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Bain Capital Specialty Finance, Inc.

BCSF
Exchange
NYSE
SEC CIK
0001655050

No open-market purchases or sales by Bain Capital Specialty Finance, Inc. insiders were filed in the last 90 days; 128 institutions reported holding it in 13F filings for Q2 2026, worth $459.6M 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
1.20M
Shares, settlement Oct 30, 2026
Change
−168.5K
−12.3% vs. Oct 15, 2026
Days to cover
2.24
Short interest ÷ average daily volume
Average daily volume
536.3K
Shares, as reported by FINRA
Short interest by settlement date
Oct 31, 2024: 254,076 sharesNov 15, 2024: 372,343 sharesNov 29, 2024: 250,207 sharesDec 13, 2024: 289,643 sharesDec 31, 2024: 469,531 sharesJan 15, 2025: 382,418 sharesJan 31, 2025: 320,283 sharesFeb 14, 2025: 371,213 sharesFeb 28, 2025: 364,530 sharesMar 14, 2025: 270,696 sharesMar 31, 2025: 218,647 sharesApr 15, 2025: 314,878 sharesApr 30, 2025: 279,343 sharesMay 15, 2025: 229,852 sharesMay 30, 2025: 240,946 sharesJun 13, 2025: 315,700 sharesJun 30, 2025: 236,782 sharesJul 15, 2025: 238,266 sharesJul 31, 2025: 205,049 sharesAug 15, 2025: 238,719 sharesAug 29, 2025: 218,137 sharesSep 15, 2025: 274,709 sharesSep 30, 2025: 291,181 sharesOct 15, 2025: 443,574 sharesOct 31, 2025: 430,660 sharesNov 14, 2025: 423,690 sharesNov 28, 2025: 445,063 sharesDec 15, 2025: 505,110 sharesDec 31, 2025: 399,940 sharesJan 15, 2026: 332,530 sharesJan 30, 2026: 354,013 sharesFeb 13, 2026: 788,192 sharesFeb 27, 2026: 494,648 sharesMar 13, 2026: 971,577 sharesMar 31, 2026: 967,966 sharesApr 15, 2026: 858,309 sharesApr 30, 2026: 917,964 sharesMay 15, 2026: 1,019,456 sharesMay 29, 2026: 1,100,944 sharesJun 15, 2026: 1,345,534 sharesJun 30, 2026: 1,261,876 sharesJul 15, 2026: 1,210,449 sharesJul 31, 2026: 1,202,091 sharesAug 14, 2026: 1,380,218 sharesAug 31, 2026: 1,499,227 sharesSep 15, 2026: 1,650,718 sharesSep 30, 2026: 1,276,944 sharesOct 15, 2026: 1,368,384 sharesOct 30, 2026: 1,199,837 shares
Short interest in BCSF by settlement date
Settlement dateShort interestChangeChange %Avg. daily volumeDays to cover
Oct 30, 20261.20M−168.5K−12.3%536.3K2.24
Oct 15, 20261.37M+91.4K+7.2%540.5K2.53
Sep 30, 20261.28M−373.8K−22.6%570.0K2.24
Sep 15, 20261.65M+151.5K+10.1%535.1K3.09
Aug 31, 20261.50M+119.0K+8.6%448.7K3.34
Aug 14, 20261.38M+178.1K+14.8%409.5K3.37
Jul 31, 20261.20M−8.36K−0.7%241.0K4.99
Jul 15, 20261.21M−51.4K−4.1%297.5K4.07
Jun 30, 20261.26M−83.7K−6.2%368.8K3.42
Jun 15, 20261.35M+244.6K+22.2%427.0K3.15
May 29, 20261.10M+81.5K+8.0%297.8K3.70
May 15, 20261.02M+101.5K+11.1%375.8K2.71
Apr 30, 2026918.0K+59.7K+7.0%339.4K2.70
Apr 15, 2026858.3K−109.7K−11.3%471.1K1.82
Mar 31, 2026968.0K−3.61K−0.4%506.5K1.91
Mar 13, 2026971.6K+476.9K+96.4%612.7K1.59
Feb 27, 2026494.6K−293.5K−37.2%816.8K1.00
Feb 13, 2026788.2K+434.2K+122.6%671.4K1.17
Jan 30, 2026354.0K+21.5K+6.5%367.8K1.00
Jan 15, 2026332.5K−67.4K−16.9%364.5K1.00
Dec 31, 2025399.9K−105.2K−20.8%534.7K1.00
Dec 15, 2025505.1K+60.0K+13.5%322.5K1.57
Nov 28, 2025445.1K+21.4K+5.0%508.9K1.00
Nov 14, 2025423.7K−6.97K−1.6%349.9K1.21
Oct 31, 2025430.7K−12.9K−2.9%349.8K1.23
Oct 15, 2025443.6K+152.4K+52.3%475.4K1.00
Sep 30, 2025291.2K+16.5K+6.0%422.7K1.00
Sep 15, 2025274.7K+56.6K+25.9%301.9K1.00
Aug 29, 2025218.1K−20.6K−8.6%234.1K1.00
Aug 15, 2025238.7K+33.7K+16.4%266.6K1.00
Jul 31, 2025205.0K−33.2K−13.9%225.3K1.00
Jul 15, 2025238.3K+1.48K+0.6%289.3K1.00
Jun 30, 2025236.8K−78.9K−25.0%334.9K1.00
Jun 13, 2025315.7K+74.8K+31.0%209.9K1.50
May 30, 2025240.9K+11.1K+4.8%203.4K1.18
May 15, 2025229.9K−49.5K−17.7%319.7K1.00
Apr 30, 2025279.3K−35.5K−11.3%229.9K1.21
Apr 15, 2025314.9K+96.2K+44.0%538.6K1.00
Mar 31, 2025218.6K−52.0K−19.2%357.0K1.00
Mar 14, 2025270.7K−93.8K−25.7%560.7K1.00
Feb 28, 2025364.5K−6.68K−1.8%230.5K1.58
Feb 14, 2025371.2K+50.9K+15.9%183.7K2.02
Jan 31, 2025320.3K−62.1K−16.3%226.8K1.41
Jan 15, 2025382.4K−87.1K−18.6%191.7K1.99
Dec 31, 2024469.5K+179.9K+62.1%200.3K2.34
Dec 13, 2024289.6K+39.4K+15.8%193.9K1.49
Nov 29, 2024250.2K−122.1K−32.8%198.9K1.26
Nov 15, 2024372.3K+118.3K+46.6%212.1K1.76
Oct 31, 2024254.1K+24.9K+10.9%136.6K1.86

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 BCSF by settlement date
Settlement dateSharesPriceValue
Oct 13, 20265,328$10.68$56.9K
Oct 8, 2026526$10.67$5.61K
Oct 5, 20264,349$11.05$48.1K
Oct 2, 2026761$11.09$8.44K
Sep 30, 202634,606$11.23$388.6K
Sep 23, 202610,741$11.22$120.5K
Sep 22, 202610,610$11.21$118.9K
Sep 16, 20265,967$11.07$66.1K
Sep 15, 202625,408$11.44$290.7K
Sep 11, 202656,430$11.40$643.3K
Sep 10, 202623,734$11.54$273.9K
Sep 9, 202614,017$11.63$163.0K
Sep 8, 202610,767$11.82$127.3K
Sep 4, 202635$11.87$415.45
Sep 1, 20265,663$12.02$68.1K
Aug 31, 202615,170$11.93$181.0K
Aug 28, 20269,673$11.90$115.1K
Aug 21, 202616,394$12.10$198.4K
Aug 20, 2026324$12.08$3.91K
Aug 19, 20269,912$12.07$119.6K
Aug 18, 202611,614$12.06$140.1K
Aug 12, 202610,993$12.84$141.2K
Aug 6, 20261,608$12.68$20.4K
Aug 4, 20268,668$12.70$110.1K
Jul 31, 20267,837$12.49$97.9K
Jul 24, 202626,084$12.46$325.0K
Jul 23, 202613,297$12.57$167.1K
Jul 16, 20262,096$12.85$26.9K
Jul 15, 20261,448$12.79$18.5K
Jul 13, 20267,682$12.86$98.8K

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 BCSF by trade date
Trade dateShort volumeShort exemptOff-exchange volumeShort volume ratio
Nov 10, 2026104,27250205,73450.7%
Nov 9, 2026241,1700330,29173.0%
Nov 6, 2026111,5521,251216,07051.6%
Nov 5, 2026104,6130153,41268.2%
Nov 4, 202675,954441193,08139.3%
Nov 3, 2026129,2420284,82645.4%
Nov 2, 202673,1730146,63749.9%
Oct 30, 2026121,3522,604306,81139.6%
Oct 29, 202647,44992139,25034.1%
Oct 28, 2026173,0470364,53147.5%
Oct 27, 2026139,4980257,17054.2%
Oct 26, 202671,4401,606120,10459.5%
Oct 23, 202685,0183,400140,01060.7%
Oct 22, 202660,4150151,33739.9%
Oct 21, 2026111,8061,000192,21258.2%
Oct 20, 2026195,5653,560344,17756.8%
Oct 19, 202684,2520164,34451.3%
Oct 16, 202691,186200162,24556.2%
Oct 15, 202694,953457167,69656.6%
Oct 14, 2026128,431600241,24453.2%
Oct 13, 2026125,665200236,98853.0%
Oct 12, 202686,533606197,51843.8%
Oct 9, 202667,1810142,50647.1%
Oct 8, 202664,2901,342105,73160.8%
Oct 7, 2026111,6240202,41055.1%
Oct 6, 202675,9320158,50147.9%
Oct 5, 202692,7180205,38745.1%
Oct 2, 2026116,226219214,68754.1%
Oct 1, 202666,8430156,64342.7%
Sep 30, 2026117,9810190,98961.8%

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 BCSF
Week ofTierATS sharesATS tradesOther OTC sharesOther OTC tradesATS share
Oct 5, 2026T2326,5395,681643,3133,29533.7%
Sep 28, 2026T2471,4677,843625,8643,59643.0%
Sep 21, 2026T2347,5967,252550,5492,95138.7%
Sep 14, 2026T2474,1729,196887,1303,88634.8%
Sep 7, 2026T2371,0567,860744,5092,97233.3%
Aug 31, 2026T2402,9017,926728,6633,03935.6%
Aug 24, 2026T2396,3236,709570,2262,70741.0%
Aug 17, 2026T2405,7158,326705,0543,08936.5%
Aug 10, 2026T2343,7528,907543,7962,93338.7%
Aug 3, 2026T2311,1228,714890,2932,46425.9%
Jul 27, 2026T2208,9006,124269,0302,18543.7%
Jul 20, 2026T2212,7885,499271,6921,75843.9%