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FirstService Corp

FSV
Exchange
Nasdaq
Industry
Real Estate
SEC CIK
0001637810

No open-market purchases or sales by FirstService Corp insiders were filed in the last 90 days; 282 institutions reported holding it in 13F filings for Q2 2026, worth $4.61B in total; no superinvestor holds 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
767.0K
Shares, settlement Oct 30, 2026
Change
+22.4K
+3.0% vs. Oct 15, 2026
Days to cover
4.37
Short interest ÷ average daily volume
Average daily volume
175.5K
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 146,375 sharesNov 15, 2024: 118,801 sharesNov 29, 2024: 147,910 sharesDec 13, 2024: 138,635 sharesDec 31, 2024: 165,044 sharesJan 15, 2025: 167,567 sharesJan 31, 2025: 170,697 sharesFeb 14, 2025: 222,710 sharesFeb 28, 2025: 318,001 sharesMar 14, 2025: 245,463 sharesMar 31, 2025: 312,921 sharesApr 15, 2025: 291,360 sharesApr 30, 2025: 315,594 sharesMay 15, 2025: 304,731 sharesMay 30, 2025: 291,796 sharesJun 13, 2025: 273,848 sharesJun 30, 2025: 244,853 sharesJul 15, 2025: 296,639 sharesJul 31, 2025: 212,142 sharesAug 15, 2025: 228,384 sharesAug 29, 2025: 230,648 sharesSep 15, 2025: 251,242 sharesSep 30, 2025: 298,852 sharesOct 15, 2025: 316,603 sharesOct 31, 2025: 429,141 sharesNov 14, 2025: 522,844 sharesNov 28, 2025: 491,881 sharesDec 15, 2025: 474,519 sharesDec 31, 2025: 516,926 sharesJan 15, 2026: 449,477 sharesJan 30, 2026: 455,531 sharesFeb 13, 2026: 443,137 sharesFeb 27, 2026: 522,204 sharesMar 13, 2026: 462,249 sharesMar 31, 2026: 376,463 sharesApr 15, 2026: 400,496 sharesApr 30, 2026: 449,693 sharesMay 15, 2026: 475,543 sharesMay 29, 2026: 670,127 sharesJun 15, 2026: 849,216 sharesJun 30, 2026: 1,046,520 sharesJul 15, 2026: 1,013,935 sharesJul 31, 2026: 1,331,136 sharesAug 14, 2026: 1,305,516 sharesAug 31, 2026: 1,912,255 sharesSep 15, 2026: 835,655 sharesSep 30, 2026: 865,033 sharesOct 15, 2026: 744,587 sharesOct 30, 2026: 767,033 shares
Short interest in FSV by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 2026767.0K+22.4K+3.0%175.5K4.37
Oct 15, 2026744.6K−120.4K−13.9%99.3K7.50
Sep 30, 2026865.0K+29.4K+3.5%223.4K3.87
Sep 15, 2026835.7K−1.08M−56.3%203.9K4.10
Aug 31, 20261.91M+606.7K+46.5%239.8K7.97
Aug 14, 20261.31M−25.6K−1.9%165.4K7.90
Jul 31, 20261.33M+317.2K+31.3%263.4K5.05
Jul 15, 20261.01M−32.6K−3.1%107.4K9.44
Jun 30, 20261.05M+197.3K+23.2%221.2K4.73
Jun 15, 2026849.2K+179.1K+26.7%247.0K3.44
May 29, 2026670.1K+194.6K+40.9%315.3K2.13
May 15, 2026475.5K+25.9K+5.8%216.6K2.20
Apr 30, 2026449.7K+49.2K+12.3%249.5K1.80
Apr 15, 2026400.5K+24.0K+6.4%126.5K3.17
Mar 31, 2026376.5K−85.8K−18.6%153.2K2.46
Mar 13, 2026462.2K−60.0K−11.5%203.6K2.27
Feb 27, 2026522.2K+79.1K+17.8%192.2K2.72
Feb 13, 2026443.1K−12.4K−2.7%345.5K1.28
Jan 30, 2026455.5K+6.05K+1.4%191.4K2.38
Jan 15, 2026449.5K−67.4K−13.1%201.2K2.23
Dec 31, 2025516.9K+42.4K+8.9%205.9K2.51
Dec 15, 2025474.5K−17.4K−3.5%217.8K2.18
Nov 28, 2025Revised491.9K+24.7K+5.3%185.7K2.65
Nov 14, 2025522.8K+93.7K+21.8%231.2K2.26
Oct 31, 2025429.1K+112.5K+35.6%331.2K1.30
Oct 15, 2025316.6K+17.8K+5.9%113.3K2.79
Sep 30, 2025298.9K+47.6K+19.0%164.1K1.82
Sep 15, 2025251.2K+20.6K+8.9%87.8K2.86
Aug 29, 2025230.6K+2.26K+1.0%78.6K2.93
Aug 15, 2025228.4K+16.2K+7.7%109.6K2.08
Jul 31, 2025212.1K−84.5K−28.5%213.5K1.00
Jul 15, 2025296.6K+51.8K+21.2%106.0K2.80
Jun 30, 2025244.9K−29.0K−10.6%180.1K1.36
Jun 13, 2025273.8K−17.9K−6.2%80.3K3.41
May 30, 2025291.8K−12.9K−4.2%81.0K3.60
May 15, 2025304.7K−10.9K−3.4%104.0K2.93
Apr 30, 2025315.6K+24.2K+8.3%109.0K2.90
Apr 15, 2025291.4K−21.6K−6.9%180.4K1.62
Mar 31, 2025312.9K+67.5K+27.5%214.0K1.46
Mar 14, 2025245.5K−72.5K−22.8%176.7K1.39
Feb 28, 2025318.0K+95.3K+42.8%120.3K2.64
Feb 14, 2025222.7K+52.0K+30.5%147.9K1.51
Jan 31, 2025170.7K+3.13K+1.9%120.5K1.42
Jan 15, 2025167.6K+2.52K+1.5%115.6K1.45
Dec 31, 2024165.0K+26.4K+19.1%108.6K1.52
Dec 13, 2024138.6K−9.28K−6.3%81.5K1.70
Nov 29, 2024147.9K+29.1K+24.5%101.1K1.46
Nov 15, 2024118.8K−27.6K−18.8%85.7K1.39
Oct 31, 2024146.4K−22.9K−13.5%72.8K2.01

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 FSV by settlement date
Settlement dateSharesPriceValue
Oct 14, 202679$130.81$10.3K
Oct 13, 20268$129.58$1.04K
Oct 7, 20261,042$128.81$134.2K
Oct 6, 20261,148$128.28$147.3K
Oct 5, 2026310$129.13$40.0K
Oct 2, 2026346$128.51$44.5K
Oct 1, 2026217$127.88$27.7K
Sep 30, 20261,608$129.20$207.8K
Sep 29, 20265,124$129.02$661.1K
Sep 28, 20262,652$128.62$341.1K
Sep 23, 2026395$133.34$52.7K
Sep 22, 20264,130$132.95$549.1K
Sep 21, 202674$129.11$9.55K
Sep 18, 2026767$132.55$101.7K
Sep 17, 2026743$132.41$98.4K
Sep 15, 202620$135.31$2.71K
Sep 14, 202620$137.78$2.76K
Sep 10, 20261,275$137.87$175.8K
Sep 9, 20263,670$138.86$509.6K
Sep 8, 20265,579$144.11$804.0K
Sep 4, 20265,669$142.91$810.2K
Sep 3, 20263,571$138.10$493.2K
Sep 1, 20262,905$139.34$404.8K
Aug 31, 20268,598$141.54$1.22M
Aug 28, 20261,570$141.09$221.5K
Aug 27, 20268,135$143.50$1.17M
Aug 26, 20265,958$143.94$857.6K
Aug 25, 2026509$143.91$73.3K
Aug 24, 20261,610$144.49$232.6K
Aug 21, 20266,786$143.45$973.5K

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 FSV by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 11, 202639,697752,59475.5%
Nov 10, 202638,101060,02463.5%
Nov 9, 202640,721049,67082.0%
Nov 6, 202633,71315362,59253.9%
Nov 5, 202626,301042,22762.3%
Nov 4, 202638,2832354,58670.1%
Nov 3, 202628,13364339,59371.1%
Nov 2, 202653,6911065,99581.4%
Oct 30, 2026108,3815,923169,26564.0%
Oct 29, 202661,675100106,77457.8%
Oct 28, 202623,518048,10348.9%
Oct 27, 202625,494046,70854.6%
Oct 26, 202637,44322458,73663.7%
Oct 23, 202659,262087,04168.1%
Oct 22, 202648,8411,51771,07068.7%
Oct 21, 202622,159039,69755.8%
Oct 20, 202630,874050,44361.2%
Oct 19, 202619,069035,35953.9%
Oct 16, 202654,176075,35171.9%
Oct 15, 202626,640048,61054.8%
Oct 14, 202619,045029,06765.5%
Oct 13, 202627,232050,64653.8%
Oct 12, 202616,048025,99861.7%
Oct 9, 202613,959023,52959.3%
Oct 8, 202618,359030,86459.5%
Oct 7, 202640,400066,82760.5%
Oct 6, 202619,506039,19449.8%
Oct 5, 202618,825030,67161.4%
Oct 2, 202644,176058,15276.0%
Oct 1, 202623,364056,42841.4%

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 FSV
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T2145,0105,77765,2712,24369.0%
Sep 28, 2026T2202,5737,939239,1502,43045.9%
Sep 21, 2026T2347,25110,459163,2822,48068.0%
Sep 14, 2026T2197,9607,651197,1082,14850.1%
Sep 7, 2026T2189,0436,95457,2071,88776.8%
Aug 31, 2026T2237,6258,962414,3182,06736.4%
Aug 24, 2026T2200,5886,597146,3681,91757.8%
Aug 17, 2026T2256,5129,171113,1702,15369.4%
Aug 10, 2026T2187,2729,264181,6881,92450.8%
Aug 3, 2026T2147,1367,017113,6321,87856.4%
Jul 27, 2026T2335,73310,902332,4922,36350.2%
Jul 20, 2026T2503,29610,724111,2493,08281.9%