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Amprius Technologies AMPX

Amprius Technologies, Inc. · NYSE · Miscellaneous Electrical Machinery, Equipment & Supplies · also AMPX-WT

$9.16+3.15%close on Oct. 28, 2026 · volume 4.3M · Yahoo Finance

Price, last 47 sessions

$8.00$9.00$10.00Sept. 2026Oct. 2026
Aug. 24, 2026 to Oct. 28, 2026 · high $10.51 · low $7.58 · SEC filing, placed when SEC released it

Our coverage

Nothing published yet.

Insider buying and selling

DateInsiderTradeSharesAvg. priceValue
Aug. 24, 2026Thomas M. Stepien
Chief Executive Officer, director
Sold8,000$10.03$80,240
Aug. 21, 2026Kang Sun
director
Sold62,101$10.34$642,186
Aug. 21, 2026Constantin Ionel Stefan
Chief Technology Officer
Sold29,681$10.34$306,931
Aug. 21, 2026Thomas M. Stepien
Chief Executive Officer, director
Sold23,529$10.34$243,313

Open-market purchases and sales reported on SEC Form 4 filed since July 24, 2026; grants, option exercises and shares withheld for tax aren't shown. A trade under a 10b5-1 plan was scheduled in advance. Where a filing was amended, the amendment's figures are shown.

Recent SEC filings

All 9 →
  • 8-KSept. 25, 2026, 8:54 p.m. ETView on SEC.gov

    Entry into a material definitive agreement · Financial statements and exhibits

  • 4Aug. 25, 2026, 5:21 p.m. ETView on SEC.gov
  • 4Aug. 25, 2026, 5:22 p.m. ETView on SEC.gov
  • 4Aug. 25, 2026, 5:22 p.m. ETView on SEC.gov
  • 8-KAug. 13, 2026, 4:49 p.m. ETView on SEC.gov

    Entry into a material definitive agreement · Creation of a direct financial obligation · Financial statements and exhibits

  • SCHEDULE 13G/AAug. 10, 2026, 4:13 p.m. ETView on SEC.gov
  • 10-QAug. 6, 2026, 4:22 p.m. ETView on SEC.gov
  • 8-KAug. 4, 2026, 4:15 p.m. ETView on SEC.gov

    Results of operations and financial condition · Financial statements and exhibits