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Simpson Manufacturing Co., Inc.

SSD
Exchange
NYSE
Industry
Cutlery, Handtools & General Hardware
SEC CIK
0000920371

In the last 90 days, Simpson Manufacturing Co., Inc. insiders filed 0 open-market purchases and 1 sale; 493 institutions reported holding it in 13F filings for Q2 2026, worth $8.59B in total; ValueAct Capital is the only superinvestor holding it.

Four kinds of short-selling data, each measuring something different:

  • Short interest: shares sold short and not yet bought back, as of a settlement date. FINRA publishes it twice a month, about eight business days after the settlement date.
  • Daily short volume: shares sold short each day in off-exchange trades reported to FINRA. It counts trades, not open positions, and is published the next day.
  • Fails-to-deliver: shares not delivered by the settlement date. The SEC publishes them twice a month, about two weeks late.
  • ATS (dark pool) volume: weekly volume on alternative trading systems and other off-exchange venues. FINRA publishes it two to four weeks after the week.

More in the glossary.

Short interest

Shares sold short and not yet bought back, from FINRA, on every settlement date in the last two years.

Short interest
1.61M
Shares, settlement Oct 30, 2026
Change
+100.4K
+6.7% vs. Oct 15, 2026
Days to cover
3.95
Short interest ÷ average daily volume
Average daily volume
407.2K
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 1,015,289 sharesNov 15, 2024: 857,679 sharesNov 29, 2024: 841,532 sharesDec 13, 2024: 987,907 sharesDec 31, 2024: 892,985 sharesJan 15, 2025: 930,958 sharesJan 31, 2025: 850,889 sharesFeb 14, 2025: 752,360 sharesFeb 28, 2025: 821,735 sharesMar 14, 2025: 798,161 sharesMar 31, 2025: 901,779 sharesApr 15, 2025: 952,831 sharesApr 30, 2025: 1,002,638 sharesMay 15, 2025: 1,081,719 sharesMay 30, 2025: 1,256,270 sharesJun 13, 2025: 1,360,207 sharesJun 30, 2025: 1,253,317 sharesJul 15, 2025: 1,421,425 sharesJul 31, 2025: 1,327,102 sharesAug 15, 2025: 1,295,088 sharesAug 29, 2025: 1,217,234 sharesSep 15, 2025: 1,081,089 sharesSep 30, 2025: 1,032,153 sharesOct 15, 2025: 1,097,810 sharesOct 31, 2025: 1,201,166 sharesNov 14, 2025: 1,168,222 sharesNov 28, 2025: 1,090,032 sharesDec 15, 2025: 1,076,860 sharesDec 31, 2025: 1,058,611 sharesJan 15, 2026: 1,124,240 sharesJan 30, 2026: 1,105,352 sharesFeb 13, 2026: 1,231,743 sharesFeb 27, 2026: 1,190,290 sharesMar 13, 2026: 1,367,679 sharesMar 31, 2026: 1,258,384 sharesApr 15, 2026: 1,055,167 sharesApr 30, 2026: 1,268,707 sharesMay 15, 2026: 1,359,849 sharesMay 29, 2026: 1,487,415 sharesJun 15, 2026: 1,448,568 sharesJun 30, 2026: 1,414,778 sharesJul 15, 2026: 1,384,895 sharesJul 31, 2026: 1,200,015 sharesAug 14, 2026: 1,147,169 sharesAug 31, 2026: 1,100,992 sharesSep 15, 2026: 1,084,546 sharesSep 30, 2026: 1,510,602 sharesOct 15, 2026: 1,506,469 sharesOct 30, 2026: 1,606,888 shares
Short interest in SSD by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 20261.61M+100.4K+6.7%407.2K3.95
Oct 15, 20261.51M−4.13K−0.3%286.6K5.26
Sep 30, 20261.51M+426.1K+39.3%343.0K4.40
Sep 15, 20261.08M−16.4K−1.5%261.1K4.15
Aug 31, 20261.10M−46.2K−4.0%223.2K4.93
Aug 14, 20261.15M−52.8K−4.4%218.0K5.26
Jul 31, 20261.20M−184.9K−13.4%308.8K3.89
Jul 15, 20261.38M−29.9K−2.1%315.6K4.39
Jun 30, 20261.41M−33.8K−2.3%451.3K3.13
Jun 15, 20261.45M−38.8K−2.6%279.0K5.19
May 29, 20261.49M+127.6K+9.4%278.1K5.35
May 15, 20261.36M+91.1K+7.2%317.5K4.28
Apr 30, 20261.27M+213.5K+20.2%382.0K3.32
Apr 15, 20261.06M−203.2K−16.2%234.2K4.51
Mar 31, 20261.26M−109.3K−8.0%270.1K4.66
Mar 13, 20261.37M+177.4K+14.9%256.0K5.34
Feb 27, 20261.19M−41.5K−3.4%199.2K5.97
Feb 13, 20261.23M+126.4K+11.4%327.1K3.77
Jan 30, 20261.11M−18.9K−1.7%234.2K4.72
Jan 15, 20261.12M+65.6K+6.2%270.3K4.16
Dec 31, 20251.06M−18.2K−1.7%227.0K4.66
Dec 15, 20251.08M−13.2K−1.2%329.6K3.27
Nov 28, 20251.09M−78.2K−6.7%305.3K3.57
Nov 14, 20251.17M−32.9K−2.7%264.8K4.41
Oct 31, 20251.20M+103.4K+9.4%294.1K4.08
Oct 15, 20251.10M+65.7K+6.4%271.8K4.04
Sep 30, 20251.03M−48.9K−4.5%302.1K3.42
Sep 15, 20251.08M−136.1K−11.2%229.7K4.71
Aug 29, 20251.22M−77.9K−6.0%253.3K4.81
Aug 15, 20251.30M−32.0K−2.4%279.2K4.64
Jul 31, 20251.33M−94.3K−6.6%341.3K3.89
Jul 15, 20251.42M+168.1K+13.4%345.7K4.11
Jun 30, 20251.25M−106.9K−7.9%360.1K3.48
Jun 13, 20251.36M+103.9K+8.3%244.4K5.56
May 30, 20251.26M+174.6K+16.1%257.8K4.87
May 15, 20251.08M+79.1K+7.9%234.8K4.61
Apr 30, 20251.00M+49.8K+5.2%215.0K4.66
Apr 15, 2025952.8K+51.1K+5.7%341.5K2.79
Mar 31, 2025901.8K+103.6K+13.0%305.0K2.96
Mar 14, 2025798.2K−23.6K−2.9%215.4K3.70
Feb 28, 2025821.7K+69.4K+9.2%229.5K3.58
Feb 14, 2025752.4K−98.5K−11.6%314.7K2.39
Jan 31, 2025850.9K−80.1K−8.6%237.7K3.58
Jan 15, 2025931.0K+38.0K+4.3%239.5K3.89
Dec 31, 2024893.0K−94.9K−9.6%278.3K3.21
Dec 13, 2024987.9K+146.4K+17.4%209.0K4.73
Nov 29, 2024841.5K−16.1K−1.9%161.1K5.22
Nov 15, 2024857.7K−157.6K−15.5%239.8K3.58
Oct 31, 20241.02M+71.9K+7.6%307.2K3.30

Fails-to-deliver

Shares that weren't delivered by the settlement date, from the SEC, for the last 30 dates with fails. The price is the previous day's closing price published by the SEC.

Fails-to-deliver in SSD by settlement date
Settlement dateSharesPriceValue
Oct 9, 202614$171.95$2.41K
Sep 30, 2026226$173.99$39.3K
Sep 8, 20265$180.97$904.85
Jul 6, 20264,178$200.72$838.6K
Jul 2, 2026217$203.42$44.1K
Jul 1, 2026303$209.35$63.4K
Jun 9, 20262$185.79$371.58
Jun 8, 2026267$185.41$49.5K
May 29, 20261,890$191.21$361.4K
May 28, 20262,145$190.84$409.4K
May 26, 20262$185.01$370.02
May 19, 20266,907$182.00$1.26M
May 18, 202632$178.62$5.72K
May 15, 20263$185.64$556.92
May 13, 20263,179$184.20$585.6K
May 12, 20261,366$185.62$253.6K
May 11, 2026690$188.61$130.1K
Apr 29, 202624,615$191.08$4.70M
Apr 20, 2026206$176.27$36.3K
Apr 8, 202664$166.54$10.7K
Mar 27, 2026576$171.13$98.6K
Mar 23, 20263$167.02$501.06
Mar 19, 20262,099$175.00$367.3K
Mar 16, 20264,136$177.96$736.0K
Mar 6, 20261,355$188.57$255.5K
Mar 2, 202649$193.57$9.48K
Feb 20, 20264$200.21$800.84
Feb 9, 20262,230$194.28$433.2K
Feb 5, 202688$193.35$17.0K
Feb 3, 202647$179.68$8.44K

Daily short volume

Off-exchange short-sale volume, not short interest: shares sold short each day in trades reported to FINRA, for the last 30 trading days.

The short volume ratio isn't a sentiment gauge: market makers sell short to fill buy orders and to hedge, so short sales are usually about half of off-exchange volume.

Off-exchange short volume in SSD by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 10, 202647,82228773,38865.2%
Nov 9, 202643,8136685,70151.1%
Nov 6, 202635,81520078,64545.5%
Nov 5, 2026105,46640148,25471.1%
Nov 4, 202651,379080,10364.1%
Nov 3, 202674,9279104,31971.8%
Nov 2, 202684,0810150,22756.0%
Oct 30, 202662,7620116,77953.7%
Oct 29, 202662,748092,04568.2%
Oct 28, 202676,78315110,44569.5%
Oct 27, 2026138,483162223,71861.9%
Oct 26, 2026172,53321298,49557.8%
Oct 23, 2026148,0430204,74672.3%
Oct 22, 2026116,0290176,90465.6%
Oct 21, 2026137,6563186,77073.7%
Oct 20, 202639,141070,59455.4%
Oct 19, 202675,8530106,27871.4%
Oct 16, 2026101,80330160,15563.6%
Oct 15, 202665,6140110,97259.1%
Oct 14, 202652,12272081,49464.0%
Oct 13, 202662,098210101,81661.0%
Oct 12, 202644,8262370,26363.8%
Oct 9, 202647,8290116,92240.9%
Oct 8, 202664,3379103,83462.0%
Oct 7, 202696,6693163,60759.1%
Oct 6, 202685,08930124,71368.2%
Oct 5, 202661,02520107,60256.7%
Oct 2, 202657,140703101,82356.1%
Oct 1, 202679,8922,561131,18060.9%
Sep 30, 202638,9593388,17644.2%

ATS (dark pool) volume

Weekly volume on alternative trading systems (ATS) and other off-exchange (OTC) venues, from FINRA, for the last 12 weeks. ATS share is ATS volume ÷ (ATS + OTC volume), not a share of all trading.

Weekly ATS and OTC volume in SSD
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 19, 2026T1614,72817,104224,8837,09373.2%
Oct 12, 2026T1399,86417,360164,1395,28970.9%
Oct 5, 2026T1418,03716,551408,8114,79150.6%
Sep 28, 2026T1371,99818,977155,5285,47270.5%
Sep 21, 2026T1514,01718,752112,0595,13482.1%
Sep 14, 2026T1399,37220,866429,9235,81848.2%
Sep 7, 2026T1340,23914,643178,7714,47365.6%
Aug 31, 2026T1307,11216,122118,1585,35972.2%
Aug 24, 2026T1328,97214,771133,4284,55771.1%
Aug 17, 2026T1364,00322,509107,4804,51877.2%
Aug 10, 2026T1238,29316,870199,4653,83354.4%
Aug 3, 2026T1266,45817,481183,6374,68959.2%