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Amprius Technologies, Inc.

AMPX Clue Score50
United States Fiscal year ends December CIK 0001899287
9.44
+0.53%
Close, 9 Oct 2026 · USD

Price, with every insider trade on it

Closing prices, 12 months · point at a dot for who traded, or at the line for the close
9.44 on 9 Oct 2026
23 15 8 Oct 2025 Apr 2026 Oct 2026 13 Oct 2025 $12.90 14 Oct 2025 $13.25 15 Oct 2025 $14.61 16 Oct 2025 $12.78 17 Oct 2025 $11.84 20 Oct 2025 $13.53 21 Oct 2025 $12.21 22 Oct 2025 $11.39 23 Oct 2025 $11.66 24 Oct 2025 $12.89 27 Oct 2025 $12.63 28 Oct 2025 $11.90 29 Oct 2025 $12.50 30 Oct 2025 $12.29 31 Oct 2025 $14.09 3 Nov 2025 $13.56 4 Nov 2025 $12.10 5 Nov 2025 $13.04 6 Nov 2025 $11.26 7 Nov 2025 $12.73 10 Nov 2025 $13.59 11 Nov 2025 $12.92 12 Nov 2025 $12.37 13 Nov 2025 $11.72 14 Nov 2025 $11.29 17 Nov 2025 $10.43 18 Nov 2025 $10.67 19 Nov 2025 $10.81 20 Nov 2025 $10.30 21 Nov 2025 $10.11 24 Nov 2025 $10.80 25 Nov 2025 $10.73 26 Nov 2025 $10.81 28 Nov 2025 $11.32 1 Dec 2025 $10.61 2 Dec 2025 $10.86 3 Dec 2025 $11.52 4 Dec 2025 $12.22 5 Dec 2025 $12.18 8 Dec 2025 $11.80 9 Dec 2025 $11.70 10 Dec 2025 $11.04 11 Dec 2025 $11.44 12 Dec 2025 $10.91 15 Dec 2025 $10.05 16 Dec 2025 $10.28 17 Dec 2025 $8.78 18 Dec 2025 $9.15 19 Dec 2025 $9.35 22 Dec 2025 $9.07 23 Dec 2025 $8.72 24 Dec 2025 $8.53 26 Dec 2025 $8.27 29 Dec 2025 $7.92 30 Dec 2025 $7.83 31 Dec 2025 $7.89 2 Jan 2026 $8.74 5 Jan 2026 $9.21 6 Jan 2026 $9.19 7 Jan 2026 $8.90 8 Jan 2026 $9.24 9 Jan 2026 $9.48 12 Jan 2026 $10.01 13 Jan 2026 $9.67 14 Jan 2026 $10.36 15 Jan 2026 $10.15 16 Jan 2026 $11.00 20 Jan 2026 $11.17 21 Jan 2026 $11.27 22 Jan 2026 $11.95 23 Jan 2026 $11.17 26 Jan 2026 $10.90 27 Jan 2026 $11.58 28 Jan 2026 $11.98 29 Jan 2026 $13.58 30 Jan 2026 $12.44 2 Feb 2026 $13.15 3 Feb 2026 $14.68 4 Feb 2026 $12.40 5 Feb 2026 $10.58 6 Feb 2026 $12.24 9 Feb 2026 $12.49 10 Feb 2026 $11.55 11 Feb 2026 $11.11 12 Feb 2026 $10.19 13 Feb 2026 $9.97 17 Feb 2026 $9.77 18 Feb 2026 $9.91 19 Feb 2026 $10.35 20 Feb 2026 $9.52 23 Feb 2026 $10.20 24 Feb 2026 $10.80 25 Feb 2026 $11.06 26 Feb 2026 $11.52 27 Feb 2026 $10.73 2 Mar 2026 $11.59 3 Mar 2026 $11.63 4 Mar 2026 $12.55 5 Mar 2026 $14.89 6 Mar 2026 $16.33 9 Mar 2026 $17.72 10 Mar 2026 $18.00 11 Mar 2026 $18.59 12 Mar 2026 $18.29 13 Mar 2026 $17.95 16 Mar 2026 $18.69 17 Mar 2026 $19.38 18 Mar 2026 $18.90 19 Mar 2026 $19.11 20 Mar 2026 $18.20 23 Mar 2026 $18.68 24 Mar 2026 $17.76 25 Mar 2026 $17.93 26 Mar 2026 $17.16 27 Mar 2026 $16.12 30 Mar 2026 $14.72 31 Mar 2026 $16.86 1 Apr 2026 $15.52 2 Apr 2026 $16.00 6 Apr 2026 $17.56 7 Apr 2026 $16.70 8 Apr 2026 $16.92 9 Apr 2026 $16.15 10 Apr 2026 $17.22 13 Apr 2026 $18.39 14 Apr 2026 $17.89 15 Apr 2026 $18.30 16 Apr 2026 $19.13 17 Apr 2026 $18.67 20 Apr 2026 $19.61 21 Apr 2026 $21.43 22 Apr 2026 $22.69 23 Apr 2026 $21.73 24 Apr 2026 $20.66 27 Apr 2026 $21.42 28 Apr 2026 $19.69 29 Apr 2026 $20.34 30 Apr 2026 $21.06 1 May 2026 $20.87 4 May 2026 $20.38 5 May 2026 $21.40 6 May 2026 $22.19 7 May 2026 $16.11 8 May 2026 $16.70 11 May 2026 $17.68 12 May 2026 $18.83 13 May 2026 $17.52 14 May 2026 $17.87 15 May 2026 $16.85 18 May 2026 $15.87 19 May 2026 $15.48 20 May 2026 $15.07 21 May 2026 $15.30 22 May 2026 $16.03 26 May 2026 $17.83 27 May 2026 $17.16 28 May 2026 $20.85 29 May 2026 $20.28 1 Jun 2026 $21.75 2 Jun 2026 $22.91 3 Jun 2026 $21.74 4 Jun 2026 $22.54 5 Jun 2026 $19.69 8 Jun 2026 $18.83 9 Jun 2026 $17.42 10 Jun 2026 $16.43 11 Jun 2026 $17.10 12 Jun 2026 $16.31 15 Jun 2026 $16.82 16 Jun 2026 $15.49 17 Jun 2026 $15.00 18 Jun 2026 $16.17 22 Jun 2026 $15.65 23 Jun 2026 $14.12 24 Jun 2026 $12.52 25 Jun 2026 $12.56 26 Jun 2026 $12.91 29 Jun 2026 $13.52 30 Jun 2026 $13.86 1 Jul 2026 $13.59 2 Jul 2026 $12.38 6 Jul 2026 $13.09 7 Jul 2026 $11.72 8 Jul 2026 $11.58 9 Jul 2026 $11.88 10 Jul 2026 $11.53 13 Jul 2026 $11.08 14 Jul 2026 $11.12 15 Jul 2026 $11.34 16 Jul 2026 $10.10 17 Jul 2026 $10.16 20 Jul 2026 $10.14 21 Jul 2026 $10.88 22 Jul 2026 $10.17 23 Jul 2026 $9.91 24 Jul 2026 $9.24 27 Jul 2026 $9.71 28 Jul 2026 $9.13 29 Jul 2026 $8.44 30 Jul 2026 $9.47 31 Jul 2026 $9.60 3 Aug 2026 $10.12 4 Aug 2026 $10.81 5 Aug 2026 $11.72 6 Aug 2026 $11.19 7 Aug 2026 $11.85 10 Aug 2026 $11.81 11 Aug 2026 $12.08 12 Aug 2026 $12.24 13 Aug 2026 $11.94 14 Aug 2026 $12.51 17 Aug 2026 $11.58 18 Aug 2026 $10.71 19 Aug 2026 $10.63 20 Aug 2026 $10.20 21 Aug 2026 $10.34 24 Aug 2026 $9.86 25 Aug 2026 $10.18 26 Aug 2026 $10.20 27 Aug 2026 $10.51 28 Aug 2026 $9.89 31 Aug 2026 $9.88 1 Sep 2026 $9.48 2 Sep 2026 $9.52 3 Sep 2026 $9.63 4 Sep 2026 $9.89 8 Sep 2026 $10.39 9 Sep 2026 $9.87 10 Sep 2026 $9.55 11 Sep 2026 $9.44 14 Sep 2026 $9.17 15 Sep 2026 $9.16 16 Sep 2026 $9.10 17 Sep 2026 $9.54 18 Sep 2026 $9.50 21 Sep 2026 $9.61 22 Sep 2026 $9.98 23 Sep 2026 $9.73 24 Sep 2026 $9.69 25 Sep 2026 $9.75 28 Sep 2026 $9.60 29 Sep 2026 $9.53 30 Sep 2026 $9.68 1 Oct 2026 $9.61 2 Oct 2026 $9.67 5 Oct 2026 $9.45 6 Oct 2026 $9.47 7 Oct 2026 $9.33 8 Oct 2026 $9.39 9 Oct 2026 $9.44 Sun Kang Chief Executive Officer Sold at will $10.60M 17 Nov 2025 · at $10.60 · 40.4% of stake Stefan Constantin Ionel Chief Technology Officer Sold at will $252.27K 21 Nov 2025 · at $10.08 · 3.0% of stake Sun Kang Chief Executive Officer Sold at will $692.13K 21 Nov 2025 · at $10.08 · 4.7% of stake Stefan Constantin Ionel Chief Technology Officer Sold at will $2.08M 11 Dec 2025 · at $10.51 · 20.9% of stake Sun Kang Director Sold at will $5.11M 12 Jan 2026 · at $10.10 · 26.5% of stake Sun Kang Director Sold at will $10.52M 16 Jan 2026 · at $11.07 · 40.4% of stake Sun Kang Director Sold at will $476.27K 20 Jan 2026 · at $11.03 · 3.0% of stake Stefan Constantin Ionel Chief Technology Officer Sold at will $879.41K 21 Jan 2026 · at $12.00 · 8.9% of stake Stefan Constantin Ionel Chief Technology Officer Sold at will $5.93M 22 Jan 2026 · at $12.04 · 39.7% of stake Stefan Constantin Ionel Chief Technology Officer Sold at will $19.20K 23 Jan 2026 · at $12.00 · 0.2% of stake Stefan Constantin Ionel Chief Technology Officer Sold at will $476.35K 28 Jan 2026 · at $12.00 · 5.0% of stake Stefan Constantin Ionel Chief Technology Officer Sold at will $257.60K 23 Feb 2026 · at $10.16 · 3.4% of stake Sun Kang Director Sold at will $622.03K 23 Feb 2026 · at $10.16 · 4.4% of stake Chu Steven Director Sold at will $2.99M 10 Mar 2026 · at $17.92 · 56.7% of stake Chu Steven Director Sold at will $2.88M 12 Mar 2026 · at $18.50 · 55.0% of stake HSIEH Wen Hsuan Director Sold at will $7.62M 12 Mar 2026 · at $18.44 · 90.3% of stake Sun Kang Director Sold at will $4.10M 23 Mar 2026 · at $18.80 · 79.4% of stake Sun Kang Director Sold at will $23.86M 1 Apr 2026 · at $15.91 · 52.8% of stake Stefan Constantin Ionel Chief Technology Officer Sold at will $426.08K 21 May 2026 · at $14.79 · 3.5% of stake Stepien Thomas M Chief Executive Officer Sold at will $897.69K 21 May 2026 · at $14.79 · 8.0% of stake Sun Kang Director Sold at will $1.00M 21 May 2026 · at $14.79 · 5.0% of stake DIXON DONALD R Director Sold at will $320.25K 26 May 2026 · at $17.90 · 3.6% of stake Sun Kang Director Sold at will $6.12K 27 May 2026 · at $17.19 · 0.0% of stake Stefan Constantin Ionel Chief Technology Officer Sold at will $55.16K 27 May 2026 · at $17.19 · 0.4% of stake Stepien Thomas M Chief Executive Officer Sold at will $75.22K 27 May 2026 · at $17.19 · 0.6% of stake Stepien Thomas M Chief Executive Officer Sold at will $41.94K 4 Jun 2026 · at $20.97 · 0.3% of stake DIXON DONALD R Director Sold at will $765.20K 9 Jun 2026 · at $19.13 · 8.3% of stake DIXON DONALD R Director Sold at will $1.46M 15 Jun 2026 · at $17.17 · 19.1% of stake Stepien Thomas M Chief Executive Officer Sold at will $243.31K 21 Aug 2026 · at $10.34 · 3.8% of stake Stefan Constantin Ionel Chief Technology Officer Sold at will $306.93K 21 Aug 2026 · at $10.34 · 3.7% of stake Sun Kang Director Sold at will $642.19K 21 Aug 2026 · at $10.34 · 4.8% of stake Stepien Thomas M Chief Executive Officer Sold at will $80.24K 24 Aug 2026 · at $10.03 · 1.3% of stake
0 buys32 sales at will0 planned sales

Key numbers

Fiscal year 2025, ended 31 Dec 2025, as filed
Revenue
$71.91M
Net income
$44.02M
Free cash flow
$35.53M
Gross margin
11.5%
Operating margin
-64.9%
Net margin
-61.2%
Return on equity
-42.4%
Return on capital
-35.5%
Revenue growth, 1 yr
205.1%

Revenue and net income

Fiscal years, as filed with the SEC · point at a year for the detail
3M -10M FY21 Fiscal year 2021 Revenue $2.77M Net income $9.90M Margin -357.0% 4M -17M FY22 Fiscal year 2022 Revenue $4.41M Net income $17.33M Margin -393.1% · growth +59.1% 9M -37M FY23 Fiscal year 2023 Revenue $8.79M Net income $36.78M Margin -418.3% · growth +99.4% 24M -45M FY24 Fiscal year 2024 Revenue $23.57M Net income $44.67M Margin -189.5% · growth +168.1% 72M -44M FY25 Fiscal year 2025 Revenue $71.91M Net income $44.02M Margin -61.2% · growth +205.1%
RevenueNet incomeLoss

Latest insider transactions

From Form 4, most recent first
All of them →
DateInsiderTypeValueOf own stake
24 Aug 2026 Stepien Thomas M
Chief Executive Officer
Sold at will $80.24K 1.3%
21 Aug 2026 Sun Kang
Director
Sold at will $642.19K 4.8%
21 Aug 2026 Stefan Constantin Ionel
Chief Technology Officer
Sold at will $306.93K 3.7%
21 Aug 2026 Stepien Thomas M
Chief Executive Officer
Sold at will $243.31K 3.8%
15 Jun 2026 DIXON DONALD R
Director
Sold at will $1.46M 19.1%
9 Jun 2026 DIXON DONALD R
Director
Sold at will $765.20K 8.3%