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Ambiq Micro, Inc. planned insider sales

In the last twelve months insiders at Ambiq Micro, Inc. filed 21 Form 144 notices of planned sales, 618,864 shares worth $40.9 million at the time of filing, from 11 sellers. The latest, filed 5 October 2026: Sean Chen (officer), 53,205 shares worth $3.6 million, planned for around 5 October 2026 through Morgan Stanley Smith Barney LLC Executive Financial Services.

FiledSellerRelationshipSharesValuePlanned saleSold, per Form 4BrokerHow acquiredFiling
5 October 2026Sean ChenOfficer53,205$3.6 million5 October 202623,205 shares from 5 October 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock Options; Restricted Stock UnitsForm 144
2 October 2026Jeffrey G. WinzelerOfficer5,455$377,2132 October 20265,455 shares from 2 October 2026Morgan Stanley Smith Barney LLCRestricted Stock UnitsForm 144
2 October 2026Sean Chihhsiang ChenOfficer5,802$401,2082 October 20265,802 shares from 2 October 2026Morgan Stanley Smith Barney LLCRestricted Stock UnitsForm 144
2 October 2026Scott McLean HansonOfficer, Director8,680$600,2222 October 202615,680 shares from 2 October 2026Morgan Stanley Smith Barney LLCRestricted Stock UnitsForm 144
2 October 2026Fumihide EsakaOfficer, Director16,560$1.1 million2 October 202621,560 shares from 2 October 2026Morgan Stanley Smith Barney LLCRestricted Stock UnitsForm 144
11 September 2026Ker ZhangDirector10,000$634,36111 September 202610,000 shares from 11 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Vesting Under a Registered PlanForm 144
11 September 2026Fumihide EsakaOfficer, Director50,000$3.2 million11 September 202663,500 shares from 11 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Options Under a Registered PlanForm 144
4 September 2026Ker ZhangDirector185$10,5304 September 2026185 shares from 4 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Options Under a Registered PlanForm 144
4 September 2026Sean ChenOfficer30,000$1.7 million4 September 202630,000 shares from 4 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock OptionsForm 144
2 September 2026Fumihide (Humi) EsakaOfficer, Director11,027$625,1082 September 202660,000 shares from 1 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Options Under a Registered PlanForm 144
1 September 2026Fumihide (Humi) EsakaOfficer, Director48,973$2.8 million1 September 202648,500 shares from 31 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Options Under a Registered PlanForm 144
31 August 2026Fumihide (Humi) EsakaOfficer, Director35,000$2.0 million31 August 2026None on Form 4 yetMorgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Options Under a Registered PlanForm 144
27 August 2026Scott HansonOfficer27,500$1.6 million27 August 202662,000 shares from 26 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Options Under a Registered PlanForm 144
26 August 2026Scott HansonOfficer27,500$1.6 million26 August 2026None on Form 4 yetMorgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Options Under a Registered PlanForm 144
14 August 2026Scott HansonDirector, Officer21,000$1.4 million14 August 20267,000 shares from 14 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock OptionsForm 144
14 August 2026Fumihide EsakaDirector, Officer45,500$2.9 million14 August 202613,500 shares from 14 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock OptionsForm 144
27 May 2026Triumph Way Investment IncDirector70,592$5.6 million27 May 2026No matching Form 4 saleUBS Financial Services IncPrivate InvestmentForm 144
15 May 2026Sean ChenOfficer55,685$3.9 million15 May 202655,685 shares from 15 May 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of options under a registered planForm 144
14 May 2026Scott HansonOfficer10,200$706,25214 May 202610,200 shares from 14 May 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of options under a registered planForm 144
14 May 2026Jeff G WinzelerOfficer26,000$1.8 million14 May 202626,000 shares from 14 May 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of options under a registered planForm 144
14 May 2026Fumihide EsakaOfficer60,000$4.2 million14 May 202660,000 shares from 14 May 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of options under a registered planForm 144
A Form 144 is the notice an insider files with the SEC before selling restricted or control shares over the Rule 144 thresholds; it says what may be sold, not what was.
Read moreValue is the filer's own aggregate market value. Sold, per Form 4: the same seller's open-market sales on Form 4 from the notice's date to 90 days after, added up, as they appear on the insiders page; a holder who files no Form 4, such as some large holders, never shows one. What is a Form 144?