Connect Biopharma Holdings (CNTB)
Connect Biopharma Holdings 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.
3.9M
Short interest
settlement 2026-10-15
1.7
Days to cover
+0.7 days vs prior
51.7%
Short share of volume
2026-11-02
25
Fails to deliver
settlement 2026-10-13
Wed 11 Nov
Next earnings
estimated date
$0
Insider flow, 90 days
0 buys, 0 sells
As of 2026-11-02.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 15 October 2026, short interest in CNTB is 3,857,756 shares, up 1,083,695 shares over the last month. Over the last 48 readings it ranged from 5,404 shares (31 March 2025) to 3,857,756 shares (15 October 2026). The latest reading sits at the top of that range. At the reported average volume of 2.2M shares a day that is 1.7 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 3,857,756 | +10.2% | 2,225,113 | 1.73 |
| 2026-09-30 | 3,499,648 | +26.2% | 15,989,406 | 1.00 |
| 2026-09-15 | 2,774,061 | +39.6% | 2,819,107 | 1.00 |
| 2026-08-31 | 1,987,166 | +9.3% | 476,899 | 4.17 |
| 2026-08-14 | 1,818,101 | -11.7% | 407,429 | 4.46 |
| 2026-07-31 | 2,060,037 | -0.1% | 256,793 | 8.02 |
| 2026-07-15 | 2,062,435 | +55.4% | 740,964 | 2.78 |
| 2026-06-30 | 1,327,642 | +25.1% | 627,641 | 2.12 |
| 2026-06-15 | 1,061,303 | -9.1% | 261,954 | 4.05 |
| 2026-05-29 | 1,166,987 | +0.8% | 198,763 | 5.87 |
| 2026-05-15 | 1,157,694 | +2.1% | 140,347 | 8.25 |
| 2026-04-30 | 1,134,300 | +14.0% | 235,411 | 4.82 |
| 2026-04-15 | 994,618 | +65.4% | 486,342 | 2.05 |
| 2026-03-31 | 601,458 | +58.8% | 369,448 | 1.63 |
| 2026-03-13 | 378,698 | +24.4% | 147,332 | 2.57 |
| 2026-02-27 | 304,407 | +1.9% | 78,750 | 3.87 |
| 2026-02-13 | 298,818 | +4.7% | 89,098 | 3.35 |
| 2026-01-30 | 285,402 | +4.9% | 96,787 | 2.95 |
| 2026-01-15 | 272,167 | +11.1% | 54,976 | 4.95 |
| 2025-12-31 | 245,091 | +18.4% | 144,338 | 1.70 |
| 2025-12-15 | 206,940 | +121.0% | 160,653 | 1.29 |
| 2025-11-28 | 93,644 | +27.7% | 1,153,309 | 1.00 |
| 2025-11-14 | 73,308 | +7.9% | 200,979 | 1.00 |
| 2025-10-31 | 67,937 | +5.7% | 46,975 | 1.45 |
| 2025-10-15 | 64,298 | +452.7% | 108,734 | 1.00 |
| 2025-09-30 | 11,634 | -14.8% | 79,451 | 1.00 |
| 2025-09-15 | 13,656 | -53.8% | 183,529 | 1.00 |
| 2025-08-29 | 29,537 | -71.2% | 128,216 | 1.00 |
| 2025-08-15 | 102,420 | +204.6% | 139,383 | 1.00 |
| 2025-07-31 | 33,623 | -43.9% | 308,544 | 1.00 |
| 2025-07-15 | 59,941 | +110.9% | 196,553 | 1.00 |
| 2025-06-30 | 28,427 | +66.6% | 104,850 | 1.00 |
| 2025-06-13 | 17,062 | -72.2% | 83,001 | 1.00 |
| 2025-05-30 | 61,369 | -19.2% | 70,880 | 1.00 |
| 2025-05-15 | 75,924 | +56.5% | 77,258 | 1.00 |
| 2025-04-30 | 48,519 | -25.3% | 99,230 | 1.00 |
| 2025-04-15 | 64,978 | +1102.4% | 407,843 | 1.00 |
| 2025-03-31 | 5,404 | -47.3% | 33,828 | 1.00 |
| 2025-03-14 | 10,250 | -78.0% | 18,912 | 1.00 |
| 2025-02-28 | 46,660 | +56.6% | 23,429 | 1.99 |
| 2025-02-14 | 29,790 | -4.9% | 19,336 | 1.54 |
| 2025-01-31 | 31,337 | -23.3% | 12,650 | 2.48 |
| 2025-01-15 | 40,847 | -44.6% | 16,643 | 2.45 |
| 2024-12-31 | 73,791 | -16.0% | 38,408 | 1.92 |
| 2024-12-13 | 87,829 | +53.6% | 37,545 | 2.34 |
| 2024-11-29 | 57,184 | -7.5% | 23,075 | 2.48 |
| 2024-11-15 | 61,794 | +110.2% | 39,552 | 1.56 |
| 2024-10-31 | 29,400 | -35.3% | 12,515 | 2.35 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 2 November 2026, the short share of CNTB volume is 51.7%, down 23.1 points over the last five sessions. Over the last 30 readings it ranged from 13.1% (30 October 2026) to 76.3% (29 October 2026). The latest reading is in line with the 30-session average of 51.8%, on 300K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-02 | 155K | 300K | 51.7% | 1 |
| 2026-10-30 | 149K | 1.1M | 13.1% | 700 |
| 2026-10-29 | 105K | 138K | 76.3% | 0 |
| 2026-10-28 | 56K | 154K | 36.1% | 0 |
| 2026-10-27 | 97K | 197K | 49.2% | 0 |
| 2026-10-26 | 502K | 671K | 74.9% | 336 |
| 2026-10-23 | 124K | 209K | 59.5% | 3,424 |
| 2026-10-22 | 419K | 723K | 58.0% | 92,670 |
| 2026-10-21 | 587K | 994K | 59.1% | 78,896 |
| 2026-10-20 | 110K | 223K | 49.2% | 2,985 |
| 2026-10-19 | 324K | 582K | 55.7% | 0 |
| 2026-10-16 | 113K | 227K | 49.6% | 0 |
| 2026-10-15 | 615K | 921K | 66.8% | 0 |
| 2026-10-14 | 410K | 673K | 60.9% | 4,358 |
| 2026-10-13 | 477K | 1.1M | 42.0% | 13,062 |
| 2026-10-12 | 568K | 788K | 72.1% | 0 |
| 2026-10-09 | 304K | 566K | 53.6% | 0 |
| 2026-10-08 | 341K | 644K | 53.0% | 0 |
| 2026-10-07 | 145K | 493K | 29.4% | 0 |
| 2026-10-06 | 313K | 1.1M | 28.6% | 0 |
| 2026-10-05 | 209K | 719K | 29.0% | 365 |
| 2026-10-02 | 1.3M | 2.4M | 53.2% | 152,075 |
| 2026-10-01 | 2.7M | 4.7M | 56.7% | 75,461 |
| 2026-09-30 | 24.9M | 42.9M | 58.1% | 201,558 |
| 2026-09-29 | 414K | 839K | 49.4% | 0 |
| 2026-09-28 | 282K | 540K | 52.1% | 0 |
| 2026-09-25 | 254K | 488K | 52.1% | 0 |
| 2026-09-24 | 353K | 486K | 72.8% | 34,941 |
| 2026-09-23 | 363K | 653K | 55.6% | 5,949 |
| 2026-09-22 | 209K | 566K | 36.9% | 100 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 13 October 2026, the fails-to-deliver balance in CNTB is 25 shares, down 20,373 shares over the last settlement date. Over the last 30 readings it ranged from 25 shares (13 October 2026) to 510,315 shares (1 October 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-10-13 | 25 | $0.91 | $23 |
| 2026-10-09 | 20,398 | $0.88 | $18K |
| 2026-10-08 | 12,374 | $0.94 | $12K |
| 2026-10-07 | 12,340 | $0.91 | $11K |
| 2026-10-05 | 1,467 | $0.93 | $1K |
| 2026-10-01 | 510,315 | $1.10 | $561K |
| 2026-09-24 | 2,450 | $1.07 | $3K |
| 2026-09-16 | 56,445 | $1.17 | $66K |
| 2026-09-15 | 2,175 | $1.73 | $4K |
| 2026-09-11 | 311 | $2.06 | $641 |
| 2026-09-04 | 2,491 | $1.93 | $5K |
| 2026-08-31 | 28 | $2.23 | $62 |
| 2026-08-27 | 52 | $2.33 | $121 |
| 2026-08-19 | 29 | $2.43 | $70 |
| 2026-08-11 | 660 | $2.15 | $1K |
| 2026-08-10 | 1,447 | $2.21 | $3K |
| 2026-08-06 | 73 | $2.18 | $159 |
| 2026-08-04 | 2,604 | $1.97 | $5K |
| 2026-07-15 | 105 | $2.36 | $248 |
| 2026-07-14 | 2,011 | $2.26 | $5K |
| 2026-07-13 | 614 | $2.51 | $2K |
| 2026-07-10 | 4,500 | $2.66 | $12K |
| 2026-07-09 | 13,500 | $2.22 | $30K |
| 2026-07-08 | 3,687 | $2.21 | $8K |
| 2026-07-01 | 184 | $2.38 | $438 |
| 2026-06-29 | 3,480 | $2.19 | $8K |
| 2026-06-25 | 1,775 | $2.12 | $4K |
| 2026-06-24 | 6,257 | $2.09 | $13K |
| 2026-06-23 | 157,006 | $1.99 | $312K |
| 2026-06-22 | 6,649 | $2.00 | $13K |
Insider trades
SEC Form 4, newest first. JSONNo open-market insider trades were reported for CNTB in the last 90 days. The most recent filings are listed below. Latest filing: LIU JEAN I (Director) on 2026-09-30.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-09-30 | LIU JEAN I | Director | Grant | 9K | $0.00 | $0 | 21K |
| 2026-09-30 | Xanthopoulos Kleanthis Gabriel | Director | Grant | 5K | $0.00 | $0 | 92K |
| 2026-06-30 | Xanthopoulos Kleanthis Gabriel | Director | Grant | 4K | $0.00 | $0 | 87K |
| 2026-06-30 | LIU JEAN I | Director | Grant | 7K | $0.00 | $0 | 12K |
| 2026-05-29 | Huang James | Director | Buy | 150K | $2.48 | $372K | 13.3M |
| 2026-03-31 | Huang James | Director | Buy | 1.2M | $3.45 | $4.0M | 13.2M |
| 2026-03-31 | Xanthopoulos Kleanthis Gabriel | Director | Grant | 3K | $0.00 | $0 | 83K |
| 2026-03-31 | LIU JEAN I | Director | Grant | 5K | $0.00 | $0 | 5K |
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. JSON4 Form 144 notices on file for CNTB worth $9.6M at the prices reported; 0 in the last 90 days worth $0. Latest: Panacea Innovation Limited filed on 2025-11-24 to sell 2,000,000 shares ($6.0M) from 2025-11-24.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2025-11-24 | Panacea Innovation Limited10% Owner | 2.0M | $6.0M | 3.578% | 2025-11-24 | Jefferies Financial Group Inc. |
| 2025-11-21 | Wei Zheng10% Stockholder | 650K | $2.1M | 1.163% | 2025-11-21 | Charles Schwab & Co |
| 2025-11-18 | BioFortune Inc10% Stockholder | 500K | $1.2M | 0.900% | 2025-11-18 | Tiger Brokers (Singappre) Pte. Ltd. |
| 2025-10-01 | Wei Zheng10% Stockholder | 200K | $306K | 0.359% | 2025-10-01 | Charles Schwab & Co |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON11 holders report 5% or more of CNTB in their latest filing, 4 on Schedule 13D (active intent). The largest reported stake is James Huang at 21.2% of the class (13,160,000 shares), filed 2026-04-01 for an event on 2026-03-31.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-10-06 | 13G | Braden M Leonardindividual | 4.3M | 6.8% | 2026-09-30 |
| 2026-10-06 | 13G | BML Investment Partners, L.P.partnership | 3.9M | 6.1% | 2026-09-30 |
| 2026-08-14 | 13G/Ano. 6 | Wei Zhengindividual | 2.5M | 4.0% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 1 | Ikarian Capital, LLCinvestment adviser | 4.3M | 6.9% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 1 | Neil Shahrestaniindividual, parent holding company | 4.3M | 6.9% | 2026-06-30 |
| 2026-04-14 | 13G | Wubin Panindividual | 6.0M | 9.6% | 2026-04-14 |
| 2026-04-14 | 13G | BioFortune Inccorporation | 6.0M | 9.5% | 2026-04-14 |
| 2026-04-01 | 13D/Ano. 5 | James Huangindividual | 13.2M | 21.2% | 2026-03-31 |
| 2026-04-01 | 13D/Ano. 5 | Panacea Innovation Limitedcorporation | 13.2M | 21.2% | 2026-03-31 |
| 2026-04-01 | 13D/Ano. 5 | Panacea Venture Healthcare Fund II, L.P.partnership | 13.2M | 21.2% | 2026-03-31 |
| 2026-04-01 | 13D/Ano. 5 | Panacea Venture Healthcare Fund II GP Company, Ltd.corporation | 13.2M | 21.2% | 2026-03-31 |
| 2026-02-17 | 13G/Ano. 4 | Zheng Weiindividual | 5.0M | 9.0% | 2025-12-31 |
13F holders
Tracked managers holding CNTB at their latest 13F. JSON3 of the 30 tracked managers held CNTB at their latest 13F, $786K in total at quarter-end prices. Two Sigma Investments is the largest at $475K (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 1 added shares and 2 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Two Sigma Investments | 2026-06-30 | 199K | $475K | 0.00% | +152K |
| Renaissance Technologies | 2026-06-30 | 87K | $208K | 0.00% | -33K |
| Millennium Management | 2026-06-30 | 44K | $104K | 0.00% | -431K |
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
Connect Biopharma Holdings 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 Connect Biopharma Holdings (CNTB), SEC CIK 1835268, 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 2026-10-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-11-02.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-10-13.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 2025-11-24.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 2026-10-06.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 2026-05-12.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 2026-09-30.JSON and CSV
- Company record
- EDGAR filing index for CIK 1835268Ticker, 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 CNTB is sold short?
What is CNTB's daily short volume?
Does CNTB have fails to deliver?
Are CNTB insiders buying or selling?
Have CNTB insiders filed to sell?
Who owns 5% or more of CNTB?
Which tracked 13F managers own CNTB?
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.