Cerebras Systems (CBRS)
Cerebras Systems on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, earnings dates and insider trades. Listed on Nasdaq.
12.8M
Short interest
settlement 2026-09-15
2.2
Days to cover
+0.5 days vs prior
56.9%
Short share of volume
2026-10-08
897
Fails to deliver
settlement 2026-09-14
Tue 22 Jun
Next earnings
estimated date
-$387.7M
Insider flow, 90 days
0 buys, 203 sells
As of 2026-10-08.
Short interest
FINRA, twice a month. The newest 9 settlements in the table. JSONAs of 15 September 2026, short interest in CBRS is 12,802,090 shares, down 3,040,270 shares over the last month. Over the last 9 readings it ranged from 1,899,096 shares (15 May 2026) to 15,842,360 shares (14 August 2026). At the reported average volume of 5.9M shares a day that is 2.2 days to cover.
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-09-15 | 12,802,090 | -4.0% | 5,892,160 | 2.17 |
| 2026-08-31 | 13,332,403 | -15.8% | 7,931,659 | 1.68 |
| 2026-08-14 | 15,842,360 | +22.9% | 6,862,883 | 2.31 |
| 2026-07-31 | 12,895,548 | +23.7% | 5,841,152 | 2.21 |
| 2026-07-15 | 10,424,930 | -23.0% | 5,028,145 | 2.07 |
| 2026-06-30 | 13,533,818 | +66.3% | 9,977,601 | 1.36 |
| 2026-06-15 | 8,137,372 | +37.5% | 5,099,050 | 1.60 |
| 2026-05-29 | 5,918,090 | +211.6% | 8,259,984 | 1.00 |
| 2026-05-15 | 1,899,096 | +100.0% | 4,490,406 | 1.00 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 8 October 2026, the short share of CBRS volume is 56.9%, down 7.5 points over the last five sessions. Over the last 30 readings it ranged from 43.4% (5 October 2026) to 66.8% (16 September 2026). The latest reading is in line with the 30-session average of 56.4%, on 4.5M shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-08 | 2.6M | 4.5M | 56.9% | 11,065 |
| 2026-10-07 | 1.4M | 2.6M | 53.2% | 5,149 |
| 2026-10-06 | 2.5M | 4.3M | 59.8% | 63,910 |
| 2026-10-05 | 3.3M | 7.6M | 43.4% | 11,849 |
| 2026-10-02 | 2.8M | 5.3M | 53.6% | 17,407 |
| 2026-10-01 | 3.1M | 4.8M | 64.4% | 38,694 |
| 2026-09-30 | 3.5M | 5.6M | 63.0% | 57,039 |
| 2026-09-29 | 2.1M | 3.9M | 53.9% | 9,059 |
| 2026-09-28 | 1.2M | 2.1M | 59.3% | 1,727 |
| 2026-09-25 | 1.4M | 2.2M | 64.9% | 62,599 |
| 2026-09-24 | 837K | 1.3M | 63.8% | 7,923 |
| 2026-09-23 | 953K | 1.5M | 64.1% | 33,981 |
| 2026-09-22 | 1.5M | 2.7M | 56.8% | 64,041 |
| 2026-09-21 | 1.6M | 3.0M | 54.5% | 5,961 |
| 2026-09-18 | 1.4M | 2.4M | 59.2% | 72,992 |
| 2026-09-17 | 1.6M | 2.5M | 61.8% | 10,476 |
| 2026-09-16 | 1.5M | 2.3M | 66.8% | 56,290 |
| 2026-09-15 | 786K | 1.7M | 45.6% | 13,026 |
| 2026-09-14 | 1.5M | 2.6M | 55.7% | 29,532 |
| 2026-09-11 | 706K | 1.4M | 50.8% | 21,419 |
| 2026-09-10 | 857K | 1.5M | 55.4% | 12,430 |
| 2026-09-09 | 1.2M | 2.1M | 54.1% | 44,005 |
| 2026-09-08 | 2.0M | 3.5M | 55.6% | 46,201 |
| 2026-09-04 | 3.6M | 6.6M | 54.0% | 230,344 |
| 2026-09-03 | 1.3M | 2.5M | 51.9% | 130,545 |
| 2026-09-02 | 1.7M | 3.3M | 52.6% | 114,945 |
| 2026-09-01 | 1.6M | 3.2M | 51.7% | 2,658 |
| 2026-08-31 | 1.3M | 2.2M | 58.0% | 39,595 |
| 2026-08-28 | 1.5M | 2.7M | 55.7% | 17,710 |
| 2026-08-27 | 1.5M | 2.8M | 52.1% | 11,665 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 14 September 2026, the fails-to-deliver balance in CBRS is 897 shares, up 856 shares over the last settlement date. Over the last 30 readings it ranged from 4 shares (29 July 2026) to 461,554 shares (17 August 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-14 | 897 | $191.93 | $172K |
| 2026-09-09 | 41 | $199.77 | $8K |
| 2026-09-08 | 106,136 | $210.05 | $22.3M |
| 2026-09-04 | 38,281 | $190.44 | $7.3M |
| 2026-09-03 | 179,495 | $184.52 | $33.1M |
| 2026-08-31 | 490 | $179.08 | $88K |
| 2026-08-26 | 600 | $183.92 | $110K |
| 2026-08-25 | 5,671 | $185.43 | $1.1M |
| 2026-08-24 | 44,654 | $196.13 | $8.8M |
| 2026-08-21 | 107,094 | $209.85 | $22.5M |
| 2026-08-19 | 329,536 | $220.01 | $72.5M |
| 2026-08-18 | 130,038 | $251.98 | $32.8M |
| 2026-08-17 | 461,554 | $218.98 | $101.1M |
| 2026-08-14 | 12,044 | $231.01 | $2.8M |
| 2026-08-12 | 12,580 | $234.76 | $3.0M |
| 2026-08-11 | 666 | $230.01 | $153K |
| 2026-08-10 | 42,676 | $226.73 | $9.7M |
| 2026-08-06 | 710 | $214.30 | $152K |
| 2026-08-04 | 37 | $219.97 | $8K |
| 2026-07-31 | 84 | $203.07 | $17K |
| 2026-07-30 | 4,263 | $169.39 | $722K |
| 2026-07-29 | 4 | $192.72 | $771 |
| 2026-07-27 | 69,042 | $199.12 | $13.7M |
| 2026-07-24 | 40,674 | $220.00 | $8.9M |
| 2026-07-23 | 39,005 | $209.80 | $8.2M |
| 2026-07-22 | 1,200 | $208.57 | $250K |
| 2026-07-20 | 20,281 | $172.86 | $3.5M |
| 2026-07-17 | 32,300 | $180.46 | $5.8M |
| 2026-07-16 | 113 | $184.01 | $21K |
| 2026-07-14 | 3,066 | $204.62 | $627K |
Insider trades
SEC Form 4, newest first, 50 of 100 shown. JSONInsiders at CBRS reported 203 open-market sells worth $387.7M in the last 90 days and no open-market buys. Latest filing: Vishria Eric (Director) on 2026-10-05.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-10-05 | Vishria Eric | Director | J | 59K | $0.00 | $0 | 335K |
| 2026-10-05 | Feldman Andrew D. | CEO, President | J | 159 | $0.00 | $0 | 1K |
| 2026-09-30 | Susan Lior | Director | J | 63K | price not stated in the filing | not stated | 373K |
| 2026-09-30 | Susan Lior | Director | J | 68K | price not stated in the filing | not stated | 420K |
| 2026-09-30 | Susan Lior | Director | J | 1.2M | price not stated in the filing | not stated | 5.3M |
| 2026-09-29 | Komin Robert Patrick Jr. | Chief Financial Officer | Sell | 800 | $203.48 | $163K | 18K |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Sell | 69K | $194.91 | $13.4M | 0 |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Sell | 19K | $195.56 | $3.7M | 69K |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Sell | 7K | $197.05 | $1.3M | 88K |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Sell | 5K | $197.85 | $1.0M | 94K |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Sell | 17K | $198.96 | $3.4M | 99K |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Sell | 18K | $199.89 | $3.6M | 116K |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Sell | 23K | $200.96 | $4.6M | 134K |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Sell | 6K | $201.91 | $1.1M | 157K |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Sell | 10K | $203.37 | $2.0M | 163K |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Sell | 27K | $204.17 | $5.6M | 172K |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Sell | 9K | $205.17 | $1.8M | 200K |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Sell | 9K | $206.13 | $1.9M | 209K |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Sell | 10K | $207.06 | $2.0M | 218K |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Sell | 21K | $208.38 | $4.3M | 227K |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Sell | 41K | $209.33 | $8.6M | 248K |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Sell | 46K | $210.27 | $9.8M | 289K |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Sell | 41K | $211.29 | $8.7M | 336K |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Sell | 18K | $212.20 | $3.9M | 377K |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Sell | 598 | $212.93 | $127K | 395K |
| 2026-09-29 | Mallick Dhiraj | Chief Operating Officer | Conversion | 276K | $0.00 | $0 | 396K |
| 2026-09-29 | Komin Robert Patrick Jr. | Chief Financial Officer | Sell | 3K | $194.92 | $585K | 0 |
| 2026-09-29 | Komin Robert Patrick Jr. | Chief Financial Officer | Sell | 1K | $195.61 | $218K | 3K |
| 2026-09-29 | Komin Robert Patrick Jr. | Chief Financial Officer | Sell | 685 | $197.48 | $135K | 4K |
| 2026-09-29 | Komin Robert Patrick Jr. | Chief Financial Officer | Sell | 870 | $198.70 | $173K | 5K |
| 2026-09-29 | Komin Robert Patrick Jr. | Chief Financial Officer | Sell | 1K | $199.80 | $226K | 6K |
| 2026-09-29 | Komin Robert Patrick Jr. | Chief Financial Officer | Sell | 11K | $201.22 | $2.3M | 7K |
| 2026-09-29 | Komin Robert Patrick Jr. | Chief Financial Officer | Sell | 400 | $201.96 | $81K | 18K |
| 2026-09-29 | Komin Robert Patrick Jr. | Chief Financial Officer | Sell | 2K | $204.26 | $327K | 19K |
| 2026-09-29 | Komin Robert Patrick Jr. | Chief Financial Officer | Sell | 600 | $205.47 | $123K | 21K |
| 2026-09-29 | Komin Robert Patrick Jr. | Chief Financial Officer | Sell | 800 | $206.68 | $165K | 21K |
| 2026-09-29 | Komin Robert Patrick Jr. | Chief Financial Officer | Sell | 700 | $207.83 | $145K | 22K |
| 2026-09-29 | Komin Robert Patrick Jr. | Chief Financial Officer | Sell | 2K | $208.98 | $459K | 23K |
| 2026-09-29 | Komin Robert Patrick Jr. | Chief Financial Officer | Sell | 3K | $210.02 | $588K | 25K |
| 2026-09-29 | Komin Robert Patrick Jr. | Chief Financial Officer | Sell | 3K | $211.03 | $585K | 28K |
| 2026-09-29 | Komin Robert Patrick Jr. | Chief Financial Officer | Sell | 2K | $211.79 | $388K | 31K |
| 2026-09-28 | Patel Yagnesh | Chief Accounting Officer | Sell | 1K | $204.50 | $270K | 15K |
| 2026-09-25 | Lie Sean | Chief Technology Officer | Sell | 2K | $204.50 | $450K | 310K |
| 2026-09-25 | Lie Sean | Chief Technology Officer | Sell | 6K | $205.30 | $1.2M | 312K |
| 2026-09-25 | Lie Sean | Chief Technology Officer | Sell | 14K | $206.63 | $2.8M | 318K |
| 2026-09-25 | Lie Sean | Chief Technology Officer | Sell | 7K | $207.54 | $1.4M | 331K |
| 2026-09-25 | Lie Sean | Chief Technology Officer | Sell | 21K | $208.41 | $4.4M | 338K |
| 2026-09-25 | Lie Sean | Chief Technology Officer | Sell | 30K | $209.53 | $6.3M | 359K |
| 2026-09-25 | Lie Sean | Chief Technology Officer | Sell | 31K | $210.45 | $6.4M | 389K |
| 2026-09-25 | Lie Sean | Chief Technology Officer | Sell | 9K | $211.32 | $1.9M | 420K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON12 Form 144 notices on file for CBRS worth $370.4M at the prices reported; 12 in the last 90 days worth $370.4M. Latest: ROBERT KOMIN filed on 2026-09-29 to sell 32,500 shares ($6.4M) from 2026-09-29.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-09-29 | ROBERT KOMINOfficer | 33K | $6.4M | 0.029% | 2026-09-29 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-29 | DHIRAJ MALLICKOfficer | 396K | $77.9M | 0.353% | 2026-09-29 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-25 | SEAN LIEOfficer | 120K | $24.8M | 0.107% | 2026-09-25 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-04 | ANDREW FELDMANDirector, Officer | 37K | $7.1M | 0.033% | 2026-09-04 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-04 | SEAN LIEOfficer | 53K | $10.2M | 0.048% | 2026-09-04 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-21 | SEAN LIEOfficer, 10% Stockholder | 16K | $3.4M | 0.015% | 2026-08-21 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-21 | ANDREW FELDMANDirector, Officer | 238K | $49.9M | 0.212% | 2026-08-21 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-20 | SEAN LIEOfficer | 710K | $153.2M | 0.633% | 2026-08-20 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-18 | Andrew D. FeldmanOfficer, Director | 27K | $6.7M | 0.024% | 2026-08-18 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-18 | Sean LieOfficer | 21K | $5.4M | 0.019% | 2026-08-18 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-18 | Dhiraj MallickOfficer | 39K | $9.8M | 0.035% | 2026-08-18 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-17 | Vishria Eric10% Stockholder | 68K | $15.7M | 0.061% | 2026-08-17 | Raymond James & Associates |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON23 holders report 5% or more of CBRS in their latest filing, all on Schedule 13G (passive). The largest reported stake is Abigail P. Johnson at 25.7% of the class (28,878,217 shares), filed 2026-07-08 for an event on 2026-06-30.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-08-18 | 13D/Ano. 2 | Lior Susanindividual | 9.6M | 4.3% | 2026-08-14 |
| 2026-08-18 | 13D/Ano. 2 | Eclipse SPV II, L.P.partnership | 4.5M | 2.0% | 2026-08-14 |
| 2026-08-18 | 13D/Ano. 2 | Eclipse SPV II GP, LLCother entity | 4.5M | 2.0% | 2026-08-14 |
| 2026-08-18 | 13D/Ano. 2 | Eclipse Ventures GP I, LLCother entity | 3.8M | 1.7% | 2026-08-14 |
| 2026-08-18 | 13D/Ano. 2 | Eclipse Ventures Fund I, L.P.partnership | 3.8M | 1.7% | 2026-08-14 |
| 2026-08-18 | 13D/Ano. 2 | Eclipse Continuity GP I, LLCother entity | 547K | 0.2% | 2026-08-14 |
| 2026-08-18 | 13D/Ano. 2 | Eclipse Continuity Fund I, L.P.partnership | 547K | 0.2% | 2026-08-14 |
| 2026-08-18 | 13D/Ano. 2 | Eclipse SPV XIII GP, LLCother entity | 410K | 0.2% | 2026-08-14 |
| 2026-08-18 | 13D/Ano. 2 | Eclipse SPV XIII, L.P.partnership | 410K | 0.2% | 2026-08-14 |
| 2026-08-14 | 13G | Foundation Capital Management Co. VIII, L.L.C.other entity | 14.2M | 12.2% | 2026-06-30 |
| 2026-08-14 | 13G | Foundation Capital VIII, L.P.partnership | 13.9M | 12.0% | 2026-06-30 |
| 2026-08-14 | 13G | Foundation Capital Management Co. LF II, L.L.C.other entity | 1.1M | 1.0% | 2026-06-30 |
| 2026-08-14 | 13G | Foundation Capital Leadership Fund II, L.P.partnership | 1.1M | 1.0% | 2026-06-30 |
| 2026-08-14 | 13G | Foundation Capital VIII Principals Fund, L.L.C.other entity | 300K | 0.3% | 2026-06-30 |
| 2026-08-14 | 13G | Altimeter Capital Management, LPinvestment adviser, partnership | 7.2M | 6.2% | 2026-06-30 |
| 2026-08-14 | 13G | Altimeter Capital Management General Partner, LLCother entity | 7.2M | 6.2% | 2026-06-30 |
| 2026-08-14 | 13G | Gerstner Bradley Thomasindividual, parent holding company | 7.2M | 6.2% | 2026-06-30 |
| 2026-08-14 | 13G | Andrew Feldmanindividual | 10.4M | 9.2% | 2026-06-30 |
| 2026-08-14 | 13G | Benchmark Capital Management Co. VIII, L.L.C.other entity | 12.2M | 9.8% | 2026-06-30 |
| 2026-08-14 | 13G | Benchmark Capital Partners VIII, L.P.partnership | 9.3M | 7.7% | 2026-06-30 |
| 2026-08-14 | 13G | Benchmark AI Infrastructure Management Co., L.L.C.other entity | 2.5M | 2.2% | 2026-06-30 |
| 2026-08-14 | 13G | Benchmark Founders' Fund VIII-B, L.P.partnership | 1.4M | 1.3% | 2026-06-30 |
| 2026-08-14 | 13G | Benchmark AI Infrastructure Fund, L.P.partnership | 1.4M | 1.3% | 2026-06-30 |
| 2026-08-14 | 13G | Benchmark Founders' Fund VIII, L.P.partnership | 1.5M | 1.3% | 2026-06-30 |
| 2026-08-14 | 13G | Benchmark AI Infrastructure Fund B, L.P.partnership | 1.1M | 1.0% | 2026-06-30 |
| 2026-08-14 | 13G | Benchmark Capital Management Co. IX, L.L.C.other entity | 690K | 0.6% | 2026-06-30 |
| 2026-08-14 | 13G | Benchmark Capital Partners IX, L.P.partnership | 488K | 0.4% | 2026-06-30 |
| 2026-08-14 | 13G | Benchmark Founders' Fund IX, L.P.partnership | 147K | 0.1% | 2026-06-30 |
| 2026-08-14 | 13G | Benchmark Founders' Fund IX-B, L.P.partnership | 45K | 0.0% | 2026-06-30 |
| 2026-08-14 | 13G | Benchmark Founders' Fund IX-A, L.P.partnership | 10K | 0.0% | 2026-06-30 |
| 2026-08-14 | 13G | Philippe Laffontparent holding company, individual | 7.0M | 7.1% | 2026-06-30 |
| 2026-08-14 | 13G | COATUE MANAGEMENT LLCinvestment adviser, other entity | 7.0M | 7.1% | 2026-06-30 |
| 2026-08-14 | 13G | Coatue Private Fund II LPpartnership | 6.1M | 6.2% | 2026-06-30 |
| 2026-08-14 | 13G | Coatue Private II GP LLCother entity | 6.1M | 6.2% | 2026-06-30 |
| 2026-08-14 | 13G | Atreides Management, LLCparent holding company | 10.5M | 10.7% | n/a |
| 2026-08-14 | 13G | Atreides Management, LPinvestment adviser, partnership | 10.5M | 10.7% | n/a |
| 2026-08-14 | 13G | Gavin Bakerparent holding company, individual | 10.5M | 10.7% | n/a |
| 2026-08-13 | 13G | Jane Street Capital, LLCbroker-dealer | 5.2M | 5.1% | 2026-06-30 |
| 2026-08-13 | 13G | JANE STREET GROUP, LLCparent holding company | 5.2M | 5.1% | 2026-06-30 |
| 2026-07-22 | 13G/Ano. 1 | JPMORGAN CHASE & CO.parent holding company | 3.1M | 3.3% | 2026-06-30 |
| 2026-07-08 | 13G/Ano. 1 | Abigail P. Johnsonindividual | 28.9M | 25.7% | 2026-06-30 |
| 2026-07-08 | 13G/Ano. 1 | FMR LLCparent holding company | 28.9M | 25.7% | 2026-06-30 |
| 2026-05-22 | 13G | Charles P. Coleman IIIparent holding company, individual | 3.5M | 10.0% | 2026-05-15 |
| 2026-05-22 | 13G | Tiger Global Management, LLCinvestment adviser, other entity | 3.5M | 10.0% | 2026-05-15 |
| 2026-05-22 | 13G | Tiger Global Performance, LLCother entity | 3.0M | 8.7% | 2026-05-15 |
| 2026-05-22 | 13G | Tiger Global Investments, L.P.partnership | 3.0M | 8.7% | 2026-05-15 |
13F holders
Tracked managers holding CBRS at their latest 13F. JSON8 of the 30 tracked managers held CBRS at their latest 13F, $2.83B in total at quarter-end prices. Coatue Management is the largest at $1.55B (3.2% of its portfolio) as of 2026-06-30. Over the prior quarter 8 added shares and 0 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Coatue Management | 2026-06-30 | 7.0M | $1.55B | 3.19% | new |
| Tiger Global Management | 2026-06-30 | 3.0M | $662.8M | 2.76% | new |
| Citadel Advisors | 2026-06-30 | 1.2M | $275.8M | 0.03% | new |
| ARK Investment Management | 2026-06-30 | 765K | $169.0M | 1.10% | new |
| Millennium Management | 2026-06-30 | 273K | $60.3M | 0.02% | new |
| D. E. Shaw & Co. | 2026-06-30 | 220K | $48.7M | 0.02% | new |
| Soros Fund Management | 2026-06-30 | 150K | $33.1M | 0.41% | new |
| Point72 Asset Management | 2026-06-30 | 130K | $28.7M | 0.03% | new |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
What this page is
Cerebras Systems in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows Cerebras Systems (CBRS), SEC CIK 2021728, listed on Nasdaq. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-09-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-08.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-14.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-09-29.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-08-18.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-12.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-10-05.JSON and CSV
- Company record
- EDGAR filing index for CIK 2021728Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
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Datasets
Frequently Asked Questions
How much of CBRS is sold short?
12,802,090 shares were held short at the 2026-09-15 settlement, 2.2 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is CBRS's daily short volume?
On 2026-10-08, 2,550,612 of the 4,484,623 CBRS shares reported to FINRA were sold short, 56.9% of the day's reported volume. Short volume is a flow for one day, not a position.
Does CBRS have fails to deliver?
The SEC's latest file shows 897 CBRS shares failed to deliver at settlement 2026-09-14. Fails are reported per settlement date and published twice a month with a lag.
Are CBRS insiders buying or selling?
Insiders at CBRS reported 203 open-market sells worth $387.7M in the last 90 days and no open-market buys. Latest filing: Vishria Eric (Director) on 2026-10-05.
Have CBRS insiders filed to sell?
12 Form 144 notices on file for CBRS worth $370.4M at the prices reported; 12 in the last 90 days worth $370.4M. Latest: ROBERT KOMIN filed on 2026-09-29 to sell 32,500 shares ($6.4M) from 2026-09-29.
Who owns 5% or more of CBRS?
23 holders report 5% or more of CBRS in their latest filing, all on Schedule 13G (passive). The largest reported stake is Abigail P. Johnson at 25.7% of the class (28,878,217 shares), filed 2026-07-08 for an event on 2026-06-30.
Which tracked 13F managers own CBRS?
8 of the 30 tracked 13F managers held CBRS shares at their latest filing, $2.83B in all. The largest: Philippe Laffont's Coatue Management (7.0M shares, $1.55B), Chase Coleman's Tiger Global Management (3.0M shares, $662.8M), Ken Griffin's Citadel Advisors (1.2M shares, $275.8M), Cathie Wood's ARK Investment Management (765K shares, $169.0M), Izzy Englander's Millennium Management (273K shares, $60.3M), D. E. Shaw & Co. (220K shares, $48.7M). The table above lists all 8.
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.