Ambiq Micro (AMBQ) stock: insider trades, news & valuation
Heavy selling
Close · Oct 9, 2026
$58.56
-0.6% on the day
+81.4% over 12 months
52-week range $22.76 – $90.48
Share price and insider trades
AMBQ closeInsider buyInsider sale
Bought, 12 months$0
Sold, 12 months$37.5M
Insiders buying0
Insiders selling8
Ambiq Micro insider trading at a glance (Oct 9, 2026): in the past 12 months, 0 insiders bought $0 and 8 sold $37.5M of AMBQ stock on the open market.
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AMBQ insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | $3.1M | 16 |
| Q3 2026 | — | 0 | $17.6M | 34 |
| Q2 2026 | — | 0 | $16.3M | 14 |
| Q1 2026 | — | 0 | $552K | 2 |
Valuation, profit and volume
P/E (trailing)n/aSector median —
Market value—
Profit margin—Revenue growth —
Volume vs. 50-day0.9×Last 5 sessions
Insiders' paper profit—On all tracked purchases —
Summary
Over the past 12 months, 0 Ambiq Micro, Inc. insiders reported open-market purchases totaling $0, while 8 insiders reported sales totaling $37.5M. 35 of 66 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
AMBQ earnings: how the stock reacted
Each quarterly results release (SEC 8-K Item 2.02), the trend before it, insider trades in the 30 days before, and the 2-day market reaction. “E” marks releases on the chart above.
| Release | 15 days before | Insiders, 30 days before | Reaction (2 days) | Next 30 days |
|---|---|---|---|---|
| Aug 11, 2026 | -9.0% | None | +2.6%S&P -0.1% | -3.2% |
| May 12, 2026 | +28.7% | None | +56.1%S&P +0.4% | +18.8% |
| Mar 5, 2026 | -5.3% | None | +1.1%S&P -1.9% | +0.5% |
| Jan 21, 2026 | +7.7% | None | -1.0%S&P +1.7% | -9.1% |
| Nov 6, 2025 | -11.0% | None | -4.0%S&P -1.0% | +6.3% |
| Sep 4, 2025 | +6.5% | None | -10.3%S&P +0.5% | -13.4% |
Most companies bar insiders from trading in the weeks before results, so pre-earnings purchases are rare and often made by directors or under pre-set plans. Past reactions don't predict future ones.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Oct 6SEC | Fumihide EsakaCEO | Sell | 8,585444,762 held (−2%) | $69.77 | $599K | -16.1% | — |
| Oct 6SEC | Fumihide EsakaCEO | Sell | 7,113453,347 held (−2%) | $69.11 | $492K | -15.3% | — |
| Oct 6SEC | Sean Chihhsiang ChenCOO, President | Sell Plan | 5,508108,965 held (−5%) | $66.38 | $366K | -11.8% | — |
| Oct 6SEC | Scott Mclean HansonCTO | Sell | 4,500212,998 held (−2%) | $69.77 | $314K | -16.1% | — |
| Oct 6SEC | Scott Mclean HansonCTO | Sell | 3,728217,498 held (−2%) | $69.11 | $258K | -15.3% | — |
| Oct 6SEC | Sean Chihhsiang ChenCOO, President | Sell Plan | 3,008114,775 held (−3%) | $69.77 | $210K | -16.1% | — |
| Oct 6SEC | Jeffrey G WinzelerCFO | Sell | 2,828101,128 held (−3%) | $69.77 | $197K | -16.1% | — |
| Oct 6SEC | Sean Chihhsiang ChenCOO, President | Sell Plan | 2,492117,783 held (−2%) | $69.11 | $172K | -15.3% | — |
| Oct 6SEC | Jeffrey G WinzelerCFO | Sell | 2,343103,956 held (−2%) | $69.11 | $162K | -15.3% | — |
| Oct 6SEC | Sean Chihhsiang ChenCOO, President | Sell Plan | 1,797107,168 held (−2%) | $67.29 | $121K | -13.0% | — |
| Oct 6SEC | Fumihide EsakaCEO | Sell | 862443,900 held (−0%) | $71.86 | $62K | -18.5% | — |
| Oct 6SEC | Sean Chihhsiang ChenCOO, President | Sell Plan | 800106,368 held (−1%) | $68.08 | $54K | -14.0% | — |
| Oct 6SEC | Scott Mclean HansonCTO | Sell | 452212,546 held (−0%) | $71.86 | $32K | -18.5% | — |
| Oct 6SEC | Sean Chihhsiang ChenCOO, President | Sell Plan | 302114,473 held (−0%) | $71.86 | $22K | -18.5% | — |
| Oct 6SEC | Jeffrey G WinzelerCFO | Sell | 284100,844 held (−0%) | $71.86 | $20K | -18.5% | — |
| Oct 6SEC | Sean Chihhsiang ChenCOO, President | Sell Plan | 100106,268 held (−0%) | $69.51 | $7K | -15.8% | — |
| Sep 17SEC | Scott Mclean HansonCTO | Sell Plan | 4,947221,326 held (−2%) | $60.56 | $300K | -3.3% | — |
| Sep 17SEC | Scott Mclean HansonCTO | Sell Plan | 1,953226,273 held (−1%) | $59.53 | $116K | -1.6% | — |
| Sep 17SEC | Scott Mclean HansonCTO | Sell Plan | 100221,226 held (−0%) | $61.00 | $6K | -4.0% | — |
| Sep 15SEC | Fumihide EsakaCEO | Sell Plan | 42,083468,377 held (−8%) | $63.27 | $2.7M | -7.4% | — |
| Sep 15SEC | Sean Chihhsiang ChenCOO, President | Sell Plan | 11,000121,675 held (−8%) | $60.24 | $663K | -2.8% | — |
| Sep 15SEC | Fumihide EsakaCEO | Sell Plan | 9,615460,560 held (−2%) | $60.55 | $582K | -3.3% | — |
| Sep 15SEC | Ker ZhangDirector | Sell | 9,10021,266 held (−30%) | $63.39 | $577K | -7.6% | — |
| Sep 15SEC | Fumihide EsakaCEO | Sell Plan | 7,917460,460 held (−2%) | $63.86 | $506K | -8.3% | — |
| Sep 15SEC | Fumihide EsakaCEO | Sell Plan | 3,785470,175 held (−1%) | $59.56 | $225K | -1.7% | — |
| Sep 15SEC | Sean Chihhsiang ChenCOO, President | Sell Plan | 2,600132,675 held (−2%) | $59.36 | $154K | -1.3% | — |
| Sep 15SEC | Sean Chihhsiang ChenCOO, President | Sell Plan | 1,400120,275 held (−1%) | $60.83 | $85K | -3.7% | — |
| Sep 15SEC | Ker ZhangDirector | Sell | 90020,366 held (−4%) | $63.95 | $58K | -8.4% | — |
| Sep 15SEC | Fumihide EsakaCEO | Sell Plan | 100460,460 held (−0%) | $61.00 | $6K | -4.0% | — |
| Sep 9SEC | Sean Chihhsiang ChenCOO, President | Sell Plan | 12,874122,401 held (−10%) | $57.09 | $735K | +2.6% | — |
| Sep 9SEC | Sean Chihhsiang ChenCOO, President | Sell Plan | 2,126120,275 held (−2%) | $57.68 | $123K | +1.5% | — |
| Sep 9SEC | Ker ZhangDirector | Sell | 18530,366 held (−1%) | $56.92 | $11K | +2.9% | — |
| Sep 2SEC | Fumihide EsakaCEO | Sell Plan | 48,973460,460 held (−10%) | $56.39 | $2.8M | +3.8% | — |
| Sep 2SEC | Fumihide EsakaCEO | Sell Plan | 15,600479,860 held (−3%) | $56.81 | $886K | +3.1% | — |
| Sep 2SEC | Fumihide EsakaCEO | Sell Plan | 13,800466,060 held (−3%) | $57.70 | $796K | +1.5% | — |
| Sep 2SEC | Fumihide EsakaCEO | Sell Plan | 9,575460,460 held (−2%) | $56.77 | $544K | +3.2% | — |
| Sep 2SEC | Fumihide EsakaCEO | Sell Plan | 5,899458,790 held (−1%) | $56.87 | $335K | +3.0% | — |
| Sep 2SEC | Fumihide EsakaCEO | Sell Plan | 5,600460,460 held (−1%) | $58.46 | $327K | +0.2% | — |
| Sep 2SEC | Fumihide EsakaCEO | Sell Plan | 5,501453,289 held (−1%) | $57.75 | $318K | +1.4% | — |
| Sep 2SEC | Fumihide EsakaCEO | Sell Plan | 2,100451,189 held (−0%) | $58.52 | $123K | +0.1% | — |
| Sep 2SEC | Fumihide EsakaCEO | Sell Plan | 1,452470,035 held (−0%) | $56.15 | $82K | +4.3% | — |
| Aug 28SEC | Scott Mclean HansonCTO | Sell | 27,500221,226 held (−11%) | $59.58 | $1.6M | -1.7% | — |
| Aug 28SEC | Scott Mclean HansonCTO | Sell | 22,590226,136 held (−9%) | $59.69 | $1.3M | -1.9% | — |
| Aug 28SEC | Scott Mclean HansonCTO | Sell | 4,910221,226 held (−2%) | $60.32 | $296K | -2.9% | — |
| Aug 18SEC | Fumihide EsakaCEO | Sell Plan | 10,718452,689 held (−2%) | $64.40 | $690K | -9.1% | — |
| Aug 18SEC | Scott Mclean HansonCTO | Sell Plan | 5,400212,026 held (−2%) | $64.41 | $348K | -9.1% | — |
| Aug 18SEC | Fumihide EsakaCEO | Sell Plan | 1,500451,189 held (−0%) | $65.26 | $98K | -10.3% | — |
| Aug 18SEC | Fumihide EsakaCEO | Sell Plan | 1,282463,407 held (−0%) | $63.29 | $81K | -7.5% | — |
| Aug 18SEC | Scott Mclean HansonCTO | Sell Plan | 800211,226 held (−0%) | $65.30 | $52K | -10.3% | — |
| Aug 18SEC | Scott Mclean HansonCTO | Sell Plan | 800217,426 held (−0%) | $63.26 | $51K | -7.4% | — |
| May 29SEC | Timothy ChenDirector | Sell | 24,24823,930 held (−50%) | $79.72 | $1.9M | -26.5% | — |
| May 29SEC | Timothy ChenDirector | Sell | 22,41448,178 held (−32%) | $78.85 | $1.8M | -25.7% | — |
| May 29SEC | Timothy ChenDirector | Sell | 20,6663,264 held (−86%) | $80.61 | $1.7M | -27.4% | — |
| May 29SEC | Timothy ChenDirector | Sell | 3,264 | $81.57 | $266K | -28.2% | — |
| May 18SEC | Fumihide EsakaCEO | Sell | 60,000391,189 held (−13%) | $70.02 | $4.2M | -16.4% | — |
| May 18SEC | Sean Chihhsiang ChenCOO, President | Sell | 32,351143,609 held (−18%) | $70.53 | $2.3M | -17.0% | — |
| May 18SEC | Jeffrey G WinzelerCFO | Sell | 25,91894,477 held (−22%) | $69.90 | $1.8M | -16.2% | — |
| May 18SEC | Sean Chihhsiang ChenCOO, President | Sell | 23,334120,275 held (−16%) | $71.37 | $1.7M | -17.9% | — |
| May 18SEC | Scott Mclean HansonCTO | Sell | 6,100203,326 held (−3%) | $69.59 | $424K | -15.8% | — |
| May 18SEC | Scott Mclean HansonCTO | Sell | 3,900209,426 held (−2%) | $68.62 | $268K | -14.7% | — |
| May 18SEC | Scott Mclean HansonCTO | Sell | 200203,126 held (−0%) | $70.50 | $14K | -16.9% | — |
| May 18SEC | Jeffrey G WinzelerCFO | Sell | 8294,395 held (−0%) | $70.65 | $6K | -17.1% | — |
| Apr 6SEC | Michele Kim ConnorsGeneral Counsel | Sell | 66060,705 held (−1%) | $26.04 | $17K | +124.9% | — |
| Apr 6SEC | Michele Kim ConnorsGeneral Counsel | Sell | 15160,554 held (−0%) | $26.65 | $4K | +119.7% | — |
| Jan 28SEC | Scott Mclean HansonCTO | Sell | 10,000122,818 held (−8%) | $31.00 | $310K | +88.9% | — |
| Jan 28SEC | Joseph A TautgesDirector | Sell | 7,80048,746 held (−14%) | $31.00 | $242K | +88.9% | — |
Insiders at Ambiq Micro, Inc.
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Fumihide EsakaCEO | — | $16.4M | Oct 6, 2026 | — |
| Sean Chihhsiang ChenCOO, President | — | $6.7M | Oct 6, 2026 | — |
| Scott Mclean HansonCTO | — | $5.8M | Oct 6, 2026 | — |
| Timothy ChenDirector | — | $5.6M | May 29, 2026 | — |
| Jeffrey G WinzelerCFO | — | $2.2M | Oct 6, 2026 | — |
| Ker ZhangDirector | — | $645K | Sep 15, 2026 | — |
| Joseph A TautgesDirector | — | $242K | Jan 28, 2026 | — |
| Michele Kim ConnorsGeneral Counsel | — | $21K | Apr 6, 2026 | — |
AMBQ stock: common questions
Are Ambiq Micro, Inc. insiders buying AMBQ stock?
In the past 12 months, 0 insiders reported open-market purchases of AMBQ worth $0.
Are Ambiq Micro, Inc. insiders selling AMBQ stock?
8 insiders reported sales worth $37.5M over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is AMBQ's 52-week range?
Over the past year AMBQ has traded between $22.76 and $90.48. It last closed at $58.56 on Oct 9, 2026.