Sun Kang 4

4 · Amprius Technologies, Inc. · Filed Mar 24, 2026

AI-generated summary of this filing

Updated Mar 24, 2026

Amprius (AMPX) Director Sun Kang Sells $4.10M of Shares

What Happened

Sun Kang, a director of Amprius Technologies, sold a total of 217,869 shares in open-market transactions on March 23, 2026. The filing shows two reported dispositions: 152,823 shares at an average price of $18.69 (proceeds $2,855,696) and 65,046 shares at an average price of $19.06 (proceeds $1,239,705), for combined proceeds of $4,095,401. These transactions are reported as sales (S) and were effected pursuant to a Rule 10b5-1 trading plan.

Key Details

Transaction date: 2026-03-23; Form filed: 2026-03-24 (timely filing).
Reported average prices and ranges:
- 152,823 shares — avg $18.69; executed across prices ranging from $17.89 to $18.88 (report offers to provide breakdown on request).
- 65,046 shares — avg $19.06; executed across prices ranging from $18.89 to $19.36 (report offers to provide breakdown on request).
Shares owned after transaction: the filing excerpt does not state a total post-transaction common stock balance. It does note 1,159,385 restricted stock units (RSUs) held, each convertible to one share subject to vesting (F5).
Holding vehicle: the sold securities were held directly by the KANG & CECILLIA SUN FAMILY REVOCABLE TRUST, for which the reporting person and his spouse are co-trustees (F3).
Plan/authorization: sales were made under a 10b5-1 plan adopted August 18, 2025 (F1).
Transaction type code: S = Sale.

Context

These are planned sales under a 10b5-1 program, which typically executes pre-set instructions and can represent routine disposition rather than a real-time market view; the filing is factual and does not disclose motives.
Purchases by insiders are generally considered more directly bullish than planned sales; here the activity is sales-only.

Form 4

Period: 2026-03-23

Director

Transactions

Sale
Common stock
[F1][F2][F3]
2026-03-23$18.69/sh−152,823$2,855,696→ 121,452 total(indirect: See Footnote)
Sale
Common stock
[F1][F4][F3]
2026-03-23$19.06/sh−65,046$1,239,705→ 56,406 total(indirect: See Footnote)

Holdings

Footnotes (5)

[F1]The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2025.
[F2]The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $17.89 to $18.88, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.
[F3]These securities are held directly by the KANG & CECILLIA SUN FAMILY REVOCABLE TRUST, for which the reporting person and his spouse are co-trustees.
[F4]The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $18.89 to $19.36, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.
[F5]Includes 1,159,385 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.

Signature

/s/ Ricardo C. Rodriguez, attorney-in-fact on behalf of Kang Sun|2026-03-24

1 file