Ambiq Micro, Inc.
AMBQ · Semiconductors & Related Devices · 21.4M shares · EDGAR filings ↗
Reference price $78.85 · est. market cap ~$1.7B — last insider sale, 2026-05-27 (estimated from the dated SEC Form 4 price × shares outstanding — not a live quote)
Grade
D44Recently-IPO'd low-power chip startup: deep losses and cash burn, well-funded for now.
Strengths
- Flush with IPO cash — current ratio 8.76 (91st)
Risks
- Deep operating losses — operating margin -54.5% (16th), net margin -50.3%
- Cash burn — OCF margin -27.2%
- Revenue declining — -4.7% (18th)
Notable findings
- Net lossNet loss (net margin -50.3%)
- Fund exitedNotable fund(s) exited this quarter: VANGUARD GROUP INC
- Exec changeRecent 8-K item 5.02 8-K ↗
- Material weakness• We previously identified a material weakness in our internal control over financial reporting that we have fully remediated, however, we may experience additional material weaknesses or otherwise fa
- Strong balance sheetStrong balance sheet — $140M cash & investments
- Insider sellingInsider selling — 16 open-market sale(s) by 7 insider(s) (cluster of 7 insiders, ~$17M, last 6mo) Form 4 ↗
- Notable holderHeld by 4 notable fund(s): GOLDMAN SACHS GROUP INC, STATE STREET CORP, RENAISSANCE TECHNOLOGIES LLC +1 more (as of 2026-03-31)
- New fund positionNotable fund(s) opened this quarter: RENAISSANCE TECHNOLOGIES LLC
Quarterly revenue
Last 2 quarters · from SEC filings.
Key metrics
Return on equity
-22.4%
Return on assets
-19.7%
Revenue growth (QoQ)
-10.4%
Current ratio
8.8×
EBITDA
-$32M
Tangible book value
$151M
Cash & investments
$140M
Insider transactions · last 18 months
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| 2026-06-08 | Banks Bernard Bennett | Grant | 5.0K | — |
| 2026-06-08 | HSIEH Wen Hsuan | Grant | 5.0K | — |
| 2026-06-08 | Chen Timothy | Grant | 5.0K | — |
| 2026-06-08 | TAUTGES JOSEPH A | Grant | 5.0K | — |
| 2026-06-08 | ZHANG KER | Grant | 5.0K | — |
| 2026-06-02 | Winzeler Jeffrey G | Option exercise | 6.0K | $16.80 |
| 2026-05-27 | Chen Timothy | Sell | 24K | $79.72 |
| 2026-05-27 | Chen Timothy | Sell | 22K | $78.85 |
| 2026-05-27 | Chen Timothy | Sell | 21K | $80.61 |
| 2026-05-27 | Chen Timothy | Sell | 3.3K | $81.57 |
| 2026-05-15 | Esaka Fumihide | Option exercise | 15K | $12.60 |
| 2026-05-15 | Winzeler Jeffrey G | Option exercise | 6.0K | $16.80 |
| 2026-05-15 | Chen Sean Chihhsiang | Option exercise | 56K | $5.88 |
| 2026-05-15 | Chen Sean Chihhsiang | Sell | 32K | $70.53 |
| 2026-05-15 | Chen Sean Chihhsiang | Sell | 23K | $71.37 |
| 2026-05-15 | Esaka Fumihide | Option exercise | 45K | $8.12 |
| 2026-05-15 | Hanson Scott McLean | Option exercise | 8.1K | $8.12 |
| 2026-05-14 | Winzeler Jeffrey G | Sell | 26K | $69.90 |
| 2026-05-14 | Esaka Fumihide | Option exercise | 60K | $8.12 |
| 2026-05-14 | Esaka Fumihide | Sell | 60K | $70.02 |
| 2026-05-14 | Hanson Scott McLean | Option exercise | 10K | $8.12 |
| 2026-05-14 | Hanson Scott McLean | Sell | 3.9K | $68.62 |
| 2026-05-14 | Hanson Scott McLean | Sell | 6.1K | $69.59 |
| 2026-05-14 | Hanson Scott McLean | Sell | 200 | $70.50 |
| 2026-05-14 | Winzeler Jeffrey G | Option exercise | 26K | $16.80 |
| 2026-05-14 | Winzeler Jeffrey G | Sell | 82 | $70.65 |
| 2026-04-02 | Connors Michele Kim | Sell | 660 | $26.04 |
| 2026-04-02 | Connors Michele Kim | Sell | 151 | $26.65 |
| 2026-03-06 | Hanson Scott McLean | Grant | 80K | — |
| 2026-03-06 | Winzeler Jeffrey G | Grant | 42K | — |
| 2026-03-06 | Connors Michele Kim | Grant | 32K | — |
| 2026-03-06 | Chen Sean Chihhsiang | Grant | 64K | — |
| 2026-03-06 | Esaka Fumihide | Grant | 161K | — |
| 2026-03-06 | Hanson Scott McLean | Grant | 80K | — |
| 2026-03-06 | Winzeler Jeffrey G | Grant | 42K | — |
| 2026-03-06 | Connors Michele Kim | Grant | 32K | — |
| 2026-03-06 | Chen Sean Chihhsiang | Grant | 64K | — |
| 2026-03-06 | Esaka Fumihide | Grant | 161K | — |
| 2026-02-18 | HSIEH Wen Hsuan | Option exercise | 239K | $12.60 |
| 2026-01-26 | TAUTGES JOSEPH A | Sell | 7.8K | $31.00 |
| 2026-01-26 | Hanson Scott McLean | Sell | 10K | $31.00 |
| 2026-01-05 | Connors Michele Kim | Grant | 24K | — |
| 2026-01-05 | Connors Michele Kim | Grant | 5.5K | — |
| 2025-10-07 | Esaka Fumihide | Option exercise | 54K | $5.88 |
| 2025-10-02 | Esaka Fumihide | Grant | 160K | — |
| 2025-10-02 | Winzeler Jeffrey G | Grant | 53K | — |
| 2025-10-02 | Chen Sean Chihhsiang | Grant | 56K | — |
| 2025-10-02 | Hanson Scott McLean | Grant | 84K | — |
| 2025-07-31 | Chen Timothy | Conversion | 71K | — |
| 2025-07-31 | KPCB XVI Associates, LLC | Conversion | 195K | — |
| 2025-07-31 | HSIEH Wen Hsuan | Conversion | 395K | — |
| 2025-07-31 | KPCB XVI Associates, LLC | Conversion | 99K | — |
| 2025-07-31 | KPCB XVI Associates, LLC | Conversion | 748K | — |
| 2025-07-31 | KPCB XVI Associates, LLC | Conversion | 23K | — |
| 2025-07-29 | TAUTGES JOSEPH A | Grant | 57K | — |
| 2025-07-29 | Chen Timothy | Grant | 48K | — |
| 2025-07-29 | ZHANG KER | Grant | 24K | — |
All non-derivative Form 4 activity (SEC), newest first.
Notable events (8-K)
Recent filings
| Form | Filed | Period | Accession |
|---|---|---|---|
| 8-K | 2026-06-08 | 2026-06-08 | 0001193125-26-261248 ↗ |
| 10-Q | 2026-05-12 | 2026-03-31 | 0001193125-26-219341 ↗ |
| 8-K | 2026-05-12 | 2026-05-12 | 0001193125-26-218189 ↗ |
| 10-K | 2026-03-05 | 2025-12-31 | 0001193125-26-094004 ↗ |
| 8-K | 2026-03-05 | 2026-03-05 | 0001193125-26-092653 ↗ |
| 8-K | 2026-01-21 | 2026-01-21 | 0001193125-26-017259 ↗ |
| 8-K | 2026-01-08 | 2026-01-05 | 0001193125-26-007673 ↗ |
| 10-Q | 2025-11-06 | 2025-09-30 | 0001193125-25-269678 ↗ |
| 8-K | 2025-11-06 | 2025-11-06 | 0001193125-25-269612 ↗ |
| 8-K | 2025-10-03 | 2025-09-29 | 0001193125-25-230103 ↗ |
| 10-Q | 2025-09-04 | 2025-06-30 | 0000950170-25-113026 ↗ |
| 8-K | 2025-09-04 | 2025-09-04 | 0000950170-25-113025 ↗ |