Golub Capital BDC, Inc.
US ˙ NasdaqGS ˙ US38173M1027

SecurityGBDC / Golub Capital BDC, Inc.
InstitutionMuzinich & Co., Inc.
Latest Disclosed Ownership1,985,488 shares
Latest Disclosed Value $ 25,136,285
Muzinich & Co., Inc. reports 1.34% increase in ownership of GBDC / Golub Capital BDC, Inc.

On April 23, 2026 - Muzinich & Co., Inc. filed a 13F-HR form disclosing ownership of 1,985,488 shares of Golub Capital BDC, Inc. (US:GBDC) valued at $25,136,278 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 21, 2026 disclosing 1,959,272 shares of Golub Capital BDC, Inc.. This represents a change in shares of 1.34% during the quarter. The current value of the position is $26,188,587 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)
2026-04-23 2026-03-31 13F GOLUB CAP BDC COM 38173M102 1,985,488 26,216 1.34 25,136 -5.46 8.7921
2026-01-21 2025-12-31 13F GOLUB CAP BDC COM 38173M102 1,959,272 333,636 20.52 26,587 19.47 8.3601
2025-10-20 2025-09-30 13F GOLUB CAP BDC COM 38173M102 1,625,636 397,514 32.37 22,255 23.70 8.5994
2025-08-04 2025-06-30 13F GOLUB CAP BDC COM 38173M102 1,228,122 294,335 31.52 17,992 27.26 7.8081
2025-05-05 2025-03-31 13F GOLUB CAP BDC COM 38173M102 933,787 205,422 28.20 14,138 28.03 8.0280
2025-02-05 2024-12-31 13F GOLUB CAP BDC COM 38173M102 728,365 71,724 10.92 11,042 11.30 6.9166
2024-11-06 2024-09-30 13F GOLUB CAP BDC COM 38173M102 656,641 5,264 0.81 9,922 -3.05 7.0010
2024-08-07 2024-06-30 13F GOLUB CAP BDC COM 38173M102 651,377 57,559 9.69 10,233 14.13 7.8191
2024-05-13 2024-03-31 13F GOLUB CAP BDC COM 38173M102 593,818 0 0.00 8,967 0.00 5.9647
2024-02-14 2023-12-31 13F GOLUB CAP BDC COM 38173M102 593,818 -8,537 -1.42 8,967 1.47 5.9647
2023-11-13 2023-09-30 13F GOLUB CAP BDC COM 38173M102 602,355 20,409 3.51 8,837 12.47 6.1323
2023-08-11 2023-06-30 13F GOLUB CAP BDC COM 38173M102 581,946 -18,770 -3.12 7,856 -3.55 5.3474
2023-05-11 2023-03-31 13F GOLUB CAP BDC COM 38173M102 600,716 21,816 3.77 8,146 7.00 5.9199
2023-02-09 2022-12-31 13F GOLUB CAP BDC COM 38173M102 578,900 -33,069 -5.40 7,613 0.40 5.6899
2022-11-14 2022-09-30 13F GOLUB CAP BDC COM 38173M102 611,969 -44,961 -6.84 7,582 -10.95 6.5001
2022-08-12 2022-06-30 13F GOLUB CAP BDC COM 38173M102 656,930 -36,909 -5.32 8,514 -19.27 5.9906
2022-05-13 2022-03-31 13F GOLUB CAP BDC COM 38173M102 693,839 -29,104 -4.03 10,546 -5.40 5.0157
2022-02-11 2021-12-31 13F GOLUB CAP BDC COM 38173M102 722,943 -44,541 -5.80 11,148 -8.13 6.4265
2021-11-12 2021-09-30 13F GOLUB CAP BDC COM 38173M102 767,484 -33,588 -4.19 12,134 -1.65 7.6175
2021-08-13 2021-06-30 13F GOLUB CAP BDC COM 38173M102 801,072 42,581 5.61 12,337 11.32 6.6268
2021-05-14 2021-03-31 13F GOLUB CAP BDC COM 38173M102 758,491 2,646 0.35 11,082 3.69 4.3417
2021-02-16 2020-12-31 13F GOLUB CAP BDC COM 38173M102 755,845 0 0.00 10,688 6.81 4.3970
2020-11-13 2020-09-30 13F GOLUB CAP BDC COM 38173M102 755,845 -186,049 -19.75 10,007 -8.80 4.0357
2020-08-14 2020-06-30 13F GOLUB CAP BDC COM 38173M102 941,894 200,989 27.13 10,973 17.91 3.2978
2020-05-15 2020-03-31 13F/A-1 GOLUB CAP BDC COM 38173M102 740,905 15,028 2.07 9,306 -30.51 4.7355
2020-05-14 2020-03-31 13F GOLUB CAP BDC COM 38173M102 740,905 15,028 9,306 6,710,944.7678
2020-02-13 2019-12-31 13F GOLUB CAP BDC COM 38173M102 725,877 3,066 0.42 13,392 -1.66 4.7168
2019-11-13 2019-09-30 13F GOLUB CAP BDC COM 38173M102 722,811 -32,499 -4.30 13,618 1.18 4.0757
2019-08-13 2019-06-30 13F GOLUB CAP BDC COM 38173M102 755,310 -39,461 -4.97 13,459 -5.29 2.7927
2019-05-14 2019-03-31 13F GOLUB CAP BDC COM 38173M102 794,771 -44,666 -5.32 14,211 2.60 1.1598
2019-02-12 2018-12-31 13F Golub Capital Bdc COM 38173M102 839,437 8,089 0.97 13,851 -11.14 3.9206
2018-11-13 2018-09-30 13F GOLUB CAPITAL BDC COM 38173M102 831,348 -144,121 -14.77 15,588 -12.68 3.7984
2018-08-14 2018-06-30 13F GOLUB CAPITAL BDC COM 38173M102 975,469 -597,906 -38.00 17,851 -36.58 3.6746
2018-05-14 2018-03-31 13F GOLUB CAPITAL BDC COM 38173M102 1,573,375 -569,885 -26.59 28,148 -27.84 4.7296
2018-02-12 2017-12-31 13F GOLUB CAPITAL BDC COM 38173M102 2,143,260 -431,702 -16.77 39,007 -19.51 5.0590
2017-11-14 2017-09-30 13F GOLUB CAPITAL BDC COM 38173M102 2,574,962 -117,298 -4.36 48,461 -5.86 4.7976
2017-08-11 2017-06-30 13F GOLUB CAPITAL BDC COMMON STOCK 38173M102 2,692,260 443,945 19.75 51,476 15.17 4.5015
2017-05-10 2017-03-31 13F GOLUB CAPITAL BDC COMMON STOCK 38173M102 2,248,315 619,422 38.03 44,697 49.21 3.6974
2017-01-05 2016-12-31 13F GOLUB CAPITAL BDC COMMON STOCK 38173M102 1,628,893 514,291 46.14 29,955 44.72 3.9510
2016-10-27 2016-09-30 13F GOLUB CAPITAL BDC COMMON STOCK 38173M102 1,114,602 533,414 91.78 20,698 97.09 5.3238
2016-07-27 2016-06-30 13F GOLUB CAPITAL BDC COMMON STOCK 38173M102 581,188 -16,408 -2.75 10,502 1.53 4.8046
2016-04-13 2016-03-31 13F GOLUB CAPITAL BDC COMMON STOCK 38173M102 597,596 24,392 4.26 10,344 8.52 4.5943
2016-01-19 2015-12-31 13F GOLUB CAPITAL BDC COMMON STOCK 38173M102 573,204 0 0.00 9,532 4.59 4.6745
2015-11-10 2015-09-30 13F/A-1 GOLUB CAPITAL BDC COMMON STOCK 38173M102 573,204 14,873 2.66 9,114 -1.43 4.4978
2015-10-26 2015-09-30 13F GOLUB CAPITAL BDC COMMON STOCK 38173M102 320,245 5,736
2015-07-21 2015-06-30 13F GOLUB CAPITAL BDC COMMON STOCK 38173M102 558,331 122,748 28.18 9,246 20.96 3.9726
2015-04-10 2015-03-31 13F GOLUB CAPITAL BDC COMMON STOCK 38173M102 435,583 435,583 7,644 3.4145
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.