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CIK 0001899287 · Non-accelerated filer<br>Smaller reporting company<br>Emerging growth company

Amprius Technologies, Inc.

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Ticker
AMPX
Exchange
NYSE
Industry
Miscellaneous Electrical Machinery, Equipment & Supplies
FY end
Dec 31
Incorporated
DE
Entity type
operating
EIN
981591811
Phone
(800) 425-8803
Business address
1180 PAGE AVENUE, FREMONT, CA, 94538
Former names
Kensington Capital Acquisition Corp. IV

Securities

  • AMPX Amprius Technologies, Inc. Common Stock NYSE
  • AMPX-WT Warrants NYSE
Open-market buys, last 90 days
$0
in 0 filings
Open-market sales, last 90 days
$1,272,671
in 3 filings

Net −$1,272,671. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Pace of trading Bought Sold

Who's trading

90 days

  1. Sun Kang −$642K Director sold 5% of stake
  2. Stepien Thomas M −$324K Chief Executive Officer sold 5% of stake
  3. Stefan Constantin Ionel −$307K Chief Technology Officer sold 4% of stake
Date Insider Transaction Shares Price Value Owned after
2026-01-23 Stefan Constantin Ionel Chief Technology Officer Option exercise +1,600 $0.05 $80 750,296
2026-01-23 Stefan Constantin Ionel Chief Technology Officer Sale −1,600 $12.00 $19K 748,696
2026-01-23 Stefan Constantin Ionel Chief Technology Officer Option exercise · Stock Option (right to buy) −1,600 39,600
2026-01-22 Stefan Constantin Ionel Chief Technology Officer Option exercise +253,928 $0.05 $13K 1,002,624
2026-01-22 Stefan Constantin Ionel Chief Technology Officer Option exercise +72,795 $0.45 $33K 1,075,419
2026-01-22 Stefan Constantin Ionel Chief Technology Officer Option exercise +166,104 $0.05 $8K 1,241,523
2026-01-22 Stefan Constantin Ionel Chief Technology Officer Sale −492,827 $12.04 $5.9M 748,696
2026-01-22 Stefan Constantin Ionel Chief Technology Officer Option exercise · Stock Option (right to buy) −253,928 41,200
2026-01-22 Stefan Constantin Ionel Chief Technology Officer Option exercise · Stock Option (right to buy) −72,795 0
2026-01-22 Stefan Constantin Ionel Chief Technology Officer Option exercise · Stock Option (right to buy) −166,104 0
2026-01-21 Stefan Constantin Ionel Chief Technology Officer Option exercise +41,563 $0.62 $26K 790,259
2026-01-21 Stefan Constantin Ionel Chief Technology Officer Option exercise +15,834 $0.05 $792 806,093
2026-01-21 Stefan Constantin Ionel Chief Technology Officer Option exercise +15,883 $0.05 $794 821,976
2026-01-21 Stefan Constantin Ionel Chief Technology Officer Sale −73,280 $12.00 $879K 748,696
2026-01-21 Stefan Constantin Ionel Chief Technology Officer Option exercise · Stock Option (right to buy) −41,563 90
2026-01-21 Stefan Constantin Ionel Chief Technology Officer Option exercise · Stock Option (right to buy) −15,834 295,128
2026-01-21 Stefan Constantin Ionel Chief Technology Officer Option exercise · Stock Option (right to buy) −15,883 166,104
2026-01-20 Sun Kang Director Option exercise +43,185 $1.78 $77K 1,446,836
2026-01-20 Sun Kang Director Sale −43,185 $11.03 $476K 1,403,651
2026-01-20 Sun Kang Director Option exercise · Stock Option (right to buy) −43,185 1,312,505

Page 4 of 16 · 317 trades