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CBRS insider trading — Cerebras Systems Inc.

Over the last 90 days, insiders at Cerebras Systems Inc. (CBRS) made 0 open-market purchases worth $0 and 11 open-market sales worth $259.23M, making them net sellers by $259.23M. The largest sale was by Lie Sean (Chief Technology Officer), who sold 710,247 shares for $147.63M on Aug 20, 2026.

Updated Oct 16, 2026.

Insider buying · 90d
$0
Insider selling · 90d
$259.23M
Net · 90d
−$259.23M
Last 30 days
0B / 0S

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Recent CBRS insider transactions

Every Form 4 filed by Cerebras Systems Inc. officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.

Trade dateInsiderRoleTypeOwnershipSharesPriceValueFiling
Oct 5, 2026Vishria EricDirectorJ · Other · 10b5-1Indirect59,126——Form 4
Oct 5, 2026Feldman Andrew D.CEO, PresidentJ · OtherIndirect159——Form 4
Sep 30, 2026Susan LiorDirectorJ · OtherIndirect1,198,489——Form 4
Sep 30, 2026Susan LiorDirectorJ · OtherDirect68,428——Form 4
Sep 30, 2026Susan LiorDirectorJ · OtherIndirect63,056——Form 4
Sep 29, 2026Komin Robert Patrick Jr.Chief Financial OfficerS · Sale · 10b5-1Direct32,500$203.53$6.61MForm 4
Sep 29, 2026Mallick DhirajChief Operating OfficerC · Conversion · 10b5-1Direct276,000——Form 4
Sep 29, 2026Mallick DhirajChief Operating OfficerS · Sale · 10b5-1Direct396,000$204.04$80.80MForm 4
Sep 28, 2026Patel YagneshChief Accounting OfficerS · Sale · 10b5-1Direct1,320$204.50$270KForm 4
Sep 25, 2026Lie SeanChief Technology OfficerC · Conversion · 10b5-1Direct120,000——Form 4
Sep 25, 2026Lie SeanChief Technology OfficerG · Gift · 10b5-1Direct36,000——Form 4
Sep 25, 2026Lie SeanChief Technology OfficerS · Sale · 10b5-1Direct120,000$208.97$25.08MForm 4
Sep 23, 2026Susan LiorDirectorJ · OtherIndirect451,118——Form 4
Sep 23, 2026Susan LiorDirectorJ · OtherDirect25,757——Form 4
Sep 23, 2026Susan LiorDirectorJ · OtherIndirect23,735——Form 4
Sep 21, 2026Feldman Andrew D.CEO, PresidentJ · OtherIndirect120——Form 4
Sep 21, 2026Vishria EricDirectorJ · Other · 10b5-1Indirect44,507——Form 4
Sep 15, 2026Susan LiorDirectorJ · OtherIndirect451,115——Form 4
Sep 15, 2026Susan LiorDirectorJ · OtherDirect24,463——Form 4
Sep 15, 2026Susan LiorDirectorJ · OtherIndirect23,734——Form 4
Sep 8, 2026Vishria EricDirectorJ · Other · 10b5-1Indirect44,507——Form 4
Sep 4, 2026Vassallo StevenDirectorS · SaleIndirect50,000$210.30$10.52MForm 4
Sep 4, 2026Lie SeanChief Technology OfficerC · ConversionDirect46,141——Form 4
Sep 4, 2026Lie SeanChief Technology OfficerG · GiftDirect16,038——Form 4
Sep 4, 2026Lie SeanChief Technology OfficerS · SaleDirect53,460$210.16$11.24MForm 4
Sep 8, 2026Feldman Andrew D.CEO, PresidentJ · OtherIndirect120——Form 4
Sep 4, 2026Feldman Andrew D.CEO, PresidentC · ConversionDirect37,441——Form 4
Sep 4, 2026Feldman Andrew D.CEO, PresidentS · SaleDirect37,441$210.46$7.88MForm 4
Sep 2, 2026Susan LiorDirectorJ · OtherIndirect902,236——Form 4
Sep 2, 2026Susan LiorDirectorJ · OtherDirect46,455——Form 4
Sep 2, 2026Susan LiorDirectorJ · OtherIndirect47,470——Form 4
Aug 24, 2026Vishria EricDirectorJ · Other · 10b5-1Indirect44,507——Form 4
Aug 24, 2026Benchmark Capital Management Co. Viii, L.L.C., Benchmark Capital Partners Viii, L.P., Benchmark Founders' Fund Viii, L.P., Benchmark Founders' Fund Viii-B, L.P., Benchmark Capital Management Co. Ix, L.L.C., Benchmark Capital Partners Ix, L.P., Benchmark Founders' Fund Ix, L.P., Benchmark Founders' Fund Ix-A, L.P., Benchmark Founders' Fund Ix-B, L.P.10% OwnerC · Conversion · 10b5-1Indirect963,818——Form 4
Aug 24, 2026Benchmark Capital Management Co. Viii, L.L.C., Benchmark Capital Partners Viii, L.P., Benchmark Founders' Fund Viii, L.P., Benchmark Founders' Fund Viii-B, L.P., Benchmark Capital Management Co. Ix, L.L.C., Benchmark Capital Partners Ix, L.P., Benchmark Founders' Fund Ix, L.P., Benchmark Founders' Fund Ix-A, L.P., Benchmark Founders' Fund Ix-B, L.P.10% OwnerJ · Other · 10b5-1Indirect963,818——Form 4
Aug 21, 2026Vassallo StevenDirectorC · ConversionIndirect1,224,187——Form 4
Aug 21, 2026Vassallo StevenDirectorJ · OtherIndirect1,530,274——Form 4
Aug 21, 2026Vassallo StevenDirectorJ · OtherIndirect407,803——Form 4
Aug 21, 2026Foundation Capital Management Co. Viii, L.L.C., Foundation Capital Viii, L.P., Foundation Capital Viii Principals Fund, L.L.C., Foundation Capital Management Co. Lf Ii, L.L.C., Foundation Capital Leadership Fund Ii, L.P.10% OwnerC · ConversionIndirect1,224,187——Form 4
Aug 21, 2026Foundation Capital Management Co. Viii, L.L.C., Foundation Capital Viii, L.P., Foundation Capital Viii Principals Fund, L.L.C., Foundation Capital Management Co. Lf Ii, L.L.C., Foundation Capital Leadership Fund Ii, L.P.10% OwnerJ · OtherIndirect1,530,274——Form 4
Aug 21, 2026Foundation Capital Management Co. Viii, L.L.C., Foundation Capital Viii, L.P., Foundation Capital Viii Principals Fund, L.L.C., Foundation Capital Management Co. Lf Ii, L.L.C., Foundation Capital Leadership Fund Ii, L.P.10% OwnerJ · OtherIndirect306,087——Form 4
Aug 24, 2026Feldman Andrew D.CEO, PresidentJ · OtherIndirect120——Form 4
Aug 21, 2026Feldman Andrew D.CEO, PresidentG · GiftDirect50,000——Form 4
Aug 21, 2026Feldman Andrew D.CEO, PresidentC · ConversionDirect237,559——Form 4
Aug 21, 2026Feldman Andrew D.CEO, PresidentS · SaleDirect237,559$199.27$47.34MForm 4
Aug 21, 2026Lie SeanChief Technology OfficerC · ConversionDirect16,293——Form 4
Aug 21, 2026Lie SeanChief Technology OfficerS · SaleDirect16,293$210.01$3.42MForm 4
Aug 20, 2026Lie SeanChief Technology OfficerC · ConversionDirect696,798——Form 4
Aug 20, 2026Lie SeanChief Technology OfficerG · GiftDirect213,074——Form 4
Aug 20, 2026Lie SeanChief Technology OfficerS · SaleDirect710,247$207.86$147.63MForm 4
Aug 19, 2026Susan LiorDirectorJ · OtherIndirect902,235——Form 4
Aug 19, 2026Susan LiorDirectorJ · OtherDirect46,422——Form 4
Aug 19, 2026Susan LiorDirectorJ · OtherIndirect46,780——Form 4
Aug 18, 2026Vassallo StevenDirectorC · ConversionIndirect1,912,792——Form 4
Aug 18, 2026Vassallo StevenDirectorJ · OtherIndirect2,392,418——Form 4
Aug 18, 2026Vassallo StevenDirectorJ · OtherIndirect637,594——Form 4
Aug 18, 2026Foundation Capital Management Co. Viii, L.L.C., Foundation Capital Viii, L.P., Foundation Capital Viii Principals Fund, L.L.C., Foundation Capital Management Co. Lf Ii, L.L.C., Foundation Capital Leadership Fund Ii, L.P.10% OwnerC · ConversionIndirect1,912,792——Form 4
Aug 18, 2026Foundation Capital Management Co. Viii, L.L.C., Foundation Capital Viii, L.P., Foundation Capital Viii Principals Fund, L.L.C., Foundation Capital Management Co. Lf Ii, L.L.C., Foundation Capital Leadership Fund Ii, L.P.10% OwnerJ · OtherIndirect2,392,418——Form 4
Aug 18, 2026Foundation Capital Management Co. Viii, L.L.C., Foundation Capital Viii, L.P., Foundation Capital Viii Principals Fund, L.L.C., Foundation Capital Management Co. Lf Ii, L.L.C., Foundation Capital Leadership Fund Ii, L.P.10% OwnerJ · OtherIndirect478,258——Form 4
Aug 18, 2026Komin Robert Patrick Jr.Chief Financial OfficerC · ConversionDirect32,500——Form 4
Aug 18, 2026Patel YagneshChief Accounting OfficerC · ConversionDirect6,250——Form 4
Aug 18, 2026Patel YagneshChief Accounting OfficerS · SaleDirect4,574$222.22$1.02MForm 4
Aug 18, 2026Mallick DhirajChief Operating OfficerC · ConversionDirect158,889——Form 4
Aug 18, 2026Mallick DhirajChief Operating OfficerS · SaleDirect38,889$222.22$8.64MForm 4
Aug 18, 2026Lie SeanChief Technology OfficerC · ConversionDirect616,706——Form 4
Aug 18, 2026Lie SeanChief Technology OfficerS · SaleDirect21,257$222.22$4.72MForm 4
Aug 18, 2026Feldman Andrew D.CEO, PresidentC · ConversionDirect93,497——Form 4
Aug 18, 2026Feldman Andrew D.CEO, PresidentS · SaleDirect26,644$222.22$5.92MForm 4
Aug 17, 2026Feldman Andrew D.CEO, PresidentJ · OtherIndirect298——Form 4
Aug 17, 2026Benchmark Capital Management Co. Viii, L.L.C., Benchmark Capital Partners Viii, L.P., Benchmark Founders' Fund Viii, L.P., Benchmark Founders' Fund Viii-B, L.P., Benchmark Capital Management Co. Ix, L.L.C., Benchmark Capital Partners Ix, L.P., Benchmark Founders' Fund Ix, L.P., Benchmark Founders' Fund Ix-A, L.P., Benchmark Founders' Fund Ix-B, L.P.10% OwnerC · Conversion · 10b5-1Indirect2,402,352——Form 4
Aug 17, 2026Benchmark Capital Management Co. Viii, L.L.C., Benchmark Capital Partners Viii, L.P., Benchmark Founders' Fund Viii, L.P., Benchmark Founders' Fund Viii-B, L.P., Benchmark Capital Management Co. Ix, L.L.C., Benchmark Capital Partners Ix, L.P., Benchmark Founders' Fund Ix, L.P., Benchmark Founders' Fund Ix-A, L.P., Benchmark Founders' Fund Ix-B, L.P.10% OwnerJ · Other · 10b5-1Indirect2,402,352——Form 4
Aug 17, 2026Vishria EricDirectorS · Sale · 10b5-1Indirect68,268$229.77$15.69MForm 4
Aug 17, 2026Vishria EricDirectorJ · Other · 10b5-1Indirect110,950——Form 4
Aug 14, 2026Vassallo StevenDirectorC · ConversionIndirect382,557——Form 4
Aug 14, 2026Vassallo StevenDirectorJ · OtherIndirect2,362,677——Form 4
Aug 14, 2026Vassallo StevenDirectorJ · OtherIndirect601,796——Form 4
Aug 14, 2026Vassallo StevenDirectorS · SaleIndirect50,000$218.18$10.91MForm 4
Jun 24, 2026Vassallo StevenDirectorC · ConversionIndirect1,530,235——Form 4
Aug 14, 2026Foundation Capital Management Co. Viii, L.L.C., Foundation Capital Viii, L.P., Foundation Capital Viii Principals Fund, L.L.C., Foundation Capital Management Co. Lf Ii, L.L.C., Foundation Capital Leadership Fund Ii, L.P.10% OwnerC · ConversionIndirect382,557——Form 4
Aug 14, 2026Foundation Capital Management Co. Viii, L.L.C., Foundation Capital Viii, L.P., Foundation Capital Viii Principals Fund, L.L.C., Foundation Capital Management Co. Lf Ii, L.L.C., Foundation Capital Leadership Fund Ii, L.P.10% OwnerJ · OtherIndirect2,362,677——Form 4
Aug 14, 2026Foundation Capital Management Co. Viii, L.L.C., Foundation Capital Viii, L.P., Foundation Capital Viii Principals Fund, L.L.C., Foundation Capital Management Co. Lf Ii, L.L.C., Foundation Capital Leadership Fund Ii, L.P.10% OwnerJ · OtherIndirect451,253——Form 4

Showing the 80 most recent of 84 transactions — see them all in the live tracker.

CBRS insider trading FAQ

Are insiders buying CBRS stock?

Not on the open market. In the last 90 days, Cerebras Systems Inc. insiders made no open-market purchases, and 11 open-market sales totaling $259.23M. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).

Who are the insiders trading CBRS?

Recent sellers: Feldman Andrew D., Lie Sean, Mallick Dhiraj, Patel Yagnesh, Vassallo Steven.

Where does CBRS insider trading data come from?

Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.

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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.