Total buying$00 buys
CBRS
Cerebras Systems Inc.
NasdaqTechnologySemiconductors & Related Devices
Insider activity for last month from 09/24 to 10/24.
How these metrics are calculated
Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total selling$112M45 sells
Net open-market−$112MBuying minus selling
Active insiders7Distinct reporting owners
Insider activity report
Calendar-month buckets within the selected date range
Latest filing: Oct 07, 2026
Open-market transaction mix · 45 transactions in the selected period
Code A includes awards, grants and other acquisitions; these are not open-market buys. A rolling period can include partial calendar months.
View exact monthly counts and disclosed values
| Month | Buys | Sells | Awards (A) | Buy value | Sell value | Net P/S value |
|---|---|---|---|---|---|---|
| Sep 2026 | 0 | 45 | 0 | $0 | $112M | -$112M |
| Oct 2026 | 0 | 0 | 0 | $0 | $0 | $0 |
Distinct insiders active
Reporting-owner CIKs by month · peak Sep 2026 (5)Sep 2026Oct 2026
Largest insider activity
By absolute net disclosed value · current transaction page- KJ-$6.2M
- VE+$0
- FD+$0
- SL—
CBRS transaction history
Newest filings · 20 transactions per pageLatest insider transactions
Form 4 filings from last month.Filing-only signals
Deterministic matches in the selected period
Filing detail checks
Secondary metrics for the selected periodTransaction codes
By Form 4 transaction code in selected period60transactionstxns
- S · Open-market sells · dominant45 · 75%
- J · Other5 · 8%
- M · Option exercise5 · 8%
- C · Code C4 · 7%
- G · Gifts1 · 2%
Activity by reported role
A joint filing can contribute to multiple rolesCOO23
Chief financial officer16
CTO15
Director4
CAO1
Chief executive officer1
PRES1
Reported Holdings After
Separated by insider, security, and ownership type
Mallick DhirajClass A Common Stock · Direct
0Sep 29, 2026
Komin Robert Patrick Jr.Class A Common Stock · Direct
0Sep 29, 2026
Lie SeanClass A Common Stock · Direct
309,569Sep 25, 2026
Lie SeanStock Option · Direct
32,420Sep 25, 2026
Lie SeanClass B Common Stock · Direct
7,582,992Sep 25, 2026
Mallick DhirajClass B Common Stock · Direct
520,807Sep 29, 2026
Susan LiorClass A Common Stock · Indirect · See footnote
372,659Sep 30, 2026
Patel YagneshClass A Common Stock · Direct
15,356Sep 28, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Current transaction page only · each cell is a filing date · buys green, sells redSep 24 → Oct 24
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Cerebras Systems Inc. Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at Cerebras Systems Inc.?
Vishria Eric, Feldman Andrew D., Susan Lior, Komin Robert Patrick Jr., Mallick Dhiraj, Patel Yagnesh, Lie Sean.
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
Komin Robert Patrick Jr. reported a sale on Sep 29, 2026 valued at $584k. Read the SEC filing.
What is the recent purchase and sale balance?
Net open-market selling in the selected period was $112,759,689.90. Sales can occur for many non-investment reasons.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.