Kathleen A. Bayless - 12 Jun 2026 Form 4 Insider Report for Amprius Technologies, Inc. (AMPX)

Reporting relationship: Director
Issuer ticker: AMPX
Reported as of: 12 Jun 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 16 Jun 2026, 18:03:05 UTC
Prior SEC filing: 11 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Ricardo C. Rodriguez, attorney-in-fact on behalf of Kathleen Bayless

Key filing fact

Kathleen A. Bayless filed Form 4 for Amprius Technologies, Inc. (AMPX) on 16 Jun 2026.

Key facts

This page summarizes Kathleen A. Bayless's Form 4 filing for Amprius Technologies, Inc. (AMPX).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 16 Jun 2026, 18:03.

Change

Previous filing in this sequence was filed on 11 May 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001230569 Primary reporting owner

BAYLESS KATHLEEN A

Relationship: Director
Address: 1180 PAGE AVE, FREMONT
Signature: /s/ Ricardo C. Rodriguez, attorney-in-fact on behalf of Kathleen Bayless
Signature date: 16 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

AMPX transaction

Common stock

Award

Transaction value
Shares: +10,423
Change %: +5.1%
Price: $0.000000^*
Shares after: 216,120
Date: 12 Jun 2026
Ownership: Direct
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote 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.

Footnote 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.

SEC remarks

Exhibit 24-Power of Attorney