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Ambarella Inc. planned insider sales

In the last twelve months insiders at Ambarella Inc. filed 18 Form 144 notices of planned sales, 301,766 shares worth $21.9 million at the time of filing, from 8 sellers. The latest, filed 25 September 2026: Paisley Christopher B (director), 250 shares worth $17,690, planned for around 25 September 2026 through Fidelity Brokerage Services LLC.

FiledSellerRelationshipSharesValuePlanned saleSold, per Form 4BrokerHow acquiredFiling
25 September 2026Paisley Christopher BDirector250$17,69025 September 2026250 shares from 25 September 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
18 September 2026John YoungOfficer1,896$126,86118 September 20265,022 shares from 17 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
9 July 2026Yun-Lung ChenOfficer5,958$468,6569 July 20265,958 shares from 9 July 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesPerformance Stock UnitsForm 144
1 July 2026Chihong John JuOfficer10,000$888,3981 July 202612,009 shares from 1 July 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Vesting Under a Registered PlanForm 144
1 July 2026Feng-Ming WangDirector, Officer16,250$1.4 million1 July 202622,336 shares from 1 July 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
26 June 2026Paisley Christopher BDirector250$15,50226 June 2026250 shares from 26 June 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
17 June 2026John YoungOfficer1,847$123,97117 June 20265,033 shares from 17 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
12 June 2026Yun-Lung ChenOfficer9,856$660,94612 June 20269,856 shares from 12 June 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock Vesting Under a Registered PlanForm 144
26 May 2026John YoungOfficer400$35,02026 May 2026400 shares from 26 May 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock OptionsForm 144
26 May 2026Feng-Ming WangDirector, Officer32,500$2.8 million26 May 202638,704 shares from 26 May 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
21 April 2026John YoungOfficer1,971$116,84121 April 20261,971 shares from 21 April 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted Stock UnitsForm 144
2 March 2026Feng-Ming WangDirector, Officer50,000$3.0 million2 March 202677,059 shares from 2 March 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock OptionsForm 144
5 January 2026Chihong John JuOfficer7,728$584,1035 January 202614,612 shares from 5 January 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesPerformance Stock Units; Restricted stock vesting under a registered plan; Shares Purchased through Employee Stock Purchase PlanForm 144
30 December 2025Chihong John JuOfficer7,945$558,16130 December 20253,765 shares from 30 December 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesPerformance Stock Units; Restricted stock vesting under a registered plan; Shares Purchased through Employee Stock Purchase PlanForm 144
29 December 2025Paisley Christopher BDirector500$36,09026 December 2025No matching Form 4 saleFidelity Brokerage Services LLCRestricted Stock VestingForm 144
18 December 2025John A YoungOfficer3,791$276,59118 December 202510,947 shares from 17 December 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted stock vesting under a registered planForm 144
16 December 2025Elizabeth M SchwartingDirector624$45,16316 December 2025624 shares from 16 December 2025Morgan Stanley Smith Barney LLC Executive Financial ServicesRestricted stock vesting under a registered planForm 144
2 December 2025Leslie KohnOfficer150,000$10.7 million2 December 2025No matching Form 4 saleMorgan Stanley Smith Barney LLC Executive Financial ServicesRestricted stock vesting 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?