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HowShorted

BSTZ short interest NYSE

BlackRock Science and Technolo. 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
76,716
vs previous settlement
โˆ’17,592 (-18.7%)
days to cover
1.00
Settlement date
15 Sep 2026

Shares short over time

Aggregate net short position time series for BSTZ 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 BSTZ days to cover

Fails to deliver

The SEC's fails-to-deliver figure for BSTZ: 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.

Last balance on file
1,716
3 Sep 2026
Highest in window
202,673
20 Jan 2026
Days with a balance
58
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for BlackRock Science and Technolo 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 203K shares.

History

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

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 202676,716โˆ’17,5921.00
31 Aug 202694,308โˆ’8,6861.00
14 Aug 2026102,994+11,9621.00
31 Jul 202691,032+48,9871.00
15 Jul 202642,045+18,4101.00
30 Jun 202623,635โˆ’78,4131.00
15 Jun 2026102,048โˆ’25,9091.00
29 May 2026127,957+16,9601.00
15 May 2026110,997+72,2841.00
30 Apr 202638,713โˆ’19,2461.00
15 Apr 202657,959+5401.00
31 Mar 202657,419+28,3741.00
13 Mar 202629,045โˆ’4,7921.00
27 Feb 202633,837โˆ’10,4741.00
13 Feb 202644,311+27,8801.00
30 Jan 202616,431โˆ’238,2531.00
15 Jan 2026254,684+178,7911.00
31 Dec 202575,893โˆ’172,0051.00
15 Dec 2025247,898+32,0981.50
28 Nov 2025215,800โˆ’5,1281.07
14 Nov 2025220,928+126,2321.02
31 Oct 202594,696โˆ’86,6861.00
15 Oct 2025181,382+22,0431.00
30 Sep 2025159,339+88,1131.00
15 Sep 202571,226โˆ’48,1461.00
29 Aug 2025119,372+24,2601.00
15 Aug 202595,112+1,6981.00
31 Jul 202593,414โˆ’81,2431.00
15 Jul 2025174,657+139,8521.00
30 Jun 202534,805+2,0961.00
13 Jun 202532,709โˆ’108,9041.00
30 May 2025141,613+25,6971.00
15 May 2025115,916โˆ’6,1801.00
30 Apr 2025122,096โˆ’1,0491.00
15 Apr 2025123,145โˆ’148,7911.00
31 Mar 2025271,936+95,0281.16
14 Mar 2025176,908+57,5321.00
28 Feb 2025119,376+41,3401.00
14 Feb 202578,036+14,6011.00
31 Jan 202563,435โˆ’23,5691.00
15 Jan 202587,004+14,1621.00
31 Dec 202472,842+6101.00
13 Dec 202472,232โˆ’62,9441.00
29 Nov 2024135,176โˆ’16,4961.00
15 Nov 2024151,672+87,7091.00
31 Oct 202463,963+18,0831.00
15 Oct 202445,880โˆ’82,5071.00
30 Sep 2024128,387โˆ’68,2791.00
13 Sep 2024196,666+1,0641.00
30 Aug 2024195,602โˆ’14,0231.10
15 Aug 2024209,625+5,9471.00
31 Jul 2024203,678+85,4891.00
15 Jul 2024118,189โˆ’4,4541.00
28 Jun 2024122,643โˆ’87,0501.00
14 Jun 2024209,693โˆ’118,9341.10
31 May 2024328,627+271,9481.05
15 May 202456,679+26,5521.00
30 Apr 202430,127โˆ’19,4141.00
15 Apr 202449,541โˆ’17,4221.00
28 Mar 202466,963โˆ’7,4541.00
15 Mar 202474,417โˆ’16,1891.00
29 Feb 202490,606โˆ’18,3431.00
15 Feb 2024108,949+41,8331.00
31 Jan 202467,116+34,6721.00
12 Jan 202432,444+20,3141.00
29 Dec 202312,130โˆ’9,4721.00
15 Dec 202321,602โˆ’95,9421.00
30 Nov 2023117,544+64,1711.00
15 Nov 202353,373สณ+28,4631.00
31 Oct 202324,910+1,7461.00
13 Oct 202323,164โˆ’32,4931.00
29 Sep 202355,657+35,9181.00
15 Sep 202319,739+6,6941.00
31 Aug 202313,045โˆ’93,2651.00
15 Aug 2023106,310+95,8951.00
31 Jul 202310,415โˆ’47,9211.00
14 Jul 202358,336+55,9771.00
30 Jun 20232,359โˆ’15,3431.00
15 Jun 202317,702+5,2991.00
31 May 202312,403+1,6951.00
15 May 202310,708โˆ’87,3581.00
28 Apr 202398,066โˆ’326,3371.00
14 Apr 2023424,403+332,3961.88
31 Mar 202392,007+68,0371.00
15 Mar 202323,970โˆ’4,1691.00
28 Feb 202328,139โˆ’84,3291.00
15 Feb 2023112,468โˆ’8,1141.00
31 Jan 2023120,582+58,4061.00
13 Jan 202362,176+18,4211.00
30 Dec 202243,755โˆ’31,4121.00
15 Dec 202275,167+29,4681.00
30 Nov 202245,699+27,0181.00
15 Nov 202218,681+8431.00
31 Oct 202217,838โˆ’60,0461.00
14 Oct 202277,884+64,3531.00
30 Sep 202213,531+2,7511.00
15 Sep 202210,780โˆ’11,1251.00
31 Aug 202221,905+2011.00
15 Aug 202221,704+12,0241.00
29 Jul 20229,680โˆ’55,5701.00
15 Jul 202265,250+57,3051.00
30 Jun 20227,945โˆ’8,9441.00
15 Jun 202216,889+3,9291.00
31 May 202212,960โˆ’5,6301.00
13 May 202218,590โˆ’247,0611.00
29 Apr 2022265,651โˆ’95,5601.24
14 Apr 2022361,211+345,8911.29
31 Mar 202215,320+2,0921.00
15 Mar 202213,228+1,6741.00
28 Feb 202211,554โˆ’12,0711.00
15 Feb 202223,625โˆ’62,6551.00
31 Jan 202286,280+25,8031.00
14 Jan 202260,477โˆ’136,0231.00
31 Dec 2021196,500+154,0781.00
15 Dec 202142,422โˆ’7,0521.00
30 Nov 202149,474โˆ’73,3601.00
15 Nov 2021122,834+101,6091.14
29 Oct 202121,225โˆ’8,1511.00
15 Oct 202129,376+10,5101.00
30 Sep 202118,866โˆ’1,3661.00
15 Sep 202120,232+1191.00
31 Aug 202120,113โˆ’41,0701.00
13 Aug 202161,183+44,8571.00
30 Jul 202116,326โˆ’5,3991.00
15 Jul 202121,725+3,0341.00
30 Jun 202118,691โˆ’1,9121.00
15 Jun 202120,603+7,1351.00
28 May 202113,468+4,0201.00
14 May 20219,448โˆ’2531.00
30 Apr 20219,701โˆ’55,5511.00
15 Apr 202165,252+3,8561.00
31 Mar 202161,396+36,7551.00
15 Mar 202124,641+16,6001.00
26 Feb 20218,041โˆ’2,1191.00
12 Feb 202110,160+3,1881.00
29 Jan 20216,972โˆ’5,7591.00
15 Jan 202112,731โˆ’25,8101.00
31 Dec 202038,541โˆ’24,3111.00
15 Dec 202062,852โˆ’8,0211.00
30 Nov 202070,873+13,7131.00
13 Nov 202057,160+16,9481.00
30 Oct 202040,212โˆ’63,3711.00
15 Oct 2020103,583+99,6771.00
30 Sep 20203,906โˆ’8,2221.00
15 Sep 202012,128โˆ’7,4881.00
31 Aug 202019,616โˆ’39,3311.00
14 Aug 202058,947+11,7871.00
31 Jul 202047,160+45,0021.00
15 Jul 20202,158โˆ’2,2371.00
30 Jun 20204,395โˆ’9,4481.00
15 Jun 202013,843+10,8561.00
29 May 20202,987โˆ’2,0201.00
15 May 20205,007โˆ’7,1221.00
30 Apr 202012,129โˆ’57,9491.00
15 Apr 202070,078+53,1981.00
31 Mar 202016,880+3,5911.00
13 Mar 202013,289+6,8791.00
28 Feb 20206,410โˆ’3,2331.00
14 Feb 20209,643+6,9881.00
31 Jan 20202,655+1,4301.00
15 Jan 20201,225โˆ’4,0061.00
31 Dec 20195,231โˆ’57,5891.00
13 Dec 201962,820โˆ’10,7441.00
29 Nov 201973,564โˆ’16,3071.00
15 Nov 201989,871+16,8921.00
31 Oct 201972,979+59,1951.00
15 Oct 201913,784โˆ’18,8091.00
30 Sep 201932,593+1,7711.00
13 Sep 201930,822โˆ’1,1371.00
30 Aug 201931,959โˆ’21,0671.00
15 Aug 201953,026+10,7471.00
31 Jul 201942,279โˆ’31,9311.00
15 Jul 201974,210+32,9241.00
28 Jun 201941,286โ€“1.00

Scroll inside the table for earlier settlements, back to 28 Jun 2019.

Questions

Frequently asked questions

What is BSTZ's short interest?
76,716 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, down 17,592 from the previous settlement.
Why is there no percentage for BSTZ?
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 BSTZ's days to cover?
1.00 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.

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