Skip to content
HowShorted

ZLAB short interest Nasdaq Global Market

Zai Lab Limited American Depos. FINRA's reported shares short for this symbol, twice a month by settlement date, shown as the regulator publishes them. No percentage is shown: an SEC filer exists but no defensible share count is available yet.

Shares short
8,156,879
vs previous settlement
+139,694 (+1.7%)
days to cover
9.19
Settlement date
15 Sep 2026

Shares short over time

Aggregate net short position time series for ZLAB shares short

Days to cover

FINRA's own figure: reported shares short divided by the security's average daily trading volume, published alongside each settlement.

Aggregate net short position time series for ZLAB days to cover

Fails to deliver

The SEC's fails-to-deliver figure for ZLAB: the aggregate net balance of shares that failed to be delivered at each settlement date, published by the SEC twice a month and shown here verbatim for the trailing window. A balance is not a daily flow, and a fail has many ordinary causes; the SEC says it cannot guarantee the accuracy of the data. See what fails to deliver are and the largest balances today.

Latest balance
4,740
14 Sep 2026
Highest in window
182,717
17 Apr 2026
Days with a balance
98
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Zai Lab Limited American Depos fails to deliver

Source: U.S. Securities and Exchange Commission, fails-to-deliver data (public domain). Only settlement days with a positive balance appear; the largest balance in the window was 183K shares.

History

Every FINRA settlement we hold for ZLAB, newest first. สณ marks a figure FINRA itself flagged as revised.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 20268,156,879+139,6949.19
31 Aug 20268,017,185+551,2987.33
14 Aug 20267,465,887+931,4365.35
31 Jul 20266,534,451+182,55810.85
15 Jul 20266,351,893โˆ’1,802,1457.49
30 Jun 20268,154,038+903,3707.97
15 Jun 20267,250,668+717,9736.63
29 May 20266,532,695+1,345,5278.49
15 May 20265,187,168+733,1956.76
30 Apr 20264,453,973โˆ’1,043,7475.14
15 Apr 20265,497,720+165,0686.96
31 Mar 20265,332,652+441,7046.79
13 Mar 20264,890,948+1,090,5377.24
27 Feb 20263,800,411+428,9579.55
13 Feb 20263,371,454โˆ’216,8034.01
30 Jan 20263,588,257โˆ’282,6975.47
15 Jan 20263,870,954โˆ’378,0424.20
31 Dec 20254,248,996โˆ’1,051,5624.85
15 Dec 20255,300,558+262,6916.93
28 Nov 20255,037,867+434,7495.42
14 Nov 20254,603,118โˆ’419,7894.67
31 Oct 20255,022,907+211,7315.52
15 Oct 20254,811,176โˆ’88,01710.15
30 Sep 20254,899,193+17,1378.19
15 Sep 20254,882,056+139,5524.25
29 Aug 20254,742,504โˆ’34,8609.62
15 Aug 20254,777,364+203,4498.33
31 Jul 20254,573,915+591,6174.92
15 Jul 20253,982,298โˆ’69,9206.37
30 Jun 20254,052,218โˆ’336,5145.02
13 Jun 20254,388,732โˆ’720,4983.66
30 May 20255,109,230+133,7155.99
15 May 20254,975,515โˆ’1,673,2385.15
30 Apr 20256,648,753โˆ’1,121,7326.21
15 Apr 20257,770,485+446,7033.68
31 Mar 20257,323,782โˆ’597,0768.50
14 Mar 20257,920,858+91,9707.79
28 Feb 20257,828,888+251,3324.58
14 Feb 20257,577,556โˆ’136,79712.47
31 Jan 20257,714,353+1,662,98513.35
15 Jan 20256,051,368+112,5329.57
31 Dec 20245,938,836+92,87916.10
13 Dec 20245,845,957+679,7467.21
29 Nov 20245,166,211+279,1913.97
15 Nov 20244,887,020+225,0263.79
31 Oct 20244,661,994โˆ’87,0184.28
15 Oct 20244,749,012โˆ’112,2336.31
30 Sep 20244,861,245โˆ’554,5148.14
13 Sep 20245,415,759+482,3147.87
30 Aug 20244,933,445+218,8878.06
15 Aug 20244,714,558+558,5037.46
31 Jul 20244,156,055+1,196,9846.59
15 Jul 20242,959,071+137,8807.72
28 Jun 20242,821,191+28,2135.84
14 Jun 20242,792,978+83,0625.75
31 May 20242,709,916โˆ’567,1434.25
15 May 20243,277,059โˆ’1,082,6363.34
30 Apr 20244,359,695+282,0289.44
15 Apr 20244,077,667+210,3018.14
28 Mar 20243,867,366+203,6535.46
15 Mar 20243,663,713โˆ’400,2016.75
29 Feb 20244,063,914โˆ’624,9836.32
15 Feb 20244,688,897โˆ’215,1495.37
31 Jan 20244,904,046+117,9866.43
12 Jan 20244,786,060+586,47312.14
29 Dec 20234,199,587+141,2626.95
15 Dec 20234,058,325+195,4936.68
30 Nov 20233,862,832โˆ’188,08511.39
15 Nov 20234,050,917+280,8849.34
31 Oct 20233,770,033+705,3457.67
13 Oct 20233,064,688โˆ’179,8368.82
29 Sep 20233,244,524โˆ’120,46610.91
15 Sep 20233,364,990+87,8657.33
31 Aug 20233,277,125+129,7786.07
15 Aug 20233,147,347+92,6216.97
31 Jul 20233,054,726+107,8287.43
14 Jul 20232,946,898+8,7347.66
30 Jun 20232,938,164โˆ’189,8325.06
15 Jun 20233,127,996โˆ’138,5223.71
31 May 20233,266,518+1,1564.06
15 May 20233,265,362โˆ’62,4057.34
28 Apr 20233,327,767+33,3928.20
14 Apr 20233,294,375โˆ’127,9636.72
31 Mar 20233,422,338+157,7374.54
15 Mar 20233,264,601+363,3784.27
28 Feb 20232,901,223โˆ’20,1086.19
15 Feb 20232,921,331+33,2476.54
31 Jan 20232,888,084+167,2664.23
13 Jan 20232,720,818+29,6211.72
30 Dec 20222,691,197+115,2625.11
15 Dec 20222,575,935โˆ’285,9186.41
30 Nov 20222,861,853โˆ’106,8256.94
15 Nov 20222,968,678โˆ’21,2463.11
31 Oct 20222,989,924โˆ’41,1534.01
14 Oct 20223,031,077+65,4087.55
30 Sep 20222,965,669โˆ’183,2024.24
15 Sep 20223,148,871+258,1633.99
31 Aug 20222,890,708โˆ’15,1987.51
15 Aug 20222,905,906+116,6657.34
29 Jul 20222,789,241โˆ’192,3055.61
15 Jul 20222,981,546+326,1495.54
30 Jun 20222,655,397โˆ’361,6673.95
15 Jun 20223,017,064โˆ’200,4243.39
31 May 20223,217,488โˆ’95,7335.12
13 May 20223,313,221+151,3334.87
29 Apr 20223,161,888+107,3757.10
14 Apr 20223,054,513โˆ’543,1438.13
31 Mar 20223,597,656+233,4532.89
15 Mar 20223,364,203+236,8012.07
28 Feb 20223,127,402โˆ’179,5565.09
15 Feb 20223,306,958โˆ’204,3455.30
31 Jan 20223,511,303+262,2545.37
14 Jan 20223,249,049+404,5996.03
31 Dec 20212,844,450โˆ’194,2784.28
15 Dec 20213,038,728+243,3643.90
30 Nov 20212,795,364โˆ’97,9864.50
15 Nov 20212,893,350+103,7294.87
29 Oct 20212,789,621+13,3307.79
15 Oct 20212,776,291โˆ’281,0615.19
30 Sep 20213,057,352+530,8893.75
15 Sep 20212,526,463โˆ’8,0977.11
31 Aug 20212,534,560+50,1255.23
13 Aug 20212,484,435โˆ’168,0806.23
30 Jul 20212,652,515+454,2952.71
15 Jul 20212,198,220+70,0475.70
30 Jun 20212,128,173โˆ’439,6424.35
15 Jun 20212,567,815สณโˆ’381,4446.38
28 May 20212,949,259โˆ’1,5858.39
14 May 20212,950,844+453,3245.55
30 Apr 20212,497,520+166,4693.64
15 Apr 20212,331,051+342,8713.96
31 Mar 20211,988,180+71,6104.98
15 Mar 20211,916,570+453,0784.69
26 Feb 20211,463,492โˆ’168,0523.91
12 Feb 20211,631,544+39,2405.71
29 Jan 20211,592,304โˆ’398,4063.48
15 Jan 20211,990,710โˆ’117,4286.68
31 Dec 20202,108,138โˆ’350,5198.68
15 Dec 20202,458,657โˆ’116,1028.60
30 Nov 20202,574,759+29,4307.52
13 Nov 20202,545,329โˆ’166,0316.44
30 Oct 20202,711,360โˆ’450,8409.74
15 Oct 20203,162,200โˆ’359,41812.41
30 Sep 20203,521,618+860,7665.73
15 Sep 20202,660,852+120,7429.39
31 Aug 20202,540,110โˆ’135,8458.64
14 Aug 20202,675,955โˆ’68,8958.21
31 Jul 20202,744,850โˆ’74,53710.97
15 Jul 20202,819,387+66,9247.92
30 Jun 20202,752,463โˆ’217,0296.13
15 Jun 20202,969,492+517,3826.76
29 May 20202,452,110+446,5044.75
15 May 20202,005,606สณ+109,4747.55
30 Apr 20201,896,132โˆ’22,2366.81
15 Apr 20201,918,368โˆ’266,5336.19
31 Mar 20202,184,901โˆ’445,0805.79
13 Mar 20202,629,981โˆ’18,7686.83
28 Feb 20202,648,749+457,1953.14
14 Feb 20202,191,554+393,8504.55
31 Jan 20201,797,704+69,3612.87
15 Jan 20201,728,343+213,9948.90
31 Dec 20191,514,349+145,1907.95
13 Dec 20191,369,159โˆ’87,5999.38
29 Nov 20191,456,758+7,3407.58
15 Nov 20191,449,418โˆ’194,7797.90
31 Oct 20191,644,197โˆ’66,0739.80
15 Oct 20191,710,270+26,13115.10
30 Sep 20191,684,139โˆ’50,10812.50
13 Sep 20191,734,247+9,2308.45
30 Aug 20191,725,017โˆ’74,5406.47
15 Aug 20191,799,557+4,8488.11
31 Jul 20191,794,709+35,99810.48
15 Jul 20191,758,711+114,0619.47
28 Jun 20191,644,650+88,8797.98
14 Jun 20191,555,771สณ+338,6896.09
31 May 20191,217,082+53,5195.55
15 May 20191,163,563+159,9033.02
30 Apr 20191,003,660+238,8976.87
15 Apr 2019764,763โˆ’35,0045.42
29 Mar 2019799,767+26,9246.67
15 Mar 2019772,843+31,3825.27
28 Feb 2019741,461+54,7765.85
15 Feb 2019686,685+94,2633.12
31 Jan 2019592,422+38,6413.22
15 Jan 2019553,781โˆ’54,5942.86
31 Dec 2018608,375+40,6943.66
14 Dec 2018567,681+15,6992.05
30 Nov 2018551,982+1,33910.20
15 Nov 2018550,643โˆ’67,6369.12
31 Oct 2018618,279+198,7455.56
15 Oct 2018419,534โˆ’780,0341.81
28 Sep 20181,199,568+61,8114.81
14 Sep 20181,137,757โˆ’192,8651.46
31 Aug 20181,330,622โˆ’135,53212.72
15 Aug 20181,466,154โˆ’85,20718.96
31 Jul 20181,551,361โˆ’1,90723.70
13 Jul 20181,553,268โˆ’94,29523.88
29 Jun 20181,647,563โˆ’59,85528.44
15 Jun 20181,707,418+63,33418.44
31 May 20181,644,084โˆ’116,09310.86
15 May 20181,760,177โˆ’94,61020.07
30 Apr 20181,854,787โˆ’20530.75
13 Apr 20181,854,992โˆ’49,83429.20
29 Mar 20181,904,826+138,59124.44
15 Mar 20181,766,235+136,61123.53
28 Feb 20181,629,624+284,21520.71
15 Feb 20181,345,409+10,43712.04
31 Jan 20181,334,972+103,07017.39
12 Jan 20181,231,902+74,35819.11
29 Dec 20171,157,544โ€“10.16

Scroll inside the table for earlier settlements, back to 29 Dec 2017.

Questions

Frequently asked questions

What is ZLAB's short interest?
8,156,879 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 139,694 from the previous settlement.
Why is there no percentage for ZLAB?
Because no defensible share count exists to divide by: an SEC filer exists but no defensible share count is available yet. The symbol maps to an SEC filer, but its share count cannot be used yet. A newly listed company needs two cover-page counts on file before the first is trusted; a split or an unexplained jump pauses publication until a fresh SEC count corroborates it; a secondary share class publishes under the company's primary line; and a foreign filer's short count is in depositary-share units. This page upgrades to a percentage automatically once a defensible count exists.
What is ZLAB's days to cover?
9.19 days for settlement date 15 Sep 2026: FINRA's own short interest ratio, the reported shares short divided by average daily trading volume, published in the same file and shown verbatim. We hold no volume data ourselves.
Is this the short float?
No. This page shows FINRA's share count only. Short float divides that count by the public float, and short interest as we publish it elsewhere divides it by shares outstanding from SEC filings. Neither denominator is available for this line, so neither ratio is shown.
How often does this update?
FINRA member firms report short positions as of the 15th and the last business day of each month, and FINRA publishes the consolidated figures about nine business days later. We ingest each file the day it appears and re-read recent settlements for revisions.

Ranked companies with a percentage: most shorted US stocks. Other symbols with counts only: shares short without a percentage. Browse by name: US companies A to Z.