Ambarella, Inc AMBA

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Ambarella, Inc. - Ordinary Shares · Company · Nasdaq · Technology / Semiconductor Equipment & Materials

Paper trade (simulated — no real money)

Fill: USD 66.5000 · FX 1 USD = 1.277900 SGD · about SGD 84.9803 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 85.63 → 66.50 · -22.3%
95.51072.08048.650 1 2 3 4 5 6,7 8 9 10 11 12 13 Oct 25Jan 26Apr 26Jul 26Oct 26

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

Price & SEC Filing History 24 Oct 2025 — 25 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.

Weekend
Weekend
62.9100 67.7000 61.8000 66.5000 1,522,292
63.5100 65.4000 62.0800 63.1200 1,034,200
63.3200 69.3600 63.3200 66.0000 3,270,000
61.6800 64.2300 61.6000 63.2200 855,700
63.5000 64.0000 61.5000 62.7600 2,317,100
Weekend
Weekend
62.4300 63.3000 60.4000 61.7000 2,030,400
59.6000 63.5200 59.1200 63.3500 1,322,200
63.1400 63.3800 60.7100 61.4600 1,148,500
62.9700 64.8900 62.4800 64.3000 755,400
66.3100 66.9700 63.7100 64.8100 876,200
Weekend
Weekend
64.0000 67.8300 62.4300 67.4300 2,021,400
64.5000 64.9700 60.8600 62.8900 1,404,800
66.2500 67.4800 64.8700 65.3300 825,600
68.8000 69.1400 67.0300 67.9400 833,900
68.4000 69.4800 67.0500 68.2600 1,095,900
Weekend
Weekend
71.5000 71.5000 68.3700 68.6500 1,360,400
69.5100 70.9500 68.4700 70.3000 580,700
69.0300 70.7100 67.8700 69.5100 855,400
69.4600 69.7000 67.7400 68.7300 928,000
71.5900 72.0300 68.1100 68.6800 1,213,100
Weekend
Weekend
70.7600 74.9900 69.9000 72.6800 1,784,000
66.5900 71.0000 65.5600 69.8600 1,844,000
67.0500 70.3300 63.6500 67.6200 3,413,200
68.8500 69.1900 66.9500 67.0600 877,700
67.1400 69.3800 66.7500 68.8500 1,222,300
Weekend
Weekend
67.2800 67.5500 65.0800 66.1500 1,436,400
63.8500 68.9900 63.8500 66.9100 1,665,500
65.2300 65.2900 61.9100 62.7700 1,146,100
65.1200 67.6200 64.0400 64.3300 1,450,200
64.3000 65.6800 63.5000 63.9800 1,528,100
Weekend
Weekend
67.7600 69.1900 66.5300 67.8600 1,375,500
67.4400 69.2100 64.7100 67.8700 2,634,200
63.0700 71.2400 63.0100 68.8000 5,084,800
63.8300 66.6600 61.5900 63.4800 3,419,900
No trading
Weekend
Weekend
13 · 10-Q After market open · 13:45 ET 10-Q ↗
63.1800 64.9800 58.1200 62.8900 5,201,800
12 · 8-K After-hours · 16:19 ET 8-K ↗
66.6100 67.2000 63.0000 63.3800 2,731,100
67.8300 68.4900 66.2000 67.1400 1,302,100
67.9200 69.8600 66.6600 67.8300 1,251,200
70.6300 72.4000 69.0500 69.3800 876,400
Weekend
Weekend
71.1400 71.7200 68.2500 70.6300 1,329,000
71.6000 72.2200 70.1700 71.1600 718,000
70.8900 71.7800 69.0100 69.6400 698,600
71.4100 71.5000 69.2000 70.7800 593,700
72.6900 72.7200 69.7400 70.0000 1,261,600
Weekend
Weekend
73.2800 74.7000 71.5000 73.7300 989,500
74.3800 75.1000 72.2900 72.4500 778,300
75.7700 75.9900 71.7800 74.5900 935,300
75.8800 77.0400 74.5000 74.8200 1,017,200
82.0400 82.1800 78.0000 78.5400 1,473,100
Weekend
Weekend
82.1400 82.9800 80.7100 82.0400 546,500
82.5700 84.3100 81.1200 81.9600 551,700
85.2600 85.2600 82.0900 83.5300 776,800
83.7000 85.2700 82.1700 82.8900 852,200
86.6900 87.1700 81.9600 82.0400 898,900
Weekend
Weekend
86.2200 89.4400 85.5400 86.7800 1,316,900
80.9300 86.1900 80.2600 83.7900 1,205,300
81.5800 83.4800 79.3600 81.8500 1,410,000
82.3800 84.5000 81.0800 82.2300 1,744,600
84.0000 85.6200 81.8200 82.6800 2,953,600
Weekend
Weekend
76.7400 91.3400 74.0700 86.0000 9,207,200
71.0700 74.7900 68.7200 74.0900 1,513,600
67.8200 75.6200 65.6600 69.1900 2,742,400
65.6900 69.8600 64.3600 68.9700 2,267,300
68.5200 69.8000 63.1500 68.2300 1,880,900
Weekend
Weekend
68.4400 69.3300 66.6000 68.0600 1,415,600
67.3400 70.6700 66.1600 70.5100 1,541,900
70.8900 72.1700 67.3200 69.0100 1,497,100
69.2500 71.3300 67.3400 71.3000 1,974,100
63.0000 65.8200 62.4500 65.7000 1,618,800
Weekend
Weekend
60.5100 64.2900 59.3500 61.8400 1,824,800
66.5900 67.2300 61.8000 63.2900 1,883,100
74.2400 74.9000 65.6400 68.8800 1,374,000
74.6400 74.6600 70.2800 72.9000 1,079,600
75.0000 75.5100 71.6600 72.0000 1,324,000
Weekend
Weekend
78.2600 79.2700 75.8500 77.3000 852,800
77.3800 80.1300 74.8700 78.3800 1,357,500
71.5900 76.6900 71.4500 74.7400 1,746,900
75.2100 76.0000 70.7500 71.8200 1,624,400
83.1400 88.4400 78.9400 79.7300 1,889,700
Weekend
Weekend
No trading
88.1000 91.2900 76.8600 78.3600 2,306,900
11 · 8-K After-hours · 17:16 ET 8-K ↗
83.6300 94.0000 81.4300 88.3400 4,049,300
67.8900 88.5800 67.5000 85.8000 7,006,800
63.1600 67.4200 60.3400 67.0100 1,739,100
Weekend
Weekend
62.0100 63.1800 61.1200 62.1300 1,991,500
65.6700 65.8700 61.0000 64.1100 986,000
65.5600 65.6900 61.8100 62.9900 1,074,000
66.3900 68.8000 65.2800 65.5100 1,025,600
71.0700 71.6300 69.2800 70.7100 881,200
Weekend
Weekend
No trading
68.0300 70.1400 66.1800 69.9700 2,102,000
68.1500 69.0000 65.6400 65.8800 895,200
69.6600 71.1000 67.0800 67.1200 902,000
70.6000 71.2500 69.5600 70.1400 1,063,500
Weekend
Weekend
66.0400 68.3200 64.3300 67.7800 877,600
63.9700 65.9400 62.6000 65.8000 959,100
65.7000 67.4300 62.1000 62.6300 1,203,400
10 · DEFA14A Pre-market · 08:30 ET DEFA14A ↗
70.1500 70.1500 61.8000 65.7500 1,607,000
66.0100 69.5000 64.6700 68.7200 1,789,300
Weekend
Weekend
69.8900 70.2600 63.2500 63.5200 2,124,500
71.0500 73.2900 68.5700 72.0500 1,701,500
78.3200 79.7500 72.0800 73.8000 2,195,600
9 · 10-Q After market open · 14:40 ET 10-Q ↗
78.6900 81.5300 76.0000 78.3800 1,861,800
72.9800 77.9900 72.2500 75.6700 2,897,300
Weekend
Weekend
82.5200 85.9000 71.0500 72.1800 7,413,600
8 · 8-K After-hours · 16:10 ET 8-K ↗
90.7500 94.2300 88.0000 91.8400 2,836,900
94.8100 95.0000 88.2300 90.5800 2,135,600
92.5900 96.3600 89.4500 93.5700 1,955,500
No trading
Weekend
Weekend
84.5700 89.4000 84.1400 87.5500 1,031,000
83.3800 84.9600 81.8100 83.6400 649,300
77.8600 83.6100 77.8600 83.0000 990,000
76.4500 78.4000 74.3300 76.6900 511,600
81.9600 82.5000 77.9000 78.8800 876,900
Weekend
Weekend
7 · DEFA14A After-hours · 17:09 ET DEFA14A ↗ 6 · DEF 14A After-hours · 17:07 ET DEF 14A ↗
78.5000 82.4300 78.0000 81.1600 831,300
81.8500 82.8600 79.5000 81.0400 764,500
81.2400 83.3700 78.6500 82.1000 1,228,200
78.5700 80.0000 74.9400 78.1900 913,700
79.4800 81.0200 77.9200 79.7200 1,294,200
Weekend
Weekend
75.1200 76.9800 73.5100 76.3000 1,059,400
78.0100 78.6000 73.5200 74.2700 1,547,200
76.1000 76.9300 72.7300 75.4800 962,100
72.0000 74.4400 70.5000 74.3600 834,100
72.0300 72.1500 69.4300 70.7200 777,100
Weekend
Weekend
68.5200 71.5700 67.3200 71.5600 627,000
66.5000 69.2900 65.2200 68.8000 746,600
64.5400 65.9800 63.7000 65.9400 635,600
62.9600 64.2800 62.1800 63.7500 472,300
67.0900 67.5700 64.2400 64.8600 492,100
Weekend
Weekend
63.3000 67.2300 63.3000 66.8700 928,400
61.4400 62.4000 59.0700 61.3400 814,700
60.6300 61.5000 60.0000 61.2800 506,900
59.5900 60.7400 59.0000 59.9800 857,900
57.0900 59.5300 55.0000 59.2800 1,161,100
Weekend
Weekend
59.2400 59.5000 57.5400 58.2300 951,000
57.3600 58.2700 56.8200 57.3200 724,900
56.2000 57.6600 56.1100 57.1400 525,400
55.0100 56.7200 54.5000 56.2000 594,300
52.5900 54.4400 52.4800 54.3000 669,000
Weekend
Weekend
53.8100 54.9000 52.5600 52.7800 1,214,600
52.9600 54.3300 52.9500 53.2400 742,900
54.6900 55.2700 52.3700 53.2800 621,600
50.9100 51.4400 50.0400 50.9900 488,000
50.8800 51.8600 50.3700 51.0000 590,900
Weekend
Weekend
No trading
49.5700 51.8300 49.2400 50.5400 668,100
52.5300 53.1400 50.8500 51.0800 861,700
49.8100 51.5200 49.2200 51.4800 618,400
51.1900 51.2300 48.3000 48.6500 759,100
Weekend
Weekend
51.8500 52.3500 49.9300 50.4700 522,700
53.3400 54.2500 52.5200 52.6700 578,000
55.0600 55.8200 53.8100 54.0900 387,300
53.6600 55.4700 53.4600 54.5300 618,500
5 · 10-K After market open · 14:15 ET 10-K ↗
56.4200 57.1900 54.3700 54.5800 577,900
Weekend
Weekend
55.8600 55.8600 53.3000 54.0200 1,668,100
52.7100 56.6600 52.2500 55.8600 1,160,000
52.7400 54.9000 52.2600 53.9600 1,678,100
53.0500 53.5000 52.1600 52.6900 800,400
53.0800 53.4400 52.2000 52.3900 844,100
Weekend
Weekend
52.9400 53.4900 51.6600 52.2900 630,100
52.9000 54.1800 52.1000 52.4200 748,100
53.8400 54.6200 53.4700 54.0000 635,300
53.2600 55.5600 52.7500 54.0000 744,700
50.9000 53.5700 49.8900 53.2600 1,028,000
Weekend
Weekend
53.6000 54.7200 52.3200 52.3800 958,900
55.4900 56.9000 54.5600 55.4100 621,700
58.3900 58.5000 56.5200 56.5500 794,300
58.0600 59.1700 56.9300 57.4500 1,005,300
57.9000 62.0600 56.3100 61.0400 1,385,900
Weekend
Weekend
4 · 8-K After-hours · 17:13 ET 8-K ↗
61.0500 62.0000 56.0600 60.3400 4,388,400
3 · 8-K After-hours · 16:24 ET 8-K ↗
70.6200 72.3100 69.2500 70.9000 1,491,200
72.4600 72.7300 69.0700 70.2900 691,300
68.1100 71.4300 68.0600 71.2100 806,100
67.6200 68.1200 65.9400 67.1300 687,300
Weekend
Weekend
65.6900 68.5700 65.5900 68.0100 896,600
65.3900 66.2900 64.0000 66.2300 495,600
66.0100 66.5000 65.1000 65.8600 532,800
65.3300 66.9600 64.0100 65.7900 367,900
No trading
Weekend
Weekend
64.8800 67.2200 63.8600 66.2100 487,800
67.0200 67.2600 63.7700 65.9200 817,100
67.9900 68.0000 65.1900 66.8700 725,000
65.7400 68.3000 65.4500 66.2600 634,300
63.0000 65.3000 61.5100 65.2500 653,900
Weekend
Weekend
61.1000 64.0900 60.8300 63.6400 705,600
59.7400 60.6800 58.5800 59.4500 688,100
60.2000 62.3100 59.2300 60.7500 801,300
63.6000 64.8000 59.1100 60.2300 903,300
63.1800 65.5700 62.5500 62.8800 844,600
Weekend
Weekend
64.2400 65.4400 63.0800 64.0400 872,200
66.3300 66.8300 63.8600 65.9000 548,500
67.4400 69.0500 66.6600 66.6900 434,800
67.9600 68.0600 66.2400 66.3500 466,200
66.7800 68.7000 66.4900 67.0400 449,700
Weekend
Weekend
68.8100 68.9600 66.7400 67.1900 545,300
69.9500 71.4000 68.9100 69.0700 740,300
67.1000 69.6000 65.9500 68.5700 961,300
66.7500 67.6900 65.2400 65.7400 746,400
No trading
Weekend
Weekend
66.6200 70.7700 66.0500 68.7300 1,516,300
66.4400 66.8400 64.3200 64.6000 1,245,000
65.5400 65.9900 64.0000 64.8000 1,071,900
68.8700 69.0500 65.5100 65.6400 1,696,000
68.1300 68.7500 66.7000 68.5700 1,678,500
Weekend
Weekend
71.0000 71.5000 69.0400 69.2500 1,785,700
70.0300 71.5300 68.4800 70.7800 1,209,300
79.8100 79.8100 70.1900 70.5400 2,380,600
79.1900 81.3500 77.1400 80.6400 1,024,900
76.9600 77.8200 73.7800 77.1100 1,470,500
Weekend
Weekend
72.8300 76.0000 72.8300 75.1600 938,700
No trading
69.9800 71.3700 69.9800 70.8400 514,400
71.3600 71.4200 69.6900 69.7700 483,000
70.4000 71.4500 69.7900 70.0700 604,700
Weekend
Weekend
72.1500 72.3400 71.1100 71.4000 426,700
No trading
71.9800 72.4100 71.3900 71.7500 318,700
72.7700 73.3300 71.5300 71.9800 651,700
73.5000 74.5800 72.6100 72.8200 650,800
Weekend
Weekend
70.5400 72.5700 70.4400 72.5200 1,006,700
72.6700 73.1300 70.2700 70.4600 540,600
72.8600 73.6800 69.6200 69.9800 566,600
72.4300 73.3300 71.2000 71.9800 703,900
75.9600 76.8900 73.4400 73.8000 557,500
Weekend
Weekend
77.8200 79.5000 74.5200 75.2800 732,900
78.2600 79.4000 74.8000 79.1400 759,800
78.3600 79.9500 77.6300 79.0200 750,100
76.1500 78.8000 76.0100 78.2500 771,800
75.4500 78.2000 74.5000 76.6900 1,041,600
Weekend
Weekend
72.4600 75.4000 71.6900 74.1000 1,037,800
2 · 10-Q After market open · 14:30 ET 10-Q ↗
70.0000 71.4800 69.2900 71.0600 997,900
71.6500 71.6500 68.7900 70.1100 1,605,800
72.0000 73.4600 70.7000 71.0900 1,767,100
72.5000 73.2900 69.8000 70.9200 1,299,800
Weekend
Weekend
75.0100 75.2300 72.7700 74.1800 939,500
No trading
79.9700 80.4300 73.6800 73.8900 4,416,200
1 · 8-K After-hours · 16:14 ET 8-K ↗
87.6200 91.1800 84.7000 90.9700 1,699,600
86.1100 90.6700 85.4500 89.5700 1,139,500
Weekend
Weekend
83.5100 87.2900 80.3100 86.1400 966,000
90.6200 92.7900 83.1700 83.3200 1,083,900
85.0000 89.1400 83.0900 87.4400 875,900
82.0800 84.7000 81.5000 83.0900 577,800
86.2200 88.7500 83.0600 84.0600 798,600
Weekend
Weekend
85.8000 89.5300 85.5000 87.8400 706,400
93.1700 94.5000 87.0900 88.7500 1,010,800
94.6800 96.6900 93.0000 95.5100 880,300
92.6500 95.7200 92.0400 93.5300 809,400
92.3400 95.5800 91.7500 94.4200 871,300
Weekend
Weekend
86.7300 89.8400 82.9200 89.6700 951,300
87.0000 94.7900 86.5300 90.6200 1,478,200
82.4700 87.0700 82.3800 86.5000 296,100
81.8900 84.5600 81.2600 81.9700 424,800
87.0000 87.7700 85.1300 85.2800 471,500
Weekend
Weekend
85.7800 87.3800 84.3100 85.2300 321,600
85.4900 86.5000 83.5700 84.6800 440,600
87.1700 87.9700 84.8100 86.0000 354,700
86.4100 87.4900 84.9900 86.3000 283,600
87.3500 88.3400 86.4700 86.5400 452,600
Weekend
Weekend
85.8800 86.5000 83.2200 85.6300 411,000

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.

13 10-Q 10-Q (opens SEC filing in a new tab) After market open · 13:45 ET Summarise
12 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:19 ET Summarise
11 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:16 ET Summarise
10 DEFA14A DEFA14A (opens SEC filing in a new tab) Pre-market · 08:30 ET Summarise
9 10-Q 10-Q (opens SEC filing in a new tab) After market open · 14:40 ET Summarise
8 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:10 ET Summarise
7 DEFA14A DEFA14A (opens SEC filing in a new tab) After-hours · 17:09 ET Summarise
6 DEF 14A DEF 14A (opens SEC filing in a new tab) After-hours · 17:07 ET Summarise
5 10-K 10-K (opens SEC filing in a new tab) After market open · 14:15 ET Summarise
4 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:13 ET Summarise
3 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:24 ET Summarise
2 10-Q 10-Q (opens SEC filing in a new tab) After market open · 14:30 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:14 ET Summarise