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TMB short interest Nasdaq Global Market

Thornburg ETF Trust Thornburg. FINRA's reported shares short for this symbol, twice a month by settlement date, shown as the regulator publishes them. No percentage is shown: no SEC filer maps to the symbol (funds, notes, preferreds, warrants and foreign listings).

Shares short
79,894
vs previous settlement
+24,602 (+44.5%)
days to cover
1.00
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for TMB: 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
34,164
14 Sep 2026
Highest in window
1,998,158
26 Mar 2026
Days with a balance
199
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Thornburg ETF Trust Thornburg 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 2.0M shares.

History

Every FINRA settlement we hold for TMB, newest first.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 202679,894+24,6021.00
31 Aug 202655,292+19,8421.00
14 Aug 202635,450+22,0021.00
31 Jul 202613,448+6,3711.00
15 Jul 20267,077−8,7661.00
30 Jun 202615,843−38,3771.00
15 Jun 202654,220+29,6331.00
29 May 202624,587+6,4341.51
15 May 202618,153−7,7401.00
30 Apr 202625,893+4,7931.00
15 Apr 202621,100−17,1771.00
31 Mar 202638,277+11,9201.00
13 Mar 202626,357−1,9811.00
27 Feb 202628,338−27,0431.00
13 Feb 202655,381+24,5293.51
30 Jan 202630,852+2,7571.07
15 Jan 202628,095+19,0582.00
31 Dec 20259,037+1,7421.00
15 Dec 20257,295+4,5131.18
28 Nov 20252,782−4,1881.00
14 Nov 20256,970+5,3691.00
31 Oct 20251,601−1,6111.00
15 Oct 20253,212−1,2581.00
30 Sep 20254,470−2,6151.00
15 Sep 20257,085−87,3971.00
29 Aug 202594,482+92,3304.10
15 Aug 20252,152−2,4961.00
31 Jul 20254,648−19,1471.00
15 Jul 202523,795+13,3743.31
30 Jun 202510,421+3,0381.00
13 Jun 20257,383−1,8711.25
30 May 20259,254+4,1391.03
15 May 20255,115+3,7131.00
30 Apr 20251,402−1,9001.00
15 Apr 20253,302−1,5431.08
31 Mar 20254,845+1,2951.00
14 Mar 20253,550−4,4081.00
28 Feb 20257,958−8,2571.00
14 Feb 202516,215–1.00

Scroll inside the table for earlier settlements, back to 14 Feb 2025.

Questions

Frequently asked questions

What is TMB's short interest?
79,894 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 24,602 from the previous settlement.
Why is there no percentage for TMB?
Because no defensible share count exists to divide by: no SEC filer maps to the symbol (funds, notes, preferreds, warrants and foreign listings). No SEC filer maps to this symbol in EDGAR's ticker file. That is the normal case for funds, exchange-traded notes, preferred shares, warrants, units and foreign listings, none of which file a share count we could divide by.
What is TMB'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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