Golub Capital BDC, Inc.
US ˙ NasdaqGS ˙ US38173M1027

SecurityGBDC / Golub Capital BDC, Inc.
InstitutionOMERS ADMINISTRATION Corp
Latest Disclosed Ownership3,559,646 shares
Latest Disclosed Value $ 45,065,118
OMERS ADMINISTRATION Corp reports 17.90% increase in ownership of GBDC / Golub Capital BDC, Inc.

On May 15, 2026 - OMERS ADMINISTRATION Corp filed a 13F-HR form disclosing ownership of 3,559,646 shares of Golub Capital BDC, Inc. (US:GBDC) valued at $45,065,118 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 3,019,148 shares of Golub Capital BDC, Inc.. This represents a change in shares of 17.90% during the quarter. The current value of the position is $45,919,433 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 GOLUB CAP BDC COM 38173M102 3,559,646 540,498 17.90 45,065 10.00 0.2898
2026-02-13 2025-12-31 13F GOLUB CAP BDC COM 38173M102 3,019,148 597,918 24.69 40,970 23.60 0.2920
2025-11-14 2025-09-30 13F GOLUB CAP BDC COM 38173M102 2,421,230 67,118 2.85 33,147 -3.89 0.2374
2025-08-13 2025-06-30 13F GOLUB CAP BDC COM 38173M102 2,354,112 60,682 2.65 34,488 -0.68 0.2709
2025-05-14 2025-03-31 13F GOLUB CAP BDC COM 38173M102 2,293,430 57,631 2.58 34,723 2.44 0.3038
2025-02-14 2024-12-31 13F GOLUB CAP BDC COM 38173M102 2,235,799 -982,755 -30.53 33,895 -30.31 0.2964
2024-11-13 2024-09-30 13F GOLUB CAP BDC COM 38173M102 3,218,554 566,197 21.35 48,632 16.71 0.4477
2024-08-13 2024-06-30 13F GOLUB CAP BDC COM 38173M102 2,652,357 -601,103 -18.48 41,669 -22.99 0.4013
2024-05-14 2024-03-31 13F GOLUB CAP BDC COM 38173M102 3,253,460 92,449 2.92 54,105 13.35 0.6189
2024-02-13 2023-12-31 13F GOLUB CAP BDC COM 38173M102 3,161,011 -171,506 -5.15 47,731 -2.37 0.6026
2023-11-13 2023-09-30 13F GOLUB CAP BDC COM 38173M102 3,332,517 -340,690 -9.28 48,888 -1.41 0.7362
2023-08-14 2023-06-30 13F GOLUB CAP BDC COM 38173M102 3,673,207 87,586 2.44 49,588 1.99 0.7715
2023-05-12 2023-03-31 13F GOLUB CAP BDC COM 38173M102 3,585,621 -62,003 -1.70 48,621 1.29 0.7495
2023-02-13 2022-12-31 13F GOLUB CAP BDC COM 38173M102 3,647,624 173,717 5.00 48,003 11.52 0.7687
2022-11-14 2022-09-30 13F GOLUB CAP BDC COM 38173M102 3,473,907 0 0.00 43,042 -4.40 0.7186
2022-08-12 2022-06-30 13F GOLUB CAP BDC COM 38173M102 3,473,907 78,352 2.31 45,022 -12.83 0.6500
2022-05-12 2022-03-31 13F GOLUB CAP BDC COM 38173M102 3,395,555 65,560 1.97 51,646 0.45 0.6627
2022-02-14 2021-12-31 13F GOLUB CAP BDC COM 38173M102 3,329,995 126,186 3.94 51,415 1.51 0.6668
2021-11-12 2021-09-30 13F GOLUB CAP BDC COM 38173M102 3,203,809 0 0.00 50,652 2.53 0.7374
2021-08-13 2021-06-30 13F GOLUB CAP BDC COM 38173M102 3,203,809 61,327 1.95 49,403 7.53 0.7167
2021-05-14 2021-03-31 13F GOLUB CAP BDC COM 38173M102 3,142,482 318,851 11.29 45,943 15.07 0.7278
2021-02-12 2020-12-31 13F GOLUB CAP BDC COM 38173M102 2,823,631 313,768 12.50 39,926 20.15 0.7201
2020-11-12 2020-09-30 13F GOLUB CAP BDC COM 38173M102 2,509,863 59,725 2.44 33,231 16.42 0.7021
2020-08-14 2020-06-30 13F GOLUB CAP BDC COM 38173M102 2,450,138 490,027 25.00 28,544 15.94 0.9473
2020-05-15 2020-03-31 13F GOLUB CAP BDC COM 38173M102 1,960,111 692,161 54.59 24,619 5.21 1.1030
2020-02-14 2019-12-31 13F GOLUB CAP BDC COM 38173M102 1,267,950 513,458 68.05 23,400 64.61 0.2700
2019-11-12 2019-09-30 13F GOLUB CAP BDC COM 38173M102 754,492 14,012 1.89 14,215 6.41 0.1416
2019-08-08 2019-06-30 13F GOLUB CAP BDC COM 38173M102 740,480 13,586 1.87 13,359 -0.81 0.1390
2019-05-15 2019-03-31 13F GOLUB CAP BDC COM 38173M102 726,894 19,336 2.73 13,468 15.43 0.1550
2019-02-14 2018-12-31 13F GOLUB CAP BDC COM 38173M102 707,558 457,242 182.67 11,668 148.63 0.1568
2018-11-14 2018-09-30 13F GOLUB CAP BDC COM 38173M102 250,316 50,316 25.16 4,693 28.22 0.0449
2018-08-09 2018-06-30 13F GOLUB CAP BDC COM 38173M102 200,000 200,000 3,660 0.0338
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.