Skip to content
HowShorted

SIMO short interest Nasdaq Global Market

Silicon Motion Technology Corp. 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
1,964,720
vs previous settlement
+323,850 (+19.7%)
days to cover
2.38
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for SIMO: 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
104
27 Aug 2026
Highest in window
26,447
11 Aug 2026
Days with a balance
43
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Silicon Motion Technology Corp 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 26K shares.

History

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

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 20261,964,720+323,8502.38
31 Aug 20261,640,870+185,5331.99
14 Aug 20261,455,337+647,9051.01
31 Jul 2026807,432+95,9411.00
15 Jul 2026711,491โˆ’69,5971.10
30 Jun 2026781,088โˆ’155,9011.00
15 Jun 2026936,989โˆ’134,1401.00
29 May 20261,071,129+441,0871.00
15 May 2026630,042+114,0231.00
30 Apr 2026516,019+203,7131.00
15 Apr 2026312,306โˆ’30,3981.00
31 Mar 2026342,704โˆ’107,8261.00
13 Mar 2026450,530โˆ’87,4081.00
27 Feb 2026537,938โˆ’129,8441.06
13 Feb 2026667,782+73,1111.00
30 Jan 2026594,671โˆ’116,0521.00
15 Jan 2026710,723+47,9971.00
31 Dec 2025662,726+171,3882.77
15 Dec 2025491,338+21,9091.72
28 Nov 2025469,429+202,9121.25
14 Nov 2025266,517โˆ’73,5961.00
31 Oct 2025340,113โˆ’63,9711.00
15 Oct 2025404,084โˆ’227,8471.00
30 Sep 2025631,931โˆ’199,8381.79
15 Sep 2025831,769+64,8072.70
29 Aug 2025766,962+8,5073.66
15 Aug 2025758,455โˆ’55,2472.69
31 Jul 2025813,702โˆ’155,7242.00
15 Jul 2025969,426โˆ’93,6023.64
30 Jun 20251,063,028โˆ’21,0322.83
13 Jun 20251,084,060โˆ’179,1483.15
30 May 20251,263,208+613,3592.09
15 May 2025649,849+16,6361.11
30 Apr 2025633,213โˆ’251,0241.09
15 Apr 2025884,237โˆ’163,9281.57
31 Mar 20251,048,165+39,2812.75
14 Mar 20251,008,884+42,7692.33
28 Feb 2025966,115+37,4502.10
14 Feb 2025928,665โˆ’32,1371.72
31 Jan 2025960,802+171,1862.84
15 Jan 2025789,616+62,1702.92
31 Dec 2024727,446+27,3792.80
13 Dec 2024700,067+46,3202.39
29 Nov 2024653,747+12,5801.68
15 Nov 2024641,167โˆ’22,3852.45
31 Oct 2024663,552โˆ’16,1352.64
15 Oct 2024679,687โˆ’97,3063.64
30 Sep 2024776,993โˆ’206,9842.36
13 Sep 2024983,977+112,4334.51
30 Aug 2024871,544โˆ’55,9622.88
15 Aug 2024927,506+120,4101.99
31 Jul 2024807,096โˆ’73,0741.82
15 Jul 2024880,170+208,7633.57
28 Jun 2024671,407โˆ’285,6491.83
14 Jun 2024957,056โˆ’59,4522.29
31 May 20241,016,508+63,6083.58
15 May 2024952,900+21,1011.90
30 Apr 2024931,799+91,6563.63
15 Apr 2024840,143โˆ’36,7792.14
28 Mar 2024876,922โˆ’177,9062.27
15 Mar 20241,054,828+65,9693.55
29 Feb 2024988,859โˆ’63,0503.11
15 Feb 20241,051,909โˆ’360,4231.84
31 Jan 20241,412,332โˆ’621,1082.28
12 Jan 20242,033,440+700,4273.62
29 Dec 20231,333,013+272,1903.35
15 Dec 20231,060,823+111,5432.34
30 Nov 2023949,280+42,6823.11
15 Nov 2023906,598สณ+40,3022.01
31 Oct 2023866,296โˆ’214,6652.55
13 Oct 20231,080,961+249,9332.24
29 Sep 2023831,028โˆ’266,4432.35
15 Sep 20231,097,471+219,3683.11
31 Aug 2023878,103โˆ’905,3121.28
15 Aug 20231,783,415โˆ’758,7072.49
31 Jul 20232,542,122+797,4421.00
14 Jul 20231,744,680+231,3233.16
30 Jun 20231,513,357+261,5421.63
15 Jun 20231,251,815+457,7452.04
31 May 2023794,070+46,6101.10
15 May 2023747,460โˆ’48,0732.14
28 Apr 2023795,533โˆ’257,1112.98
14 Apr 20231,052,644โˆ’168,4295.41
31 Mar 20231,221,073โˆ’1,034,4862.83
15 Mar 20232,255,559+484,3066.84
28 Feb 20231,771,253+315,7522.82
15 Feb 20231,455,501โˆ’449,1563.22
31 Jan 20231,904,657+172,1618.31
13 Jan 20231,732,496โˆ’15,3045.74
30 Dec 20221,747,800+174,8699.51
15 Dec 20221,572,931+345,1394.89
30 Nov 20221,227,792+33,8697.20
15 Nov 20221,193,923โˆ’1,008,8043.69
31 Oct 20222,202,727+210,3095.12
14 Oct 20221,992,418โˆ’2,2744.96
30 Sep 20221,994,692+740,4454.83
15 Sep 20221,254,247+559,8973.37
31 Aug 2022694,350+162,9842.50
15 Aug 2022531,366โˆ’11,0201.13
29 Jul 2022542,386โˆ’211,8621.69
15 Jul 2022754,248+30,8492.12
30 Jun 2022723,399โˆ’11,4151.79
15 Jun 2022734,814+40,8111.88
31 May 2022694,003+193,7211.00
13 May 2022500,282โˆ’142,8881.00
29 Apr 2022643,170โˆ’464,8781.00
14 Apr 20221,108,048+53,6411.26
31 Mar 20221,054,407+23,5662.27
15 Mar 20221,030,841+104,1162.61
28 Feb 2022926,725+273,5472.61
15 Feb 2022653,178โˆ’114,1321.38
31 Jan 2022767,310โˆ’158,5501.18
14 Jan 2022925,860โˆ’100,3111.92
31 Dec 20211,026,171+311,4092.15
15 Dec 2021714,762โˆ’197,5381.35
30 Nov 2021912,300+5,1534.50
15 Nov 2021907,147โˆ’46,6593.90
29 Oct 2021953,806โˆ’151,7294.34
15 Oct 20211,105,535โˆ’13,4424.22
30 Sep 20211,118,977โˆ’137,3744.61
15 Sep 20211,256,351+24,6554.38
31 Aug 20211,231,696+258,8623.80
13 Aug 2021972,834+181,8131.54
30 Jul 2021791,021โˆ’27,6752.05
15 Jul 2021818,696โˆ’93,9692.77
30 Jun 2021912,665+8,0454.15
15 Jun 2021904,620+8,7694.07
28 May 2021895,851+124,4722.38
14 May 2021771,379+206,6561.33
30 Apr 2021564,723+73,6651.44
15 Apr 2021491,058+114,0601.01
31 Mar 2021376,998โˆ’277,6621.01
15 Mar 2021654,660+328,8121.16
26 Feb 2021325,848โˆ’23,5981.00
12 Feb 2021349,446+157,1841.00
29 Jan 2021192,262โˆ’19,2701.00
15 Jan 2021211,532โˆ’1,8491.00
31 Dec 2020213,381โˆ’75,8141.03
15 Dec 2020289,195+88,5281.00
30 Nov 2020200,667โˆ’9,9841.00
13 Nov 2020210,651โˆ’90,5001.00
30 Oct 2020301,151+61,1261.47
15 Oct 2020240,025โˆ’315,5591.00
30 Sep 2020555,584+216,6982.20
15 Sep 2020338,886+31,4901.72
31 Aug 2020307,396+10,7231.59
14 Aug 2020296,673โˆ’307,0181.00
31 Jul 2020603,691+321,0411.81
15 Jul 2020282,650+41,1071.00
30 Jun 2020241,543โˆ’34,1371.00
15 Jun 2020275,680โˆ’48,5671.12
29 May 2020324,247+67,4511.00
15 May 2020256,796สณ+144,9881.37
30 Apr 2020111,808โˆ’77,8041.00
15 Apr 2020189,612+30,3111.00
31 Mar 2020159,301โˆ’44,1581.00
13 Mar 2020203,459โˆ’12,6831.00
28 Feb 2020216,142โˆ’25,0701.00
14 Feb 2020241,212โˆ’40,2411.00
31 Jan 2020281,453โˆ’236,4031.23
15 Jan 2020517,856โˆ’61,9502.36
31 Dec 2019579,806โˆ’13,4142.90
13 Dec 2019593,220+83,2652.61
29 Nov 2019509,955+34,3312.89
15 Nov 2019475,624โˆ’311,6492.24
31 Oct 2019787,273+115,6492.02
15 Oct 2019671,624+169,6941.94
30 Sep 2019501,930โˆ’134,4842.02
13 Sep 2019636,414+41,7133.60
30 Aug 2019594,701+62,4052.51
15 Aug 2019532,296โˆ’221,0821.06
31 Jul 2019753,378โˆ’46,0742.05
15 Jul 2019799,452+49,1832.38
28 Jun 2019750,269โˆ’5,0032.89
14 Jun 2019755,272สณโˆ’76,5514.06
31 May 2019831,823+38,1663.44
15 May 2019793,657+116,7031.97
30 Apr 2019676,954+30,1671.49
15 Apr 2019646,787โˆ’17,0392.09
29 Mar 2019663,826โˆ’91,7612.76
15 Mar 2019755,587+17,6352.93
28 Feb 2019737,952+9,9052.35
15 Feb 2019728,047โˆ’227,1282.53
31 Jan 2019955,175+134,8341.40
15 Jan 2019820,341+89,3452.22
31 Dec 2018730,996+94,1141.66
14 Dec 2018636,882โˆ’44,4621.95
30 Nov 2018681,344+86,7981.77
15 Nov 2018594,546โˆ’616,6791.19
31 Oct 20181,211,225โˆ’66,8251.99
15 Oct 20181,278,050+30,0222.72
28 Sep 20181,248,028โˆ’124,1684.66
14 Sep 20181,372,196โˆ’204,3404.80
31 Aug 20181,576,536โˆ’628,7906.09
15 Aug 20182,205,326โˆ’1,000,0403.98
31 Jul 20183,205,366โˆ’202,1768.90
13 Jul 20183,407,542โˆ’19,50610.27
29 Jun 20183,427,048โˆ’286,9147.35
15 Jun 20183,713,962โˆ’567,41615.28
31 May 20184,281,378+209,57818.54
15 May 20184,071,800โˆ’96,32617.14
30 Apr 20184,168,126โˆ’152,48014.19
13 Apr 20184,320,606+204,82215.63
29 Mar 20184,115,784โˆ’3,12810.99
15 Mar 20184,118,912+81,54610.34
28 Feb 20184,037,366โˆ’304,76111.52
15 Feb 20184,342,127+825,7316.55
31 Jan 20183,516,396+305,1174.58
12 Jan 20183,211,279โˆ’236,0994.16
29 Dec 20173,447,378โ€“17.69

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

Questions

Frequently asked questions

What is SIMO's short interest?
1,964,720 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 323,850 from the previous settlement.
Why is there no percentage for SIMO?
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 SIMO's days to cover?
2.38 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.

Ranked companies with a percentage: most shorted US stocks. Other symbols with counts only: shares short without a percentage. Browse by name: US companies A to Z.