Amprius Technologies, Inc. filings document operating results, material events, governance matters and capital-structure disclosures for a public battery technology company. Its 8-K reports include quarterly and annual financial-result releases, material agreement updates, auditor changes, lease-related matters, and equity offering activity.
Amprius disclosure records also cover proxy and shareholder voting matters, emerging growth company status, common stock, redeemable warrants, and board and executive compensation topics. These filings provide the formal record for the company's silicon-anode battery business, security structure, financing activity, risk disclosures and corporate governance practices.
Amprius Technologies director Sun Kang, through the KANG & CECILLIA SUN FAMILY REVOCABLE TRUST, reported open-market sales of a total of 217,869 shares of common stock on March 23, 2026. The shares were sold in two tranches at average prices of $18.6863 and $19.0589, with individual trade prices ranging from $17.89 to $19.36. These transactions were executed under a pre-arranged Rule 10b5-1 trading plan adopted on August 18, 2025. Following the sales, the trust held 56,406 shares indirectly, while Kang also held 1,342,400 shares directly, including 1,159,385 restricted stock units subject to vesting conditions.
AMPX notice of proposed sale: 192,727 shares of Common stock (listed as Restricted Stock Units) are presented for resale. The filing lists multiple 10b5-1 sales by KANG SUN, including sales of 950,548, 506,267, 61,251, and 43,185 shares on various dates in January–February 2026.
Transactions are reported as 10b5-1 plan sales; cash‑flow treatment and further qualifiers are those shown in the excerpt.
RODRIGUEZ RICARDO C. reported acquisition or exercise transactions in this Form 4 filing.
Amprius Technologies, Inc. reported that its Chief Financial Officer, Ricardo C. Rodriguez, received a grant of 150,000 shares of common stock on March 4, 2026 at a price of $0.00 per share. Following this equity award, he directly owns 350,000 shares.
This amended filing corrects the vesting schedule for the previously reported restricted stock units. According to the updated terms, 3/16 of the shares will vest on November 20, 2026, with additional portions vesting quarterly on February 20, May 20, August 20 and November 20 until the award is fully vested on February 20, 2030, subject to his continued service.
Amprius Technologies director Wen Hsuan Hsieh reported an exercise-and-sell transaction in company stock. Hsieh exercised stock options for 270,251 shares of common stock at $2.61 per share, converting a derivative award into directly held shares.
On the same date, Hsieh then sold 282,500 shares of common stock at an average price of $18.546 per share and a further 130,646 shares at an average price of $18.2232 per share in open-market transactions. After these trades, Hsieh reported ownership of 44,444 shares, all in the form of restricted stock units that represent the right to receive common shares if vesting conditions are met.
Amprius Technologies director Steven Chu reported a combination of option exercises and share sales. On March 10 and 12, 2026, he exercised stock options covering 259,697 shares of common stock at exercise prices of $0.62 and $2.61 per share.
Over the same two days, he sold 322,197 shares of common stock in open-market transactions at average prices reported between $17.90 and $18.78 per share. Following these transactions, Chu directly holds 127,339 shares of Amprius common stock, including 44,444 restricted stock units that will settle in shares if vesting conditions are met.
AMPX filed a Form 144 notice reporting proposed sales of Common Stock tied to option exercises on 03/12/2026.
The notice lists proposed sales of 86,143 and 69,422 shares on 03/12/2026 associated with exercises under a registered plan. It also records a prior sale of 166,632 shares on 03/10/2026 by Steven Chu for $2,985,428.90.
AMPX insider reported a proposed sale of 270,251 shares of Common stock on 03/12/2026. The filing lists the sale as resulting from an exercise of options under a registered plan for cash.
The filing also lists restricted stock vesting events of 17,895 shares (vested 06/09/2024) and 125,000 shares (vested 06/07/2025) as context for the position change.
AMPX reported proposed sales of Common Stock under registered plans. The filing lists 62,500 shares associated with restricted stock vesting on 06/07/2025 and 104,132 shares from an exercise of options on 03/10/2026, each described as "under a registered plan" and shown as sales by the issuer.
Amprius Technologies, Inc. reported that Chief Financial Officer Ricardo C. Rodriguez acquired 150,000 restricted stock units, each representing one share of common stock, at a price of $0.00 per unit. These units vest 1/16 starting on May 20, 2026 and quarterly thereafter until fully vested on February 20, 2030, subject to continued service. Following this award, he holds 350,000 restricted stock units in total.
Amprius Technologies, Inc. reported that Chief Executive Officer Thomas M. Stepien acquired 150,000 shares of common stock in the form of restricted stock units on March 4, 2026, at a price of $0.00 per share.
Each restricted stock unit represents the right to receive one share of common stock. According to the vesting schedule, 1/16 of the shares subject to the award will vest on May 20, 2026 and then quarterly on each August 20, November 20, February 20 and May 20, subject to his continued service, until the award is fully vested on February 20, 2030.
Following this grant, Stepien directly holds a total of 760,000 shares of common stock, which includes 750,000 restricted stock units that each represent a contingent right to receive one share, subject to their applicable vesting schedules and conditions.