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HowShorted

DYN short interest Nasdaq Global Market

Dyne Therapeutics, Inc. Common. 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
23,381,047
vs previous settlement
+2,590,378 (+12.5%)
days to cover
5.46
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for DYN: 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
2,345
14 Sep 2026
Highest in window
285,203
11 Mar 2026
Days with a balance
52
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Dyne Therapeutics, Inc. Common 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 285K shares.

History

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

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 202623,381,047+2,590,3785.46
31 Aug 202620,790,669โˆ’669,13013.54
14 Aug 202621,459,799โˆ’510,74110.95
31 Jul 202621,970,540+479,3607.18
15 Jul 202621,491,180โˆ’810,84310.64
30 Jun 202622,302,023โˆ’510,4667.99
15 Jun 202622,812,489+536,81714.33
29 May 202622,275,672+1,292,02414.63
15 May 202620,983,648+249,70216.76
30 Apr 202620,733,946โˆ’970,14911.45
15 Apr 202621,704,095+1,238,50413.44
31 Mar 202620,465,591+1,362,2278.45
13 Mar 202619,103,364โˆ’214,1836.59
27 Feb 202619,317,547+165,03710.91
13 Feb 202619,152,510โˆ’36,52111.52
30 Jan 202619,189,031+299,9079.12
15 Jan 202618,889,124+1,593,7388.32
31 Dec 202517,295,386+2,345,9869.02
15 Dec 202514,949,400โˆ’2,509,2193.55
28 Nov 202517,458,619+346,6817.12
14 Nov 202517,111,938+1,993,5616.52
31 Oct 202515,118,377โˆ’1,979,0334.74
15 Oct 202517,097,410โˆ’677,0397.40
30 Sep 202517,774,449+2,470,9146.33
15 Sep 202515,303,535โˆ’740,6217.64
29 Aug 202516,044,156โˆ’1,097,0516.44
15 Aug 202517,141,207+834,8054.84
31 Jul 202516,306,402+576,0506.64
15 Jul 202515,730,352โˆ’641,8133.79
30 Jun 202516,372,165โˆ’4,249,7414.86
13 Jun 202520,621,906โˆ’4,906,9679.08
30 May 202525,528,873+2,329,93818.00
15 May 202523,198,935+8,339,8906.78
30 Apr 202514,859,045โˆ’408,8975.74
15 Apr 202515,267,942+3,926,2234.92
31 Mar 202511,341,719โˆ’1,041,4985.64
14 Mar 202512,383,217+715,8747.38
28 Feb 202511,667,343+771,9487.68
14 Feb 202510,895,395+1,336,8827.06
31 Jan 20259,558,513+155,6902.99
15 Jan 20259,402,823โˆ’1,113,0613.68
31 Dec 202410,515,884+116,08411.24
13 Dec 202410,399,800+47,50414.02
29 Nov 202410,352,296+199,75210.42
15 Nov 202410,152,544+208,6668.10
31 Oct 20249,943,878+833,60512.11
15 Oct 20249,110,273+230,83911.98
30 Sep 20248,879,434+1,219,4206.19
13 Sep 20247,660,014+792,3982.76
30 Aug 20246,867,616โˆ’510,7078.21
15 Aug 20247,378,323โˆ’2,502,8737.18
31 Jul 20249,881,196+639,08611.37
15 Jul 20249,242,110+166,0429.64
28 Jun 20249,076,068โˆ’956,1926.04
14 Jun 202410,032,260โˆ’82,55611.73
31 May 202410,114,816+759,1394.25
15 May 20249,355,677โˆ’277,98611.81
30 Apr 20249,633,663+610,02712.47
15 Apr 20249,023,636+946,6289.96
28 Mar 20248,077,008+1,254,0915.37
15 Mar 20246,822,917+213,2503.27
29 Feb 20246,609,667โˆ’638,4224.99
15 Feb 20247,248,089โˆ’1,306,6506.68
31 Jan 20248,554,739+585,8175.62
12 Jan 20247,968,922โˆ’1,810,7441.22
29 Dec 20239,779,666+49,53415.94
15 Dec 20239,730,132+1,039,20012.64
30 Nov 20238,690,932+1,231,38111.70
15 Nov 20237,459,551+283,32711.15
31 Oct 20237,176,224+1,008,18012.20
13 Oct 20236,168,044+298,53113.47
29 Sep 20235,869,513+370,70110.17
15 Sep 20235,498,812โˆ’129,8859.42
31 Aug 20235,628,697โˆ’69,60218.05
15 Aug 20235,698,299+507,83618.30
31 Jul 20235,190,463โˆ’225,47413.63
14 Jul 20235,415,937โˆ’60,74614.34
30 Jun 20235,476,683+603,6774.63
15 Jun 20234,873,006โˆ’69,3659.88
31 May 20234,942,371สณโˆ’50,94614.97
15 May 20234,993,317+109,1248.46
28 Apr 20234,884,193+2,55722.41
14 Apr 20234,881,636+596,71310.30
31 Mar 20234,284,923+213,4068.89
15 Mar 20234,071,517+297,74916.45
28 Feb 20233,773,768สณ+76,35515.79
15 Feb 20233,697,413+144,37714.28
31 Jan 20233,553,036+710,33812.81
13 Jan 20232,842,698+395,5808.19
30 Dec 20222,447,118โˆ’311,26810.94
15 Dec 20222,758,386+60,1394.46
30 Nov 20222,698,247โˆ’150,45413.69
15 Nov 20222,848,701+70,71015.89
31 Oct 20222,777,991+525,53211.44
14 Oct 20222,252,459+492,87012.82
30 Sep 20221,759,589+488,8204.82
15 Sep 20221,270,769+66,2533.29
31 Aug 20221,204,516+186,6125.85
15 Aug 20221,017,904+141,4413.91
29 Jul 2022876,463โˆ’148,8205.34
15 Jul 20221,025,283โˆ’2,793,4034.77
30 Jun 20223,818,686+41,16915.82
15 Jun 20223,777,517+2,197,31020.32
31 May 20221,580,207โˆ’45,56411.22
13 May 20221,625,771โˆ’39,69811.57
29 Apr 20221,665,469+14,58010.88
14 Apr 20221,650,889+19,72516.57
31 Mar 20221,631,164โˆ’46,7759.03
15 Mar 20221,677,939โˆ’679,5509.89
28 Feb 20222,357,489+68,27512.13
15 Feb 20222,289,214+117,70612.89
31 Jan 20222,171,508โˆ’551,0933.75
14 Jan 20222,722,601โˆ’69,33914.90
31 Dec 20212,791,940+13,04912.96
15 Dec 20212,778,891+44,27414.61
30 Nov 20212,734,617+77,52615.61
15 Nov 20212,657,091+353,10412.55
29 Oct 20212,303,987+149,97512.71
15 Oct 20212,154,012+60,66413.40
30 Sep 20212,093,348+442,9988.67
15 Sep 20211,650,350+147,9744.97
31 Aug 20211,502,376โˆ’716,3277.28
13 Aug 20212,218,703+177,3967.17
30 Jul 20212,041,307+170,37510.91
15 Jul 20211,870,932+39,13312.11
30 Jun 20211,831,799โˆ’12,7934.15
15 Jun 20211,844,592สณ+9,5598.71
28 May 20211,835,033โˆ’66,07212.02
14 May 20211,901,105+127,27911.20
30 Apr 20211,773,826โˆ’206,8816.55
15 Apr 20211,980,707+202,1239.25
31 Mar 20211,778,584โˆ’102,4657.87
15 Mar 20211,881,049+154,3985.03
26 Feb 20211,726,651+121,3955.51
12 Feb 20211,605,256+151,7294.43
29 Jan 20211,453,527+57,5311.24
15 Jan 20211,395,996โˆ’240,0679.03
31 Dec 20201,636,063+692,2813.40
15 Dec 2020943,782โˆ’276,8326.45
30 Nov 20201,220,614+17,4077.02
13 Nov 20201,203,207+380,4233.38
30 Oct 2020822,784+320,1783.38
15 Oct 2020502,606+427,3612.20
30 Sep 202075,245โˆ’17,573,5511.00
29 Mar 201817,648,796+746,1187.47
15 Mar 201816,902,678+414,0215.01
28 Feb 201816,488,657โˆ’382,8988.70
15 Feb 201816,871,555โˆ’1,576,1454.42
31 Jan 201818,447,700โˆ’1,982,3176.25
12 Jan 201820,430,017โˆ’1,465,2067.20
29 Dec 201721,895,223โ€“4.35

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

Questions

Frequently asked questions

What is DYN's short interest?
23,381,047 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 2,590,378 from the previous settlement.
Why is there no percentage for DYN?
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 DYN's days to cover?
5.46 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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