2,553,100
34.3200 35.1950 33.9500 35.1300 2,462,700
35.4800 35.9500 34.8500 35.1100 2,520,400
35.4300 36.3750 35.1300 35.5100 4,594,200
35.0100 35.8900 33.8500 35.5000 2,563,400
Weekend
Weekend
33.5700 34.1750 33.3200 34.1000 3,177,900
34.4400 34.5330 32.9950 33.1100 1,961,100
34.1200 34.3500 32.6700 33.0200 1,704,100
34.4200 34.4900 32.7800 33.2600 2,258,700
34.0300 35.1350 33.6000 33.8500 2,062,100
Weekend
Weekend
35.8600 36.8000 35.5600 36.3100 1,848,800
34.7230 35.8300 34.5460 35.2700 1,591,900
35.9900 36.8900 35.7600 35.8400 1,867,900
37.5400 37.6750 36.2500 36.4700 2,618,100
No trading
Weekend
Weekend
36.1800 37.2800 35.9750 36.6100 2,508,600
34.9000 35.7700 34.0200 35.5600 2,463,400
35.6700 36.4100 35.0250 35.4700 1,607,000
35.3900 35.7600 34.5000 35.4700 1,682,100
36.0000 36.5000 35.4100 36.2500 2,280,800
Weekend
Weekend
37.5100 37.5100 35.5600 35.7700 2,145,800
37.8000 38.2600 36.8450 37.5900 1,681,600
37.5100 38.1500 36.5000 36.8900 1,872,800
36.8300 37.4500 36.4350 37.4400 2,782,600
36.1500 36.5900 35.3400 35.6300 2,131,500
Weekend
Weekend
37.6250 37.9750 36.4900 37.1600 2,342,300
38.2100 38.7900 36.6100 37.1900 2,220,600
40.0000 40.3000 37.4900 38.3500 2,503,400
42.5400 43.0500 39.3350 39.3900 2,581,600
45.3200 46.5800 44.0250 44.2500 1,538,000
Weekend
Weekend
44.0600 45.0100 43.5300 44.3900 982,500
42.7800 45.6700 42.5900 44.1300 2,164,600
44.5700 44.5700 42.3600 42.4700 1,088,600
43.4700 44.0500 42.3100 42.5200 1,126,800
44.3900 44.8700 42.3700 42.4600 1,733,200
Weekend
Weekend
43.8000 44.5000 42.7200 43.7700 1,607,000
15 · 8-K Pre-market · 08:02 ET 8-K ↗
40.8400 44.0500 40.2000 42.4550 1,828,300
42.0200 43.5600 41.6100 41.8000 1,727,200
44.0000 44.4900 42.1900 42.8500 2,726,400
39.6900 42.0950 38.6000 41.5200 2,506,000
Weekend
Weekend
42.2700 43.3500 40.7550 41.5000 3,763,900
14 · 10-Q Pre-market · 08:57 ET 10-Q ↗
42.3100 42.9200 38.1500 41.4500 6,152,700
13 · 8-K Pre-market · 07:07 ET 8-K ↗
43.7000 44.9400 41.7700 42.2100 3,309,500
43.5000 44.7250 42.0050 44.5200 2,320,400
46.9600 47.6200 44.0100 46.8000 2,383,500
Weekend
Weekend
50.0000 50.0000 45.5650 46.0300 1,574,100
49.1200 51.8800 49.0200 50.0700 3,114,200
47.8400 50.6450 47.8400 49.8700 1,190,000
49.2500 49.9600 47.7000 49.3500 1,292,600
46.2900 48.5000 46.0000 46.3600 1,928,000
Weekend
Weekend
44.2800 48.0700 44.1300 46.4800 1,588,700
48.0000 48.8600 46.4600 47.1200 1,994,700
53.1000 53.3500 47.9600 50.0300 2,018,100
54.2100 54.4000 51.1900 52.3200 1,838,800
52.2100 52.6250 50.1550 50.8550 1,561,200
Weekend
Weekend
55.9900 56.0000 53.4840 54.8700 2,326,600
54.4000 58.4800 54.4000 57.3800 4,709,900
51.0600 52.5150 49.6050 51.4650 3,470,400
52.9700 53.7600 50.4700 51.5500 3,846,200
57.0700 62.0000 56.0000 56.5600 4,571,600
Weekend
Weekend
No trading
63.3800 63.7750 52.8800 55.4850 4,700,300
66.8450 67.9000 63.1600 63.2000 3,843,600
66.1000 71.7700 64.8010 69.6200 4,379,500
58.0200 67.4100 57.3000 66.3700 6,986,500
Weekend
Weekend
57.3440 60.3850 56.5000 57.8900 12,165,500
58.4100 60.8000 55.6500 60.1600 3,602,900
55.7300 56.7900 54.1800 55.4200 2,614,900
12 · DEFA14A Pre-market · 07:32 ET DEFA14A ↗ 11 · DEF 14A Pre-market · 07:27 ET DEF 14A ↗
56.8000 58.4600 55.4900 55.5200 3,406,700
61.6750 61.6750 58.1300 61.5800 3,464,000
Weekend
Weekend
No trading
57.2000 59.5550 56.2900 59.0000 4,705,500
10 · 8-K Pre-market · 08:09 ET 8-K ↗
55.4400 57.8800 53.2500 53.9800 4,039,700
54.9100 58.1300 53.2550 53.2900 3,534,600
52.8050 55.4500 52.5300 55.0000 2,663,100
Weekend
Weekend
47.9600 50.4600 47.4700 50.4050 1,621,400
45.8800 47.9800 45.4500 47.9600 1,424,800
45.6800 47.0500 44.0000 44.5400 1,598,800
49.2200 50.0000 43.2700 46.6300 1,811,000
47.8700 48.2400 46.4300 48.1900 2,070,500
Weekend
Weekend
51.5000 51.7500 46.1000 46.3900 2,137,400
51.0200 54.4000 50.0000 53.6200 2,090,800
50.3300 54.1000 49.0200 53.1100 2,881,800
48.6400 50.7400 48.4000 50.3300 2,339,300
47.2250 47.5900 46.0100 47.1300 2,144,100
Weekend
Weekend
51.2600 52.8000 47.3600 47.8700 3,650,300
49.5700 51.2250 47.7800 51.1000 2,035,500
51.5900 51.6600 48.7500 49.0000 1,994,600
47.8000 51.3500 47.1500 50.7600 3,012,100
No trading
Weekend
Weekend
45.3800 46.1500 45.1100 45.9500 1,943,900
43.7400 45.1400 43.6000 44.7000 1,786,200
9 · 10-K Pre-market · 08:24 ET 10-K ↗
42.2700 44.5700 41.2500 44.3300 2,462,200
40.1000 41.8400 39.5700 41.6500 2,005,300
42.8500 43.7500 40.6700 41.3500 2,378,300
Weekend
Weekend
43.5800 43.7850 42.3350 43.1000 3,526,100
46.0600 46.1350 44.8400 44.9700 1,988,600
8 · 8-K After-hours · 16:12 ET 8-K ↗
47.6600 47.7300 45.4350 45.9700 2,105,000
47.2600 47.6200 43.3750 45.8700 3,507,500
48.8700 49.0200 46.1500 48.3900 3,466,400
Weekend
Weekend
49.1700 49.1700 47.2600 48.9500 2,540,500
43.9000 49.4900 42.0000 47.9300 5,318,800
7 · 8-K Pre-market · 07:09 ET 8-K ↗
50.2500 51.4000 49.5400 51.3700 3,575,400
50.2500 50.3050 48.7300 49.6800 2,970,200
49.4250 50.1900 48.7400 49.4800 2,283,900
Weekend
Weekend
47.7100 49.1900 46.8170 48.9800 2,473,300
44.6400 48.6000 44.2150 48.5000 3,475,100
42.1900 44.4100 42.1900 44.0700 2,696,000
41.7700 42.9700 40.9700 41.1200 2,406,000
44.1300 44.5000 42.2770 43.4700 1,794,200
Weekend
Weekend
45.0550 45.0870 43.6500 44.1300 1,945,100
44.0700 45.3900 43.0400 43.6100 2,842,900
42.2900 42.6000 40.9350 42.2700 1,742,700
40.8500 42.0200 40.8400 41.2800 1,712,500
40.0500 40.6900 39.7500 40.6500 1,690,700
Weekend
Weekend
39.0200 40.6100 38.9000 40.0000 1,568,800
37.4400 38.3300 37.2000 38.2200 1,553,800
38.3750 38.4900 37.0000 37.2500 1,387,700
38.5400 38.7200 37.7700 38.2700 1,052,700
36.9200 38.6330 36.8200 38.0400 1,582,000
Weekend
Weekend
37.6600 38.7500 37.4400 37.5000 1,490,700
35.8000 37.0500 35.8000 37.0200 1,867,300
36.3300 36.7500 35.2200 35.8700 2,886,200
32.5600 33.4750 32.5600 33.2800 1,896,600
32.6600 33.5900 32.2800 32.8100 1,087,800
Weekend
Weekend
No trading
31.6800 33.8300 31.5900 32.6000 1,313,600
32.0400 34.0100 31.9800 33.3000 2,279,000
29.4200 31.6250 29.2500 31.5300 1,878,300
30.5000 30.6060 27.6500 28.0400 2,291,000
Weekend
Weekend
30.7600 31.2500 30.0800 30.1200 1,412,000
32.8480 32.8480 30.9700 31.2300 1,306,100
33.1100 33.3000 32.4800 32.6300 1,440,300
31.2700 33.3500 31.2300 32.5800 1,680,400
31.0000 31.9790 30.6700 31.7400 1,592,800
Weekend
Weekend
30.8800 31.0400 29.5600 29.9500 2,351,200
30.4500 31.3400 29.8000 30.9100 2,197,500
32.1400 32.7000 31.4100 31.5200 2,114,000
31.4300 32.8800 31.1400 32.0600 2,615,800
31.8300 32.1100 31.3450 31.3800 1,421,100
Weekend
Weekend
31.8600 32.1000 30.5900 31.1300 1,156,600
32.2600 32.5100 31.0900 31.1600 1,383,400
33.1100 33.3800 32.7200 33.0600 1,112,100
32.8500 34.1400 32.6300 33.1700 1,574,200
31.8200 32.8900 30.7800 32.8700 2,391,500
Weekend
Weekend
31.8100 32.8300 31.6200 31.9300 1,872,600
33.4200 34.5650 32.6000 32.7800 2,064,500
35.4300 35.4300 33.4800 34.0700 1,554,400
34.9600 35.5300 34.3200 34.7200 2,855,000
35.0000 37.0350 34.8000 36.5900 1,422,000
Weekend
Weekend
35.9100 36.6300 35.3500 36.4700 1,727,000
37.8900 38.2050 36.0100 36.7700 2,197,500
39.2000 39.2550 37.9200 38.1200 1,994,600
38.9100 39.6600 38.6600 39.0400 1,795,900
38.7900 39.7600 38.3000 38.4800 2,010,000
Weekend
Weekend
36.0600 39.1000 36.0600 38.9300 5,599,400
37.9700 38.3100 36.1400 36.2600 4,904,100
39.7500 40.2500 38.0200 38.5900 4,615,100
41.5600 42.2200 40.3750 41.6900 2,229,400
No trading
Weekend
Weekend
43.0400 43.5200 41.9650 42.3800 1,564,100
42.9000 43.8600 41.6300 41.8300 1,952,900
42.3100 43.0400 41.8000 42.8100 2,508,800
41.9900 42.2000 40.9400 41.6100 2,358,600
41.6900 42.1100 40.8270 41.9900 2,637,600
Weekend
Weekend
39.2200 41.7850 39.2100 41.5700 3,748,700
37.8800 38.8800 37.4220 38.6200 2,779,900
39.3290 40.8800 37.3000 38.2000 3,546,400
37.7300 39.5000 37.0000 38.8900 4,154,100
36.2000 38.2900 36.0200 37.4300 2,752,800
Weekend
Weekend
37.1400 38.6500 36.2400 36.9100 5,447,200
6 · 10-Q Pre-market · 09:17 ET 10-Q ↗
36.9600 39.8900 34.5500 37.9800 10,056,900
5 · 8-K Pre-market · 07:06 ET 8-K ↗
33.6800 35.3900 33.4850 34.5500 4,803,400
32.6300 32.9900 32.2600 32.6600 2,297,800
32.9900 32.9900 31.8600 32.4900 1,927,100
Weekend
Weekend
33.7100 33.7700 32.3700 32.9900 1,686,200
34.5500 34.7400 32.9710 33.8100 2,099,600
4 · 8-K After-hours · 16:42 ET 8-K ↗
33.5600 34.4400 33.1700 33.9900 2,151,400
32.3000 33.4700 32.0100 32.9700 3,016,200
No trading
Weekend
Weekend
33.0400 34.2900 32.9400 33.3500 2,604,400
3 · 8-K Pre-market · 08:04 ET 8-K ↗
32.9800 33.4800 32.2500 32.6900 4,187,500
30.5500 32.9750 30.5500 32.2500 3,442,200
30.5500 31.1200 30.3200 30.7800 1,388,800
30.9400 30.9400 29.8200 30.1700 1,354,700
Weekend
Weekend
31.5900 31.5900 30.8900 31.2900 1,117,000
30.5900 31.5000 29.7300 31.3000 1,594,400
30.9300 31.1300 29.6800 30.6400 1,821,200
28.7300 32.3800 28.7300 31.5300 4,066,700
27.6300 30.2900 27.5950 28.4500 2,405,000
Weekend
Weekend
27.0000 27.3590 26.1800 26.9100 2,150,600
No trading
26.9800 26.9800 26.2400 26.3800 927,400
26.5900 27.0100 26.5500 26.8300 1,063,100
26.6300 26.8500 26.3200 26.5300 854,100
Weekend
Weekend
27.0700 27.0700 26.5900 26.8700 658,800
No trading
27.3900 27.3900 26.5100 26.9500 1,048,500
26.5200 27.5700 26.4850 27.4500 1,347,700
27.0900 27.3350 26.6750 26.7500 1,663,000
Weekend
Weekend
26.4500 26.9900 26.2450 26.7000 3,849,200
26.1000 26.9500 26.0000 26.4200 3,490,800
26.4000 26.5500 25.3200 25.4800 2,660,600
26.7100 26.9500 25.7350 26.2400 2,021,900
27.1800 27.5500 26.6350 26.7200 5,380,500
Weekend
Weekend
28.4300 28.9300 27.0400 27.1100 2,266,700
29.1650 29.1700 27.9500 28.4800 2,063,200
28.8300 30.2600 28.7300 29.2700 1,655,100
28.5400 29.2800 28.5000 28.9600 997,300
29.3300 29.3450 28.6050 28.7500 1,176,000
Weekend
Weekend
29.1300 29.5400 29.1000 29.2200 1,644,900
28.7400 28.9350 28.2700 28.8200 1,602,500
26.7200 29.0410 26.5200 28.9000 2,099,500
26.1400 26.8850 26.0000 26.5150 1,580,200
26.2000 26.6600 25.9300 25.9700 1,380,700
Weekend
Weekend
26.0700 26.7600 25.9600 26.6900 574,600
No trading
25.8600 26.3900 25.7400 25.8200 1,368,200
24.6100 25.7700 24.3700 25.7400 1,407,200
24.1600 24.9000 23.9300 24.8300 1,350,900
Weekend
Weekend
22.8300 24.1900 22.4100 24.0800 1,711,300
23.7500 24.1400 22.6450 22.8000 2,031,100
23.3200 23.7500 23.0000 23.2300 1,256,300
23.3200 23.6850 22.9700 23.2100 1,454,700
24.7900 24.7900 23.4200 23.6000 1,695,400
Weekend
Weekend
24.5600 25.2150 24.3500 24.7100 1,845,600
26.1900 26.4430 24.8000 25.2850 2,231,400
26.9800 27.3600 26.2800 26.4700 2,286,100
27.4300 27.4300 26.0900 26.6100 2,295,400
27.6600 27.8900 26.9150 27.6000 1,554,100
Weekend
Weekend
26.5200 27.0450 26.1200 26.9800 1,544,700
27.4500 27.9000 26.8600 27.2100 1,712,300
27.4200 28.3600 27.2700 27.4300 1,787,400
28.1600 28.7400 27.2800 27.4400 2,100,300
30.3500 30.6100 28.8700 28.9400 2,752,900
Weekend
Weekend
30.3750 31.2000 29.0600 29.9200 4,042,600
2 · 10-Q Pre-market · 08:39 ET 10-Q ↗
33.6450 33.8400 28.5900 30.2700 5,743,500
1 · 8-K Pre-market · 07:07 ET 8-K ↗
31.3600 31.5600 30.5900 30.7400 2,888,800
30.3600 31.8200 30.0000 30.6600 2,674,400
31.4200 32.1900 30.0100 30.4800 3,009,100
Weekend
Weekend

Announcement Events

Each title opens the filing on the SEC website. Registered users can summarise the filing and up to seven relevant exhibits linked within the same SEC submission.

15 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:02 ET Summarise
14 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 08:57 ET Summarise
13 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:07 ET Summarise
12 DEFA14A DEFA14A (opens SEC filing in a new tab) Pre-market · 07:32 ET Summarise
11 DEF 14A DEF 14A (opens SEC filing in a new tab) Pre-market · 07:27 ET Summarise
10 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:09 ET Summarise
9 10-K 10-K (opens SEC filing in a new tab) Pre-market · 08:24 ET Summarise
8 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:12 ET Summarise
7 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:09 ET Summarise
6 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 09:17 ET Summarise
5 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:06 ET Summarise
4 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:42 ET Summarise
3 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:04 ET Summarise
2 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 08:39 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:07 ET Summarise