Amprius Technologies, Inc.

AMPX · Industrials · Amprius Technologies, Inc. develops, manufactures, and markets lithium-ion batteries for mobility applications

Amprius Technologies, Inc. (AMPX), in the Industrials sector, has 23 disclosed filings on Paydirt over the trailing twelve months from 6 corporate insiders: 0 purchases and 23 sales. Filers took a median of 2 days from execution to disclosure, and the most recent trade was executed Aug 21 and filed Aug 25. The most active filer was Kang Sun with 12 filings.

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Filings, ttm

0 buys · 23 sells

Traders, ttm

6 insiders

Volume, ttmiDollar value disclosed in the window

$85.4M

estimated for Congress, as filed for insiders

Median delay

execution to disclosure

Last traded

Aug 21

Filed Aug 25

ADViAverage daily dollar volume

$72.5M

market data

Share price · 12M

$9.89 (-18.0%)

Adjusted for splits and dividends.

Volume by month

Buys $0 Sells $86.7M

Estimated for Congress, as filed for insiders · by filing month · past 24 months

Who filed

Kang Sun Director 12 filings CS

Constantin Ionel Stefan Chief Technology Officer 8 filings DD

Donald R Dixon Director 3 filings TS

Thomas M Stepien Chief Executive Officer 2 filings JB

Jonathan Bornstein President of Amprius Lab 1 filing SC

Steven Chu Director 1 filing WH

Wen Hsuan HSIEH Director 1 filing SW

Sandra Wallach Chief Financial Officer 1 filing

Recent filings

Kang SunSALE Director $642K
62,101 sh × $10.34
Exec Aug 21
Filed Aug 25 · 5:22 PM ET Constantin Ionel StefanSALE Chief Technology Officer $307K
29,681 sh × $10.34
Exec Aug 21
Filed Aug 25 · 5:22 PM ET Thomas M StepienSALE Chief Executive Officer $243K
23,529 sh × $10.34
Exec Aug 21
Filed Aug 25 · 5:21 PM ET Donald R DixonSALE Director $1.5M
85,000 sh × $17.17
Exec Jun 15
Filed Jun 16 · 5:30 PM ET Donald R DixonSALE Director $765K
40,000 sh × $19.13
Exec Jun 9
Filed Jun 11 · 5:30 PM ET Donald R DixonSALE Director $320K
17,895 sh × $17.90
Exec May 26
Filed May 28 · 5:30 PM ET Thomas M StepienSALE Chief Executive Officer $898K
60,702 sh × $14.79
Exec May 21
Filed May 26 · 5:30 PM ET Constantin Ionel StefanSALE Chief Technology Officer $426K
28,812 sh × $14.79
Exec May 21
Filed May 26 · 5:30 PM ET Kang SunSALE Director $1.0M
67,796 sh × $14.79
Exec May 21
Filed May 26 · 5:30 PM ET Kang SunSALE Director $23.9M
1,500,000 sh across 2 lots
Exec Apr 1
Filed Apr 2 · 5:30 PM ET Kang SunSALE Director $4.1M
217,869 sh across 2 lots
Exec Mar 23
Filed Mar 24 · 5:30 PM ET Wen Hsuan HSIEHSALE Director $7.6M
413,146 sh across 2 lots
Exec Mar 12
Filed Mar 13 · 5:30 PM ET Steven ChuSALE Director $5.9M
322,197 sh across 4 lots
Exec Mar 10
Filed Mar 12 · 5:30 PM ET Constantin Ionel StefanSALE Chief Technology Officer $258K
25,366 sh × $10.16
Exec Feb 23
Filed Feb 24 · 5:30 PM ET Kang SunSALE Director $622K
61,251 sh × $10.16
Exec Feb 23
Filed Feb 24 · 5:30 PM ET Constantin Ionel StefanSALE Chief Technology Officer $476K
39,690 sh × $12.00
Exec Jan 28
Filed Jan 30 · 5:30 PM ET Constantin Ionel StefanSALE Chief Technology Officer $6.8M
566,107 sh across 2 lots
Exec Jan 21
Filed Jan 23 · 5:30 PM ET Kang SunSALE Director $11.0M
993,733 sh across 2 lots
Exec Jan 16
Filed Jan 20 · 5:30 PM ET Kang SunSALE Director $5.1M
506,267 sh × $10.10
Exec Jan 12
Filed Jan 14 · 5:30 PM ET Constantin Ionel StefanSALE Chief Technology Officer $2.1M
198,255 sh × $10.51
Exec Dec 11 2025
Filed Dec 15 2025 · 5:30 PM ET Kang SunSALE Chief Executive Officer $692K
68,655 sh × $10.08
Exec Nov 21 2025
Filed Nov 25 2025 · 5:30 PM ET Constantin Ionel StefanSALE Chief Technology Officer $252K
25,024 sh × $10.08
Exec Nov 21 2025
Filed Nov 25 2025 · 5:30 PM ET Kang SunSALE Chief Executive Officer $10.6M
1,000,000 sh × $10.60
Exec Nov 17 2025
Filed Nov 19 2025 · 5:30 PM ET Kang SunSALE Chief Executive Officer $448K
65,654 sh × $6.82
Exec Aug 21 2025
Filed Aug 25 2025 · 5:30 PM ET Sandra WallachSALE Chief Financial Officer $194K
28,390 sh × $6.82
Exec Aug 21 2025
Filed Aug 25 2025 · 5:30 PM ET