Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| Amprius Technologies, Inc.AMPX · Entity 4742 | Director · Chief Executive Officer | August 21, 2026 | August 25, 2026 |
Disclosed balances
About these balances
Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.
Amprius Technologies, Inc.
Report date August 21, 2026 · Filed August 25, 2026
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common stockSEC Table I · non-derivative | Direct | 578,750 |
Last balance in matching sequence
After 2026-08-25 transaction · row 6
Source-order balances reconcile. Account continuity and personal attribution are not independently verified.
6 source rowsRow 1 · 2026-08-21 · Sale · Disposed 23,529 · Balance 602,096 F1: This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units. F2: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $10.10 to $10.48, 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: Includes 568,750 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. Row 2 · 2026-08-24 · Sale · Disposed 8,000 · Balance 594,096 F3: Includes 568,750 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. Row 3 · 2026-08-25 · Gift · Disposed 5,000 · Balance 589,096 F4: These transfers were made on the same date as bona fide gifts. F3: Includes 568,750 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. Row 4 · 2026-08-25 · Gift · Disposed 5,000 · Balance 584,096 F4: These transfers were made on the same date as bona fide gifts. F3: Includes 568,750 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. Row 5 · 2026-08-25 · Gift · Disposed 5,000 · Balance 579,096 F4: These transfers were made on the same date as bona fide gifts. F3: Includes 568,750 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. Row 6 · 2026-08-25 · Gift · Disposed 346 · Balance 578,750 F5: These securities were transferred by the reporting person to the Rogers Stepien Family Revocable Trust, for which the reporting person and his spouse are co-trustees. F3: Includes 568,750 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. |
| Common stockSEC Table I · non-derivative | IndirectSee Footnote | 37,260 |
Reported balance
After 2026-08-25 transaction · row 7
Account identity is unresolved; indirect or unspecified ownership is not merged.
1 source rowRow 7 · 2026-08-25 · Grant · Acquired 346 · Balance 37,260 F5: These securities were transferred by the reporting person to the Rogers Stepien Family Revocable Trust, for which the reporting person and his spouse are co-trustees. F6: These securities are held by the Rogers Stepien Family Revocable Trust, for which the reporting person and his spouse are co-trustees. |
Filing footnotes · ownership attribution and instrument terms
F1: This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units.
F2: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $10.10 to $10.48, 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: Includes 568,750 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.
F4: These transfers were made on the same date as bona fide gifts.
F5: These securities were transferred by the reporting person to the Rogers Stepien Family Revocable Trust, for which the reporting person and his spouse are co-trustees.
F6: These securities are held by the Rogers Stepien Family Revocable Trust, for which the reporting person and his spouse are co-trustees.
Transaction history
JSON APIPurchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”
The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.
| Transaction date | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| August 25, 2026 Filed Aug 25, 2026 21:21 UTC | Amprius Technologies, Inc. AMPX · Entity 4742 | GrantCommon stock | 346 | $0.00 | $0.00 |
DisclosureSEC source: 0002067233-26-000019 · wk-form4_1787692877.xml · nonDerivative · entry 7 Stepien Thomas M · CIK 0002067233 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Indirect · See Footnote Disclosed balance after: 37,260 F5 · shares: These securities were transferred by the reporting person to the Rogers Stepien Family Revocable Trust, for which the reporting person and his spouse are co-trustees. F6 · ownership.nature: These securities are held by the Rogers Stepien Family Revocable Trust, for which the reporting person and his spouse are co-trustees. Read SEC document |
| August 25, 2026 Filed Aug 25, 2026 21:21 UTC | Amprius Technologies, Inc. AMPX · Entity 4742 | GiftCommon stock | 346 | $0.00 | $0.00 |
DisclosureSEC source: 0002067233-26-000019 · wk-form4_1787692877.xml · nonDerivative · entry 6 Stepien Thomas M · CIK 0002067233 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 578,750 F5 · shares: These securities were transferred by the reporting person to the Rogers Stepien Family Revocable Trust, for which the reporting person and his spouse are co-trustees. F3 · balance_after: Includes 568,750 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. Read SEC document |
| August 25, 2026 Filed Aug 25, 2026 21:21 UTC | Amprius Technologies, Inc. AMPX · Entity 4742 | GiftCommon stock | 5,000 | $0.00 | $0.00 |
DisclosureSEC source: 0002067233-26-000019 · wk-form4_1787692877.xml · nonDerivative · entry 5 Stepien Thomas M · CIK 0002067233 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 579,096 F4 · shares: These transfers were made on the same date as bona fide gifts. F3 · balance_after: Includes 568,750 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. Read SEC document |
| August 25, 2026 Filed Aug 25, 2026 21:21 UTC | Amprius Technologies, Inc. AMPX · Entity 4742 | GiftCommon stock | 5,000 | $0.00 | $0.00 |
DisclosureSEC source: 0002067233-26-000019 · wk-form4_1787692877.xml · nonDerivative · entry 4 Stepien Thomas M · CIK 0002067233 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 584,096 F4 · shares: These transfers were made on the same date as bona fide gifts. F3 · balance_after: Includes 568,750 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. Read SEC document |
| August 25, 2026 Filed Aug 25, 2026 21:21 UTC | Amprius Technologies, Inc. AMPX · Entity 4742 | GiftCommon stock | 5,000 | $0.00 | $0.00 |
DisclosureSEC source: 0002067233-26-000019 · wk-form4_1787692877.xml · nonDerivative · entry 3 Stepien Thomas M · CIK 0002067233 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 589,096 F4 · shares: These transfers were made on the same date as bona fide gifts. F3 · balance_after: Includes 568,750 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. Read SEC document |
| August 24, 2026 Filed Aug 25, 2026 21:21 UTC | Amprius Technologies, Inc. AMPX · Entity 4742 | SaleCommon stock | 8,000 | $10.03 | $80,240.00 |
DisclosureSEC source: 0002067233-26-000019 · wk-form4_1787692877.xml · nonDerivative · entry 2 Stepien Thomas M · CIK 0002067233 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 594,096 F3 · balance_after: Includes 568,750 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. Read SEC document |
| August 21, 2026 Filed Aug 25, 2026 21:21 UTC | Amprius Technologies, Inc. AMPX · Entity 4742 | SaleCommon stock | 23,529 | $10.34 | $243,313.39 |
DisclosureSEC source: 0002067233-26-000019 · wk-form4_1787692877.xml · nonDerivative · entry 1 Stepien Thomas M · CIK 0002067233 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 602,096 F1 · kind: This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units. F2 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $10.10 to $10.48, 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 · balance_after: Includes 568,750 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. Read SEC document |
| June 04, 2026 Filed Jun 5, 2026 20:57 UTC | Amprius Technologies, Inc. AMPX · Entity 4742 | SaleCommon stock | 2,000 | $20.97 | $41,940.00 |
DisclosureSEC source: 0002067233-26-000015 · wk-form4_1780693023.xml · nonDerivative · entry 4 Stepien Thomas M · CIK 0002067233 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 625,625 F2 · balance_after: Includes 615,625 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. Read SEC document |
| June 04, 2026 Filed Jun 5, 2026 20:57 UTC | Amprius Technologies, Inc. AMPX · Entity 4742 | GiftCommon stock | 36,914 | $0.00 | $0.00 |
DisclosureSEC source: 0002067233-26-000015 · wk-form4_1780693023.xml · nonDerivative · entry 3 Stepien Thomas M · CIK 0002067233 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Indirect · See Footnote Disclosed balance after: 36,914 F3 · shares: These securities were transferred by the reporting person to the Rogers Stepien Family Revocable Trust, for which the reporting person and his spouse are co-trustees. F4 · ownership.nature: These securities are held by the Rogers Stepien Family Revocable Trust, for which the reporting person and his spouse are co-trustees. Read SEC document |
| June 04, 2026 Filed Jun 5, 2026 20:57 UTC | Amprius Technologies, Inc. AMPX · Entity 4742 | GiftCommon stock | 36,914 | $0.00 | $0.00 |
DisclosureSEC source: 0002067233-26-000015 · wk-form4_1780693023.xml · nonDerivative · entry 2 Stepien Thomas M · CIK 0002067233 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 627,625 F3 · shares: These securities were transferred by the reporting person to the Rogers Stepien Family Revocable Trust, for which the reporting person and his spouse are co-trustees. F2 · balance_after: Includes 615,625 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. Read SEC document |
| June 04, 2026 Filed Jun 5, 2026 20:57 UTC | Amprius Technologies, Inc. AMPX · Entity 4742 | GiftCommon stock | 30,384 | $0.00 | $0.00 |
DisclosureSEC source: 0002067233-26-000015 · wk-form4_1780693023.xml · nonDerivative · entry 1 Stepien Thomas M · CIK 0002067233 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 664,539 F1 · shares: These transfers were made on the same date as bona fide gifts. F2 · balance_after: Includes 615,625 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. Read SEC document |
| May 27, 2026 Filed May 28, 2026 22:22 UTC | Amprius Technologies, Inc. AMPX · Entity 4742 | SaleCommon stock | 4,375 | $17.19 | $75,221.56 |
DisclosureSEC source: 0002067233-26-000012 · wk-form4_1780006923.xml · nonDerivative · entry 1 Stepien Thomas M · CIK 0002067233 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 694,923 F1 · kind: This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units. F2 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $17.13 to $17.3, 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 · balance_after: Includes 615,625 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. Read SEC document |
| May 21, 2026 Filed May 26, 2026 23:03 UTC | Amprius Technologies, Inc. AMPX · Entity 4742 | SaleCommon stock | 60,702 | $14.79 | $897,685.46 |
DisclosureSEC source: 0002067233-26-000008 · wk-form4_1779836599.xml · nonDerivative · entry 1 Stepien Thomas M · CIK 0002067233 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 699,298 F1 · kind: This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units. F2 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $14.54 to $15.08, 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 · balance_after: Includes 625,000 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. Read SEC document |
| March 04, 2026 Filed Mar 6, 2026 22:46 UTC | Amprius Technologies, Inc. AMPX · Entity 4742 | GrantCommon stock | 150,000 | $0.00 | $0.00 |
DisclosureSEC source: 0002067233-26-000002 · wk-form4_1772837200.xml · nonDerivative · entry 1 Stepien Thomas M · CIK 0002067233 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 760,000 F1 · shares: The securities are represented by restricted stock units. Each restricted stock unit represents the reporting person's right to receive one share of the issuer's common stock. 1/16th of shares subject to award will vest on May 20, 2026 and quarterly thereafter on each August 20, November 20, February 20 and May 20, subject to the reporting person's continued service on each such date, until the award is fully vested on February 20, 2030. F2 · balance_after: Includes 750,000 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. Read SEC document |
| December 19, 2025 Filed Dec 22, 2025 13:46 UTC | Amprius Technologies, Inc. AMPX · Entity 4742 | GrantCommon stock | 200,000 | $0.00 | $0.00 |
DisclosureSEC source: 0002067233-25-000010 · wk-form4_1766411211.xml · nonDerivative · entry 1 Stepien Thomas M · CIK 0002067233 · Director · President 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 610,000 F1 · shares: The securities are represented by restricted stock units granted on December 19, 2025, with a vesting commencement date of January 1, 2026. Each restricted stock unit represents the reporting person's right to receive one share of the issuer's common stock. 1/4th of the restricted stock units subject to the award will vest on February 20, 2027 and the remainder will vest quarterly over three years thereafter, on each May 20, August 20, November 20 and February 20, subject to the reporting person's continued service on each such date, until the award is fully vested on February 20, 2030. F2 · balance_after: Includes 600,000 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. Read SEC document |
| December 19, 2025 Filed May 7, 2026 20:53 UTC Amendment | Amprius Technologies, Inc. AMPX · Entity 4742 | GrantCommon stock | 200,000 | $0.00 | $0.00 |
DisclosureSEC source: 0002067233-26-000004 · wk-form4a_1778187198.xml · nonDerivative · entry 1 Stepien Thomas M · CIK 0002067233 · Director · Chief Executive Officer 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 760,000 F1 · shares: This Form 4/A is filed solely to correct the vesting schedule of the restricted stock units of the reporting person reported in the original filing. 2/16th of the shares subject to the award will vest on May 20, 2026 and 1/16th of the shares subject to the award will vest quarterly thereafter on each August 20, November 20, February 20 and May 20, subject to the reporting person's continued service on each such date, until the award is fully vested on November 20, 2029. Read SEC document |
| May 01, 2025 Filed May 7, 2025 00:12 UTC | Amprius Technologies, Inc. AMPX · Entity 4742 | GrantCommon stock | 400,000 | $0.00 | $0.00 |
DisclosureSEC source: 0002067233-25-000005 · wk-form4_1746576758.xml · nonDerivative · entry 1 Stepien Thomas M · CIK 0002067233 · Director · President 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 400,000 F1 · shares: The securities are represented by restricted stock units granted on May 1, 2025. Each restricted stock unit represents the reporting person's right to receive one share of the issuer's common stock. 1/4th of the restricted stock units subject to the award will vest on May 20, 2026 and the remainder will vest quarterly over three years thereafter, on each August 20, November 20, February 20 and May 20, subject to the reporting person's continued service on each such date, until the award is fully vested on May 20, 2029. Read SEC document |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.