Allegro MicroSystems, Inc ALGM

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Allegro MicroSystems, Inc. - Common Stock · Company · Nasdaq

Paper trade (simulated — no real money)

Fill: USD 46.0300 · FX 1 USD = 1.288650 SGD · about SGD 59.3166 per unit

Sign in to place simulated trades. 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 34.37 → 46.03 · 33.9%
69.62046.21022.800 1 2 3 4 5 6 7 8 9 10 11 12 13 14,15 Jul 25Oct 25Jan 26Apr 26Jul 26

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

Price & SEC Filing History 26 Jul 2025 — 27 Jul 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
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
15 · DEFA14A Pre-market · 07:32 ET DEFA14A ↗ 14 · 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
13 · 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
12 · 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
11 · 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
10 · 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
9 · 10-Q Pre-market · 09:17 ET 10-Q ↗
36.9600 39.8900 34.5500 37.9800 10,056,900
8 · 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
7 · 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
6 · 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
5 · 10-Q Pre-market · 08:39 ET 10-Q ↗
33.6450 33.8400 28.5900 30.2700 5,743,500
4 · 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
31.7300 31.7500 30.7900 30.9100 2,559,600
30.0200 31.1700 29.9100 30.9900 3,278,500
30.0700 31.5400 30.0700 30.7000 3,883,300
30.6450 31.3000 30.2100 31.0500 2,307,500
29.4800 30.9800 29.3000 30.4900 1,933,000
Weekend
Weekend
29.0800 29.2800 28.4600 29.0550 1,772,400
29.1100 29.6000 29.0100 29.3300 2,613,200
28.2500 29.6500 27.8400 28.8800 3,079,000
26.7000 28.2500 26.5400 27.6100 1,989,500
26.9300 27.5500 26.5800 27.4100 1,444,600
Weekend
Weekend
27.6800 27.9000 25.8700 25.9200 2,454,200
28.3550 28.3550 27.0250 27.7600 2,531,800
27.5200 28.3000 27.3800 28.2800 3,230,800
28.5100 28.5800 26.9700 27.5000 1,756,600
28.8800 28.9900 27.8000 28.2200 1,905,500
Weekend
Weekend
28.6400 28.8300 28.1200 28.3200 1,545,800
28.9100 28.9800 28.2500 28.4100 1,486,900
28.9700 29.1800 28.0400 28.4200 1,742,900
29.2600 29.6300 28.8500 29.2000 1,274,200
30.1800 30.3100 29.1350 29.1600 1,497,600
Weekend
Weekend
30.0200 30.4250 29.5200 29.7100 966,100
30.4400 30.6400 29.7300 29.9300 1,343,900
31.4000 31.7400 31.0000 31.0700 919,100
31.6600 32.0800 31.3200 31.4100 1,254,100
31.5500 32.1100 31.2800 31.4200 1,433,200
Weekend
Weekend
32.1550 32.1550 30.7300 31.4500 3,402,900
31.7000 32.0400 31.4600 31.9500 1,715,400
30.2000 31.3000 29.9500 30.7500 1,237,300
29.9200 30.2700 29.7900 30.1300 987,800
29.8600 30.6400 29.7150 29.8700 1,376,300
Weekend
Weekend
30.2200 30.2700 29.6900 29.8000 1,146,800
30.9300 31.1950 29.7900 29.9700 1,604,500
30.9900 31.1350 30.0000 30.5100 2,130,100
30.4400 30.9300 30.2050 30.9200 1,494,100
30.1650 30.6700 29.9800 30.3900 1,642,900
Weekend
Weekend
30.5100 30.9800 30.2900 30.5700 1,414,600
29.5100 30.1500 28.9400 30.1000 1,465,000
30.5000 30.6300 29.3720 29.8300 1,136,600
30.0000 30.5700 29.4450 30.5000 1,620,900
No trading
Weekend
Weekend
31.7900 31.9550 30.7200 30.8500 1,204,000
31.8100 33.2000 31.7550 32.0100 2,170,300
31.4200 31.8400 31.2300 31.4600 1,777,400
31.9700 32.6700 31.4500 31.6500 1,812,800
32.0100 32.1600 31.6000 31.7600 842,200
Weekend
Weekend
31.2200 32.9300 30.9400 32.1300 1,365,800
30.1000 30.9200 29.9800 30.8800 802,800
30.5900 31.1900 29.8150 30.4800 2,031,200
30.8600 31.1150 30.4200 30.6400 1,028,000
30.6400 31.0200 30.5100 30.8300 1,158,100
Weekend
Weekend
31.1300 31.1300 30.5500 30.7000 1,159,800
31.1300 31.3900 30.7300 31.1000 916,400
32.0700 32.3500 31.5600 31.8600 1,074,300
30.2900 32.2200 30.0200 31.8900 1,715,900
30.8500 30.9400 29.7100 29.8100 1,193,300
Weekend
Weekend
3 · 8-K After-hours · 16:07 ET 8-K ↗
30.7800 31.0550 30.1200 30.7700 1,850,300
31.4600 31.5850 30.4750 30.7200 1,028,600
30.9700 31.0000 30.2800 30.8100 1,066,200
31.7800 31.7800 30.4550 31.2400 1,245,400
31.4900 31.7800 31.1000 31.4700 1,287,500
Weekend
Weekend
31.1300 31.4770 30.2850 31.2600 2,066,200
2 · 10-Q Pre-market · 08:23 ET 10-Q ↗
32.2050 32.7000 30.5040 31.4100 3,423,900
1 · 8-K Pre-market · 07:08 ET 8-K ↗
34.4100 34.5050 33.1600 33.8700 2,909,300
34.7100 35.2000 33.8900 34.0100 1,388,800
34.1900 34.7600 33.7300 34.3700 1,182,400
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 DEFA14A DEFA14A (opens SEC filing in a new tab) Pre-market · 07:32 ET Summarise
14 DEF 14A DEF 14A (opens SEC filing in a new tab) Pre-market · 07:27 ET Summarise
13 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:09 ET Summarise
12 10-K 10-K (opens SEC filing in a new tab) Pre-market · 08:24 ET Summarise
11 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:12 ET Summarise
10 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:09 ET Summarise
9 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 09:17 ET Summarise
8 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:06 ET Summarise
7 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:42 ET Summarise
6 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:04 ET Summarise
5 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 08:39 ET Summarise
4 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:07 ET Summarise
3 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:07 ET Summarise
2 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 08:23 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:08 ET Summarise