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Financial Institutions Inc

FISI
Exchange
Nasdaq
Industry
National Commercial Banks
SEC CIK
0000862831

In the last 90 days, Financial Institutions Inc insiders filed 2 open-market purchases and 0 sales; 160 institutions reported holding it in 13F filings for Q2 2026, worth $611.5M in total; no superinvestor holds it.

Other share classesFIISOFIISP

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
689.1K
Shares, settlement Oct 30, 2026
Change
−53.7K
−7.2% vs. Oct 15, 2026
Days to cover
6.43
Short interest ÷ average daily volume
Average daily volume
107.2K
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 63,075 sharesNov 15, 2024: 49,214 sharesNov 29, 2024: 41,503 sharesDec 13, 2024: 123,231 sharesDec 31, 2024: 125,913 sharesJan 15, 2025: 159,645 sharesJan 31, 2025: 312,815 sharesFeb 14, 2025: 376,208 sharesFeb 28, 2025: 371,258 sharesMar 14, 2025: 484,033 sharesMar 31, 2025: 540,483 sharesApr 15, 2025: 326,104 sharesApr 30, 2025: 261,886 sharesMay 15, 2025: 256,420 sharesMay 30, 2025: 253,548 sharesJun 13, 2025: 257,916 sharesJun 30, 2025: 536,165 sharesJul 15, 2025: 491,786 sharesJul 31, 2025: 465,755 sharesAug 15, 2025: 526,379 sharesAug 29, 2025: 430,314 sharesSep 15, 2025: 462,861 sharesSep 30, 2025: 520,667 sharesOct 15, 2025: 563,098 sharesOct 31, 2025: 549,551 sharesNov 14, 2025: 526,137 sharesNov 28, 2025: 515,365 sharesDec 15, 2025: 470,719 sharesDec 31, 2025: 390,306 sharesJan 15, 2026: 441,559 sharesJan 30, 2026: 378,023 sharesFeb 13, 2026: 361,414 sharesFeb 27, 2026: 404,236 sharesMar 13, 2026: 536,799 sharesMar 31, 2026: 563,041 sharesApr 15, 2026: 553,536 sharesApr 30, 2026: 568,160 sharesMay 15, 2026: 571,278 sharesMay 29, 2026: 633,719 sharesJun 15, 2026: 554,102 sharesJun 30, 2026: 498,351 sharesJul 15, 2026: 542,036 sharesJul 31, 2026: 485,305 sharesAug 14, 2026: 508,040 sharesAug 31, 2026: 554,919 sharesSep 15, 2026: 665,389 sharesSep 30, 2026: 795,503 sharesOct 15, 2026: 742,878 sharesOct 30, 2026: 689,137 shares
Short interest in FISI by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 2026689.1K−53.7K−7.2%107.2K6.43
Oct 15, 2026742.9K−52.6K−6.6%102.6K7.24
Sep 30, 2026795.5K+130.1K+19.6%161.1K4.94
Sep 15, 2026665.4K+110.5K+19.9%109.2K6.10
Aug 31, 2026554.9K+46.9K+9.2%163.8K3.39
Aug 14, 2026508.0K+22.7K+4.7%135.5K3.75
Jul 31, 2026485.3K−56.7K−10.5%161.5K3.01
Jul 15, 2026542.0K+43.7K+8.8%141.8K3.82
Jun 30, 2026498.4K−55.8K−10.1%301.0K1.66
Jun 15, 2026554.1K−79.6K−12.6%142.5K3.89
May 29, 2026633.7K+62.4K+10.9%92.2K6.87
May 15, 2026571.3K+3.12K+0.6%84.0K6.80
Apr 30, 2026568.2K+14.6K+2.6%102.9K5.52
Apr 15, 2026553.5K−9.51K−1.7%117.9K4.69
Mar 31, 2026563.0K+26.2K+4.9%136.5K4.13
Mar 13, 2026536.8K+132.6K+32.8%126.9K4.23
Feb 27, 2026404.2K+42.8K+11.9%182.4K2.22
Feb 13, 2026361.4K−16.6K−4.4%240.0K1.51
Jan 30, 2026378.0K−63.5K−14.4%131.3K2.88
Jan 15, 2026441.6K+51.3K+13.1%129.0K3.42
Dec 31, 2025390.3K−80.4K−17.1%150.9K2.59
Dec 15, 2025470.7K−44.6K−8.7%107.4K4.38
Nov 28, 2025515.4K−10.8K−2.1%111.2K4.63
Nov 14, 2025526.1K−23.4K−4.3%105.3K5.00
Oct 31, 2025549.6K−13.5K−2.4%162.8K3.38
Oct 15, 2025563.1K+42.4K+8.2%117.4K4.80
Sep 30, 2025520.7K+57.8K+12.5%147.9K3.52
Sep 15, 2025462.9K+32.5K+7.6%90.3K5.13
Aug 29, 2025430.3K−96.1K−18.3%146.0K2.95
Aug 15, 2025526.4K+60.6K+13.0%123.5K4.26
Jul 31, 2025465.8K−26.0K−5.3%158.6K2.94
Jul 15, 2025491.8K−44.4K−8.3%134.2K3.66
Jun 30, 2025536.2K+278.2K+107.9%228.1K2.35
Jun 13, 2025257.9K+4.37K+1.7%90.1K2.86
May 30, 2025253.5K−2.87K−1.1%82.4K3.08
May 15, 2025256.4K−5.47K−2.1%103.1K2.49
Apr 30, 2025261.9K−64.2K−19.7%164.1K1.60
Apr 15, 2025326.1K−214.4K−39.7%241.8K1.35
Mar 31, 2025540.5K+56.5K+11.7%238.0K2.27
Mar 14, 2025484.0K+112.8K+30.4%208.6K2.32
Feb 28, 2025371.3K−4.95K−1.3%157.7K2.35
Feb 14, 2025376.2K+63.4K+20.3%138.1K2.72
Jan 31, 2025312.8K+153.2K+95.9%179.7K1.74
Jan 15, 2025159.6K+33.7K+26.8%95.7K1.67
Dec 31, 2024125.9K+2.68K+2.2%122.5K1.03
Dec 13, 2024123.2K+81.7K+196.9%168.0K1.00
Nov 29, 202441.5K−7.71K−15.7%59.8K1.00
Nov 15, 202449.2K−13.9K−22.0%51.0K1.00
Oct 31, 202463.1K−5.99K−8.7%32.5K1.94

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 FISI by settlement date
Settlement dateSharesPriceValue
Sep 21, 202692$40.64$3.74K
Sep 9, 20261,512$41.16$62.2K
Aug 31, 202634$40.96$1.39K
Aug 21, 202683$40.79$3.39K
Jul 27, 2026166$40.62$6.74K
Jul 2, 20269,914$40.07$397.3K
Jun 30, 20262,394$38.83$93.0K
Jun 26, 202653$38.70$2.05K
Jun 15, 202665$37.90$2.46K
Jun 2, 2026140$35.73$5.00K
May 6, 202647$34.82$1.64K
Apr 20, 2026183$35.13$6.43K
Apr 15, 2026317$34.34$10.9K
Apr 14, 2026500$33.85$16.9K
Apr 10, 202669$34.39$2.37K
Feb 13, 2026320$34.07$10.9K
Feb 9, 202631$35.14$1.09K
Jan 23, 202693$33.17$3.08K
Jan 21, 2026146$31.58$4.61K
Jan 20, 202634$32.19$1.09K
Jan 8, 20262,900$31.33$90.9K
Dec 1, 202523$30.60$703.8
Oct 20, 2025629$25.72$16.2K
Oct 14, 2025898$26.67$23.9K
Sep 19, 20251$27.45$27.45
Aug 25, 2025500$27.20$13.6K
Jul 15, 2025293$27.59$8.08K
Jun 24, 20251,194$25.33$30.2K
Jun 11, 202550$26.38$1.32K
Jun 9, 2025276$25.80$7.12K

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 FISI by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 10, 202622,045053,44341.2%
Nov 9, 202619,918033,19060.0%
Nov 6, 202615,983023,32668.5%
Nov 5, 202615,527025,38561.2%
Nov 4, 202623,58341136,62564.4%
Nov 3, 202634,829073,20747.6%
Nov 2, 202627,084038,07071.1%
Oct 30, 202650,618069,36573.0%
Oct 29, 202615,24624329,47151.7%
Oct 28, 202618,060029,46661.3%
Oct 27, 202613,902021,18365.6%
Oct 26, 202615,409025,89259.5%
Oct 23, 202617,386023,94272.6%
Oct 22, 202618,033028,18064.0%
Oct 21, 20269,74074517,95654.2%
Oct 20, 202612,970020,35863.7%
Oct 19, 202614,666024,67959.4%
Oct 16, 202618,915032,14758.8%
Oct 15, 202616,101024,13466.7%
Oct 14, 202616,823027,21661.8%
Oct 13, 202614,564026,14655.7%
Oct 12, 202611,841017,86566.3%
Oct 9, 202614,726021,37168.9%
Oct 8, 202616,272023,72368.6%
Oct 7, 202612,602031,38340.2%
Oct 6, 202611,530023,40849.3%
Oct 5, 202623,297535,83665.0%
Oct 2, 202621,4954328,60075.2%
Oct 1, 202619,868036,92453.8%
Sep 30, 202614,165029,51648.0%

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 FISI
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T2105,5996,92538,4311,24473.3%
Sep 28, 2026T2116,3796,44950,9321,39969.6%
Sep 21, 2026T2145,8706,38843,3921,38477.1%
Sep 14, 2026T2154,6798,499240,2971,74739.2%
Sep 7, 2026T294,6486,48135,5171,22772.7%
Aug 31, 2026T2108,7825,87151,2531,64668.0%
Aug 24, 2026T2142,4735,91940,4161,54177.9%
Aug 17, 2026T2170,4896,70760,3151,15673.9%
Aug 10, 2026T294,8844,77742,5751,10269.0%
Aug 3, 2026T2197,4377,97772,7031,43773.1%
Jul 27, 2026T2219,7747,68361,1681,36878.2%
Jul 20, 2026T2194,7147,16571,8451,42173.0%