Amprius Technologies, Inc AMPX

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Amprius Technologies, Inc. Common Stock · Company · NYSE

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

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

USD 8.19 → 10.17 · 24.2%
22.91014.6356.360 1,2 3 4 5,6 7 8 9 10 11 12 13,14 15 16,17 18 19 Jul 25Oct 25Jan 26Apr 26Jul 26

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

Price & SEC Filing History 22 Jul 2025 — 23 Jul 2026 (Last year)

Daily NYSE 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
10.5000 10.8500 10.1600 10.1700 4,012,812
10.4500 10.9100 10.2400 10.8800 5,576,600
10.3300 10.3800 9.9300 10.1400 4,800,900
Weekend
Weekend
9.9400 10.4500 9.4950 10.1600 5,853,700
10.9600 10.9690 9.8000 10.1000 9,752,900
11.2000 11.6000 10.9500 11.3400 4,322,900
11.3100 11.4900 11.0100 11.1200 5,378,400
11.3200 11.4600 10.7720 11.0800 6,510,900
Weekend
Weekend
11.9800 12.0500 11.3700 11.5300 4,685,800
12.1100 12.3000 11.6000 11.8800 5,064,600
11.5500 11.9300 11.1800 11.5800 7,182,600
12.5500 12.7200 11.7000 11.7200 11,335,100
12.5300 13.6800 12.4600 13.0900 6,363,700
Weekend
Weekend
No trading
13.3800 14.4680 12.2620 12.3800 8,290,200
13.5300 14.1100 13.1300 13.5900 7,289,000
13.8400 14.5800 13.6800 13.8600 7,450,700
13.2850 13.8400 12.9900 13.5200 5,967,000
Weekend
Weekend
12.1100 13.1200 12.0950 12.9100 10,882,300
12.8600 13.0830 11.7550 12.5600 9,519,700
14.3000 14.4000 12.2800 12.5200 12,801,000
14.9800 15.2100 14.0850 14.1200 7,591,900
16.3300 16.6300 15.2700 15.6500 4,886,200
Weekend
Weekend
No trading
15.3000 16.1900 14.8400 16.1700 7,798,300
19 · 8-K After-hours · 16:25 ET 8-K ↗
15.5800 15.6400 14.9700 15.0000 7,950,900
16.7000 16.8000 15.4000 15.4900 7,064,300
16.8700 17.2600 16.5800 16.8200 5,026,400
Weekend
Weekend
17.2050 17.4500 15.8500 16.3100 6,504,500
16.5700 17.1300 16.2100 17.1000 5,814,000
17.0900 17.6700 16.4050 16.4300 4,899,900
19.2300 19.4900 16.3300 17.4200 8,581,200
20.2200 20.4410 18.5000 18.8300 4,967,300
Weekend
Weekend
21.8700 22.0010 19.0900 19.6900 8,332,500
21.3000 22.9400 20.8000 22.5400 7,383,400
22.7000 23.4000 21.7000 21.7400 8,484,500
21.8150 24.2250 21.7000 22.9100 10,605,000
20.5000 22.2500 19.9600 21.7500 9,544,700
Weekend
Weekend
20.4900 20.7800 19.1600 20.2800 8,755,600
18.3050 22.1100 18.3050 20.8500 26,300,300
17.5600 17.6750 16.8100 17.1600 4,922,200
16.5000 18.0400 16.4900 17.8300 11,035,200
No trading
Weekend
Weekend
15.5800 16.3500 15.4300 16.0300 7,423,100
14.7700 15.3900 14.3200 15.3000 10,883,900
15.6500 15.8000 14.2500 15.0700 14,989,200
18 · 8-K/A After-hours · 16:40 ET 8-K/A ↗
15.6000 16.0000 14.7850 15.4800 6,481,900
16.7100 16.8400 15.0800 15.8700 7,246,600
Weekend
Weekend
17.4500 17.4500 16.7400 16.8500 5,929,500
17.4100 18.2100 17.3100 17.8700 5,218,700
18.7800 19.0500 17.3800 17.5200 8,956,400
17.4000 18.8900 17.2300 18.8300 10,461,300
16.5750 18.8900 16.2300 17.6800 11,845,200
Weekend
Weekend
16.9200 17.1500 16.0000 16.7000 12,487,700
17 · 8-K After-hours · 17:36 ET 8-K ↗ 16 · 10-Q After-hours · 16:52 ET 10-Q ↗
19.1350 19.5600 15.3800 16.1100 30,554,300
15 · 8-K After-hours · 16:11 ET 8-K ↗
21.5900 22.3500 20.7000 22.1900 7,649,800
20.6500 21.6900 20.4700 21.4000 6,702,400
21.3800 21.4700 19.8100 20.3800 5,303,400
Weekend
Weekend
21.1200 21.7050 20.1600 20.8700 6,104,700
20.5500 21.4750 20.4200 21.0600 5,656,800
19.9350 20.4500 19.6300 20.3400 5,508,900
14 · DEFA14A Next filing day · accepted 28 Apr, 18:52 ET DEFA14A ↗ 13 · DEF 14A Next filing day · accepted 28 Apr, 18:50 ET DEF 14A ↗
20.7500 21.0900 19.1000 19.6900 8,030,400
20.6950 21.7600 20.6110 21.4200 5,461,000
Weekend
Weekend
22.0700 22.2400 20.3200 20.6600 5,956,900
22.3800 22.6900 20.7300 21.7300 7,347,900
21.8600 22.8000 21.2700 22.6900 10,413,900
12 · 8-K After-hours · 16:58 ET 8-K ↗
20.0600 22.7000 19.8700 21.4300 20,890,500
18.4700 20.1900 18.3100 19.6100 10,725,300
Weekend
Weekend
19.2100 19.2700 18.4700 18.6700 5,238,200
18.4500 19.3000 17.8900 19.1300 8,659,800
18.0700 18.5200 17.4700 18.3000 5,761,000
19.0000 19.1550 17.2310 17.8900 7,648,000
17.2300 18.4900 16.8300 18.3900 10,084,200
Weekend
Weekend
16.2500 17.4400 16.2500 17.2200 6,474,400
16.6300 17.6500 15.8700 16.1500 7,418,600
17.9700 18.1800 16.8200 16.9200 6,798,600
17.4100 17.7800 15.7600 16.7000 6,701,000
16.0900 17.6300 16.0600 17.5600 6,862,100
Weekend
Weekend
No trading
15.0000 16.4700 14.8000 16.0000 5,950,100
17.0500 17.3300 15.3500 15.5200 9,183,600
15.0100 16.9900 14.8100 16.8600 9,553,400
16.1600 16.3000 14.5000 14.7200 9,988,800
Weekend
Weekend
17.0800 17.0800 15.9000 16.1200 6,943,600
17.3900 18.1000 16.7900 17.1600 5,939,100
18.0900 18.6500 17.8100 17.9300 8,702,600
18.4000 18.7900 17.3400 17.7600 7,899,200
17.9100 19.3900 17.7600 18.6800 7,180,200
Weekend
Weekend
19.2000 19.7500 17.7400 18.2000 9,416,100
18.6100 19.3500 17.8470 19.1100 7,124,700
19.3800 19.7600 18.8150 18.9000 6,304,700
18.6000 19.5200 18.6000 19.3800 7,304,300
17.8000 19.1600 17.7010 18.6900 8,155,200
Weekend
Weekend
18.2300 19.0400 17.6300 17.9500 8,823,300
18.6800 18.7900 17.6900 18.2900 10,693,100
18.1300 19.4000 18.1000 18.5900 11,035,600
17.4600 18.9500 17.4100 18.0000 14,115,600
16.1300 17.7400 15.8700 17.7200 15,020,200
Weekend
Weekend
11 · 10-K After-hours · 16:21 ET 10-K ↗
14.7300 17.2900 14.5350 16.3300 23,915,800
13.4700 15.0490 13.2500 14.8900 28,472,300
10 · 8-K After-hours · 16:20 ET 8-K ↗
12.1300 12.7800 11.8500 12.5500 9,734,600
11.1300 12.1200 10.9700 11.6300 7,380,500
10.4200 12.0100 10.3500 11.5900 10,462,800
Weekend
Weekend
11.0700 11.1250 10.4450 10.7300 7,019,100
10.8100 11.5600 10.7100 11.5200 8,038,200
10.9700 11.5900 10.9400 11.0600 7,136,300
10.0100 10.8300 9.9000 10.8000 6,079,200
10.3100 10.7700 9.9000 10.2000 7,807,800
Weekend
Weekend
10.1500 10.4900 9.3300 9.5200 5,125,300
9.5300 10.3900 9.4600 10.3500 4,097,100
9.7500 10.3300 9.6500 9.9100 4,144,000
9.7800 9.9900 9.2300 9.7700 4,344,500
No trading
Weekend
Weekend
10.1300 10.4900 9.7640 9.9700 7,118,000
11.0000 11.0200 10.0100 10.1900 5,885,300
11.9500 12.0400 10.6700 11.1100 5,668,300
12.2400 12.5600 11.4000 11.5500 5,848,200
11.9000 13.1300 11.7000 12.4900 7,466,800
Weekend
Weekend
11.2750 12.2800 11.0200 12.2400 8,553,500
11.9600 12.4000 10.5000 10.5800 10,551,600
14.6700 14.7100 12.0000 12.4000 15,230,400
13.9000 14.8600 13.6200 14.6800 15,366,500
9 · 8-K Pre-market · 08:35 ET 8-K ↗
12.3900 13.6900 12.3100 13.1500 9,921,000
Weekend
Weekend
13.2500 14.0000 12.2000 12.4400 11,542,100
12.9400 13.7800 12.3700 13.5800 18,270,800
11.6700 12.0200 11.3700 11.9800 7,676,700
11.0300 11.6770 10.8200 11.5800 5,623,400
11.1000 11.3800 10.7200 10.9000 5,333,400
Weekend
Weekend
11.9500 12.0500 11.1000 11.1700 7,158,600
11.7100 12.1400 11.4650 11.9500 10,008,100
11.5000 12.0100 10.6500 11.2700 12,359,800
10.4500 11.9500 10.3000 11.1700 10,213,600
No trading
Weekend
Weekend
10.2300 11.2000 10.1200 11.0000 10,512,800
10.4200 10.8400 10.1100 10.1500 8,720,400
9.4300 10.3800 9.1700 10.3600 6,809,700
10.1700 10.2190 9.3850 9.6700 7,996,200
9.7300 10.4150 9.6000 10.0100 8,935,000
8 · 8-K Pre-market · 08:36 ET 8-K ↗
Weekend
Weekend
9.4000 9.6050 9.1400 9.4800 6,277,500
8.9500 9.7100 8.8300 9.2400 6,866,100
8.9200 9.0290 8.7150 8.9000 6,674,200
9.2600 9.2900 8.7300 9.1900 5,711,500
9.3000 9.4900 8.9800 9.2100 5,843,300
Weekend
Weekend
8.4500 8.8950 8.2300 8.7400 5,810,000
No trading
7.8500 8.0100 7.7100 7.8900 6,439,400
7.9500 8.0400 7.8000 7.8300 4,828,000
8.1000 8.3200 7.8200 7.9200 5,435,800
Weekend
Weekend
8.4100 8.4700 8.1200 8.2700 3,786,400
No trading
8.6000 8.6290 8.3900 8.5300 2,699,200
8.7900 9.1000 8.5300 8.7200 6,354,500
9.2150 9.4400 8.8400 9.0700 6,145,700
7 · 8-K Pre-market · 08:43 ET 8-K ↗
Weekend
Weekend
9.2700 9.6200 9.2500 9.3500 8,061,800
9.1200 9.6490 9.0300 9.1500 7,054,700
10.1900 10.3600 8.7700 8.7800 10,127,300
9.9000 10.3600 9.8400 10.2800 4,125,400
11.0000 11.0650 10.0000 10.0500 4,686,100
Weekend
Weekend
11.2800 11.5800 10.8000 10.9100 4,326,900
10.7800 11.5000 10.1450 11.4400 5,560,800
11.5200 11.5430 10.7600 11.0400 6,415,900
11.6100 11.9850 11.3500 11.7000 5,136,000
12.3200 12.5700 11.6720 11.8000 5,037,200
Weekend
Weekend
12.1400 12.5550 12.0600 12.1800 4,583,900
11.4700 12.4850 11.2700 12.2200 6,719,600
10.6900 11.5400 10.5000 11.5200 5,197,700
10.8300 11.2000 10.7200 10.8600 4,031,500
10.8700 10.9900 10.5000 10.6100 3,089,300
Weekend
Weekend
11.0000 11.4550 10.8400 11.3200 2,351,300
No trading
10.9200 11.0000 10.4000 10.8100 4,739,900
10.6800 10.8800 10.2200 10.7300 3,964,100
10.2400 10.8450 10.1600 10.8000 6,642,600
Weekend
Weekend
10.2500 10.4200 9.3600 10.1100 7,578,000
11.5000 11.8000 10.2850 10.3000 7,372,100
10.6900 11.4500 10.6200 10.8100 4,879,200
10.1300 11.1100 9.9100 10.6700 7,661,100
11.0000 11.3250 10.1700 10.4300 7,932,800
Weekend
Weekend
10.8000 11.7400 10.6300 11.2900 6,433,200
12.2400 12.2500 10.9500 11.7200 10,214,100
13.2800 13.8500 12.0500 12.3700 9,481,600
13.5700 13.5800 12.1650 12.9200 9,834,700
13.3900 14.4900 12.9000 13.5900 12,962,600
Weekend
Weekend
11.8400 12.7400 10.9000 12.7300 11,325,700
6 · 10-Q After-hours · 17:11 ET 10-Q ↗ 5 · 8-K After-hours · 16:11 ET 8-K ↗
12.7200 12.8000 10.6200 11.2600 13,493,000
12.4900 13.2500 12.1550 13.0400 7,191,900
12.4150 12.8600 12.0900 12.1000 7,712,600
14.5000 14.6800 13.3600 13.5600 8,263,900
Weekend
Weekend
12.6800 14.2150 12.5400 14.0900 11,778,500
12.2700 12.5300 11.9300 12.2900 3,639,700
12.0100 12.9000 11.8300 12.5000 6,331,800
12.7900 12.8700 11.7100 11.9000 5,500,400
13.2600 13.3800 12.3700 12.6300 6,232,200
Weekend
Weekend
12.3100 13.1700 12.0300 12.8900 6,296,200
11.4600 11.9450 11.3500 11.6600 4,100,500
11.9500 12.1000 10.7550 11.3900 11,894,100
13.1600 13.3000 12.0500 12.2100 9,201,400
12.3600 13.5400 11.8900 13.5300 9,599,700
Weekend
Weekend
12.5500 12.5580 11.5750 11.8400 10,395,500
15.7600 15.7600 12.7100 12.7800 15,016,500
14.0000 16.0300 13.9060 14.6100 19,829,600
12.4000 13.5200 11.7700 13.2500 9,867,700
12.5500 13.9050 12.5200 12.9000 11,295,500
Weekend
Weekend
12.6500 13.4600 11.8200 11.9300 11,914,700
12.8000 13.3700 12.3900 12.8100 6,544,800
12.8400 13.3000 12.3900 12.4200 7,742,400
13.5900 14.0700 12.6500 12.6700 10,366,400
13.2300 13.9100 12.8150 13.4400 13,600,200
4 · 8-K Pre-market · 08:38 ET 8-K ↗
Weekend
Weekend
12.7500 12.8500 12.2100 12.7400 7,614,200
12.1600 13.2050 11.9600 12.4900 11,551,500
10.4800 12.2000 10.3600 12.0400 10,435,400
10.5900 10.7700 10.0500 10.5200 7,813,800
11.0800 11.4200 10.4200 10.6700 6,701,100
Weekend
Weekend
11.0200 11.6900 10.7350 10.9300 5,794,600
10.4000 11.1400 10.0600 11.0700 8,234,400
11.9000 12.0000 10.8500 11.0900 9,070,300
12.1800 12.2850 11.4000 11.6900 10,230,000
11.5250 12.0700 11.1500 12.0600 8,371,000
Weekend
Weekend
11.5200 12.1000 11.4000 11.7700 17,188,700
10.5100 11.5400 10.5100 11.4700 14,228,800
9.1500 10.4300 8.9100 10.3900 16,395,400
8.4000 9.2400 8.0800 9.1400 11,617,900
8.4000 8.7600 8.1700 8.3700 8,758,200
Weekend
Weekend
8.1200 8.3400 7.9600 8.1300 6,038,700
7.6800 8.4700 7.4100 8.1400 13,850,400
8.0100 8.1800 7.3700 7.3700 9,290,500
7.7000 7.8550 7.3100 7.8200 7,795,100
7.1800 7.9400 7.1800 7.6900 10,369,100
Weekend
Weekend
7.0200 7.3200 6.6750 7.1100 4,213,400
7.0200 7.1300 6.8320 6.9300 5,277,800
7.4500 7.5200 7.0750 7.0900 3,846,500
3 · 8-K After-hours · 16:03 ET 8-K ↗
6.8400 7.4200 6.6600 7.3200 4,571,400
No trading
Weekend
Weekend
7.3600 7.3600 6.7810 7.0900 4,671,300
7.3400 7.5050 7.0200 7.3800 4,385,600
7.8300 7.8500 7.2900 7.3000 4,917,300
7.5800 7.8600 7.4270 7.8100 7,174,200
7.1600 7.7450 6.9600 7.6800 6,295,000
Weekend
Weekend
6.7100 7.3100 6.7000 7.1700 5,974,600
6.6200 6.9500 6.5510 6.7900 3,525,900
6.6200 6.8270 6.3630 6.7400 4,926,300
7.1900 7.2050 6.6800 6.7400 4,569,800
7.0400 7.3100 6.8550 7.2100 4,082,700
Weekend
Weekend
7.4300 7.4300 6.9400 7.1100 4,894,000
7.4800 7.7500 7.2100 7.4400 5,342,900
7.9300 8.0700 7.0500 7.6700 12,903,800
7.7900 8.1600 7.5500 7.7600 8,753,300
8.1500 8.5100 7.6300 7.6900 10,534,300
Weekend
Weekend
8.6000 9.6600 7.6350 8.0600 21,605,600
2 · 10-Q After-hours · 17:07 ET 10-Q ↗ 1 · 8-K After-hours · 16:20 ET 8-K ↗
8.0000 8.0500 7.4300 7.7200 6,779,900
8.3200 8.3600 7.8000 7.9000 8,061,300
7.8100 8.4900 7.6800 8.3200 11,103,500
6.8600 7.7880 6.7600 7.5400 10,053,600
Weekend
Weekend
6.4500 6.5750 6.0700 6.3600 7,131,600
7.1000 7.3300 6.8300 6.9300 6,339,400
7.1700 7.3500 6.8650 7.0100 6,129,200
8.1500 8.1500 7.0800 7.1400 10,119,100
8.2000 8.6450 7.9900 8.2900 7,285,200
Weekend
Weekend
8.2800 8.3450 7.8600 8.2000 6,084,800
8.0650 8.3800 7.7450 8.2900 6,972,800
8.4700 8.5620 7.8100 8.0300 7,979,700
8.2000 8.4700 7.6600 8.1900 12,008,300

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.

19 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:25 ET Summarise
18 8-K/A 8-K/A (opens SEC filing in a new tab) After-hours · 16:40 ET Summarise
17 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:36 ET Summarise
16 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:52 ET Summarise
15 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:11 ET Summarise
14 DEFA14A DEFA14A (opens SEC filing in a new tab) Next filing day · accepted 28 Apr, 18:52 ET Summarise
13 DEF 14A DEF 14A (opens SEC filing in a new tab) Next filing day · accepted 28 Apr, 18:50 ET Summarise
12 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:58 ET Summarise
11 10-K 10-K (opens SEC filing in a new tab) After-hours · 16:21 ET Summarise
10 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:20 ET Summarise
9 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:35 ET Summarise
8 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:36 ET Summarise
7 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:43 ET Summarise
6 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 17:11 ET Summarise
5 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:11 ET Summarise
4 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:38 ET Summarise
3 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:03 ET Summarise
2 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 17:07 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:20 ET Summarise