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SEC Form 4 research

Cerebras Systems Inc. insider transactions

Inspect Cerebras Systems Inc.'s public SEC insider acquisitions and sales, reporting owners and source receipts.

As of 2026-10-15T08:02:39.132Z

Issuer CIK
0002021728
Reporting owners
27
Officers and directors
7
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What is a Form 4?

Animation: what a Form 4 is, shown with one real example. Sonic Automotive (SAH) reporting owner Paul P. Rusnak bought 13,701 shares at $59.78 on Wednesday, October 7, 2026, transaction code P, an open-market purchase (S is a sale and A is an award from the company). A timeline marks the SEC's two-business-day filing deadline, which ends Friday, October 9. The SEC accepted the Form 4 at 4:33:21 PM ET on October 9, and NexusTrade treats it as public one minute later, at 4:34:21 PM ET. A lamp for NexusTrade's InsiderTrades indicator stays off from the trade date until that moment, then counts one purchase worth 13,701 × $59.78 = $819,045.78.
In this example the shares were bought on Oct 7, 2026, and NexusTrade's InsiderTrades indicator can count the purchase starting at 4:34:21 PM ET on Oct 9, one minute after the SEC accepted the Form 4.

A Form 4 is the SEC filing a company insider, such as an officer, director or 10% owner, uses to report a trade in the company's stock, generally within two business days. The animation follows one real filing as an example: Paul P. Rusnak's purchase of Sonic Automotive (SAH) shares on October 7, 2026.

The same reading applies to every row on this page. The trade date is when the shares changed hands. The available date is when NexusTrade treats the filing as public, and a NexusTrade InsiderTrades indicator counts a purchase (code P) or sale (code S) only from that moment. Code A awards are not counted as purchases.

Read one actual disclosure before using it

Show the table · 1 row, 7 columns

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2026-09-302026-09-29Komin Robert Patrick Jr.S800$203.48Not reported

First displayed source row from Recent insider disclosures. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-09-29 and its public availability date is 2026-09-30. Subtracting those calendar dates gives 1 day of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code S: a sale. A purchase-following rule excludes this sale even if the reported dollar amount is large.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

SEC accession 0001628280-26-064044 ↗SEC accession 0001628280-26-064044 ↗SEC accession 0001628280-26-064044 ↗

Recent insider disclosures

Inspect all 50 displayed rows: Recent insider disclosures

This table includes purchases, sales and awards in the public filing record. Awards and open-market purchases are distinct transaction codes. For historical research, use the public availability date to determine when the transaction was knowable.

Read code P as a purchase, S as a sale and A as an award. An award is an acquisition, but it is not an open-market purchase. Open the filing receipt to check the transaction details.

Scroll sideways to compare all columns. Select a heading to sort.

2026-09-302026-09-29Komin Robert Patrick Jr.S800$203.48Not reported
2026-09-302026-09-29Komin Robert Patrick Jr.S1,600$204.26Not reported
2026-09-302026-09-29Komin Robert Patrick Jr.S600$205.47Not reported
2026-09-302026-09-29Komin Robert Patrick Jr.S800$206.68Not reported
2026-09-302026-09-29Komin Robert Patrick Jr.S700$207.83Not reported
2026-09-302026-09-29Komin Robert Patrick Jr.S2,197$208.98Not reported
2026-09-302026-09-29Komin Robert Patrick Jr.S2,802$210.02Not reported
2026-09-302026-09-29Komin Robert Patrick Jr.S2,771$211.03Not reported
2026-09-302026-09-29Komin Robert Patrick Jr.S3,000$194.92Not reported
2026-09-302026-09-29Komin Robert Patrick Jr.S1,115$195.61Not reported
2026-09-302026-09-29Komin Robert Patrick Jr.S685$197.48Not reported
2026-09-302026-09-29Komin Robert Patrick Jr.S870$198.7Not reported
2026-09-302026-09-29Komin Robert Patrick Jr.S1,130$199.8Not reported
2026-09-302026-09-29Komin Robert Patrick Jr.S11,200$201.22Not reported
2026-09-302026-09-29Komin Robert Patrick Jr.S400$201.96Not reported
2026-09-302026-09-29Komin Robert Patrick Jr.S1,830$211.79Not reported
2026-09-302026-09-29Mallick DhirajS9,047$206.13Not reported
2026-09-302026-09-29Mallick DhirajS9,652$207.06Not reported
2026-09-302026-09-29Mallick DhirajS20,714$208.38Not reported
2026-09-302026-09-29Mallick DhirajS41,278$209.33Not reported
2026-09-302026-09-29Mallick DhirajS46,427$210.27Not reported
2026-09-302026-09-29Mallick DhirajS41,391$211.29Not reported
2026-09-302026-09-29Mallick DhirajS18,274$212.2Not reported
2026-09-302026-09-29Mallick DhirajS68,830$194.91Not reported
2026-09-302026-09-29Mallick DhirajS598$212.93Not reported
2026-09-302026-09-29Mallick DhirajS18,703$195.56Not reported
2026-09-302026-09-29Mallick DhirajS6,613$197.05Not reported
2026-09-302026-09-29Mallick DhirajS5,170$197.85Not reported
2026-09-302026-09-29Mallick DhirajS17,000$198.96Not reported
2026-09-302026-09-29Mallick DhirajS17,848$199.89Not reported
2026-09-302026-09-29Mallick DhirajS22,915$200.96Not reported
2026-09-302026-09-29Mallick DhirajS5,637$201.91Not reported
2026-09-302026-09-29Mallick DhirajS9,682$203.37Not reported
2026-09-302026-09-29Mallick DhirajS27,492$204.17Not reported
2026-09-302026-09-29Mallick DhirajS8,729$205.17Not reported
2026-09-302026-09-28Patel YagneshS1,320$204.5Not reported
2026-09-282026-09-25Lie SeanS13,776$206.63Not reported
2026-09-282026-09-25Lie SeanS6,869$207.54Not reported
2026-09-282026-09-25Lie SeanS21,022$208.41Not reported
2026-09-282026-09-25Lie SeanS29,991$209.53Not reported
2026-09-282026-09-25Lie SeanS30,565$210.45Not reported
2026-09-282026-09-25Lie SeanS9,177$211.32Not reported
2026-09-282026-09-25Lie SeanS500$212.14Not reported
2026-09-282026-09-25Lie SeanS2,200$204.5Not reported
2026-09-282026-09-25Lie SeanS5,900$205.3Not reported
2026-09-092026-09-04Vassallo StevenS7,110$211.56Not reported
2026-09-092026-09-04Vassallo StevenS21,773$210.37Not reported
2026-09-092026-09-04Vassallo StevenS21,117$209.81Not reported
2026-09-092026-09-04Lie SeanS53,460$210.16Not reported
2026-09-092026-09-04Feldman Andrew D.S1,707$208.84Not reported

Most recent 90-day source activity, up to 50 rows. No rows means no matching recent records, not no historical activity.

Officers and directors in the directory

Show the table · 7 rows, 3 columns

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Feldman Andrew D.000203957367
Komin Robert Patrick Jr.000164880025
Lie Sean000213247263
Mallick Dhiraj0002039572103
Patel Yagnesh000170241070
Vassallo Steven000156792956
Vishria Eric000161747475
Feldman Andrew D. ↗Komin Robert Patrick Jr. ↗Lie Sean ↗Mallick Dhiraj ↗Patel Yagnesh ↗Vassallo Steven ↗Vishria Eric ↗

Which transactions qualify for the company tracker

The company strategy uses verified officers and directors with qualifying acquisitions at this issuer. Other reporting owners may appear in source records without becoming strategy signals.

The source profile remains readable even when the issuer does not meet the company-strategy eligibility rules.

Historical follower simulations are separate from these source transactions. They do not establish live trading results.