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HowShorted

BST 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
121,701
vs previous settlement
+26,351 (+27.6%)
days to cover
1.20
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for BST: 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
49
14 Sep 2026
Highest in window
1,880
22 Dec 2025
Days with a balance
35
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 1.9K shares.

History

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

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 2026121,701+26,3511.20
31 Aug 202695,350+43,9261.22
14 Aug 202651,424+1,0151.00
31 Jul 202650,409+29,0921.00
15 Jul 202621,317โˆ’7,7501.00
30 Jun 202629,067+18,1631.00
15 Jun 202610,904โˆ’12,1451.00
29 May 202623,049+10,0251.00
15 May 202613,024+10,7241.00
30 Apr 20262,300โˆ’3,7251.00
15 Apr 20266,025โˆ’16,0601.00
31 Mar 202622,085โˆ’3,8771.00
13 Mar 202625,962+9,7881.00
27 Feb 202616,174โˆ’22,1601.00
13 Feb 202638,334+6941.00
30 Jan 202637,640+6241.00
15 Jan 202637,016โˆ’2051.00
31 Dec 202537,221+7,7791.00
15 Dec 202529,442+21,6361.00
28 Nov 20257,806โˆ’14,4061.00
14 Nov 202522,212โˆ’18,6031.00
31 Oct 202540,815โˆ’29,4011.00
15 Oct 202570,216+42,1711.00
30 Sep 202528,045+1,6771.00
15 Sep 202526,368โˆ’17,8101.00
29 Aug 202544,178โˆ’3,0581.00
15 Aug 202547,236+24,1581.00
31 Jul 202523,078โˆ’1,4891.00
15 Jul 202524,567โˆ’7001.00
30 Jun 202525,267โˆ’3,7871.00
13 Jun 202529,054+3,8051.00
30 May 202525,249โˆ’38,1931.00
15 May 202563,442+21,3191.00
30 Apr 202542,123โˆ’19,2681.00
15 Apr 202561,391+1,0661.00
31 Mar 202560,325+3,0671.00
14 Mar 202557,258+6,2171.00
28 Feb 202551,041โˆ’2,8041.00
14 Feb 202553,845โˆ’24,4281.00
31 Jan 202578,273+45,0901.00
15 Jan 202533,183+25,4561.00
31 Dec 20247,727+5,0241.00
13 Dec 20242,703โˆ’30,5471.00
29 Nov 202433,250โˆ’7,7661.00
15 Nov 202441,016+11,0791.00
31 Oct 202429,937โˆ’26,4641.00
15 Oct 202456,401+50,7191.00
30 Sep 20245,682+2,0571.00
13 Sep 20243,625โˆ’2,9691.00
30 Aug 20246,594+3,3401.00
15 Aug 20243,254โˆ’14,9111.00
31 Jul 202418,165+11,0341.00
15 Jul 20247,131โˆ’7,3971.00
28 Jun 202414,528โˆ’10,1011.00
14 Jun 202424,629โˆ’4,3411.00
31 May 202428,970โˆ’22,1641.00
15 May 202451,134+30,5381.00
30 Apr 202420,596+9,1911.00
15 Apr 202411,405โˆ’13,5011.00
28 Mar 202424,906โˆ’4,8851.00
15 Mar 202429,791โˆ’23,0451.00
29 Feb 202452,836โˆ’20,1731.00
15 Feb 202473,009+35,2511.00
31 Jan 202437,758+13,3291.00
12 Jan 202424,429โˆ’8,9581.00
29 Dec 202333,387โˆ’13,2581.00
15 Dec 202346,645+3,9781.00
30 Nov 202342,667โˆ’91,7681.00
15 Nov 2023134,435โˆ’42,8571.47
31 Oct 2023177,292+7,8491.67
13 Oct 2023169,443+87,3071.92
29 Sep 202382,136+4,8261.00
15 Sep 202377,310โˆ’6,9791.00
31 Aug 202384,289โˆ’43,1511.00
15 Aug 2023127,440+34,0761.36
31 Jul 202393,364โˆ’3,7501.08
14 Jul 202397,114โˆ’27,2051.06
30 Jun 2023124,319โˆ’19,4951.23
15 Jun 2023143,814โˆ’37,6271.18
31 May 2023181,441โˆ’29,2171.67
15 May 2023210,658โˆ’11,4562.77
28 Apr 2023222,114โˆ’7163.00
14 Apr 2023222,830โˆ’13,6992.67
31 Mar 2023236,529โˆ’56,0582.51
15 Mar 2023292,587+68,0502.39
28 Feb 2023224,537โˆ’107,9781.84
15 Feb 2023332,515โˆ’22,3792.09
31 Jan 2023354,894+126,8762.72
13 Jan 2023228,018+106,6801.46
30 Dec 2022121,338+1,5701.00
15 Dec 2022119,768โˆ’22,0251.00
30 Nov 2022141,793โˆ’15,3041.18
15 Nov 2022157,097+85,6161.01
31 Oct 202271,481+56,7391.00
14 Oct 202214,742โˆ’12,6671.00
30 Sep 202227,409โˆ’138,6901.00
15 Sep 2022166,099+38,8961.18
31 Aug 2022127,203โˆ’3,5781.06
15 Aug 2022130,781+99,7471.00
29 Jul 202231,034โˆ’38,7191.00
15 Jul 202269,753+28,0821.00
30 Jun 202241,671โˆ’7,4491.00
15 Jun 202249,120โˆ’111,3001.00
31 May 2022160,420+30,7271.02
13 May 2022129,693+93,2851.00
29 Apr 202236,408+26,9411.00
14 Apr 20229,467โˆ’15,5901.00
31 Mar 202225,057โˆ’82,5041.00
15 Mar 2022107,561+82,5811.00
28 Feb 202224,980โˆ’32,8381.00
15 Feb 202257,818+42,7411.00
31 Jan 202215,077โˆ’78,5531.00
14 Jan 202293,630+75,8961.00
31 Dec 202117,734+2,4051.00
15 Dec 202115,329+9,4041.00
30 Nov 20215,925โˆ’6,3851.00
15 Nov 202112,310โˆ’20,0501.00
29 Oct 202132,360โˆ’4,5291.00
15 Oct 202136,889+24,2261.00
30 Sep 202112,663+2,7311.00
15 Sep 20219,932+5,9681.00
31 Aug 20213,964โˆ’4,3831.00
13 Aug 20218,347โˆ’17,2301.00
30 Jul 202125,577โˆ’378,1981.00
15 Jul 2021403,775+27,5181.51
30 Jun 2021376,257+218,9983.55
15 Jun 2021157,259สณ+44,0961.57
28 May 2021113,163+1,2202.08
14 May 2021111,943+9221.43
30 Apr 2021111,021โˆ’11,7282.25
15 Apr 2021122,749+53,1521.58
31 Mar 202169,597+5,4821.02
15 Mar 202164,115+2691.00
26 Feb 202163,846โˆ’60,1321.00
12 Feb 2021123,978+101,9861.47
29 Jan 202121,992+12,0901.00
15 Jan 20219,902โˆ’28,8981.00
31 Dec 202038,800โˆ’22,6731.00
15 Dec 202061,473+16,3061.00
30 Nov 202045,167โˆ’3,6661.00
13 Nov 202048,833+40,3121.00
30 Oct 20208,521โˆ’57,7411.00
15 Oct 202066,262+24,7901.00
30 Sep 202041,472+32,0531.00
15 Sep 20209,419โˆ’22,8961.00
31 Aug 202032,315+9,3521.00
14 Aug 202022,963+6,8361.00
31 Jul 202016,127+7,1571.00
15 Jul 20208,970โˆ’941.00
30 Jun 20209,064โˆ’32,1841.00
15 Jun 202041,248โˆ’16,6601.00
29 May 202057,908+16,4341.00
15 May 202041,474โˆ’20,6411.00
30 Apr 202062,115+33,2411.00
15 Apr 202028,874+1,0491.00
31 Mar 202027,825+12,3181.00
13 Mar 202015,507+12,7941.00
28 Feb 20202,713+7071.00
14 Feb 20202,006โˆ’13,1831.00
31 Jan 202015,189โˆ’26,4131.00
15 Jan 202041,602+18,8981.00
31 Dec 201922,704โˆ’6,0561.00
13 Dec 201928,760+5,4171.00
29 Nov 201923,343+1,2281.00
15 Nov 201922,115+8,2371.00
31 Oct 201913,878โˆ’4,0801.00
15 Oct 201917,958โˆ’2,5881.00
30 Sep 201920,546โˆ’6,4211.00
13 Sep 201926,967โˆ’6,9401.00
30 Aug 201933,907+13,0151.00
15 Aug 201920,892โˆ’1,2911.00
31 Jul 201922,183โˆ’16,4361.00
15 Jul 201938,619+30,3201.00
28 Jun 20198,299โˆ’6861.00
14 Jun 20198,985โˆ’10,6631.00
31 May 201919,648+7,0831.00
15 May 201912,565โˆ’8,6611.00
30 Apr 201921,226โˆ’8,1981.00
15 Apr 201929,424โˆ’37,3661.00
29 Mar 201966,790โˆ’25,2791.00
15 Mar 201992,069โˆ’40,6371.18
28 Feb 2019132,706โˆ’7,1801.65
15 Feb 2019139,886+40,9681.45
31 Jan 201998,918โˆ’18,3941.00
15 Jan 2019117,312+65,3761.11
31 Dec 201851,936โˆ’56,7721.00
14 Dec 2018108,708+46,2721.00
30 Nov 201862,436+40,7311.00
15 Nov 201821,705+17,9511.00
31 Oct 20183,754โˆ’114,4131.00
15 Oct 2018118,167+24,7301.00
28 Sep 201893,437+33,1071.13
14 Sep 201860,330+12,6461.00
31 Aug 201847,684โˆ’9,8091.00
15 Aug 201857,493โˆ’33,2921.00
31 Jul 201890,785+38,9631.00
13 Jul 201851,822โˆ’3771.00
29 Jun 201852,199โˆ’41,1551.00
15 Jun 201893,354โˆ’10,5051.00
31 May 2018103,859โˆ’3301.10
15 May 2018104,189+76,1441.00
30 Apr 201828,045โˆ’29,0881.00
13 Apr 201857,133โˆ’40,0191.00
29 Mar 201897,152โˆ’68,1851.00
15 Mar 2018165,337+35,5621.00
28 Feb 2018129,775+24,7101.00
15 Feb 2018105,065+14,5671.00
31 Jan 201890,498+74,2621.00
12 Jan 201816,236สณโˆ’131.00
29 Dec 201716,249โ€“1.00

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

Questions

Frequently asked questions

What is BST's short interest?
121,701 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 26,351 from the previous settlement.
Why is there no percentage for BST?
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 BST's days to cover?
1.20 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.