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BCS

Changes in Beneficial Ownership · 4

Amprius Technologies, Inc.

AMPXNYSEEQUITYCurrent

Changes in Beneficial Ownership

Filed Jun 16, 2026Accepted Jun 16, 2026, 6:03 PM EDTFiling CIK 1899287Accession 0001230569-26-000005
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Structured filing — 4

wk-form4_1781647381.xml

Open full document ↗

Filing details

Report period
2026-06-12
Issuer
Amprius Technologies, Inc.
Issuer CIK
0001899287
Trading symbol
AMPX

Reporting owner 1

Name
BAYLESS KATHLEEN A
Reporting owner CIK
0001230569
Relationship
Director
Address
1180 PAGE AVE, FREMONT, CA, 94538

Non-derivative transactions

Non-derivative transactions · 1 reported row
SecurityTransaction dateCodeAmountA / DPrice (USD)Owned afterOwnership
Common stock2026-06-12A · Form 410,423[F1]A0216,120[F2]D
Table key
A · Form 4
Acquisition by grant, award or otherwise under Rule 16b-3(d)
A
Acquired
D
Direct

Footnotes

F1
The securities are represented by restricted stock units. Each restricted stock unit represents the reporting person's right to receive one share of issuer's common stock. 100% of the restricted stock units vest on the earlier of (i) the one-year anniversary of the date the restricted stock units were granted and (ii) the day before the next annual meeting of stockholders, subject to the reporting person's continued service as of the vesting date.↩ 1
F2
Includes 10,423 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.↩ 1

Remarks

Exhibit 24-Power of Attorney

Signature 1

Signed
/s/ Ricardo C. Rodriguez, attorney-in-fact on behalf of Kathleen Bayless
Date
2026-06-16

Filed exhibits

Company context

Amprius Technologies, Inc. is a leader in advanced lithium-ion battery technology, delivering high-energy and high-power silicon-anode batteries with up to twice the energy density, range, and flight time of conventional graphite-based cells. Headquartered in Fremont, California, Amprius operates an R&D lab and pilot manufacturing facility for silicon anodes and cells. To support scalable production, the Company employs a contract manufacturing strategy, enabling rapid capacity expansion with minimal capital investment. Committed to driving innovation in energy storage, Amprius powers next-generation applications in aerospace, defense, and mobility. For additional information, please visit amprius.com and the Company’s LinkedIn page.

Current securities

Historical securities (3)

Recent company filings

  1. S-3ASR filingOct 9, 2026
  2. Entry into a Material Definitive AgreementSep 28, 2026
  3. 4 filingAug 25, 2026
  4. Entry into a Material Definitive Agreement · Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet ArrangementAug 13, 2026
  5. 10-Q filingAug 6, 2026

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