Bain Capital Specialty Finance, Inc.
US ˙ NYSE ˙ US05684B1070

SecurityBCSF / Bain Capital Specialty Finance, Inc.
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership95,199 shares
Latest Disclosed Value $ 1,180,468
Advisor Group Holdings, Inc. reports 85.20% increase in ownership of BCSF / Bain Capital Specialty Finance, Inc.

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 95,199 shares of Bain Capital Specialty Finance, Inc. (US:BCSF) valued at $1,180,468 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 51,404 shares of Bain Capital Specialty Finance, Inc.. This represents a change in shares of 85.20% during the quarter. The current value of the position is $1,215,691 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 95,199 43,795 85.20 1,180 65.03 0.0010
2026-02-17 2025-12-31 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 51,404 7,622 17.41 715 8.01 0.0010
2025-11-14 2025-09-30 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 43,782 1,019 2.38 663 2.95 0.0009
2025-09-04 2025-06-30 13F/A-1 BAIN CAP SPECIALTY FIN COM STK 05684B107 42,763 -1,963 -4.39 643 -13.34 0.0011
2025-08-13 2025-06-30 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 41,460 -3,266 680 0.0008
2025-05-12 2025-03-31 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 44,726 20,706 86.20 742 76.67 0.0017
2025-06-06 2024-12-31 13F/A-1 BAIN CAP SPECIALTY FIN COM STK 05684B107 24,020 -368,398 -93.88 421 -93.55 0.0009
2025-02-07 2024-12-31 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 25,257 -367,161 420 0.0011
2024-11-13 2024-09-30 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 392,418 -4,719 -1.19 6,514 0.57 0.0147
2024-08-13 2024-06-30 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 397,137 301,459 315.08 6,477 331.80 0.0153
2024-05-10 2024-03-31 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 95,678 58,366 156.43 1,500 166.90 0.0034
2024-02-12 2023-12-31 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 37,312 -18,137 -32.71 562 -33.73 0.0010
2023-11-13 2023-09-30 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 55,449 26,210 89.64 849 114.68 0.0013
2023-08-21 2023-06-30 13F/A-1 BAIN CAP SPECIALTY FIN COM STK 05684B107 29,239 24,895 573.09 395 674.51 0.0007
2023-08-10 2023-06-30 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 29,239 24,895 395 0.0001
2023-05-12 2023-03-31 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 4,344 20 0.46 52 -1.92 0.0001
2023-02-10 2022-12-31 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 4,324 -23,778 -84.61 52 -84.62 0.0001
2022-11-14 2022-09-30 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 28,102 3,468 14.08 338 0.60 0.0008
2022-08-10 2022-06-30 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 24,634 16,202 192.15 336 156.49 0.0007
2022-05-04 2022-03-31 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 8,432 1,099 14.99 131 18.02 0.0003
2022-02-03 2021-12-31 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 7,333 -934 -11.30 111 -9.76 0.0002
2021-11-05 2021-09-30 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 8,267 -600 -6.77 123 -8.89 0.0003
2021-08-02 2021-06-30 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 8,867 2,900 48.60 135 53.41 0.0003
2021-05-13 2021-03-31 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 5,967 -50 -0.83 88 20.55 0.0002
2021-02-10 2020-12-31 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 6,017 -2,250 -27.22 73 -13.10 0.0002
2020-11-12 2020-09-30 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 8,267 -830 -9.12 84 -16.83 0.0003
2020-08-14 2020-06-30 13F BAIN CAP SPECIALTY FIN COM STK 05684B107 9,097 680 8.08 101 31.17 0.0003
2020-05-18 2020-03-31 13F BAIN CAP SPECIALTY FIN COM 05684B107 8,417 8,417 77 0.0003
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.