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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
2026-08-24 Stepien Thomas M Chief Executive Officer Sale −8,000 $10.03 $80K 594,096
2026-08-21 Stepien Thomas M Chief Executive Officer Sale −23,529 $10.34 $243K 602,096
2026-08-21 Stefan Constantin Ionel Chief Technology Officer Sale −29,681 $10.34 $307K 771,629
2026-08-21 Sun Kang Director Sale −62,101 $10.34 $642K 1,218,397
2026-06-15 DIXON DONALD R Director Sale −85,000 $17.17 $1.5M 359,380
2026-06-09 DIXON DONALD R Director Sale −40,000 $19.13 $765K 444,380
2026-06-04 Stepien Thomas M Chief Executive Officer Sale −2,000 $20.97 $42K 625,625
2026-05-27 Stepien Thomas M Chief Executive Officer Sale −4,375 $17.19 $75K 694,923
2026-05-27 Stefan Constantin Ionel Chief Technology Officer Sale −3,208 $17.19 $55K 801,310
2026-05-27 Sun Kang Director Sale −356 $17.19 $6K 1,280,498
2026-05-26 DIXON DONALD R Director Sale −17,895 $17.90 $320K 484,380
2026-05-21 Stepien Thomas M Chief Executive Officer Sale −60,702 $14.79 $898K 699,298
2026-05-21 Stefan Constantin Ionel Chief Technology Officer Sale −28,812 $14.79 $426K 804,518
2026-05-21 Sun Kang Director Sale −67,796 $14.79 $1.0M 1,280,854
2026-04-01 Sun Kang Director Sale −1,250,963 $15.73 $19.7M 1,591,437
2026-04-01 Sun Kang Director Sale −249,037 $16.78 $4.2M 1,342,400
2026-03-23 Sun Kang Director Sale −152,823 $18.69 $2.9M 121,452
2026-03-23 Sun Kang Director Sale −65,046 $19.06 $1.2M 56,406
2026-03-12 HSIEH Wen Hsuan Director Sale −282,500 $18.55 $5.2M 175,090
2026-03-12 HSIEH Wen Hsuan Director Sale −130,646 $18.22 $2.4M 44,444

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