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HowShorted

XLO short interest Nasdaq Capital Market

Xilio Therapeutics, Inc. Commo. 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
412,963
vs previous settlement
−5,314 (-1.3%)
days to cover
37.36
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for XLO: 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
115
14 Sep 2026
Highest in window
251,568
7 Nov 2025
Days with a balance
156
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Xilio Therapeutics, Inc. Commo 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 252K shares.

History

Every FINRA settlement we hold for XLO, newest first.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 2026412,963−5,31437.36
31 Aug 2026418,277−3,64439.07
14 Aug 2026421,921−3,96131.63
31 Jul 2026425,882+157,70212.28
15 Jul 2026268,180+93,5614.52
30 Jun 2026174,619+1,1493.65
15 Jun 2026173,470+8,1967.09
29 May 2026165,274−6,0965.43
15 May 2026171,370+8,4121.80
30 Apr 2026162,958−11,3614.94
15 Apr 2026174,319−8,1735.92
31 Mar 2026182,492−2,049,2243.13
13 Mar 20262,231,716+117,9684.64
27 Feb 20262,113,748−41,8146.77
13 Feb 20262,155,562+16,1593.58
30 Jan 20262,139,403+50,5564.14
15 Jan 20262,088,847−79,7615.83
31 Dec 20252,168,608−919,7608.04
15 Dec 20253,088,368−3,587,4524.19
28 Nov 20256,675,820−237,36117.93
14 Nov 20256,913,181+756,8735.92
31 Oct 20256,156,308+904,7228.58
15 Oct 20255,251,586+89,23012.42
30 Sep 20255,162,356+238,59413.34
15 Sep 20254,923,762+623,0013.37
29 Aug 20254,300,761−8,00610.85
15 Aug 20254,308,767+486,9289.52
31 Jul 20253,821,839+483,55810.34
15 Jul 20253,338,281+21,22110.69
30 Jun 20253,317,060+692,3327.08
13 Jun 20252,624,728+1,833,2462.04
30 May 2025791,482−427,6921.30
15 May 20251,219,174+868,0171.00
30 Apr 2025351,157−211,1221.74
15 Apr 2025562,279−82,2562.74
31 Mar 2025644,535+69,0872.50
14 Mar 2025575,448−119,1631.00
28 Feb 2025694,611−1,115,7421.00
14 Feb 20251,810,353+1,611,3041.00
31 Jan 2025199,049−14,0221.00
15 Jan 2025213,071−171,0231.00
31 Dec 2024384,094+264,6541.00
13 Dec 2024119,440−55,8291.46
29 Nov 2024175,269+133,3111.13
15 Nov 202441,958−354,1271.00
31 Oct 2024396,085+291,3391.00
15 Oct 2024104,746−35,3441.00
30 Sep 2024140,090+125,3401.00
13 Sep 202414,750−16,2731.00
30 Aug 202431,023−80,2521.00
15 Aug 2024111,275−7,2901.00
31 Jul 2024118,565−26,3611.05
15 Jul 2024144,926+27,2601.24
28 Jun 2024117,666+42,6971.00
14 Jun 202474,969−370,0461.00
31 May 2024445,015+25,9412.00
15 May 2024419,074−37,4322.12
30 Apr 2024456,506+77,0161.61
15 Apr 2024379,490+325,2531.00
28 Mar 202454,237−3,3901.00
15 Mar 202457,627+36,4561.00
29 Feb 202421,171−12,5771.00
15 Feb 202433,748+32,1571.00
31 Jan 20241,591−4,8641.00
12 Jan 20246,455+5,0521.00
29 Dec 20231,403−17,1471.00
15 Dec 202318,550−35,5201.00
30 Nov 202354,070+25,1011.12
15 Nov 202328,969+3,7191.14
31 Oct 202325,250−1,2692.44
13 Oct 202326,519+1,8851.48
29 Sep 202324,634+12,2741.47
15 Sep 202312,360−41,4951.00
31 Aug 202353,855−1,5847.57
15 Aug 202355,439−4,15812.55
31 Jul 202359,597−18,3607.14
14 Jul 202377,957−3,7597.33
30 Jun 202381,716−70,0733.52
15 Jun 2023151,789−41,3305.67
31 May 2023193,119−6,43945.42
15 May 2023199,558+1,93211.14
28 Apr 2023197,626−27,10212.57
14 Apr 2023224,728+46,0723.97
31 Mar 2023178,656+65,9378.75
15 Mar 2023112,719+69,4943.54
28 Feb 202343,225+18,8741.20
15 Feb 202324,351−40,8731.00
31 Jan 202365,224+46,0321.00
13 Jan 202319,192−8,7881.00
30 Dec 202227,980+5081.00
15 Dec 202227,472−1971.90
30 Nov 202227,669+2,9281.00
15 Nov 202224,741+6,3131.41
31 Oct 202218,428−12,9301.00
14 Oct 202231,358−16,2041.00
30 Sep 202247,562−8,6211.00
15 Sep 202256,183+23,5811.00
31 Aug 202232,602−27,1011.00
15 Aug 202259,703+31,8691.00
29 Jul 202227,834−25,7931.00
15 Jul 202253,627−25,0721.00
30 Jun 202278,699−148,6851.00
15 Jun 2022227,384−102,0571.58
31 May 2022329,441−10,3464.13
13 May 2022339,787+13,5518.34
29 Apr 2022326,236+104,3644.89
14 Apr 2022221,872−19,2917.91
31 Mar 2022241,163+4,45610.95
15 Mar 2022236,707+7,7919.32
28 Feb 2022228,916−8,4789.28
15 Feb 2022237,394−12,0066.38
31 Jan 2022249,400−43,4508.75
14 Jan 2022292,850−108,0557.75
31 Dec 2021400,905+17,0181.76
15 Dec 2021383,887−9502.32
30 Nov 2021384,837+180,6522.84
15 Nov 2021204,185+88,4671.83
29 Oct 2021115,718–1.00

Scroll inside the table for earlier settlements, back to 29 Oct 2021.

Questions

Frequently asked questions

What is XLO's short interest?
412,963 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, down 5,314 from the previous settlement.
Why is there no percentage for XLO?
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 XLO's days to cover?
37.36 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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