Amprius Technologies (AMPX) Latest Stock Analysis Report – Oct 15, 2026, 4:00 PM ET
Updated Oct 15, 2026, 4:00 PM ET
- Closed at $8.40, +5.00% vs the prior close of $8.00.
- Volume 8.79M shares, 1.6x its 50-day average.
- No new SEC filings since the prior session.
- No new insider buys or sales reported since the prior session.
AMPX jumps 5.0% to $8.40. Closed at $8.40, +5.00% vs the prior close of $8.00. Day range $7.28–$8.50, opened at $7.66.
AMPX daily analysis — what happened
A plain-English, data-only note written after every US trading day. Newest first; older days stay archived below.
Oct 15, 2026 — AMPX jumps 5.0% to $8.40
- Closed at $8.40, +5.00% vs the prior close of $8.00. Day range $7.28–$8.50, opened at $7.66.
- Volume was 8.79M shares, 1.6x its 50-day average of 5.48M.
- Price is -15.9% vs its 50-day average ($9.99) and -37.6% vs its 200-day average ($13.45).
- 52-week range $7.28–$24.23; today's close sits at 7% of that range, 65.3% below the 52-week high.
Oct 14, 2026 — AMPX slides 6.5% to $8.00, a 6-month low, 3 down days in a row
- Closed at $8.00, -6.54% vs the prior close of $8.56. Day range $7.85–$8.48, opened at $8.37.
- Volume was 7.00M shares, 1.3x its 50-day average of 5.51M.
- Price is -20.5% vs its 50-day average ($10.06) and -40.5% vs its 200-day average ($13.45).
- 52-week range $7.71–$24.23; today's close sits at 2% of that range, 67.0% below the 52-week high.
- That makes 3 straight losses.
Oct 13, 2026 — AMPX slides 3.5% to $8.56, a 1-month low
- Closed at $8.56, -3.49% vs the prior close of $8.87. Day range $8.40–$8.71, opened at $8.61.
- Volume was 5.22M shares, 1.0x its 50-day average of 5.50M.
- Price is -15.4% vs its 50-day average ($10.11) and -36.4% vs its 200-day average ($13.45).
- 52-week range $7.71–$24.23; today's close sits at 5% of that range, 64.7% below the 52-week high.
Oct 12, 2026 — AMPX slides 6.0% to $8.87, a 1-month low
- Closed at $8.87, -6.04% vs the prior close of $9.44. Day range $8.86–$9.40, opened at $9.40.
- Volume was 5.62M shares, 1.0x its 50-day average of 5.49M.
- Price is -12.6% vs its 50-day average ($10.15) and -34.1% vs its 200-day average ($13.45).
- 52-week range $7.71–$24.23; today's close sits at 7% of that range, 63.4% below the 52-week high.
Oct 9, 2026 — AMPX rises 0.5% to $9.44
- Closed at $9.44, +0.53% vs the prior close of $9.39. Day range $9.14–$9.57, opened at $9.49.
- Volume was 5.13M shares, 0.9x its 50-day average of 5.51M.
- Price is -7.1% vs its 50-day average ($10.16) and -29.8% vs its 200-day average ($13.45).
- 52-week range $7.71–$24.23; today's close sits at 10% of that range, 61.0% below the 52-week high.
Oct 8, 2026 — AMPX rises 0.6% to $9.39
- Closed at $9.39, +0.64% vs the prior close of $9.33. Day range $9.08–$9.46, opened at $9.16.
- Volume was 5.10M shares, 0.9x its 50-day average of 5.54M.
- Price is -7.6% vs its 50-day average ($10.16) and -30.2% vs its 200-day average ($13.45).
- 52-week range $7.71–$24.23; today's close sits at 10% of that range, 61.2% below the 52-week high.
Oct 7, 2026 — AMPX dips 1.5% to $9.33
- Closed at $9.33, -1.48% vs the prior close of $9.47. Day range $8.85–$9.35, opened at $9.29.
- Volume was 8.01M shares, 1.5x its 50-day average of 5.51M.
- Price is -8.0% vs its 50-day average ($10.14) and -30.6% vs its 200-day average ($13.45).
- 52-week range $7.71–$24.23; today's close sits at 10% of that range, 61.5% below the 52-week high.
Oct 6, 2026 — AMPX ends flat (+0.2%) to $9.47
- Closed at $9.47, +0.21% vs the prior close of $9.45. Day range $9.41–$9.77, opened at $9.56.
- Volume was 4.57M shares, 0.8x its 50-day average of 5.53M.
- Price is -6.6% vs its 50-day average ($10.14) and -29.6% vs its 200-day average ($13.45).
- 52-week range $7.71–$24.23; today's close sits at 11% of that range, 60.9% below the 52-week high.
Oct 5, 2026 — AMPX dips 2.3% to $9.45
- Closed at $9.45, -2.28% vs the prior close of $9.67. Day range $9.31–$9.85, opened at $9.81.
- Volume was 5.71M shares, 1.0x its 50-day average of 5.50M.
- Price is -6.8% vs its 50-day average ($10.14) and -29.7% vs its 200-day average ($13.44).
- 52-week range $7.71–$24.23; today's close sits at 11% of that range, 61.0% below the 52-week high.
Oct 2, 2026 — AMPX rises 0.6% to $9.67
- Closed at $9.67, +0.62% vs the prior close of $9.61. Day range $9.53–$9.91, opened at $9.88.
- Volume was 5.04M shares, 0.9x its 50-day average of 5.48M.
- Price is -4.6% vs its 50-day average ($10.14) and -28.1% vs its 200-day average ($13.45).
- 52-week range $7.71–$24.23; today's close sits at 12% of that range, 60.1% below the 52-week high.
AMPX latest news & SEC filings
Every SEC filing by or about AMPX in the last 120 days, explained in plain English. Updated daily, with a same-day refresh for new filings.
Oct 9, 2026 · S-3ASR — S-3ASR filing
S-3ASR filing
An offering document: new shares or debt may be sold, which can increase the share count (dilution) or debt load. Size and terms are in the prospectus.
Sep 28, 2026 · 8-K — Current report
Current report — a filing companies must make within 4 business days of a major event
- Item 1.01 — Signed a material agreement.
Aug 25, 2026 · 4 — Insider trade report (Form 4)
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Sun Kang sold 62,101 shares at $10.34 (≈$642.12K) on Aug 21, 2026
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Aug 25, 2026 · 144 — Notice of proposed sale (Form 144)
Notice of proposed sale (Form 144) — an insider or affiliate plans to sell restricted or control shares
A notice of intent, not a completed sale. Any actual sale by a director or officer shows up later on Form 4.
Aug 25, 2026 · 4 — Insider trade report (Form 4)
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Stefan Constantin Ionel sold 29,681 shares at $10.34 (≈$306.90K) on Aug 21, 2026
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Aug 25, 2026 · 144 — Notice of proposed sale (Form 144)
Notice of proposed sale (Form 144) — an insider or affiliate plans to sell restricted or control shares
A notice of intent, not a completed sale. Any actual sale by a director or officer shows up later on Form 4.
Aug 25, 2026 · 4 — Insider trade report (Form 4)
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Stepien Thomas M sold 8,000 shares at $10.03 (≈$80.24K) on Aug 24, 2026
- Stepien Thomas M sold 23,529 shares at $10.34 (≈$243.29K) on Aug 21, 2026
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Aug 25, 2026 · 144 — Notice of proposed sale (Form 144)
Notice of proposed sale (Form 144) — an insider or affiliate plans to sell restricted or control shares
A notice of intent, not a completed sale. Any actual sale by a director or officer shows up later on Form 4.
Aug 13, 2026 · 8-K — Current report
Current report — a filing companies must make within 4 business days of a major event
- Item 1.01 — Signed a material agreement.
- Item 2.03 — Took on a new material debt or financial obligation.
Aug 10, 2026 · SCHEDULE 13G/A — Update to a passive 5%+ stake (13G)
Update to a passive 5%+ stake (13G)
Filed by an outside investor (not the company). It reports a holding of more than 5% of a share class; percentage and holder name are in the filing.
Aug 6, 2026 · 10-Q — Quarterly report (unaudited financial statements for the quarter)
Quarterly report (unaudited financial statements for the quarter)
Quarter ended Jun 30, 2026:
- Revenue: $34.03M (prior year $15.07M) (+125.9% vs Jun 30, 2025)
- Net income: -$3.15M (prior year -$6.37M) (loss narrowed vs Jun 30, 2025)
- Diluted EPS: -$0.04 (prior year -$0.05) (loss narrowed vs Jun 30, 2025)
Aug 4, 2026 · 8-K — Current report
Current report — a filing companies must make within 4 business days of a major event
- Item 2.02 — Reported results of operations (earnings release).
This is a results-day filing: the earnings press release is attached as an exhibit.
Jul 27, 2026 · SCHEDULE 13G/A — Update to a passive 5%+ stake (13G)
Update to a passive 5%+ stake (13G)
Filed by an outside investor (not the company). It reports a holding of more than 5% of a share class; percentage and holder name are in the filing.
Things to know before you trade AMPX
- Last results release: Aug 4, 2026 (8-K Item 2.02). Previous ones: May 6, 2026, Mar 4, 2026, Nov 6, 2025. Based on that rhythm, the next report is likely around Nov 3, 2026 — an estimate, not a confirmed date.
- How much it moves: over the last 20 sessions the average daily move was 2.02% (largest 6.5%).
- Liquidity: about 6.09M shares (≈$51.19M) trade per day on average.
- 52-week position: $8.40 vs a range of $7.28–$24.23 (7% of the range).
- Dividends: no cash dividends in the last 2 years.
- Splits: none in the last 2 years.
- Insider trades (Form 4, last 12 months, recent 25 shown): 0 open-market buys, 25 sales; latest: Thomas M Stepien sold 8,000 shares on Aug 24, 2026.
- Latest filings: 8-K Sep 28, 2026; 8-K Aug 13, 2026; 10-Q Aug 6, 2026.
- Share count: 146.08M shares outstanding (Jul 31, 2026), +16.8% vs a year earlier — notable dilution.
- Listing: NYSE · industry: Miscellaneous Electrical Machinery, Equipment & Supplies.
AMPX market data (last 20 sessions)
| Date | Open | High | Low | Close | Volume |
|---|---|---|---|---|---|
| Oct 15, 2026 | 7.66 | 8.50 | 7.28 | 8.40 | 8.79M |
| Oct 14, 2026 | 8.37 | 8.48 | 7.85 | 8.00 | 7.00M |
| Oct 13, 2026 | 8.61 | 8.71 | 8.40 | 8.56 | 5.22M |
| Oct 12, 2026 | 9.40 | 9.40 | 8.86 | 8.87 | 5.62M |
| Oct 9, 2026 | 9.49 | 9.57 | 9.14 | 9.44 | 5.13M |
| Oct 8, 2026 | 9.16 | 9.46 | 9.08 | 9.39 | 5.10M |
| Oct 7, 2026 | 9.29 | 9.35 | 8.85 | 9.33 | 8.01M |
| Oct 6, 2026 | 9.56 | 9.77 | 9.41 | 9.47 | 4.57M |
| Oct 5, 2026 | 9.81 | 9.85 | 9.31 | 9.45 | 5.71M |
| Oct 2, 2026 | 9.88 | 9.91 | 9.53 | 9.67 | 5.04M |
| Oct 1, 2026 | 9.62 | 9.99 | 9.36 | 9.61 | 5.32M |
| Sep 30, 2026 | 9.75 | 9.99 | 9.62 | 9.68 | 6.88M |
| Sep 29, 2026 | 9.56 | 9.73 | 9.32 | 9.53 | 6.77M |
| Sep 28, 2026 | 10.88 | 11.23 | 9.47 | 9.60 | 15.13M |
| Sep 25, 2026 | 9.84 | 10.02 | 9.65 | 9.75 | 4.02M |
| Sep 24, 2026 | 9.51 | 9.86 | 9.37 | 9.69 | 4.71M |
| Sep 23, 2026 | 9.93 | 10.16 | 9.69 | 9.73 | 5.34M |
| Sep 22, 2026 | 9.80 | 10.05 | 9.62 | 9.98 | 4.59M |
| Sep 21, 2026 | 9.80 | 9.93 | 9.48 | 9.61 | 4.09M |
| Sep 18, 2026 | 9.70 | 9.85 | 9.20 | 9.50 | 4.84M |
About Amprius Technologies
Amprius Technologies (AMPX) is listed on the NYSE and classified by the SEC under “Miscellaneous Electrical Machinery, Equipment & Supplies”. Its business address is in FREMONT, CA. State of incorporation: DE. Fiscal year ends December 31. SEC CIK 1899287.
AMPX board of directors & executives
From SEC Form 3/4/5 insider filings made in the last 12 months (date = latest filing).
Directors
| Name | Role | Latest filing |
|---|---|---|
| Kathleen A Bayless | Director | Jun 16, 2026 |
| Steven Chu | Director | Jun 16, 2026 |
| Donald R Dixon | Director | Jun 16, 2026 |
| Wen Hsuan Hsieh | Director | Mar 13, 2026 |
| Livingston Satterthwaite | Director | Jun 16, 2026 |
| Thomas M Stepien | Chief Executive Officer | Aug 25, 2026 |
| Kang Sun | Director | Aug 25, 2026 |
Executive officers
| Name | Title | Latest filing |
|---|---|---|
| Ricardo C. Rodriguez | Chief Financial Officer | Mar 13, 2026 |
| Constantin Ionel Stefan | Chief Technology Officer | Aug 25, 2026 |
| Thomas M Stepien | Chief Executive Officer | Aug 25, 2026 |
Recent insider buys & sales
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 24, 2026 | Thomas M Stepien | Sale | 8,000 | $10.03 |
| Aug 21, 2026 | Thomas M Stepien | Sale | 23,529 | $10.34 |
| Aug 21, 2026 | Constantin Ionel Stefan | Sale | 29,681 | $10.34 |
| Aug 21, 2026 | Kang Sun | Sale | 62,101 | $10.34 |
| Jun 15, 2026 | Donald R Dixon | Sale | 85,000 | $17.17 |
| Jun 9, 2026 | Donald R Dixon | Sale | 40,000 | $19.13 |
| Jun 4, 2026 | Thomas M Stepien | Sale | 2,000 | $20.97 |
| May 27, 2026 | Kang Sun | Sale | 356 | $17.19 |
| May 27, 2026 | Constantin Ionel Stefan | Sale | 3,208 | $17.19 |
| May 27, 2026 | Thomas M Stepien | Sale | 4,375 | $17.19 |
| May 26, 2026 | Donald R Dixon | Sale | 17,895 | $17.90 |
| May 21, 2026 | Thomas M Stepien | Sale | 60,702 | $14.79 |
| May 21, 2026 | Constantin Ionel Stefan | Sale | 28,812 | $14.79 |
| May 21, 2026 | Kang Sun | Sale | 67,796 | $14.79 |
| Apr 1, 2026 | Kang Sun | Sale | 1,250,963 | $15.73 |
AMPX financials (annual, from XBRL filings)
| Fiscal year end | Revenue | Net income | Diluted EPS | Operating cash flow |
|---|---|---|---|---|
| Dec 31, 2025 | $71.91M | $-44.02M | -0.35 | $-31.13M |
| Dec 31, 2024 | $23.57M | $-44.67M | -0.45 | $-33.35M |
| Dec 31, 2023 | $8.79M | $-36.78M | -0.43 | $-25.55M |
| Dec 31, 2022 | — | $-17.33M | -0.24 | $-13.88M |
| Dec 31, 2021 | — | $-9.90M | -0.15 | $-8.02M |
Latest balance sheet: total assets $149.18M, total liabilities $23.55M, cash $74.52M (as of Jun 30, 2026).
AMPX earnings / results-day log
| Date | Filing | Close that day |
|---|---|---|
| Aug 4, 2026 | 8-K Item 2.02 (results) | $10.81 |
| May 6, 2026 | 8-K Item 2.02 (results) | $22.19 |
| Mar 4, 2026 | 8-K Item 2.02 (results) | $12.55 |
| Nov 6, 2025 | 8-K Item 2.02 (results) | $11.26 |
| Aug 7, 2025 | 8-K Item 2.02 (results) | $7.72 |
| May 8, 2025 | 8-K Item 2.02 (results) | $2.49 |
| Mar 20, 2025 | 8-K Item 2.02 (results) | $2.31 |
| Mar 4, 2025 | 8-K Item 2.02 (results) | $2.22 |
| Nov 7, 2024 | 8-K Item 2.02 (results) | $1.30 |
| Oct 29, 2024 | 8-K Item 2.02 (results) | $1.50 |
| Aug 8, 2024 | 8-K Item 2.02 (results) | — |
| May 9, 2024 | 8-K Item 2.02 (results) | — |
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Information only, not investment advice. BuyMeWhiskey is not a registered investment adviser or broker-dealer; nothing here is a recommendation to buy, sell or hold any security, and there are no price targets. Data comes from SEC EDGAR filings and public end-of-day market data and may be delayed or contain errors. Verify with the company's filings before making decisions. Prices: end-of-day data as of Oct 15, 2026, 4:00 PM ET. Filings: SEC EDGAR. Updated after every US trading day.