Caris Life Sciences (CAI)
Caris Life Sciences 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, classified by the SEC as services-medical laboratories.
13.9M
Short interest
settlement 2026-09-30
2.5
Days to cover
-0.5 days vs prior
70.7%
Short share of volume
2026-10-12
321
Fails to deliver
settlement 2026-09-10
Wed 4 Nov
Next earnings
estimated date
-$27.2M
Insider flow, 90 days
0 buys, 5 sells
As of 2026-10-12.
Short interest
FINRA, twice a month. The newest 24 settlements in the table, 48 in the chart. JSONAs of 30 September 2026, short interest in CAI is 13,891,975 shares, up 207,603 shares over the last month. Over the last 48 readings it ranged from 221,952 shares (15 March 2021) to 14,954,631 shares (14 August 2026). The latest reading sits at the top of that range. At the reported average volume of 5.6M shares a day that is 2.5 days to cover.
Embed this chart.The embed keeps its attribution line.
<iframe src="https://xoomar.com/embed/stocks/cai" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-09-30 | 13,891,975 | +4.2% | 5,592,020 | 2.48 |
| 2026-09-15 | 13,331,431 | -2.6% | 4,432,398 | 3.01 |
| 2026-08-31 | 13,684,372 | -8.5% | 5,585,958 | 2.45 |
| 2026-08-14 | 14,954,631 | +1.3% | 5,889,026 | 2.54 |
| 2026-07-31 | 14,757,565 | +25.8% | 3,505,494 | 4.21 |
| 2026-07-15 | 11,734,462 | -17.2% | 3,457,476 | 3.39 |
| 2026-06-30 | 14,175,752 | +21.8% | 3,274,799 | 4.33 |
| 2026-06-15 | 11,636,124 | +8.4% | 2,622,445 | 4.44 |
| 2026-05-29 | 10,729,443 | -8.7% | 2,585,339 | 4.15 |
| 2026-05-15 | 11,753,578 | -7.7% | 3,690,782 | 3.18 |
| 2026-04-30 | 12,733,076 | +8.0% | 1,561,324 | 8.16 |
| 2026-04-15 | 11,791,483 | +14.5% | 1,893,236 | 6.23 |
| 2026-03-31 | 10,294,979 | +36.4% | 3,199,076 | 3.22 |
| 2026-03-13 | 7,546,437 | +15.9% | 2,104,741 | 3.59 |
| 2026-02-27 | 6,509,779 | +7.0% | 2,435,364 | 2.67 |
| 2026-02-13 | 6,082,231 | +3.2% | 2,162,265 | 2.81 |
| 2026-01-30 | 5,895,197 | -10.8% | 2,419,446 | 2.44 |
| 2026-01-15 | 6,606,578 | +6.5% | 2,783,787 | 2.37 |
| 2025-12-31 | 6,203,433 | +14.2% | 1,759,016 | 3.53 |
| 2025-12-15 | 5,434,034 | -20.6% | 3,234,752 | 1.68 |
| 2025-11-28 | 6,840,155 | +32.9% | 1,585,680 | 4.31 |
| 2025-11-14 | 5,146,467 | +22.8% | 1,791,102 | 2.87 |
| 2025-10-31 | 4,190,099 | +12.3% | 672,177 | 6.23 |
| 2025-10-15 | 3,731,730 | +7.0% | 674,206 | 5.53 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 12 October 2026, the short share of CAI volume is 70.7%, up 15.2 points over the last five sessions. Over the last 30 readings it ranged from 33.7% (22 September 2026) to 70.7% (12 October 2026). The latest reading sits at the top of that range. The latest reading is 22.5 points above the 30-session average of 48.1%, on 1.6M shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-12 | 1.1M | 1.6M | 70.7% | 300 |
| 2026-10-09 | 1.1M | 1.8M | 61.2% | 3,486 |
| 2026-10-08 | 647K | 1.2M | 51.9% | 431 |
| 2026-10-07 | 791K | 1.7M | 45.5% | 10,510 |
| 2026-10-06 | 1.2M | 2.0M | 61.0% | 11,074 |
| 2026-10-05 | 778K | 1.4M | 55.5% | 2,640 |
| 2026-10-02 | 615K | 1.2M | 53.3% | 0 |
| 2026-10-01 | 810K | 1.7M | 47.0% | 0 |
| 2026-09-30 | 521K | 1.1M | 46.6% | 118 |
| 2026-09-29 | 610K | 1.6M | 37.7% | 26,677 |
| 2026-09-28 | 673K | 1.4M | 49.0% | 24,549 |
| 2026-09-25 | 406K | 1.2M | 34.6% | 17,120 |
| 2026-09-24 | 1.4M | 2.3M | 59.5% | 193,336 |
| 2026-09-23 | 692K | 1.8M | 38.6% | 1,374 |
| 2026-09-22 | 855K | 2.5M | 33.7% | 133,069 |
| 2026-09-21 | 1.4M | 2.5M | 57.2% | 18,382 |
| 2026-09-18 | 765K | 1.8M | 41.4% | 6,711 |
| 2026-09-17 | 1.8M | 3.7M | 49.4% | 17,127 |
| 2026-09-16 | 751K | 1.5M | 51.1% | 750 |
| 2026-09-15 | 1.6M | 4.0M | 39.5% | 41,259 |
| 2026-09-14 | 726K | 1.4M | 52.5% | 13,235 |
| 2026-09-11 | 347K | 627K | 55.4% | 0 |
| 2026-09-10 | 575K | 1.3M | 44.0% | 9,750 |
| 2026-09-09 | 511K | 1.1M | 46.7% | 307 |
| 2026-09-08 | 818K | 1.8M | 45.3% | 110 |
| 2026-09-04 | 1.0M | 2.2M | 47.7% | 10,286 |
| 2026-09-03 | 1.4M | 3.1M | 45.1% | 202,973 |
| 2026-09-02 | 751K | 2.1M | 35.8% | 250,124 |
| 2026-09-01 | 583K | 1.6M | 36.8% | 824 |
| 2026-08-31 | 878K | 1.8M | 49.9% | 3,690 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 10 September 2026, the fails-to-deliver balance in CAI is 321 shares, down 5,194 shares over the last settlement date. Over the last 30 readings it ranged from 15 shares (13 May 2026) to 292,488 shares (17 August 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-10 | 321 | $24.03 | $8K |
| 2026-09-08 | 5,515 | $25.07 | $138K |
| 2026-09-04 | 268,723 | $25.32 | $6.8M |
| 2026-09-03 | 164,816 | $24.80 | $4.1M |
| 2026-08-25 | 49,582 | $26.13 | $1.3M |
| 2026-08-24 | 89,661 | $26.27 | $2.4M |
| 2026-08-21 | 170,487 | $24.58 | $4.2M |
| 2026-08-20 | 251,646 | $22.76 | $5.7M |
| 2026-08-19 | 271,175 | $20.97 | $5.7M |
| 2026-08-18 | 279,710 | $21.63 | $6.1M |
| 2026-08-17 | 292,488 | $21.80 | $6.4M |
| 2026-08-12 | 21,864 | $23.14 | $506K |
| 2026-08-11 | 2,055 | $23.40 | $48K |
| 2026-07-31 | 140,830 | $16.09 | $2.3M |
| 2026-07-30 | 141,421 | $15.59 | $2.2M |
| 2026-07-17 | 126 | $16.48 | $2K |
| 2026-07-16 | 1,512 | $17.46 | $26K |
| 2026-07-02 | 14,383 | $18.75 | $270K |
| 2026-06-25 | 1,690 | $18.15 | $31K |
| 2026-06-22 | 6,346 | $18.47 | $117K |
| 2026-06-15 | 30,469 | $17.97 | $548K |
| 2026-06-10 | 22,227 | $16.96 | $377K |
| 2026-05-27 | 223,073 | $15.52 | $3.5M |
| 2026-05-14 | 2,906 | $14.69 | $43K |
| 2026-05-13 | 15 | $16.76 | $251 |
| 2026-05-12 | 163 | $15.94 | $3K |
| 2026-05-05 | 133,717 | $18.69 | $2.5M |
| 2026-05-04 | 62,534 | $18.47 | $1.2M |
| 2026-05-01 | 89,180 | $19.00 | $1.7M |
| 2026-04-30 | 199,935 | $17.77 | $3.6M |
Insider trades
SEC Form 4, newest first, 50 of 83 shown. JSONInsiders at CAI reported 5 open-market sells worth $27.2M in the last 90 days and no open-market buys. Latest filing: Denton John Russel (See Remarks) on 2026-09-22.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-09-22 | Denton John Russel | See Remarks | Sell | 8K | $31.82 | $239K | 175K |
| 2026-09-17 | Brille Brian J | See Remarks | Sell | 400K | $30.33 | $12.1M | 230K |
| 2026-09-17 | Brille Brian J | See Remarks | Option exercise | 400K | $2.44 | $976K | 630K |
| 2026-09-04 | Spetzler David Baxley | President | Sell | 119K | $24.76 | $3.0M | 1.2M |
| 2026-09-04 | Spetzler David Baxley | President | Option exercise | 250K | $2.44 | $610K | 1.3M |
| 2026-09-03 | Spetzler David Baxley | President | Sell | 85K | $25.32 | $2.1M | 1.1M |
| 2026-09-03 | Spetzler David Baxley | President | Sell | 393K | $24.76 | $9.7M | 1.1M |
| 2026-09-03 | Spetzler David Baxley | President | Option exercise | 1.0M | $2.44 | $2.4M | 1.5M |
| 2026-08-14 | Fredrickson David Paul | Director | Grant | 13K | $0.00 | $0 | 32K |
| 2026-08-14 | Minor Lloyd | Director | Grant | 13K | $0.00 | $0 | 32K |
| 2026-08-14 | Vacirca Jeff L | Director | Grant | 13K | $0.00 | $0 | 63K |
| 2026-08-14 | Gilliam Joseph E | Director | Grant | 13K | $0.00 | $0 | 29K |
| 2026-08-14 | PHILLIPS T DANNY | Director | Grant | 13K | $0.00 | $0 | 133K |
| 2026-08-14 | JOHANSEN LAURA I | Director | Grant | 13K | $0.00 | $0 | 344K |
| 2026-08-14 | HALBERT JON | Director | Grant | 13K | $0.00 | $0 | 132K |
| 2026-08-14 | CASTLEMAN PETER M | Director | Grant | 13K | $0.00 | $0 | 29K |
| 2026-05-29 | Knowles Jonathan Kenneth Charles | Director | Grant | 2K | $15.62 | $25K | 309K |
| 2026-05-29 | POSTE GEORGE | Director | Grant | 2K | $15.62 | $25K | 18K |
| 2026-05-15 | HALBERT JON | Director | Buy | 68K | $14.56 | $990K | 705K |
| 2026-05-15 | Power Luke Thomas | See Remarks | Tax withholding | 10K | $15.25 | $149K | 154K |
| 2026-05-15 | Spetzler David Baxley | President | Tax withholding | 14K | $15.25 | $211K | 530K |
| 2026-05-15 | Denton John Russel | See Remarks | Tax withholding | 6K | $15.25 | $92K | 182K |
| 2026-05-15 | HALBERT DAVID D | See Remarks | Tax withholding | 41K | $15.25 | $621K | 2.6M |
| 2026-05-15 | Brille Brian J | See Remarks | Tax withholding | 14K | $15.25 | $213K | 230K |
| 2026-05-11 | Vacirca Jeff L | Director | Buy | 31K | $16.15 | $501K | 50K |
| 2026-03-06 | Power Luke Thomas | See Remarks | Grant | 64K | $0.00 | $0 | 164K |
| 2026-03-06 | Spetzler David Baxley | President | Grant | 83K | $0.00 | $0 | 544K |
| 2026-03-06 | Denton John Russel | See Remarks | Grant | 64K | $0.00 | $0 | 188K |
| 2026-03-06 | HALBERT DAVID D | See Remarks | Grant | 320K | $0.00 | $0 | 2.6M |
| 2026-03-06 | Brille Brian J | See Remarks | Grant | 83K | $0.00 | $0 | 244K |
| 2026-02-26 | Fredrickson David Paul | Director | Grant | 2K | $20.06 | $50K | 19K |
| 2026-02-26 | Vacirca Jeff L | Director | Grant | 2K | $20.06 | $50K | 19K |
| 2026-02-26 | PHILLIPS T DANNY | Director | Grant | 4K | $20.06 | $75K | 120K |
| 2026-02-26 | HALBERT JON | Director | Grant | 2K | $20.06 | $50K | 119K |
| 2026-02-26 | CASTLEMAN PETER M | Director | Grant | 6K | $20.06 | $111K | 24K |
| 2026-02-26 | Minor Lloyd | Director | Grant | 2K | $20.06 | $50K | 19K |
| 2026-01-09 | CASTLEMAN PETER M | Director | Option exercise | 3K | $18.60 | $47K | 19K |
| 2025-12-11 | Power Luke Thomas | See Remarks | Sell | 1K | $27.16 | $38K | 100K |
| 2025-12-11 | Power Luke Thomas | See Remarks | Sell | 61K | $26.56 | $1.6M | 101K |
| 2025-12-11 | Power Luke Thomas | See Remarks | Option exercise | 38K | $2.44 | $92K | 162K |
| 2025-12-11 | Power Luke Thomas | See Remarks | Option exercise | 25K | $2.44 | $60K | 124K |
| 2025-12-11 | Brille Brian J | See Remarks | Gift | 650 | $0.00 | $0 | 161K |
| 2025-12-10 | Brille Brian J | See Remarks | Gift | 650 | $0.00 | $0 | 162K |
| 2025-11-07 | Spetzler David Baxley | President | Buy | 400 | $23.85 | $10K | 461K |
| 2025-11-07 | Denton John Russel | See Remarks | Buy | 4K | $24.09 | $101K | 9K |
| 2025-09-11 | PHILLIPS T DANNY | Director | Option exercise | 100K | $2.44 | $244K | 116K |
| 2025-08-11 | POSTE GEORGE | Director | Tax withholding | 91K | $29.75 | $2.7M | 220K |
| 2025-08-11 | POSTE GEORGE | Director | Tax withholding | 48K | $29.75 | $1.4M | 312K |
| 2025-08-11 | POSTE GEORGE | Director | Option exercise | 125K | $2.44 | $305K | 360K |
| 2025-08-11 | Spetzler David Baxley | President | Tax withholding | 64K | $29.75 | $1.9M | 460K |
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. JSON8 Form 144 notices on file for CAI worth $32.5M at the prices reported; 7 in the last 90 days worth $30.8M. Latest: JOHN RUSSEL DENTON filed on 2026-09-22 to sell 7,500 shares ($239K) from 2026-09-22.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-09-22 | JOHN RUSSEL DENTONOfficer | 8K | $239K | 0.003% | 2026-09-22 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-17 | BRIAN J BRILLEOfficer, Director | 400K | $12.1M | 0.142% | 2026-09-17 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-04 | DAVID SPETZLEROfficer | 119K | $3.0M | 0.042% | 2026-09-04 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-09-03 | DAVID SPETZLEROfficer | 478K | $11.9M | 0.169% | 2026-09-03 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-24 | GEORGE H POSTE REVOCABLE TRUSTFormer Affiliate | 100K | $2.6M | 0.035% | 2026-08-24 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-07 | GEORGE H POSTEDirector | 30K | $643K | 0.011% | 2026-08-07 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2026-08-03 | GEORGE H POSTEDirector | 20K | $325K | 0.007% | 2026-08-03 | Morgan Stanley Smith Barney LLC Executive Financial Services |
| 2025-12-11 | LUKE POWEROfficer | 62K | $1.7M | 0.022% | 2025-12-11 | Morgan Stanley Smith Barney LLC Executive Financial Services |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON2 holders report 5% or more of CAI in their latest filing, all on Schedule 13G (passive). The largest reported stake is FMR LLC at 10.8% of the class (30,631,585 shares), filed 2026-04-07 for an event on 2026-03-31.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-08-12 | 13G/Ano. 2 | J. H. Whitney Equity Partners VI, LLCother entity, parent holding company | 11.3M | 4.0% | 2026-06-30 |
| 2026-08-12 | 13G/Ano. 2 | VIGANO PAUL Rindividual, parent holding company | 11.3M | 4.0% | 2026-06-30 |
| 2026-08-12 | 13G/Ano. 2 | WILLIAMS ROBERT M JRindividual, parent holding company | 11.3M | 4.0% | 2026-06-30 |
| 2026-08-12 | 13G/Ano. 2 | J H Whitney VI L Ppartnership | 11.3M | 4.0% | 2026-06-30 |
| 2026-08-07 | 13G/Ano. 3 | Alan Waxmanindividual, parent holding company | 7.3M | 2.6% | 2026-06-30 |
| 2026-08-07 | 13G/Ano. 3 | TSSP Sub-Fund HoldCo, LLCother entity | 6.7M | 2.4% | 2026-06-30 |
| 2026-04-07 | 13G/Ano. 1 | FMR LLCparent holding company | 30.6M | 10.8% | 2026-03-31 |
| 2026-04-07 | 13G/Ano. 1 | Abigail P. Johnsonindividual | 30.6M | 10.8% | 2026-03-31 |
13F holders
Tracked managers holding CAI at their latest 13F. JSON8 of the 30 tracked managers held CAI at their latest 13F, $268.8M in total at quarter-end prices. Coatue Management is the largest at $175.0M (0.4% of its portfolio) as of 2026-06-30. Over the prior quarter 6 added shares and 0 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Coatue Management | 2026-06-30 | 9.8M | $175.0M | 0.36% | 0 |
| Millennium Management | 2026-06-30 | 2.2M | $39.3M | 0.01% | +675K |
| Duquesne Family Office | 2026-06-30 | 1.9M | $33.8M | 0.65% | 0 |
| Renaissance Technologies | 2026-06-30 | 568K | $10.1M | 0.01% | +118K |
| Citadel Advisors | 2026-06-30 | 298K | $5.3M | 0.00% | +220K |
| D. E. Shaw & Co. | 2026-06-30 | 205K | $3.6M | 0.00% | +75K |
| AQR Capital Management | 2026-06-30 | 59K | $1.1M | 0.00% | +30K |
| Two Sigma Investments | 2026-06-30 | 36K | $640K | 0.00% | 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
Caris Life Sciences 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 Caris Life Sciences (CAI), SEC CIK 2019410, listed on Nasdaq, classified by the SEC as services-medical laboratories. 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 2026-09-30.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-12.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-10.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 2026-09-22.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 2026-08-12.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 2026-08-05.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 2026-09-22.JSON and CSV
- Company record
- EDGAR filing index for CIK 2019410Ticker, 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.
Other companies the SEC classifies as services-medical laboratories
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Datasets
Frequently Asked Questions
How much of CAI is sold short?
What is CAI's daily short volume?
Does CAI have fails to deliver?
Are CAI insiders buying or selling?
Have CAI insiders filed to sell?
Who owns 5% or more of CAI?
Which tracked 13F managers own CAI?
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.