What is RUBI's short interest?

40,481 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 1,540 from the previous settlement.

Why is there no percentage for RUBI?

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 RUBI'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.

RUBI short interest Nasdaq Capital Market

Rubico Inc. Common Stock. 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: 40,481
vs previous settlement: +1,540 (+4.0%)
days to cover: 1.00
Settlement date: 15 Sep 2026

Shares short over time

Days to cover

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

Fails to deliver

The SEC's fails-to-deliver figure for RUBI: 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: 6,775; 9 Sep 2026
Highest in window: 4,466,465; 10 Nov 2025
Days with a balance: 156
Window: 16 Sep 2025 to 14 Sep 2026

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 4.5M shares.

History

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

Full reported short interest history
Settlement date	Shares short	Change	Days to cover
15 Sep 2026	40,481	+1,540	1.00
31 Aug 2026	38,941	−1,073	1.00
14 Aug 2026	40,014	−10,871	1.00
31 Jul 2026	50,885	+45,830	1.00
15 Jul 2026	5,055	−15,274	1.00
30 Jun 2026	20,329	−893,775	1.00
15 Jun 2026	914,104	+869,927	1.00
29 May 2026	44,177	−119,627	1.00
15 May 2026	163,804	+103,429	2.10
30 Apr 2026	60,375	+771	1.00
15 Apr 2026	59,604	−197,901	1.00
31 Mar 2026	257,505	−239,916	1.00
13 Mar 2026	497,421	+383,568	1.00
27 Feb 2026	113,853	+52,149	1.00
13 Feb 2026	61,704	−59,171	1.00
30 Jan 2026	120,875	−101,824	1.00
15 Jan 2026	222,699	+21,210	1.00
31 Dec 2025	201,489	−83,675	1.00
15 Dec 2025	285,164	−5,397,090	1.00
28 Nov 2025	5,682,254	+465,427	1.00
14 Nov 2025	5,216,827	+4,968,714	1.00
31 Oct 2025	248,113	+91,350	1.00
15 Oct 2025	156,763	+14,670	3.17
30 Sep 2025	142,093	+118,023	1.57
15 Sep 2025	24,070	+10,682	1.00
29 Aug 2025	13,388	−66,438	1.00
15 Aug 2025	79,826	−10,729,464	1.00
30 Jun 2020	10,809,290	+1,501,156	5.12
15 Jun 2020	9,308,134	+1,335,080	3.05
29 May 2020	7,973,054	+820,645	2.72
15 May 2020	7,152,409ʳ	+1,881,162	2.53
30 Apr 2020	5,271,247	+1,150,331	2.77
15 Apr 2020	4,120,916	+1,155,306	1.57
31 Mar 2020	2,965,610	−1,541,514	1.55
13 Mar 2020	4,507,124	+932,096	2.45
28 Feb 2020	3,575,028	−356,931	1.66
14 Feb 2020	3,931,959	+281,940	4.26
31 Jan 2020	3,650,019	+199,984	2.70
15 Jan 2020	3,450,035	+694,919	1.72
31 Dec 2019	2,755,116	+48,750	2.44
13 Dec 2019	2,706,366	+459,730	4.32
29 Nov 2019	2,246,636	+65,292	2.47
15 Nov 2019	2,181,344	+297,147	3.04
31 Oct 2019	1,884,197	+288,434	3.93
15 Oct 2019	1,595,763	−225,662	2.90
30 Sep 2019	1,821,425	+396	2.47
13 Sep 2019	1,821,029	+529,990	2.45
30 Aug 2019	1,291,039	+23,527	1.58
15 Aug 2019	1,267,512	−229,263	1.00
31 Jul 2019	1,496,775	−34,075	2.27
15 Jul 2019	1,530,850	+608,636	2.87
28 Jun 2019	922,214	+291,538	1.00
14 Jun 2019	630,676	−250,640	1.18
31 May 2019	881,316	+416,407	1.21
15 May 2019	464,909	−30,247	1.00
30 Apr 2019	495,156	−140,860	1.00
15 Apr 2019	636,016	+237,353	1.18
29 Mar 2019	398,663	−319,564	1.00
15 Mar 2019	718,227	+328,975	1.00
28 Feb 2019	389,252	−160,783	1.00
15 Feb 2019	550,035	+213,385	1.44
31 Jan 2019	336,650	+63,495	1.13
15 Jan 2019	273,155	−13,152	1.50
31 Dec 2018	286,307	−69,569	1.00
14 Dec 2018	355,876	+11,596	1.00
30 Nov 2018	344,280	−106,715	1.00
15 Nov 2018	450,995	+132,073	1.00
31 Oct 2018	318,922	+98,635	1.56
15 Oct 2018	220,287	−100,241	1.00
28 Sep 2018	320,528	−120,922	1.45
14 Sep 2018	441,450	+29,326	1.93
31 Aug 2018	412,124	−42,030	1.82
15 Aug 2018	454,154	−5,385	1.00
31 Jul 2018	459,539	+20,340	1.00
13 Jul 2018	439,199	−64,886	1.00
29 Jun 2018	504,085	−1,581,644	1.00
15 Jun 2018	2,085,729	−260,084	4.57
31 May 2018	2,345,813	−259,764	4.53
15 May 2018	2,605,577	+4,115	6.14
30 Apr 2018	2,601,462	+162,013	5.85
13 Apr 2018	2,439,449	+414,603	4.49
29 Mar 2018	2,024,846	+531,371	2.76
15 Mar 2018	1,493,475	+109,704	2.16
28 Feb 2018	1,383,771	+96,588	3.69
15 Feb 2018	1,287,183	+448,306	2.53
31 Jan 2018	838,877	−5,042	1.00
12 Jan 2018	843,919	−17,403	1.00
29 Dec 2017	861,322	–	1.09

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

Questions

Frequently asked questions

What is RUBI's short interest?: 40,481 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 1,540 from the previous settlement.
Why is there no percentage for RUBI?: 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 RUBI'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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