CBRS at a glance
Cerebras Systems Inc (CBRS, SEC CIK 2021728) filed a 10-Q quarterly report on August 12, 2026, an 8-K current report on August 12, 2026 and Form 4 insider filings as recently as October 6, 2026. SignalX summarizes each filing with AI and tracks the company's insider trades and institutional holders.
- As of June 30, 2026, 34 institutional investment managers tracked by SignalX reported holding Cerebras Systems Inc (CBRS) shares worth $6.8 billion in 13F-HR filings.
- The most recent insider open-market sale reported on Form 4 was by Komin Robert Patrick Jr. on September 29, 2026 of 1,830 shares at $211.79 per share.
- In the last 90 days, CBRS insiders reported 0 open-market purchases ($0) and 203 open-market sales ($387.7M) on Form 4, a net sale of $387.7M.
Source: SEC EDGAR (XBRL financial data, 13F-HR and Form 4 filings).
- Insiders · 90 days
- 0 buys · 203 sells
- Net −$387.7M
- 13F holders
- 34 funds
- $6.8B
- Latest 10-Q
- Aug 12, 2026
- Quarterly report
SignalX for CBRS
Don't miss the next CBRS filing
- Alerts as it files. A push when CBRS files an 8-K or an insider trades.
- Fund moves. Which tracked funds opened, added or cut CBRS, by share count.
- Ask anything. An AI agent that reads every CBRS filing and answers with sources.
CBRS alerts on your phone. Follow it in the SignalX Android app.
Recent Insider Transactions (Form 4)
Latest reported trades by officers, directors and 10% owners
| Insider | Type | Date | Shares | Price |
|---|---|---|---|---|
| Feldman Andrew D. | J | Oct 5, 2026 | 159 | - |
| Susan Lior | J | Sep 30, 2026 | 1,198,489 | - |
| Susan Lior | J | Sep 30, 2026 | 68,428 | - |
| Susan Lior | J | Sep 30, 2026 | 63,056 | - |
| Komin Robert Patrick Jr. | Sell | Sep 29, 2026 | 1,830 | $211.79 |
| Komin Robert Patrick Jr. | Sell | Sep 29, 2026 | 2,771 | $211.03 |
| Komin Robert Patrick Jr. | Sell | Sep 29, 2026 | 2,802 | $210.02 |
| Komin Robert Patrick Jr. | Sell | Sep 29, 2026 | 2,197 | $208.98 |
13F Fund Holdings: Quarterly Trend
Latest: Q2 2026Aggregate CBRS share value held by 13F filers tracked by SignalX, by quarter.
Quarterly totals table
| Quarter | Funds | Total value |
|---|---|---|
| Q2 2026 | 34 | $6.78B |
Source: 13F-HR filings on SEC EDGAR (aggregated from 34 fund-quarter rows). Reflects only 13F filers tracked by SignalX, not the full institutional ownership universe. How 13F filings work
Latest 2026 SEC Filings: 10-K, 10-Q, 8-K & Form 4
| Form | Filing date | Period | Analysis | SEC |
|---|---|---|---|---|
| 4 | Oct 6, 2026 | - | - | - |
| 4 | Oct 2, 2026 | - | - | - |
| 4 | Sep 30, 2026 | - | - | - |
| 4 | Sep 30, 2026 | - | - | - |
| 4 | Sep 30, 2026 | - | - | - |
| 4 | Sep 28, 2026 | - | - | - |
| 4 | Sep 25, 2026 | - | - | - |
| 4 | Sep 23, 2026 | - | - | - |
| 4 | Sep 23, 2026 | - | - | - |
| 4 | Sep 17, 2026 | - | - | - |
| 4 | Sep 10, 2026 | - | - | - |
| 4 | Sep 8, 2026 | - | - | - |
| 4 | Sep 8, 2026 | - | - | - |
| 4 | Sep 8, 2026 | - | - | - |
| 4 | Sep 4, 2026 | - | - | - |
| 4 | Aug 26, 2026 | - | - | - |
| 4 | Aug 26, 2026 | - | - | - |
| 4 | Aug 25, 2026 | - | - | - |
| 4 | Aug 25, 2026 | - | - | - |
| 4 | Aug 25, 2026 | - | - | - |
| 4 | Aug 21, 2026 | - | - | - |
| 4 | Aug 21, 2026 | - | - | - |
| 4 | Aug 20, 2026 | - | - | - |
| 4 | Aug 20, 2026 | - | - | - |
| 4 | Aug 20, 2026 | - | - | - |
Related Information Technology companies
- AMD · Advanced Micro DevicesSemiconductors & Related Devices
- ALMU · Aeluma, Inc.Semiconductors & Related Devices
- AOSL · ALPHA & OMEGA SEMICONDUCTOR LtdSemiconductors & Related Devices
- AMBA · AMBARELLA INCSemiconductors & Related Devices
- AMBQ · Ambiq Micro, Inc.Semiconductors & Related Devices
- ADI · Analog DevicesSemiconductors & Related Devices
- AMAT · Applied MaterialsSemiconductors & Related Devices
- AAOI · APPLIED OPTOELECTRONICS, INC.Semiconductors & Related Devices
CBRS SEC filings: frequently asked questions
Are CBRS insiders buying or selling?
In the last 90 days, Cerebras Systems Inc (CBRS) officers, directors and 10% owners reported no open-market purchases and 203 open-market sales worth $387.7 million by 7 insiders on Form 4. Many insider sales are pre-planned or for taxes, so purchases usually carry more information.
Which institutions hold CBRS stock?
As of June 30, 2026, the largest Cerebras Systems Inc (CBRS) holders among the 13F filers tracked by SignalX were FMR LLC (Fidelity) ($1.9 billion), Morgan Stanley ($712.6 million), JPMorgan Chase & Co ($670.3 million), Tiger Global Management ($662.8 million), BlackRock ($458.6 million). 13F-HR reports are filed up to 45 days after each quarter ends.
What are the latest CBRS SEC filings?
Cerebras Systems Inc (CBRS) filed a 10-Q quarterly report on August 12, 2026, an 8-K current report on August 12, 2026 and a Form 4 insider filing on October 6, 2026.
What is CBRS's SEC CIK number?
Cerebras Systems Inc (CBRS)'s SEC Central Index Key (CIK) is 2021728. EDGAR lists every CBRS filing under that number.
Ask anything about CBRS
The research agent reads CBRS's filings, financials, insider trades and 13F holders, then answers with sources.