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HowShorted

How shorted is Instil Bio, Inc.? TIL

#2,754most shorted US stockof 3,805 ranked stocks, more shorted than 27%

2.39%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.08
5 reports (~10 weeks)
−1.07
days to cover
13.13
Aggregate net short position time series for Instil Bio, Inc.

Markers along the chart's base: ▲ results announced (an 8-K reporting results was filed) ▲ quarterly or annual report filed. Dates are SEC filing dates; hover a point to see events since the previous settlement.

Days to cover

FINRA's own figure: reported shares short divided by the stock's average daily trading volume, published alongside each settlement. It expresses the short position in days of typical trading rather than as a percentage of the company; the two can move differently.

Aggregate net short position time series for Instil Bio, Inc. days to cover

Short interest around results

For each results announcement (an 8-K reporting results, by its SEC filing date), the FINRA settlement before it and the first one after. Settlements fall twice a month, so the two figures can sit up to a month apart and much else changes in between: this shows what was reported, not why.

Reported short interest before and after each results announcement
Results filedSettlement beforeSettlement afterChange
13 Aug 20262.79% 31 Jul 20262.60% 14 Aug 2026−0.19
15 May 20263.84% 30 Apr 20263.43% 29 May 2026−0.41
27 Mar 20265.88% 13 Mar 20266.12% 31 Mar 2026+0.24
13 Nov 202510.23% 31 Oct 20258.13% 14 Nov 2025−2.10
13 Aug 202515.89% 31 Jul 202513.38% 15 Aug 2025−2.51
13 May 20258.61% 30 Apr 20256.94% 15 May 2025−1.67
4 Mar 20258.09% 28 Feb 20258.39% 14 Mar 2025+0.30
13 Aug 20240.25% 31 Jul 20240.18% 15 Aug 2024−0.07

Fails to deliver

The SEC's fails-to-deliver figure for TIL: 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
9 Sep 2026
Highest in window
42,991
18 Nov 2025
Days with a balance
78
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Instil Bio, Inc. 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 43K shares.

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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20262.39%+0.08
31 Aug 20262.31%−0.29
14 Aug 20262.60%−0.19
31 Jul 20262.79%−0.22
15 Jul 20263.01%−0.45
30 Jun 20263.46%+0.01
15 Jun 20263.45%+0.02
29 May 20263.43%+0.02
15 May 20263.41%−0.43
30 Apr 20263.84%−1.00
15 Apr 20264.84%−1.28
31 Mar 20266.12%+0.24
13 Mar 20265.88%−0.26
27 Feb 20266.14%−0.02
13 Feb 20266.16%−0.66
30 Jan 20266.82%−0.41
15 Jan 20267.23%−1.06
31 Dec 20258.29%+0.26
15 Dec 20258.03%−0.07
28 Nov 20258.10%−0.03
14 Nov 20258.13%−2.10
31 Oct 202510.23%−0.96
15 Oct 202511.19%−2.05
30 Sep 202513.24%−0.84
15 Sep 202514.08%0.00
29 Aug 202514.08%+0.70
15 Aug 202513.38%−2.51
31 Jul 202515.89%−1.40
15 Jul 202517.29%+1.60
30 Jun 202515.69%+3.24
13 Jun 202512.45%+3.11
30 May 20259.34%+2.40
15 May 20256.94%−1.67
30 Apr 20258.61%+0.19
15 Apr 20258.42%−0.24
31 Mar 20258.66%+0.27
14 Mar 20258.39%+0.30
28 Feb 20258.09%+0.43
14 Feb 20257.66%−3.02
31 Jan 202510.68%+0.43
15 Jan 202510.25%+1.24
31 Dec 20249.01%+2.06
13 Dec 20246.95%+3.21
29 Nov 20243.74%−0.91
15 Nov 20244.65%+4.44
30 Aug 20240.21%+0.03
15 Aug 20240.18%−0.07
31 Jul 20240.25%+0.13
28 Jun 20240.12%+0.04
14 Jun 20240.08%−0.01
31 May 20240.09%−0.04
15 May 20240.13%+0.02
30 Apr 20240.11%−0.03
15 Apr 20240.14%+0.01
28 Mar 20240.13%−0.28
30 Nov 20230.41%−0.20
15 Nov 20230.61%+0.09
31 Oct 20230.52%−0.16
13 Oct 20230.68%+0.17
29 Sep 20230.51%−0.07
15 Sep 20230.58%−0.04
31 Aug 20230.62%−0.24
15 Aug 20230.86%−0.09
31 Jul 20230.95%−0.01
14 Jul 20230.96%−0.20
30 Jun 20231.16%−1.28
15 Jun 20232.44%+0.06
31 May 20232.38%+0.07
15 May 20232.31%−0.29
28 Apr 20232.60%−0.19
14 Apr 20232.79%+0.06
31 Mar 20232.73%+0.04
15 Mar 20232.69%+0.43
28 Feb 20232.26%+0.03
15 Feb 20232.23%+0.38
31 Jan 20231.85%−0.47
13 Jan 20232.32%−0.59
30 Dec 20222.91%−0.05
15 Dec 20222.96%−0.80
30 Nov 20223.76%−0.27
15 Nov 20224.03%−2.99
31 Oct 20227.02%+0.11
14 Oct 20226.91%−0.27
30 Sep 20227.18%+0.39
15 Sep 20226.79%+0.06
31 Aug 20226.73%+0.10
15 Aug 20226.63%−0.24
29 Jul 20226.87%−0.16
15 Jul 20227.03%−0.37
30 Jun 20227.40%−0.46
15 Jun 20227.86%+0.99
31 May 20226.87%−0.14
13 May 20227.01%+0.19
29 Apr 20226.82%−0.13
14 Apr 20226.95%−0.17
31 Mar 20227.12%−0.43
15 Mar 20227.55%−0.07
28 Feb 20227.62%+0.15
15 Feb 20227.47%+1.08
31 Jan 20226.39%+0.46
14 Jan 20225.93%+0.27
31 Dec 20215.66%+1.05
15 Dec 20214.61%+0.49
30 Nov 20214.12%+0.65
15 Nov 20213.47%−0.02
29 Oct 20213.49%0.00
15 Oct 20213.49%−0.28
30 Sep 20213.77%−0.43
15 Sep 20214.20%−0.08
31 Aug 20214.28%−0.17
13 Aug 20214.45%+0.30
30 Jul 20214.15%+0.67
15 Jul 20213.48%+0.11
30 Jun 20213.37%+0.60
15 Jun 20212.77%+0.15
28 May 20212.62%+0.77
14 May 20211.85%–

Newest first. Scroll inside the table for earlier dates, back to 14 May 2021.

Frequently asked questions

How shorted is Instil Bio, Inc. right now?
2.39% of Instil Bio, Inc.'s (TIL) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 2,754th most shorted US stock, out of 3,805 we rank.
What does this number include?
FINRA member firms must report their short positions in all US equities twice a month; FINRA consolidates them per security. We divide that official share count by the company's shares outstanding from its SEC filings. This is the regulatory figure, not a daily estimate.
Why does it only update twice a month?
US short interest is reported for settlement on the 15th and the last business day of each month, and FINRA publishes the consolidated figures about nine business days later. That cadence is set by regulation; no daily official figure exists.
Is this TIL's short float?
No. This is short interest as a percentage of shares outstanding, the count in the company's SEC filings. "Short float" divides the same FINRA short count by the public float, which excludes closely held shares, so it comes out higher for the same company. We publish no float estimates: the float is not a regulatory figure.
What is TIL's days to cover?
13.13 days for settlement date 15 Sep 2026: FINRA's own short interest ratio, the reported shares short divided by average daily trading volume. It is published in the same FINRA file and shown verbatim; we hold no volume data ourselves.
Which funds are short?
US public short interest is aggregate-only: individual short sellers are not named. Only some EU markets publish named positions.