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HowShorted

NGG short interest NYSE

National Grid PLC. 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
1,429,665
vs previous settlement
+235,967 (+19.8%)
days to cover
1.39
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for NGG: 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
8
31 Aug 2026
Highest in window
136,493
12 Nov 2025
Days with a balance
55
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for National Grid PLC 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 136K shares.

History

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

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 20261,429,665+235,9671.39
31 Aug 20261,193,698โˆ’42,4551.58
14 Aug 20261,236,153+483,4171.82
31 Jul 2026752,736โˆ’40,0751.00
15 Jul 2026792,811โˆ’724,1061.00
30 Jun 20261,516,917+215,7191.03
15 Jun 20261,301,198โˆ’1,011,2781.35
29 May 20262,312,476+856,9281.68
15 May 20261,455,548+444,6861.00
30 Apr 20261,010,862+31,3491.13
15 Apr 2026979,513โˆ’15,0271.22
31 Mar 2026994,540โˆ’667,1011.00
13 Mar 20261,661,641โˆ’375,7761.30
27 Feb 20262,037,417โˆ’302,7581.50
13 Feb 20262,340,175+315,5991.77
30 Jan 20262,024,576+271,8592.74
15 Jan 20261,752,717+117,1702.40
31 Dec 20251,635,547+185,9703.43
15 Dec 20251,449,577+85,4142.65
28 Nov 20251,364,163โˆ’485,3881.84
14 Nov 20251,849,551+280,5222.60
31 Oct 20251,569,029+197,9102.54
15 Oct 20251,371,119+33,8551.93
30 Sep 20251,337,264โˆ’165,7882.34
15 Sep 20251,503,052+222,9672.48
29 Aug 20251,280,085โˆ’152,8202.84
15 Aug 20251,432,905โˆ’181,8112.33
31 Jul 20251,614,716+7451.71
15 Jul 20251,613,971โˆ’270,4481.73
30 Jun 20251,884,419+300,1161.67
13 Jun 20251,584,303โˆ’761,2171.54
30 May 20252,345,520+334,3472.06
15 May 20252,011,173โˆ’299,8151.70
30 Apr 20252,310,988+504,7732.19
15 Apr 20251,806,215+703,4621.54
31 Mar 20251,102,753+74,4492.15
14 Mar 20251,028,304โˆ’430,7031.64
28 Feb 20251,459,007โˆ’25,6082.48
14 Feb 20251,484,615+189,6892.60
31 Jan 20251,294,926+840,4361.12
15 Jan 2025454,490+123,0221.00
31 Dec 2024331,468โˆ’664,1961.00
13 Dec 2024995,664โˆ’17,4561.98
29 Nov 20241,013,120+395,1791.48
15 Nov 2024617,941+87,7161.08
31 Oct 2024530,225โˆ’308,8291.22
15 Oct 2024839,054โˆ’60,6701.84
30 Sep 2024899,724โˆ’312,3162.06
13 Sep 20241,212,040+52,1812.83
30 Aug 20241,159,859โˆ’13,7433.49
15 Aug 20241,173,602+83,5441.65
31 Jul 20241,090,058+6,6361.53
15 Jul 20241,083,422+225,4291.14
28 Jun 2024857,993+19,6931.00
14 Jun 2024838,300โˆ’2,194,1091.00
31 May 20243,032,409+30,1163.67
15 May 20243,002,293+286,98511.11
30 Apr 20242,715,308+66,7168.33
15 Apr 20242,648,592โˆ’127,5078.67
28 Mar 20242,776,099โˆ’14,4789.40
15 Mar 20242,790,577โˆ’344,5359.12
29 Feb 20243,135,112โˆ’515,0258.75
15 Feb 20243,650,137โˆ’464,6486.14
31 Jan 20244,114,785+1,135,6067.10
12 Jan 20242,979,179+529,7078.85
29 Dec 20232,449,472โˆ’154,6219.07
15 Dec 20232,604,093+263,7054.91
30 Nov 20232,340,388+535,7753.49
15 Nov 20231,804,613สณ+10,4155.09
31 Oct 20231,794,198โˆ’285,0194.65
13 Oct 20232,079,217+163,0264.56
29 Sep 20231,916,191+96,5665.87
15 Sep 20231,819,625โˆ’24,0195.74
31 Aug 20231,843,644โˆ’196,1926.81
15 Aug 20232,039,836โˆ’158,8555.40
31 Jul 20232,198,691+210,6757.62
14 Jul 20231,988,016+265,6776.13
30 Jun 20231,722,339+282,2696.04
15 Jun 20231,440,070+175,6303.80
31 May 20231,264,440+25,0053.28
15 May 20231,239,435+484,9942.44
28 Apr 2023754,441โˆ’89,3042.92
14 Apr 2023843,745+58,2022.40
31 Mar 2023785,543โˆ’90,5052.31
15 Mar 2023876,048+205,5462.54
28 Feb 2023670,502+79,2622.74
15 Feb 2023591,240+18,8392.19
31 Jan 2023572,401+17,7542.29
13 Jan 2023554,647+13,4671.40
30 Dec 2022541,180โˆ’95,6341.61
15 Dec 2022636,814โˆ’106,2411.58
30 Nov 2022743,055+108,4572.07
15 Nov 2022634,598+73,8761.24
31 Oct 2022560,722+203,4361.00
14 Oct 2022357,286โˆ’413,8291.00
30 Sep 2022771,115โˆ’177,3181.16
15 Sep 2022948,433โˆ’76,4612.15
31 Aug 20221,024,894+271,8882.48
15 Aug 2022753,006+92,1362.41
29 Jul 2022660,870+104,3082.24
15 Jul 2022556,562โˆ’89,4421.31
30 Jun 2022646,004โˆ’185,1271.26
15 Jun 2022831,131โˆ’152,5861.81
31 May 2022983,717+213,8002.45
13 May 2022769,917โˆ’27,5251.89
29 Apr 2022797,442โˆ’127,5652.14
14 Apr 2022925,007+255,2762.21
31 Mar 2022669,731โˆ’147,9312.18
15 Mar 2022817,662โˆ’49,0471.63
28 Feb 2022866,709+88,8451.95
15 Feb 2022777,864+174,0992.00
31 Jan 2022603,765โˆ’177,9241.28
14 Jan 2022781,689โˆ’164,3142.30
31 Dec 2021946,003+205,0753.02
15 Dec 2021740,928+47,7222.26
30 Nov 2021693,206+267,8162.45
15 Nov 2021425,390โˆ’107,8301.85
29 Oct 2021533,220+37,6921.68
15 Oct 2021495,528+208,9151.64
30 Sep 2021286,613โˆ’140,0631.00
15 Sep 2021426,676+112,6181.29
31 Aug 2021314,058+44,6411.27
13 Aug 2021269,417โˆ’20,4341.34
30 Jul 2021289,851โˆ’40,4481.00
15 Jul 2021330,299โˆ’1,3901.00
30 Jun 2021331,689โˆ’44,1341.18
15 Jun 2021375,823สณโˆ’125,8151.06
28 May 2021501,638+96,6591.84
14 May 2021404,979+26,6031.70
30 Apr 2021378,376+75,7461.31
15 Apr 2021302,630โˆ’6,3091.00
31 Mar 2021308,939โˆ’91,6361.00
15 Mar 2021400,575+14,2701.05
26 Feb 2021386,305+147,6591.36
12 Feb 2021238,646โˆ’59,2531.00
29 Jan 2021297,899โˆ’3,1451.10
15 Jan 2021301,044โˆ’48,2361.08
31 Dec 2020349,280โˆ’24,1461.25
15 Dec 2020373,426โˆ’733,0991.00
30 Nov 20201,106,525+615,6503.38
13 Nov 2020490,875โˆ’214,2221.69
30 Oct 2020705,097โˆ’101,9702.90
15 Oct 2020807,067+140,5422.09
30 Sep 2020666,525+127,3222.06
15 Sep 2020539,203โˆ’542,6131.55
31 Aug 20201,081,816+154,4334.47
14 Aug 2020927,383โˆ’57,3293.02
31 Jul 2020984,712+224,3583.39
15 Jul 2020760,354โˆ’311,1961.09
30 Jun 20201,071,550+299,4101.68
15 Jun 2020772,140+241,6552.04
29 May 2020530,485โˆ’442,0871.00
15 May 2020972,572สณ+234,0712.34
30 Apr 2020738,501+69,2521.85
15 Apr 2020669,249โˆ’134,4641.00
31 Mar 2020803,713โˆ’103,8661.00
13 Mar 2020907,579โˆ’227,7981.00
28 Feb 20201,135,377โˆ’166,5271.82
14 Feb 20201,301,904โˆ’117,8693.54
31 Jan 20201,419,773+596,2402.31
15 Jan 2020823,533โˆ’9,5721.87
31 Dec 2019833,105โˆ’423,0051.17
13 Dec 20191,256,110โˆ’477,3792.27
29 Nov 20191,733,489+769,1383.57
15 Nov 2019964,351+94,8311.76
31 Oct 2019869,520+205,7171.15
15 Oct 2019663,803+201,9321.00
30 Sep 2019461,871+108,0611.00
13 Sep 2019353,810โˆ’183,9981.00
30 Aug 2019537,808+255,6571.35
15 Aug 2019282,151โˆ’89,6831.00
31 Jul 2019371,834โˆ’123,7851.00
15 Jul 2019495,619โˆ’85,9141.06
28 Jun 2019581,533+79,1331.17
14 Jun 2019502,400โˆ’125,0911.00
31 May 2019627,491+232,6261.00
15 May 2019394,865โˆ’32,5681.00
30 Apr 2019427,433โˆ’58,5551.12
15 Apr 2019485,988โˆ’482,1221.00
29 Mar 2019968,110โˆ’82,0721.82
15 Mar 20191,050,182โˆ’259,1482.39
28 Feb 20191,309,330โˆ’36,6682.78
15 Feb 20191,345,998โˆ’210,3362.39
31 Jan 20191,556,334+165,6232.40
15 Jan 20191,390,711+497,0131.52
31 Dec 2018893,698+238,6931.00
14 Dec 2018655,005โˆ’31,3531.00
30 Nov 2018686,358+191,0811.00
15 Nov 2018495,277+50,1321.00
31 Oct 2018445,145โˆ’38,2921.00
15 Oct 2018483,437+11,2551.00
28 Sep 2018472,182โˆ’52,2001.00
14 Sep 2018524,382โˆ’117,7331.00
31 Aug 2018642,115+317,2891.25
15 Aug 2018324,826+68,9921.00
31 Jul 2018255,834โˆ’105,2881.00
13 Jul 2018361,122+74,3551.00
29 Jun 2018286,767โˆ’219,0231.00
15 Jun 2018505,790โˆ’331,0771.00
31 May 2018836,867+482,7821.58
15 May 2018354,085โˆ’55,4871.00
30 Apr 2018409,572โˆ’413,1511.00
13 Apr 2018822,723โˆ’300,6821.09
29 Mar 20181,123,405โˆ’401,8341.35
15 Mar 20181,525,239+388,2881.80
28 Feb 20181,136,951+75,2171.60
15 Feb 20181,061,734โˆ’103,9041.31
31 Jan 20181,165,638โˆ’74,2871.57
12 Jan 20181,239,925+127,1941.60
29 Dec 20171,112,731โ€“1.46

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

Questions

Frequently asked questions

What is NGG's short interest?
1,429,665 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 235,967 from the previous settlement.
Why is there no percentage for NGG?
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 NGG's days to cover?
1.39 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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