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Cerebras Systems Inc. planned insider sales

In the last twelve months insiders at Cerebras Systems Inc. filed 15 Form 144 notices of planned sales, 1.9 million shares worth $398.0 million at the time of filing, from 9 sellers. The latest, filed 27 October 2026: Sean Lie (officer), 60,000 shares worth $6.5 million, planned for around 27 October 2026 through Morgan Stanley Smith Barney LLC Executive Financial Services.

FiledSellerRelationshipSharesValuePlanned saleSold, per Form 4BrokerHow acquiredFiling
27 October 2026Sean LieOfficer60,000$6.5 million27 October 202660,000 shares from 27 October 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock Options; Performance Stock UnitsForm 144
29 September 2026Robert KominOfficer32,500$6.4 million29 September 202632,500 shares from 29 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesPreviously Exercised Stock OptionsForm 144
29 September 2026Dhiraj MallickOfficer396,000$77.9 million29 September 2026396,000 shares from 29 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock Options; Performance Stock UnitsForm 144
25 September 2026Sean LieOfficer120,000$24.8 million25 September 2026120,000 shares from 25 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock OptionsForm 144
4 September 2026Andrew FeldmanDirector, Officer37,441$7.1 million4 September 202637,441 shares from 4 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock OptionsForm 144
4 September 2026Vassallo Family Revocable Trust dated 7/15/02Director50,000$9.5 million4 September 2026None on Form 4 yetMerrill LynchPrivate PlacementForm 144
4 September 2026Sean LieOfficer53,460$10.2 million4 September 202653,460 shares from 4 September 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock Options; Performance Stock UnitsForm 144
21 August 2026Sean LieOfficer, 10% Stockholder16,293$3.4 million21 August 2026726,540 shares from 20 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock OptionsForm 144
21 August 2026Andrew FeldmanDirector, Officer237,559$49.9 million21 August 2026237,559 shares from 21 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesExercise of Stock OptionsForm 144
20 August 2026Sean LieOfficer710,247$153.2 million20 August 2026None on Form 4 yetMorgan Stanley Smith Barney LLC Executive Financial ServicesPerformance Stock UnitsForm 144
18 August 2026Sean LieOfficer21,257$5.4 million18 August 202621,257 shares from 18 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesVesting of restricted stock unitsForm 144
18 August 2026Andrew D. FeldmanOfficer, Director26,644$6.7 million18 August 202626,644 shares from 18 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesVesting of restricted stock unitsForm 144
18 August 2026Dhiraj MallickOfficer38,889$9.8 million18 August 202638,889 shares from 18 August 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesVesting of restricted stock unitsForm 144
17 August 2026Vishria Eric10% Stockholder68,268$15.7 million17 August 202668,268 shares from 17 August 2026Raymond James & AssociatesReceived in connection with pro-rata distributions for no consideratForm 144
14 August 2026Vassallo Family Revocable Trust dated 7/15/02Director50,000$11.6 million14 August 2026None on Form 4 yetMerrill LynchPrivate PlacementForm 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?