Insider filings
Amprius Technologies, Inc. (AMPX)
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About Amprius Technologies, Inc.
from the company's filings and listing, as of Oct 22, 2026- Exchange
- NYSE
- Sector
- Industrials
- Industry
- Electrical Equipment & Parts
- Chief executive
- Thomas Michael Stepien
- Employees
- 97
- Listed since
- Sep 15, 2022
- Market value
- $1.2B
- Price to earnings (12 mo)
- -
- Net income per share, as reported (12 mo)
- -$0.27
- Dividend yield
- -
Earnings
6 reported quarters · next on Nov 5, 2026| Quarter | EPS | EPS expected | Revenue | Revenue expected | Result |
|---|---|---|---|---|---|
| Q2 FY2026reported Aug 4, 2026 | -$0.03 | -$0.02 | $34.0M | $29.3M | EPS miss, GAAPRevenue beat |
| Q1 FY2026reported May 6, 2026 | -$0.04 | -$0.02 | $28.5M | $25.7M | EPS miss, GAAPRevenue beat |
| Q4 FY2025reported Mar 4, 2026 | -$0.01 | -$0.04 | $25.2M | $22.9M | EPS beatRevenue beat |
| Q3 FY2025reported Nov 6, 2025 | -$0.03 | -$0.06 | $21.4M | $23.0M | EPS beat, GAAPRevenue miss |
| Q2 FY2025reported Aug 7, 2025 | -$0.05 | -$0.08 | $15.1M | $12.4M | EPS beat, GAAPRevenue beat |
| Q1 FY2025reported May 8, 2025 | -$0.08 | -$0.09 | $11.3M | $11.4M | EPS beat, GAAPRevenue in line |
Actual against the consensus estimate at the time. A flag marks a beat or a miss of more than 1.5% either way; inside that band the quarter is in line. A flag marked GAAP compares a GAAP figure the company reported with an adjusted consensus, two different measures, so a one-time gain or charge can move it either way. A flag reads n/a only when a number is missing. Quarterly EPS is the figure set against the consensus, usually adjusted, so the quarters need not add up to the 12-month net income per share above. An estimate is a forecast made by analysts, not a company target.
Institutional holders
13F positions as of Jun 30, 2026| Holder | Value | Shares | Shares vs prior qtr | % of shares out |
|---|---|---|---|---|
| BlackRock, Inc. | $157.1M | 11,335,092 | +22.9% | 7.90% |
| Vanguard Capital Management LLC | $77.1M | 5,562,985 | +13.3% | 3.88% |
| Morgan Stanley | $70.8M | 5,105,505 | +61.5% | 3.56% |
| Two Sigma Investments, LP | $59.9M | 4,318,630 | +23.2% | 3.01% |
| UBS Group AG | $56.4M | 4,072,269 | +76.2% | 2.84% |
| Geode Capital Management, LLC | $48.8M | 3,520,655 | +25.1% | 2.45% |
| Jane Street Group, LLC | $47.1M | 3,401,071 | -18.3% | 2.37% |
| State Street Corp | $44.9M | 3,240,285 | +19.5% | 2.26% |
| Goldman Sachs Group Inc | $35.2M | 2,542,294 | +14.2% | 1.77% |
| Jupiter Asset Management Ltd | $29.6M | 2,133,397 | New | 1.49% |
| LMR Partners LLP | $24.3M | 1,750,850 | New | 1.22% |
| Citadel Advisors LLCKen Griffin | $23.2M | 1,676,344 | +16.5% | 1.17% |
A 13F reports long US equity positions and is filed within 45 days of the quarter end, so these are positions as they stood on Jun 30, 2026. New: not in this holder's prior 13F as reported; a change of filer ID can also show as new. For a manager's whole book see the fund directory. What a 13F covers and leaves out is explained in our guide to Form 13F.
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Open-market insider trades
13 filings shown · newest filing first| Insider | Action | Shares | Price | Value | Trade date | Delay (business days) |
|---|---|---|---|---|---|---|
| Thomas M. StepienChief Executive Officer | Sold | 8,000 | $10.03 | $80K | Aug 24, 2026filed Aug 25, 2026 | 1d |
| Thomas M. StepienChief Executive Officer | Sold | 23,529 | $10.34 | $243K | Aug 21, 2026filed Aug 25, 2026 | 2d |
| Constantin Ionel StefanChief Technology Officer | Sold | 29,681 | $10.34 | $307K | Aug 21, 2026filed Aug 25, 2026 | 2d |
| Kang SunDirector | Sold | 62,101 | $10.34 | $642K | Aug 21, 2026filed Aug 25, 2026 | 2d |
| Donald R. DixonDirector | Sold | 85,000 | $17.17 | $1.5M | Jun 15, 2026filed Jun 16, 2026 | 1d |
| Donald R. DixonDirector | Sold | 40,000 | $19.13 | $765K | Jun 9, 2026filed Jun 11, 2026 | 2d |
| Thomas M. StepienChief Executive Officer | Sold | 2,000 | $20.97 | $42K | Jun 4, 2026filed Jun 5, 2026 | 1d |
| Donald R. DixonDirector | Sold | 17,895 | $17.90 | $320K | May 26, 2026filed May 28, 2026 | 2d |
| Constantin Ionel StefanChief Technology Officer | Sold | 3,208 | $17.19 | $55K | May 27, 2026filed May 28, 2026 | 1d |
| Thomas M. StepienChief Executive Officer | Sold | 4,375 | $17.19 | $75K | May 27, 2026filed May 28, 2026 | 1d |
| Kang SunDirector | Sold | 356 | $17.19 | $6K | May 27, 2026filed May 28, 2026 | 1d |
| Constantin Ionel StefanChief Technology Officer | Sold | 28,812 | $14.79 | $426K | May 21, 2026filed May 26, 2026 | 2d |
| Kang SunDirector | Sold | 67,796 | $14.79 | $1.0M | May 21, 2026filed May 26, 2026 | 2d |
One row is one filing, newest filing first. A filing that reported its trade in several tranches is summed, priced at the weighted average, and marked with its line count. The delay counts business days from the trade to the filing, the unit of Form 4's two business day deadline: weekends and federal holidays are skipped. How the filing itself works is explained in our guide to Form 4.
Other Form 4 activity (7)
| Insider | Event | Shares | Date |
|---|---|---|---|
| Thomas M. StepienChief Executive Officer | Stock award | 346 | Aug 25, 2026 |
| Thomas M. StepienChief Executive Officer | Gift | 5,346 | Aug 25, 2026 |
| Steven ChuDirector | Stock award | 10,423 | Jun 12, 2026 |
| Donald R. DixonDirector | Stock award | 10,423 | Jun 12, 2026 |
| Livingston SatterthwaiteDirector | Stock award | 10,423 | Jun 12, 2026 |
| Kathleen A. BaylessDirector | Stock award | 10,423 | Jun 12, 2026 |
| Thomas M. StepienChief Executive Officer | Gift | 67,298 | Jun 4, 2026 |
Awards, option exercises, shares withheld to cover tax and gifts all file on the same form as a purchase or a sale. None of them is a decision to trade, so they sit here rather than beside the ones that are.
Questions
Are insiders buying or selling AMPX?
Across the 13 most recent open-market filings shown here, 0 were purchases and 13 were sales.
How quickly are AMPX trades disclosed?
Insider filings on this page reached the public a median of 2 business days after the transaction (weekends and federal holidays skipped), against the two business days Form 4 allows.
How to read a Form 4
A DECISION THE INSIDER MADE
COMPENSATION PLUMBING
Congress rows disclose a value range rather than an exact amount, and the STOCK Act allows up to 45 days to report. Full sourcing and the limits of this data are on the methodology page. A filing is a record of a transaction, not a signal, and nothing here is investment advice.
Data as of Oct 26, 2026.