Company · Ownership research

Cerebras Systems Inc. CBRS

CIK 0002021728

Form 4 transactions dated Nov 1, 2023 to Nov 15, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 303 rows; the complete set is available through the API.

Insider filings on file run through Oct 28, 2026.

Some filings are submitted jointly by several insiders. The SEC form does not apportion the reported figures between them, so results include every joint filer.

Insider purchases & sales

Purchased: $0.00
Sold: $415.30M

Nov 1, 2023 – Oct 28, 2026
Available records · partial months are marked ·

202610 of 26 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
Oct 27, 2026	Lie Sean Chief Technology Officer	Sale10b5-1 footnote	$6.95M 60,000 shares sold	18.54% sold Direct holding	▾
Sep 29, 2026	Komin Robert Patrick Jr. Chief Financial Officer	Sale10b5-1 footnote	$6.61M 32,500 shares sold	100.00% sold Direct holding	▾
Sep 29, 2026	Mallick Dhiraj Chief Operating Officer	Sale10b5-1 footnote	$80.80M 396,000 shares sold	100.00% sold Direct holding	▾
Sep 28, 2026	Patel Yagnesh Chief Accounting Officer	Sale10b5-1 footnote	$269.94K 1,320 shares sold	7.92% sold Direct holding	▾
Sep 25, 2026	Lie Sean Chief Technology Officer	Sale10b5-1 footnote	$25.08M 120,000 shares sold	27.93% sold Direct holding	▾
Sep 4, 2026	Vassallo Steven Director	Sale	$10.52M 50,000 shares sold	22.52% sold Trust holding	▾
Sep 4, 2026	Lie Sean Chief Technology Officer	Sale10b5-1 footnote	$11.24M 53,460 shares sold	13.40% sold Direct holding	▾
Sep 4, 2026	Feldman Andrew D. CEO, President · Director	Sale10b5-1 footnote	$7.88M 37,441 shares sold	68.96% sold Direct holding	▾
Aug 21, 2026	Feldman Andrew D. CEO, President · Director	Sale10b5-1 footnote	$47.34M 237,559 shares sold	93.38% sold Direct holding	▾
Aug 21, 2026	Lie Sean Chief Technology Officer	Sale10b5-1 footnote	$3.42M 16,293 shares sold	4.23% sold Direct holding	▾

Showing 26 / 26 record groups in 2026. The complete set is available through the API.

Cerebras Systems Inc. · CBRS

Follow the people behind the trades.

Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and reach other datasets through the Akkru API.

Download CSV
Earlier filings
Advanced screening & filtering
API & AI access

Already have an account?

＋ New accounts get free API credits to explore data beyond ownership filings.

For AI agents & developers

The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 26 of 26 purchase / sale groups and 30 of 303 other groups; the totals and the monthly series cover the whole window.

Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.

MCP  https://api.akkrudata.ai/mcp

akkru_insider_transactions
{"action":"list","ticker":"CBRS","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.

MCP endpoint: https://api.akkrudata.ai/mcp
API / MCP / CLI documentation: /documents
llms.txt: /llms.txt

Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Share totals are on today's split-adjusted basis. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.