ZAI LAB LTD SHS NEW US$0.00000 | ZAILF | OTC | Latest report: February 27, 2026
ZAI LAB LTD SHS NEW US$0.00000 (ZAILF) had reported short interest of 12,720,617 shares at the latest settlement date of February 27, 2026, compared with 11,197,217 shares in the prior report. That was a change of 1.5M shares, or +13.6%. Based on reported average daily volume of 0, the latest days-to-cover reading was 999.99.
The historical data currently tracked for ZAILF includes 67 reported entries from April 14, 2023 to February 27, 2026. During that span, reported short interest ranged between 400 and 12.9M shares.
Extreme edge-case readings may reflect unusually low reported average volume.
| Settlement Date | Short Interest | Prior Short Interest | Change Shares | Change % | Average Daily Volume | Days to Cover |
|---|---|---|---|---|---|---|
| February 27, 2026 | 12,720,617 | 11,197,217 | 1.5M | +13.6% | 0 | 999.99 |
| February 13, 2026 | 11,197,217 | 11,398,985 | -201.8K | -1.8% | 0 | 999.99 |
| January 30, 2026 | 11,398,985 | 11,656,485 | -257.5K | -2.2% | 0 | 999.99 |
| January 15, 2026 | 11,656,485 | 11,636,885 | 19.6K | +0.2% | 0 | 999.99 |
| December 31, 2025 | 11,636,885 | 10,671,585 | 965.3K | +9.1% | 0 | 999.99 |
| December 15, 2025 | 10,671,585 | 9,373,785 | 1.3M | +13.8% | 0 | 999.99 |
| November 28, 2025 | 9,373,785 | 8,873,885 | 499.9K | +5.6% | 0 | 999.99 |
| November 14, 2025 | 10,113,771 | 7,751,680 | 2.4M | +30.5% | 0 | 999.99 |
| October 31, 2025 | 7,751,680 | 8,131,701 | -380.0K | -4.7% | 0 | 999.99 |
| October 15, 2025 | 8,131,701 | 8,339,101 | -207.4K | -2.5% | 0 | 999.99 |
| September 15, 2025 | 12,920,979 | 10,048,062 | 2.9M | +28.6% | 0 | 999.99 |
| August 29, 2025 | 10,048,062 | 7,131,171 | 2.9M | +40.9% | 0 | 999.99 |
| August 15, 2025 | 7,131,171 | 5,333,542 | 1.8M | +33.7% | 0 | 999.99 |
| July 31, 2025 | 5,333,542 | 5,346,562 | -13.0K | -0.2% | 0 | 999.99 |
| July 15, 2025 | 5,346,562 | 5,256,742 | 89.8K | +1.7% | 0 | 999.99 |
| June 30, 2025 | 5,256,742 | 6,400,453 | -1.1M | -17.9% | 0 | 999.99 |
| June 13, 2025 | 6,400,453 | 4,991,763 | 1.4M | +28.2% | 0 | 999.99 |
| May 30, 2025 | 4,991,763 | 5,146,664 | -154.9K | -3.0% | 0 | 999.99 |
| May 15, 2025 | 5,146,664 | 5,278,381 | -131.7K | -2.5% | 0 | 999.99 |
| April 30, 2025 | 5,278,381 | 6,402,091 | -1.1M | -17.6% | 0 | 999.99 |
| April 15, 2025 | 6,402,091 | 4,945,171 | 1.5M | +29.5% | 0 | 999.99 |
| March 31, 2025 | 4,945,171 | 3,871,761 | 1.1M | +27.7% | 0 | 999.99 |
| February 28, 2025 | 3,949,431 | 3,340,542 | 608.9K | +18.2% | 0 | 999.99 |
| February 14, 2025 | 3,340,542 | 3,971,539 | -631.0K | -15.9% | 0 | 999.99 |
| January 31, 2025 | 3,971,539 | 4,057,539 | -86.0K | -2.1% | 0 | 999.99 |
| January 15, 2025 | 4,057,539 | 5,046,229 | -988.7K | -19.6% | 0 | 999.99 |
| December 31, 2024 | 5,046,229 | 4,838,629 | 207.6K | +4.3% | 0 | 999.99 |
| December 13, 2024 | 4,838,629 | 3,651,829 | 1.2M | +32.5% | 0 | 999.99 |
| November 29, 2024 | 3,651,829 | 3,316,168 | 335.7K | +10.1% | 0 | 999.99 |
| November 15, 2024 | 3,316,168 | 3,378,268 | -62.1K | -1.8% | 0 | 999.99 |
| October 31, 2024 | 3,378,268 | 3,057,468 | 320.8K | +10.5% | 0 | 999.99 |
| October 15, 2024 | 3,057,468 | 3,065,530 | -8.1K | -0.3% | 0 | 999.99 |
| September 30, 2024 | 3,065,530 | 3,083,030 | -17.5K | -0.6% | 0 | 999.99 |
| September 13, 2024 | 3,083,030 | 3,063,530 | 19.5K | +0.6% | 0 | 999.99 |
| August 30, 2024 | 3,063,530 | 3,113,630 | -50.1K | -1.6% | 0 | 999.99 |
| August 15, 2024 | 3,113,630 | 3,066,330 | 47.3K | +1.5% | 0 | 999.99 |
| July 31, 2024 | 3,066,330 | 3,063,530 | 2.8K | +0.1% | 0 | 999.99 |
| July 15, 2024 | 3,063,530 | 2,613,130 | 450.4K | +17.2% | 0 | 999.99 |
| June 28, 2024 | 2,613,130 | 2,613,130 | 0 | +0.0% | 0 | 999.99 |
| June 14, 2024 | 2,613,130 | 903,812 | 1.7M | +189.1% | 0 | 999.99 |
| May 31, 2024 | 903,812 | 1,010,412 | -106.6K | -10.6% | 84.5K | 10.69 |
| May 15, 2024 | 1,010,412 | 1,001,630 | 8.8K | +0.9% | 195.5K | 5.17 |
| April 30, 2024 | 1,001,630 | 1,054,430 | -52.8K | -5.0% | 0 | 999.99 |
| April 15, 2024 | 1,054,430 | 546,530 | 507.9K | +92.9% | 0 | 999.99 |
| March 28, 2024 | 546,530 | 1,188,177 | -641.6K | -54.0% | 0 | 999.99 |
| March 15, 2024 | 1,188,177 | 612,377 | 575.8K | +94.0% | 0 | 999.99 |
| February 29, 2024 | 612,377 | 840,179 | -227.8K | -27.1% | 0 | 999.99 |
| February 15, 2024 | 840,179 | 558,177 | 282.0K | +50.5% | 0 | 999.99 |
| January 31, 2024 | 558,177 | 579,477 | -21.3K | -3.7% | 0 | 999.99 |
| December 29, 2023 | 573,162 | 537,462 | 35.7K | +6.6% | 0 | 999.99 |
| December 15, 2023 | 537,462 | 1,363,362 | -825.9K | -60.6% | 0 | 999.99 |
| November 30, 2023 | 1,363,362 | 562,362 | 801.0K | +142.4% | 0 | 999.99 |
| November 15, 2023 | 562,362 | 291,731 | 270.6K | +92.8% | 0 | 999.99 |
| October 31, 2023 | 291,731 | 131,131 | 160.6K | +122.5% | 0 | 999.99 |
| October 13, 2023 | 131,131 | 450,831 | -319.7K | -70.9% | 0 | 999.99 |
| September 29, 2023 | 450,831 | 318,431 | 132.4K | +41.6% | 0 | 999.99 |
| September 15, 2023 | 318,431 | 3,324,131 | -3.0M | -90.4% | 0 | 999.99 |
| August 31, 2023 | 3,324,131 | 2,572,731 | 751.4K | +29.2% | 0 | 999.99 |
| August 15, 2023 | 2,572,731 | 1,601,500 | 971.2K | +60.6% | 0 | 999.99 |
| July 31, 2023 | 1,601,500 | 628,900 | 972.6K | +154.7% | 0 | 999.99 |
| July 14, 2023 | 628,900 | 334,000 | 294.9K | +88.3% | 0 | 999.99 |
| June 30, 2023 | 334,000 | 138,400 | 195.6K | +141.3% | 0 | 999.99 |
| June 15, 2023 | 138,400 | 114,000 | 24.4K | +21.4% | 0 | 999.99 |
| May 31, 2023 | 114,000 | 400 | 113.6K | +28400.0% | 0 | 999.99 |
| May 15, 2023 | 400 | 122,100 | -121.7K | -99.7% | 0 | 999.99 |
| April 28, 2023 | 122,100 | 411,090 | -289.0K | -70.3% | 0 | 999.99 |
| April 14, 2023 | 411,090 | 0 | 411.1K | +100.0% | 0 | 999.99 |