Amprius Technologies, Inc. (AMPX)
NYSE · Miscellaneous Electrical Machinery, Equipment & Supplies · Manufacturing · CIK 1899287 · fiscal year ends in Dec
Closing price $9.13 on 29 Oct 2026; 52-week range $7.58 to $22.91.
Key figures
The last twelve months reported, with the latest price and balance sheet.
- Revenue, last twelve months
- $109.2M
- Revenue growth
- 143.6%
- Net income, last twelve months
- -$36.5M
- Earnings per share
- -$0.30
- Gross margin
- 22.3%
- Operating margin
- -37.7%
- Net margin
- -33.4%
- Free cash flow
- -$58.4M
- Return on equity
- -29.0%
- Market value
- $1.3B
- Cash
- $74.5M
- Debt
- $0
- Debt to equity
- 0.00
- Shares outstanding
- 146.1M
Financial statements
Revenue, profit and cash flow by fiscal year, each year linked to its annual report.
| Fiscal year | Year end | Revenue | Operating income | Net income | EPS | Free cash flow | Filing |
|---|---|---|---|---|---|---|---|
| FY2025 | 31 Dec 2025 | $73.0M | -$46.6M | -$44.0M | -$0.35 | -$35.5M | 10-K filed 6 Mar 2026 |
| FY2024 | 31 Dec 2024 | $24.2M | -$46.3M | -$44.7M | -$0.45 | -$36.6M | 10-K filed 20 Mar 2025 |
| FY2023 | 31 Dec 2023 | $9.1M | -$38.7M | -$36.8M | -$0.43 | -$43.1M | 10-K filed 28 Mar 2024 |
| FY2022 | 31 Dec 2022 | $4.4M | -$18.0M | -$17.3M | -$0.24 | -$15.4M | 10-K filed 30 Mar 2023 |
| FY2021 | 31 Dec 2021 | $2.8M | -$10.6M | -$9.9M | -$0.15 | -$8.6M | 10-K filed 30 Mar 2023 |
By quarter
| Quarter | Quarter end | Revenue | Net income | EPS |
|---|---|---|---|---|
| Q2 FY2026 | 30 Jun 2026 | $34.0M | -$3.2M | -$0.04 |
| Q1 FY2026 | 31 Mar 2026 | $28.5M | -$5.0M | -$0.04 |
| Q4 FY2025 | 31 Dec 2025 | $25.2M | -$24.4M | -$0.19 |
| Q3 FY2025 | 30 Sep 2025 | $21.4M | -$3.9M | -$0.03 |
| Q2 FY2025 | 30 Jun 2025 | $15.1M | -$6.4M | -$0.05 |
| Q1 FY2025 | 31 Mar 2025 | $11.3M | -$9.4M | -$0.08 |
| Q4 FY2024 | 31 Dec 2024 | $10.6M | -$11.4M | -$0.11 |
| Q3 FY2024 | 30 Sep 2024 | $7.9M | -$10.8M | -$0.10 |
Revenue by segment
As the company reports it in the segment note of its annual report.
By region, FY2025
| Segment | Revenue | Share |
|---|---|---|
| EMEA | $52.6M | 72.0% |
| North America | $11.8M | 16.2% |
| APAC | $8.6M | 11.8% |
Company events
The newest 8-K filings of 64 held.
| Filed | Form | Event | Items |
|---|---|---|---|
| 28 Sep 2026 | 8-K | Material agreement | 1.01, 9.01 |
| 13 Aug 2026 | 8-K | Material agreement, New debt | 1.01, 2.03, 9.01 |
| 4 Aug 2026 | 8-K | Results | 2.02, 9.01 |
| 17 Jun 2026 | 8-K | Shareholder vote | 5.07 |
| 19 May 2026 | 8-K/A | Share sale | 3.02 |
| 7 May 2026 | 8-K | Material agreement, Share sale | 1.01, 3.02, 9.01 |
| 6 May 2026 | 8-K | Results | 2.02, 9.01 |
| 21 Apr 2026 | 8-K | Auditor change | 4.01 |
| 4 Mar 2026 | 8-K | Results | 2.02, 9.01 |
| 3 Feb 2026 | 8-K | Agreement ended | 1.02 |
| 12 Jan 2026 | 8-K | Other events | 8.01 |
| 22 Dec 2025 | 8-K | Leadership change | 5.02 |
Every filing
The newest filings with the SEC of 196 held.
| Filed | Form | Period |
|---|---|---|
| 9 Oct 2026 | S-3ASR | – |
| 28 Sep 2026 | 8-K | 23 Sep 2026 |
| 13 Aug 2026 | 8-K | 7 Aug 2026 |
| 6 Aug 2026 | 10-Q | 30 Jun 2026 |
| 4 Aug 2026 | 8-K | 4 Aug 2026 |
| 17 Jun 2026 | 8-K | 11 Jun 2026 |
| 19 May 2026 | 8-K/A | 6 May 2026 |
| 7 May 2026 | 8-K | 6 May 2026 |
| 7 May 2026 | 10-Q | 31 Mar 2026 |
| 6 May 2026 | 8-K | 6 May 2026 |
| 29 Apr 2026 | ARS | 31 Dec 2025 |
| 29 Apr 2026 | DEFA14A | – |
Insider trades
Form 4 trades by officers, directors and 10% owners, last 12 months.
| Traded | Insider | Type | Shares | Price | Value | Held after | Form 4 |
|---|---|---|---|---|---|---|---|
| 24 Aug 2026 | Stepien Thomas M, Chief Executive Officer | Sale outside a trading plan | 8,000 | $10.03 | $80.2K | 594,096 | 25 Aug 2026 |
| 21 Aug 2026 | Sun Kang, Director | Sale outside a trading plan | 62,101 | $10.34 | $642.2K | 1,218,397 | 25 Aug 2026 |
| 21 Aug 2026 | Stefan Constantin Ionel, Chief Technology Officer | Sale outside a trading plan | 29,681 | $10.34 | $306.9K | 771,629 | 25 Aug 2026 |
| 21 Aug 2026 | Stepien Thomas M, Chief Executive Officer | Sale outside a trading plan | 23,529 | $10.34 | $243.3K | 602,096 | 25 Aug 2026 |
| 15 Jun 2026 | Dixon Donald R, Director | Sale outside a trading plan | 85,000 | $17.17 | $1.5M | 359,380 | 16 Jun 2026 |
| 9 Jun 2026 | Dixon Donald R, Director | Sale outside a trading plan | 40,000 | $19.13 | $765.2K | 444,380 | 11 Jun 2026 |
| 4 Jun 2026 | Stepien Thomas M, Chief Executive Officer | Sale outside a trading plan | 2,000 | $20.97 | $41.9K | 625,625 | 5 Jun 2026 |
| 27 May 2026 | Sun Kang, Director | Sale outside a trading plan | 356 | $17.19 | $6.1K | 1,280,498 | 28 May 2026 |
| 27 May 2026 | Stepien Thomas M, Chief Executive Officer | Sale outside a trading plan | 4,375 | $17.19 | $75.2K | 694,923 | 28 May 2026 |
| 27 May 2026 | Stefan Constantin Ionel, Chief Technology Officer | Sale outside a trading plan | 3,208 | $17.19 | $55.2K | 801,310 | 28 May 2026 |
| 26 May 2026 | Dixon Donald R, Director | Sale outside a trading plan | 17,895 | $17.90 | $320.3K | 484,380 | 28 May 2026 |
| 21 May 2026 | Sun Kang, Director | Sale outside a trading plan | 67,796 | $14.79 | $1.0M | 1,280,854 | 26 May 2026 |
Planned insider sales
Form 144 notices, filed when the sell order goes to the broker.
| Filed | Seller | Shares | Value | Planned sale |
|---|---|---|---|---|
| 25 Aug 2026 | THOMAS M STEPIEN, OFFICER, DIRECTOR | 23,529 | $243.3K | 21 Aug 2026 |
| 25 Aug 2026 | Constantin Ionel Stefan, OFFICER | 29,681 | $306.9K | 21 Aug 2026 |
| 25 Aug 2026 | KANG SUN, Director | 62,101 | $642.2K | 21 Aug 2026 |
| 24 Aug 2026 | THOMAS M STEPIEN, Officer, Director | 8,000 | $80.2K | 24 Aug 2026 |
| 8 Jun 2026 | DIXON DONALD R, Director | 125,000 | $2.4M | 8 Jun 2026 |
| 4 Jun 2026 | THOMAS M STEPIEN, Officer, Director | 2,000 | $41.9K | 4 Jun 2026 |
| 28 May 2026 | KANG SUN, Director | 356 | $6.1K | 27 May 2026 |
| 28 May 2026 | Constantin Ionel Stefan, Officer | 3,208 | $55.2K | 27 May 2026 |
| 28 May 2026 | Thomas M. Stepien, Officer, Director | 4,375 | $75.2K | 27 May 2026 |
| 26 May 2026 | DIXON DONALD R, Director | 17,895 | $315.8K | 26 May 2026 |
Large holders
Schedule 13D and 13G filings by holders of more than 5% of the voting shares.
| Filed | Holder | Schedule | Stake | Shares |
|---|---|---|---|---|
| 10 Aug 2026 | JANE STREET GROUP, LLC | 13G amended | 3.3% | 4.7M |
| 27 Jul 2026 | BlackRock, Inc. | 13G amended | 7.4% | 10.7M |
| 28 Apr 2026 | JANE STREET GROUP, LLC | 13G | 5.1% | 7.0M |
| 26 Mar 2026 | The Vanguard Group | 13G amended | 0% | 0 |
| 30 Oct 2025 | The Vanguard Group | 13G | 5.2% | 6.5M |
Short interest
Shares sold short and not yet bought back, on each FINRA settlement date.
| Settlement | Shares short | Change | Days to cover |
|---|---|---|---|
| 15 Oct 2026 | 22.7M | -0.4% | 3.81 |
| 30 Sep 2026 | 22.8M | +0.57% | 3.8 |
| 15 Sep 2026 | 22.7M | -2.05% | 5.08 |
| 31 Aug 2026 | 23.2M | +4.57% | 5.28 |
| 14 Aug 2026 | 22.1M | -7.44% | 3.09 |
| 31 Jul 2026 | 23.9M | -14.65% | 4.16 |
| 15 Jul 2026 | 28.0M | +6.56% | 4.22 |
| 30 Jun 2026 | 26.3M | +15.31% | 3.21 |
Funds that hold it
From each fund's latest Form 13F.
306 funds held it at 30 Jun 2026: 169 added and 63 trimmed in the quarter. The largest:
| Fund | Shares | Value | Change in the quarter |
|---|---|---|---|
| BlackRock, Inc. | 11,335,092 | $157.1M | +2,109,481 |
| Vanguard Capital Management LLC | 5,562,985 | $77.1M | +654,110 |
| Morgan Stanley | 5,105,505 | $70.8M | +1,943,338 |
| Two Sigma Investments, LP | 4,318,630 | $59.9M | +812,555 |
| UBS Group AG | 4,072,269 | $56.4M | +1,760,715 |
| Geode Capital Management, LLC | 3,520,655 | $48.8M | +706,125 |
| Jane Street Group, LLC | 3,401,071 | $47.1M | -759,585 |
| State Street Corp. | 3,240,285 | $44.9M | +527,655 |
| Goldman Sachs Group Inc. | 2,542,294 | $35.2M | +316,113 |
| Jupiter Asset Management Ltd | 2,133,397 | $29.6M | +2,133,397 |
Peers
Companies in the same industry.
- EnerSys (ENS): revenue $3.8B, market value $6.2B
- Novanta Inc. (NOVT): revenue $1.0B, market value $5.7B
- Spectrum Brands Holdings, Inc. (SPB): revenue $2.9B, market value $1.9B
- Energizer Holdings, Inc. (ENR): revenue $3.0B, market value $1.6B
- Enovix Corp. (ENVX): revenue $35.9M, market value $769.4M
- Eos Energy Enterprises, Inc. (EOSE): revenue $214.2M, market value $677.8M
- Energy Vault Holdings, Inc. (NRGV): revenue $225.9M, market value $590.2M
- Solid Power, Inc. (SLDP): revenue $11.0M, market value $462.4M