Portfolio Investments

9 Months Ended

Jun. 30, 2026

Schedule of Investments [Abstract]

Portfolio Investments

Portfolio Investments

Portfolio Composition

As of June 30, 2026, the fair value of the Company’s investment portfolio was $6,796.8 million and was composed of investments in 152 portfolio companies, including $13.1 million in limited liability company (“LLC”) equity interests of OSCF EDL JV, LLC (“EDL JV”), a joint venture through which the Company and Pantheon Sapling LP (“Pantheon”) co-invest predominantly in first lien senior secured loans to European borrowers. As of September 30, 2025, the fair value of the Company’s investment portfolio was $6,899.0 million and was composed of investments in 158 portfolio companies.

As of June 30, 2026 and September 30, 2025, the Company’s investment portfolio consisted of the following:

	June 30, 2026				September 30, 2025
Cost:			% of Total Investments				% of Total Investments
Senior Secured Debt	$	6,382,331	92.53	%	$	6,414,699	93.45	%
Subordinated Debt	481,298		6.98	%	423,818		6.17	%
Equity Investment in EDL JV	13,104		0.19	%	—		—	%
Common Equity and Warrants	11,028		0.16	%	11,343		0.17	%
Preferred Equity	9,920		0.14	%	14,080		0.21	%
Total	$	6,897,681	100.00	%	$	6,863,940	100.00	%

	June 30, 2026						September 30, 2025
Fair Value:			% of Total Investments		% of Net Assets				% of Total Investments		% of Net Assets
Senior Secured Debt	$	6,280,474	92.41	%	146.82	%	$	6,438,079	93.32	%	141.75	%
Subordinated Debt	481,229		7.08	%	11.25	%	429,299		6.22	%	9.45	%
Equity Investment in EDL JV	13,148		0.19	%	0.31	%	—		—	%	—	%
Preferred Equity	12,933		0.19	%	0.30	%	18,658		0.27	%	0.41	%
Common Equity and Warrants	9,030		0.13	%	0.21	%	12,995		0.19	%	0.29	%
Total	$	6,796,814	100.00	%	158.89	%	$	6,899,031	100.00	%	151.90	%

The composition of the Company’s debt investments as of June 30, 2026 and September 30, 2025 by floating rates and fixed rates was as follows:

	June 30, 2026				September 30, 2025
	Fair Value		% of Debt Investments		Fair Value		% of Debt Investments
Floating rate	$	6,354,247	93.97	%	$	6,413,837	93.40	%
Fixed rate	407,456		6.03	%	453,541		6.60	%
Total	$	6,761,703	100.00	%	$	6,867,378	100.00	%

The geographic composition of the Company’s portfolio is determined by the location of the corporate headquarters of the portfolio company, which may not be indicative of the primary source of the portfolio company’s business. The following tables show the portfolio composition by geographic region at cost as a percentage of total investments and at fair value as a percentage of total investments and net assets:

	June 30, 2026				September 30, 2025
Cost:			% of Total Investments				% of Total Investments
United States	$	5,920,198	85.83	%	$	5,722,070	83.37	%
Sweden	320,933		4.65	%	306,364		4.46	%
United Kingdom	259,043		3.76	%	403,707		5.88	%
Germany	119,119		1.73	%	176,834		2.58	%
Netherlands	101,319		1.47	%	110,787		1.61	%
Luxembourg	70,913		1.03	%	89,870		1.31	%
Greece	54,772		0.79	%	—		—	%
Mexico	36,033		0.52	%	—		—	%
Switzerland	10,442		0.15	%	10,385		0.15	%
Jamaica	4,757		0.07	%	4,757		0.07	%
Australia	152		0.00	%	1,683		0.02	%
Canada	—		—	%	20,961		0.31	%
Costa Rica	—		—	%	16,522		0.24	%
Total	$	6,897,681	100.00	%	$	6,863,940	100.00	%

	June 30, 2026						September 30, 2025
Fair Value:			% of Total Investments		% of Net Assets				% of Total Investments		% of Net Assets
United States	$	5,816,566	85.58	%	136.00	%	$	5,718,209	82.89	%	125.89	%
Sweden	318,864		4.69	%	7.45	%	313,062		4.54	%	6.89	%
United Kingdom	259,402		3.82	%	6.06	%	414,953		6.01	%	9.14	%
Germany	122,602		1.80	%	2.87	%	185,742		2.69	%	4.09	%
Netherlands	102,307		1.51	%	2.39	%	116,216		1.68	%	2.56	%
Luxembourg	71,609		1.05	%	1.67	%	94,947		1.38	%	2.09	%
Greece	54,103		0.80	%	1.26	%	—		—	%	—	%
Mexico	36,036		0.53	%	0.84	%	—		—	%	—	%
Switzerland	10,352		0.15	%	0.24	%	10,305		0.15	%	0.23	%
Jamaica	4,902		0.07	%	0.11	%	4,894		0.07	%	0.11	%
Australia	71		0.00	%	—	%	1,809		0.03	%	0.04	%
Canada	—		—	%	—	%	22,105		0.32	%	0.49	%
Costa Rica	—		—	%	—	%	16,789		0.24	%	0.37	%
Total	$	6,796,814	100.00	%	158.89	%	$	6,899,031	100.00	%	151.90	%

The composition of the Company’s portfolio by industry at cost as a percentage of total investments and at fair value as a percentage of total investments and net assets as of June 30, 2026 and September 30, 2025 was as follows:

	June 30, 2026				September 30, 2025
Cost:			% of Total Investments				% of Total Investments
Application Software	$	1,028,408	14.93	%	$	1,077,261	15.67	%
Aerospace & Defense	425,384		6.17	%	440,518		6.42	%
Health Care Services	366,193		5.31	%	408,129		5.95	%
Health Care Equipment	356,270		5.17	%	221,030		3.22	%
Pharmaceuticals	281,387		4.08	%	307,950		4.49	%
Diversified Support Services	266,466		3.86	%	269,009		3.92	%
Life Sciences Tools & Services	240,738		3.49	%	311,963		4.54	%
Packaged Foods & Meats	225,178		3.26	%	221,939		3.23	%
Specialized Finance	220,367		3.19	%	242,474		3.53	%
Interactive Media & Services	216,580		3.14	%	259,735		3.78	%
Systems Software	205,874		2.98	%	230,953		3.36	%
Construction & Engineering	183,669		2.66	%	107,579		1.57	%
Diversified Financial Services	175,683		2.55	%	141,952		2.07	%
Building Products	175,177		2.54	%	179,198		2.61	%
Health Care Supplies	173,083		2.51	%	153,582		2.24	%
Specialized Consumer Services	157,092		2.28	%	177,353		2.58	%
Education Services	150,658		2.18	%	159,758		2.33	%
Electrical Components & Equipment	149,237		2.16	%	96,510		1.41	%
Insurance Brokers	140,053		2.03	%	131,423		1.91	%
Alternative Carriers	130,716		1.90	%	45,152		0.66	%
Air Freight & Logistics	128,220		1.86	%	51,249		0.75	%
Cable & Satellite	121,258		1.76	%	67,734		0.99	%
Health Care Technology	103,357		1.50	%	114,695		1.67	%
Passenger Ground Transportation	95,416		1.38	%	—		—	%
Environmental & Facilities Services	87,744		1.27	%	84,561		1.23	%
Construction Machinery & Heavy Transportation Equipment	86,055		1.25	%	84,857		1.24	%
Drug Retail	83,025		1.20	%	84,288		1.23	%
Communications Equipment	76,803		1.11	%	81,615		1.19	%
Distillers & Vintners	71,150		1.03	%	—		—	%
Oil & Gas Exploration & Production	67,839		0.98	%	—		—	%
Real Estate Services	60,348		0.87	%	58,482		0.85	%
Distributors	60,055		0.87	%	56,976		0.83	%
Soft Drinks & Non-alcoholic Beverages	56,062		0.81	%	56,343		0.82	%
Industrial Machinery & Supplies & Components	55,406		0.80	%	58,103		0.85	%
Casinos & Gaming	54,772		0.79	%	—		—	%
Property & Casualty Insurance	47,302		0.69	%	76,662		1.12	%
Office Services & Supplies	42,530		0.62	%	76,041		1.11	%
Advertising	42,458		0.62	%	—		—	%
Research & Consulting Services	38,524		0.56	%	93,967		1.37	%
Multi-Sector Holdings (1)	37,130		0.54	%	84,056		1.22	%
Diversified Chemicals	35,784		0.52	%	44,349		0.65	%
Personal Care Products	35,505		0.51	%	—		—	%
Trading Companies & Distributors	22,663		0.33	%	38,561		0.56	%
Hotels, Resorts & Cruise Lines	21,355		0.31	%	20,535		0.30	%
Wireless Telecommunication Services	20,206		0.29	%	27,550		0.40	%
Consumer Finance	19,825		0.29	%	19,701		0.29	%
Internet Services & Infrastructure	14,435		0.21	%	—		—	%
Biotechnology	10,887		0.16	%	12,361		0.18	%
Health Care Distributors	10,422		0.15	%	10,422		0.15	%
Paper & Plastic Packaging Products & Materials	9,988		0.14	%	37,703		0.55	%
Food Distributors	6,598		0.10	%	35,193		0.51	%
Movies & Entertainment	6,346		0.09	%	45,345		0.66	%
Other Specialty Retail	—		—	%	69,073		1.01	%
Asset Management & Custody Banks	—		—	%	50,745		0.74	%
Financial Exchanges & Data	—		—	%	47,035		0.69	%
Footwear	—		—	%	31,650		0.46	%
Gold	—		—	%	20,961		0.31	%
Specialty Chemicals	—		—	%	17,325		0.25	%
Metal, Glass & Plastic Containers	—		—	%	12,251		0.18	%
Real Estate Development	—		—	%	10,083		0.15	%
Total	$	6,897,681	100.00	%	$	6,863,940	100.00	%

	June 30, 2026						September 30, 2025
Fair Value:			% of Total Investments		% of Net Assets				% of Total Investments		% of Net Assets
Application Software	$	993,874	14.64	%	23.25	%	$	1,075,502	15.57	%	23.69	%
Aerospace & Defense	427,837		6.29	%	10.00	%	442,866		6.42	%	9.75	%
Health Care Services	360,359		5.30	%	8.42	%	406,784		5.90	%	8.96	%
Health Care Equipment	357,830		5.26	%	8.37	%	224,448		3.25	%	4.94	%
Pharmaceuticals	282,609		4.16	%	6.61	%	314,560		4.56	%	6.93	%
Diversified Support Services	261,282		3.84	%	6.11	%	269,835		3.91	%	5.94	%
Life Sciences Tools & Services	237,538		3.49	%	5.55	%	312,748		4.53	%	6.89	%
Specialized Finance	219,559		3.23	%	5.13	%	243,369		3.53	%	5.36	%
Interactive Media & Services	217,084		3.19	%	5.07	%	263,529		3.82	%	5.80	%
Packaged Foods & Meats	211,362		3.11	%	4.94	%	223,605		3.24	%	4.92	%
Systems Software	181,313		2.67	%	4.24	%	231,233		3.35	%	5.09	%
Diversified Financial Services	179,406		2.64	%	4.19	%	148,590		2.15	%	3.27	%
Building Products	173,762		2.56	%	4.06	%	179,114		2.60	%	3.94	%
Construction & Engineering	173,223		2.55	%	4.05	%	101,248		1.47	%	2.23	%
Health Care Supplies	172,195		2.53	%	4.03	%	153,918		2.23	%	3.39	%
Specialized Consumer Services	156,721		2.31	%	3.66	%	177,197		2.57	%	3.90	%
Electrical Components & Equipment	149,601		2.20	%	3.50	%	96,323		1.40	%	2.12	%
Insurance Brokers	140,766		2.07	%	3.29	%	132,313		1.92	%	2.91	%
Education Services	138,854		2.04	%	3.25	%	155,806		2.26	%	3.43	%
Alternative Carriers	131,498		1.93	%	3.07	%	45,601		0.66	%	1.00	%
Air Freight & Logistics	128,135		1.89	%	3.00	%	51,502		0.75	%	1.13	%
Cable & Satellite	122,183		1.80	%	2.86	%	68,135		0.99	%	1.50	%
Health Care Technology	108,615		1.60	%	2.54	%	123,048		1.78	%	2.71	%
Passenger Ground Transportation	95,308		1.40	%	2.23	%	—		—	%	—	%
Construction Machinery & Heavy Transportation Equipment	86,298		1.27	%	2.02	%	85,255		1.24	%	1.88	%
Environmental & Facilities Services	84,376		1.24	%	1.97	%	82,078		1.19	%	1.81	%
Drug Retail	82,973		1.22	%	1.94	%	84,282		1.22	%	1.86	%
Communications Equipment	76,547		1.13	%	1.79	%	81,450		1.18	%	1.79	%
Distillers & Vintners	71,135		1.05	%	1.66	%	—		—	%	—	%
Oil & Gas Exploration & Production	67,836		1.00	%	1.59	%	—		—	%	—	%
Distributors	60,448		0.89	%	1.41	%	57,204		0.83	%	1.26	%
Real Estate Services	59,364		0.87	%	1.39	%	58,656		0.85	%	1.29	%
Soft Drinks & Non-alcoholic Beverages	56,809		0.84	%	1.33	%	56,388		0.82	%	1.24	%
Industrial Machinery & Supplies & Components	55,142		0.81	%	1.29	%	58,068		0.84	%	1.28	%
Casinos & Gaming	54,103		0.80	%	1.26	%	—		—	%	—	%
Property & Casualty Insurance	47,334		0.70	%	1.11	%	77,904		1.13	%	1.72	%
Advertising	42,458		0.62	%	0.99	%	—		—	%	—	%
Office Services & Supplies	41,524		0.61	%	0.97	%	71,936		1.04	%	1.58	%
Diversified Chemicals	39,100		0.58	%	0.91	%	50,531		0.73	%	1.11	%
Research & Consulting Services	38,644		0.57	%	0.90	%	88,990		1.29	%	1.96	%
Multi-Sector Holdings (1)	36,127		0.53	%	0.84	%	86,117		1.25	%	1.90	%
Personal Care Products	35,521		0.52	%	0.83	%	—		—	%	—	%
Trading Companies & Distributors	22,584		0.33	%	0.53	%	38,349		0.56	%	0.84	%
Hotels, Resorts & Cruise Lines	20,172		0.30	%	0.47	%	20,095		0.29	%	0.44	%
Consumer Finance	19,804		0.29	%	0.46	%	19,912		0.29	%	0.44	%
Wireless Telecommunication Services	19,617		0.29	%	0.46	%	27,695		0.40	%	0.61	%
Internet Services & Infrastructure	14,434		0.21	%	0.34	%	—		—	%	—	%
Biotechnology	10,428		0.15	%	0.24	%	12,154		0.18	%	0.27	%
Health Care Distributors	10,205		0.15	%	0.24	%	10,119		0.15	%	0.22	%
Paper & Plastic Packaging Products & Materials	9,606		0.14	%	0.22	%	37,857		0.55	%	0.83	%
Food Distributors	6,948		0.10	%	0.16	%	37,590		0.54	%	0.83	%
Movies & Entertainment	6,363		0.09	%	0.15	%	45,965		0.67	%	1.01	%
Other Specialty Retail	0		—	%	—	%	71,224		1.03	%	1.57	%
Asset Management & Custody Banks	0		—	%	—	%	54,300		0.79	%	1.20	%
Financial Exchanges & Data	0		—	%	—	%	47,723		0.69	%	1.05	%
Footwear	0		—	%	—	%	34,219		0.50	%	0.75	%
Gold	0		—	%	—	%	22,105		0.32	%	0.49	%
Specialty Chemicals	0		—	%	—	%	17,400		0.25	%	0.38	%
Metal, Glass & Plastic Containers	—		—	%	—	%	12,053		0.17	%	0.27	%
Real Estate Development	—		—	%	—	%	10,138		0.15	%	0.22	%
Total	$	6,796,814	100.00	%	158.89	%	$	6,899,031	100.00	%	151.90	%

_________

(1) This industry includes the Company’s investment in EDL JV.

Fair Value Measurements

The following table presents the financial instruments carried at fair value as of June 30, 2026 on the Company’s Consolidated Statements of Assets and Liabilities for each of the three levels of hierarchy established by ASC 820:

	Level 1		Level 2		Level 3		Measured at Net Asset Value (a)		Total
Senior secured debt	$	—	$	681,782	$	5,598,692	$	—	$	6,280,474
Subordinated debt (including CLO notes and credit linked notes)	—		74,258		406,971		—		481,229
Common equity and warrants (including equity interests in EDL JV)	102		—		8,928		13,148		22,178
Preferred equity	—		—		12,933		—		12,933
Total investments at fair value	102		756,040		6,027,524		13,148		6,796,814
Cash equivalents	90,085		—		—		—		90,085
Derivative assets	—		18,216		—		—		18,216
Total assets at fair value	$	90,187	$	774,256	$	6,027,524	$	13,148	$	6,905,115
Derivative liabilities	$	—	$	4,577	$	—	$	—	$	4,577
Total liabilities at fair value	$	—	$	4,577	$	—	$	—	$	4,577

_________

(a) In accordance with ASC 820-10, certain investments that are measured using the net asset value per share (or its equivalent) as a practical expedient for fair value have not been classified in the fair value hierarchy. These investments are generally not redeemable. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the Consolidated Statements of Assets and Liabilities.

The following table presents the financial instruments carried at fair value as of September 30, 2025 on the Company’s Consolidated Statements of Assets and Liabilities for each of the three levels of hierarchy established by ASC 820:

	Level 1		Level 2		Level 3		Total
Senior secured debt	$	—	$	1,418,025	$	5,020,054	$	6,438,079
Subordinated debt (including CLO notes and credit linked notes)	—		164,010		265,289		429,299
Common equity and warrants	33		—		12,962		12,995
Preferred equity	—		—		18,658		18,658
Total investments at fair value	33		1,582,035		5,316,963		6,899,031
Cash equivalents	210,587		—		—		210,587
Derivative assets	—		24,182		—		24,182
Total assets at fair value	$	210,620	$	1,606,217	$	5,316,963	$	7,133,800

When a determination is made to classify a financial instrument within Level 3 of the valuation hierarchy, the determination is based upon the fact that the unobservable factors are significant to the overall fair value measurement. However, Level 3 financial instruments typically have both unobservable or Level 3 components and observable components (i.e. components that are actively quoted and can be validated by external sources). Accordingly, the appreciation (depreciation) in the tables below includes changes in fair value due in part to observable factors that are part of the valuation methodology. Transfers between levels are recognized at the beginning of the reporting period.

The principal values of the credit facilities payable approximate fair value due to their variable interest rates and are included in Level 3 of the hierarchy. The Adviser used market quotes as of the valuation date to estimate the fair value of the Company’s 8.400% notes due 2028, 6.500% notes due 2029 and 6.190% notes due 2030, which are included in Level 2 of the hierarchy.

The following table provides a roll-forward of the changes in fair value from March 31, 2026 to June 30, 2026 for all investments for which the Adviser determined fair value using unobservable (Level 3) factors:

	Senior Secured Debt		Subordinated Debt (including CLO Notes and Credit-Linked Notes)		Preferred Equity		Common Equity and Warrants		Total
Fair value as of March 31, 2026	$	5,431,778	$	365,503	$	13,303	$	10,367	$	5,820,951
Purchases	509,219		71,735		—		—		580,954
Sales and repayments	(340,083)		(33,159)		(838)		(460)		(374,540)
Capitalized PIK interest income	2,014		3,284		51		—		5,349
Accretion of OID	4,297		49		—		—		4,346
Net unrealized appreciation (depreciation)	(10,528)		(523)		509		(526)		(11,068)
Net realized gains (losses)	1,995		82		(92)		(453)		1,532
Fair value as of June 30, 2026	$	5,598,692	$	406,971	$	12,933	$	8,928	$	6,027,524
Net unrealized appreciation (depreciation) relating to Level 3 assets still held at June 30, 2026 and reported within net unrealized appreciation (depreciation) in the Consolidated Statement of Operations for the three months ended June 30, 2026	$	(7,988)	$	(523)	$	419	$	(959)	$	(9,051)

The following table provides a roll-forward of the changes in fair value from March 31, 2025 to June 30, 2025 for all investments for which the Adviser determined fair value using unobservable (Level 3) factors:

	Senior Secured Debt		Subordinated Debt (including CLO Notes and Credit-Linked Notes)		Preferred Equity		Common Equity and Warrants		Total
Fair value as of March 31, 2025	$	3,893,763	$	256,237	$	16,582	$	12,287	$	4,178,869
Purchases	767,295		85,708		162		35		853,200
Sales and repayments	(129,693)		(266)		—		(257)		(130,216)
Transfers in (a)	—		—		603		—		603
Transfers out (a)(b)	(31,820)		—		—		(603)		(32,423)
Capitalized PIK interest income	1,504		783		—		—		2,287
Accretion of OID	3,950		130		—		—		4,080
Net unrealized appreciation (depreciation)	27,382		293		1,384		1,823		30,882
Net realized gains (losses)	3,153		—		—		—		3,153
Fair value as of June 30, 2025	$	4,535,534	$	342,885	$	18,731	$	13,285	$	4,910,435
Net unrealized appreciation (depreciation) relating to Level 3 assets still held at June 30, 2025 and reported within net unrealized appreciation (depreciation) in the Consolidated Statement of Operations for the three months ended June 30, 2025	$	29,553	$	293	$	1,384	$	1,556	$	32,786

__________

(a) There was an investment restructuring during the three months ended June 30, 2025 in which Level 3 common equity was exchanged for Level 3 preferred equity.

(b) There was a transfer out of Level 3 to Level 2 for an investment during the three months ended June 30, 2025 as a result of a change in the number of market quotes available and/or a change in market liquidity.

The following table provides a roll-forward of the changes in fair value from September 30, 2025 to June 30, 2026 for all investments for which the Adviser determined fair value using unobservable (Level 3) factors:

	Senior Secured Debt		Subordinated Debt (including CLO Notes and Credit-Linked Notes)		Preferred Equity		Common Equity and Warrants		Total
Fair value as of September 30, 2025	$	5,020,054	$	265,289	$	18,658	$	12,962	$	5,316,963
Purchases	1,543,243		209,756		—		—		1,752,999
Sales and repayments	(869,460)		(71,865)		(7,225)		(460)		(949,010)
Transfers in (a)	—		—		930		597		1,527
Transfers out (a)(b)	(36,451)		—		—		—		(36,451)
Capitalized PIK interest income	4,329		4,902		370		—		9,601
Accretion of OID	16,983		78		—		—		17,061
Net unrealized appreciation (depreciation)	(71,344)		(1,361)		(1,566)		(3,718)		(77,989)
Net realized gains (losses)	(8,662)		172		1,766		(453)		(7,177)
Fair value as of June 30, 2026	$	5,598,692	$	406,971	$	12,933	$	8,928	$	6,027,524
Net unrealized appreciation (depreciation) relating to Level 3 assets still held at June 30, 2026 and reported within net unrealized appreciation (depreciation) in the Consolidated Statement of Operations for the nine months ended June 30, 2026	$	(71,158)	$	(1,361)	$	(1,566)	$	(3,718)	$	(77,803)

_________

(a) There were investment restructurings during the nine months ended June 30, 2026 in which (1) $0.9 million of Level 3 senior secured debt was exchanged for Level 3 preferred equity and (2) $0.6 million of Level 3 senior secured debt was exchanged for Level 3 common equity.

(b) There were $34.9 million of transfers out of Level 3 to Level 2 for investments during the nine months ended June 30, 2026 as a result of a change in the number of market quotes available and/or a change in market liquidity.

The following table provides a roll-forward of the changes in fair value from September 30, 2024 to June 30, 2025 for all investments for which the Adviser determined fair value using unobservable (Level 3) factors:

	Senior Secured Debt		Subordinated Debt (including CLO Notes and Credit-Linked Notes)		Preferred Equity		Common Equity and Warrants		Total
Fair value as of September 30, 2024	$	2,890,580	$	223,942	$	14,008	$	12,196	$	3,140,726
Purchases	2,074,529		114,790		162		35		2,189,516
Sales and repayments	(439,936)		(557)		—		(257)		(440,750)
Transfers in (a)(b)	36,264		—		1,552		—		37,816
Transfers out (a)(b)	(68,256)		—		—		(603)		(68,859)
Capitalized PIK interest income	5,198		2,240		—		—		7,438
Accretion of OID	15,549		391		—		—		15,940
Net unrealized appreciation (depreciation)	20,035		2,079		3,009		2,003		27,126
Net realized gains (losses)	1,571		—		—		(89)		1,482
Fair value as of June 30, 2025	$	4,535,534	$	342,885	$	18,731	$	13,285	$	4,910,435
Net unrealized appreciation (depreciation) relating to Level 3 assets still held at June 30, 2025 and reported within net unrealized appreciation (depreciation) in the Consolidated Statement of Operations for the nine months ended June 30, 2025	$	26,990	$	2,079	$	3,009	$	2,236	$	34,314

__________

(a) There were transfers into/out of Level 3 from/to Level 2 for certain investments during the nine months ended June 30, 2025 as a result of a change in the number of market quotes available and/or a change in market liquidity.

(b) There were investment restructurings during the nine months ended June 30, 2025 in which Level 3 senior secured debt was exchanged for Level 3 preferred equity.

Significant Unobservable Inputs for Level 3 Investments

The following table provides quantitative information related to the significant unobservable inputs for Level 3 investments, which were carried at fair value as of June 30, 2026:

Asset	Fair Value		Valuation Technique	Unobservable Input	Range				Weighted Average (a)
Senior secured debt	$	5,405,800	Market Yield	Market Yield	(b)	6.0%	-	35.0%	10.1%
	5,404		Enterprise Value	Revenue Multiple	(d)	0.9x	-	1.1x	1.0x
	59,059		Transaction Precedent	Transaction Price	(c)	N/A	-	N/A	N/A
	128,429		Broker Quotations	Broker Quoted Price	(e)	N/A	-	N/A	N/A
Subordinated debt	269,340		Market Yield	Market Yield	(b)	5.0%	-	14.0%	9.3%
	65,884		Enterprise Value	Revenue multiple	(d)(f)	7.9x		8.1x	8.0x
	71,747		Transaction Precedent	Transaction Price	(c)	N/A	-	N/A	N/A
Common equity and warrants & preferred equity	10,290		Enterprise Value	Revenue Multiple	(d)	0.9x	-	8.0x	1.8x
	11,571		Enterprise Value	EBITDA Multiple	(d)	7.5x	-	14.3x	11.0x
Total	$	6,027,524

_____________________

(a) Weighted averages are calculated based on fair value of investments.

(b) Used when a market participant would take into account market yield when pricing the investment.

(c) Used when there is an observable transaction or pending event for the investment.

(d) Used when a market participant would use such multiple when pricing the investment.

(e) The Adviser generally uses prices provided by an independent pricing service which are non-binding indicative prices on or near the

valuation date as the primary basis for the fair value determinations for quoted senior secured debt investments. Since these prices are nonbinding, they may not be indicative of fair value. The Adviser evaluates the quotations provided by pricing vendors and brokers based on available market information, including trading activity of the subject or similar securities, or by performing a comparable security analysis to ensure that fair values are reasonably estimated.

(f) Since September 30, 2025, the valuation technique for two subordinated debt investments changed from Market Yield to Enterprise Value. There have been no other changes in techniques utilized to value Level 3 investments that resulted in a material impact to the financial statements.

The following table provides quantitative information related to the significant unobservable inputs for Level 3 investments, which were carried at fair value as of September 30, 2025:

Asset	Fair Value		Valuation Technique	Unobservable Input	Range				Weighted Average (a)
Senior secured debt	$	4,896,387	Market Yield	Market Yield	(b)	6.0%	-	26.0%	9.3%
	10,924		Enterprise Value	Revenue Multiple	(d)	2.1x	-	2.3x	2.2x
	2,935		Enterprise Value	EBITDA Multiple	(d)	6.3x	-	8.3x	7.3x
	109,808		Transaction Precedent	Transaction Price	(c)	N/A	-	N/A	N/A
Subordinated debt	265,289		Market Yield	Market Yield	(b)	3.0%	-	12.0%	7.1%
Common equity and warrants & preferred equity	14,236		Enterprise Value	Revenue Multiple	(d)	2.2x	-	5.0x	2.6x
	17,384		Enterprise Value	EBITDA Multiple	(d)	6.5x	-	14.3x	12.8x
Total	$	5,316,963

_____________________

(a) Weighted averages are calculated based on fair value of investments.

(b) Used when a market participant would take into account market yield when pricing the investment.

(c) Used when there is an observable transaction or pending event for the investment.

(d) Used when a market participant would use such multiple when pricing the investment.

Under the market yield technique, the significant unobservable input used in the fair value measurement of the Company’s investments in debt securities is the market yield. Increases or decreases in the market yield may result in a lower or higher fair value measurement, respectively.

Under the EV technique, the significant unobservable input used in the fair value measurement of the Company’s investments in debt or equity securities is the earnings before interest, taxes, depreciation and amortization (“EBITDA”), revenue or asset multiple, as applicable. Increases or decreases in the valuation multiples in isolation may result in a higher or lower fair value measurement, respectively.

OSCF EDL JV, LLC

In May 2026, the Company entered into an LLC agreement with Pantheon to form EDL JV. The Company co-invests with Pantheon predominantly in first lien senior secured loans to European borrowers through its investment in EDL JV. EDL JV is managed by an eight-person Board of Directors, four of whom are selected by the Company and four of whom are selected by Pantheon. All portfolio decisions and investment decisions in respect of EDL JV must be approved by a quorum of directors, with approval from at least one director selected by the Company and one director selected by Pantheon required. Since the Company does not have a controlling financial interest in EDL JV, the Company does not consolidate EDL JV.

EDL JV is capitalized pro rata with LLC equity interests as transactions are completed. As of June 30, 2026, the Company and Pantheon owned, in the aggregate, 25% and 75%, respectively, of the LLC equity interests of EDL JV. EDL JV is not an “eligible portfolio company” as defined in section 2(a)(46) of the Investment Company Act.

EDL JV has a revolving credit facility (the “JV Facility”), which permitted up to €125.0 million of borrowings (subject to borrowing base and other limitations) as of June 30, 2026. Borrowings under the JV Facility are secured by all of the assets of OSCF EDL SCSP, a special purpose financing subsidiary of EDL JV. As of June 30, 2026, the revolving period of the JV Facility was scheduled to expire June 24, 2029 and the maturity date was June 24, 2030. As of June 30, 2026, borrowings under the JV Facility accrued interest at a rate which varies depending on the currency of the borrowing and equals either (i) Term SOFR or Daily Simple SONIA plus 1.75% per annum or (ii) EURIBOR or other applicable benchmark plus 1.70% per annum. As of June 30, 2026, €63.0 million of borrowings were outstanding under the JV Facility.

As of June 30, 2026, EDL JV had total assets of €109.5 million. EDL JV’s portfolio primarily consisted of senior secured loans to 15 portfolio companies as of June 30, 2026. As of June 30, 2026, the Company's investment in EDL JV consisted of LLC equity interests of $13.1 million, at fair value.

As of June 30, 2026, the Company and Pantheon had funded approximately €46.0 million to EDL JV, of which €11.5 million was from the Company. As of June 30, 2026, the Company had a commitment to fund LLC equity interests of EDL JV of €41.7 million, of which €30.2 million ($36.1 million) was unfunded.

Below is a summary of EDL JV’s portfolio, followed by a listing of the individual loans in EDL JV’s portfolio, as of June 30, 2026:

	June 30, 2026
Senior secured loans (1)	€108,443
Weighted average interest rate on senior secured loans (2)	7.89%
Number of borrowers in EDL JV	15
Largest exposure to a single borrower (1)	€8,612
Total of five largest loan exposures to borrowers (1)	€42,878

__________

(1) At principal amount.

(2) Computed using the weighted average annual interest rate on accruing senior secured loans at fair value.

EDL JV Portfolio as of June 30, 2026

Portfolio Company	Industry	Type of Investment	Index	Spread	Cash Interest Rate (1)(2)	PIK	Maturity Date	Shares	Principal		Cost		Fair Value (3)		Notes
ACESO Holding 4 S.A.R.L.	Health Care Services	First Lien Term Loan	E+	5.75%	8.25%		9/27/2031		€	890	€	882	€	882	(4)
ACESO Holding 4 S.A.R.L.	Health Care Services	First Lien Term Loan	E+	5.75%	8.25%		9/30/2031		4,161		4,119		4,123		(4)
ACESO Holding 4 S.A.R.L.	Health Care Services	First Lien Term Loan	E+	5.75%	8.25%		9/27/2031		3,561		3,526		3,528		(4)
Aurelia Netherlands B.V.	Interactive Media & Services	First Lien Term Loan	E+	4.75%	6.95%		5/29/2031		8,612		8,461		8,511		(4)
Blue Bidco Ltd	Wireless Telecommunication Services	First Lien Term Loan	SOFR+	5.00%	8.73%		6/14/2032		$	1,796	1,566		1,565		(4)(5)
Blue Bidco Ltd	Wireless Telecommunication Services	First Lien Term Loan	E+	5.00%	7.40%		6/14/2032		€	2,230	2,174		2,174		(4)
Blue Bidco Ltd	Wireless Telecommunication Services	First Lien Term Loan	SOFR+	5.00%	8.66%		6/14/2032		$	656	560		559		(4)
Blue Bidco Ltd	Wireless Telecommunication Services	First Lien Term Loan	SONIA+	5.00%	8.73%		6/14/2032		£	3,379	3,820		3,824		(4)
BOTA BIDCO GMBH	Diversified Chemicals	First Lien Term Loan	E+	4.00%	6.14%		10/31/2029		€	1,663	1,608		1,608		(4)
BOTA BIDCO GMBH	Diversified Chemicals	First Lien Term Loan	E+	4.50%	6.64%		10/31/2030		6,950		6,550		6,550		(4)
Cielo Bidco Limited	Building Products	First Lien Term Loan	E+	4.75%	6.93%		3/31/2032		544		536		536		(4)(5)
Cielo Bidco Limited	Building Products	First Lien Term Loan	SONIA+	4.75%	8.48%		3/31/2032		£	5,672	6,512		6,518		(4)
Cielo Bidco Limited	Building Products	First Lien Term Loan	E+	4.75%	6.93%		3/31/2032		€	1,317	1,304		1,304		(4)
Draken International, LLC	Aerospace & Defense	First Lien Term Loan	SONIA+	5.00%	8.73%		5/19/2032		£	918	1,065		1,066		(4)(5)
Draken International, LLC	Aerospace & Defense	First Lien Term Loan	SOFR+	5.00%	8.64%		5/19/2032		$	1,561	1,358		1,366		(4)
Draken International, LLC	Aerospace & Defense	First Lien Term Loan	SONIA+	5.00%	8.73%		5/19/2032		£	4,913	5,663		5,704		(4)
Empire Bidco AB	Life Sciences Tools & Services	First Lien Term Loan	STIBOR+	5.25%			9/22/2032		—		(29)		(29)		(4)(5)
Empire Bidco AB	Life Sciences Tools & Services	First Lien Term Loan	STIBOR+	5.25%	7.50%		9/22/2032		kr	29,395	2,599		2,609		(4)

Portfolio Company	Industry	Type of Investment	Index	Spread	Cash Interest Rate (1)(2)	PIK	Maturity Date	Shares	Principal		Cost		Fair Value (3)		Notes
Empire Bidco AB	Life Sciences Tools & Services	First Lien Term Loan	SONIA+	5.25%	8.98%		9/22/2032		£	2,279	€	2,596	€	2,599	(4)
Janus Bidco Limited	Application Software	First Lien Term Loan	SONIA+	5.50%			4/25/2031		—		—		—		(4)(5)
Janus Bidco Limited	Application Software	First Lien Term Loan	SOFR+	5.50%	9.14%		4/25/2031		$	7,316	6,405		6,399		(4)
Kairos Intermediateco AB	Health Care Supplies	First Lien Term Loan	E+	4.75%			4/22/2032		—		(2)		(2)		(4)(5)
Kairos Intermediateco AB	Health Care Supplies	First Lien Term Loan	E+	4.75%	7.13%		4/22/2032		€	4,005	3,989		3,975		(4)
Kairos Intermediateco AB	Health Care Supplies	First Lien Term Loan	NIBOR+	4.75%	9.31%		4/22/2032		Nkr	21,102	1,854		1,851		(4)
Kairos Intermediateco AB	Health Care Supplies	First Lien Term Loan	SONIA+	4.75%	8.48%		4/22/2032		£	1,501	1,734		1,730		(4)
North Star Acquisitionco, LLC	Education Services	First Lien Term Loan	SONIA+	4.50%	8.63%		5/29/2030		146		166		166		(4)
North Star Acquisitionco, LLC	Education Services	First Lien Term Loan	SOFR+	4.75%	8.45%		5/29/2030		$	488	419		419		(4)
North Star Acquisitionco, LLC	Education Services	First Lien Term Loan	SOFR+	4.75%	8.45%		5/3/2029		345		296		296		(4)
North Star Acquisitionco, LLC	Education Services	First Lien Revolver	SOFR+	4.75%			4/29/2030		—		(11)		(11)		(4)(5)
North Star Acquisitionco, LLC	Education Services	First Lien Term Loan	SOFR+	4.75%	8.49%		5/3/2029		414		354		354		(4)(5)
North Star Acquisitionco, LLC	Education Services	First Lien Term Loan	NIBOR+	4.50%	9.07%		5/3/2029		Nkr	7,161	619		620		(4)
North Star Acquisitionco, LLC	Education Services	First Lien Term Loan	SOFR+	4.75%	8.45%		5/3/2029		$	2,898	2,486		2,484		(4)
North Star Acquisitionco, LLC	Education Services	First Lien Term Loan	SOFR+	4.75%	8.45%		5/3/2029		3,764		3,229		3,226		(4)
North Star Acquisitionco, LLC	Education Services	First Lien Term Loan	SONIA+	4.50%	8.87%		5/3/2029		£	326	371		372		(4)
Optimizely North America Inc.	Application Software	First Lien Term Loan	SOFR+	5.00%			10/30/2031		—		(32)		(34)		(4)(5)
Optimizely North America Inc.	Application Software	First Lien Term Loan	SOFR+	5.50%	6.64%	2.50%	10/30/2031		$	5,797	4,822		4,806		(4)
Optimizely Sweden Holdings AB	Application Software	First Lien Term Loan	E+	5.75%	5.46%	2.50%	10/30/2031		€	2,070	1,966		1,960		(4)
Optimizely Sweden Holdings AB	Application Software	First Lien Term Loan	SONIA+	6.00%	7.23%	2.50%	10/30/2031		£	690	761		759		(4)
Poseidon Midco AB	Pharmaceuticals	First Lien Term Loan	SOFR+	5.50%	9.23%		9/17/2031		$	1,915	1,665		1,675		(4)(5)
Poseidon Midco AB	Pharmaceuticals	First Lien Term Loan	E+	5.00%	7.61%		9/17/2031		€	1,704	1,664		1,674		(4)(5)
Poseidon Midco AB	Pharmaceuticals	First Lien Term Loan	E+	5.50%	8.11%		9/17/2031		4,216		4,195		4,216		(4)
RWK Midco AB	Life Sciences Tools & Services	First Lien Term Loan	SOFR+	4.75%	8.74%		7/1/2032		$	594	464		465		(4)(5)
RWK Midco AB	Life Sciences Tools & Services	First Lien Term Loan	E+	4.75%	7.04%		7/1/2032		€	1,588	1,557		1,558		(4)
RWK Midco AB	Life Sciences Tools & Services	First Lien Term Loan	SOFR+	4.75%	8.74%		7/1/2032		$	4,863	4,172		4,171		(4)
Sphynx UK Bidco Ltd	Packaged Foods & Meats	First Lien Term Loan	BBSW+	4.25%	8.71%		9/2/2032		A$	2,295	1,355		1,363		(4)
Sphynx UK Bidco Ltd	Packaged Foods & Meats	First Lien Term Loan	E+	4.25%	6.54%		9/2/2032		€	1,270	1,241		1,241		(4)
Sphynx UK Bidco Ltd	Packaged Foods & Meats	First Lien Term Loan	SONIA+	4.25%	8.23%		8/15/2032		£	5,124	5,824		5,830		(4)
Total Portfolio Investments											€	106,433	€	106,560

__________

(1) Represents the interest rate as of June 30, 2026. All interest rates are payable in cash, unless otherwise noted.

(2) The interest rate on the principal balance outstanding for most of the floating rate loans is indexed to the EURIBOR, SOFR, SONIA and/or an alternate base rate (e.g., prime rate), which typically resets semi-annually, quarterly, or monthly at the borrower's option. The borrower may also elect to have multiple interest reset periods for each loan. For each of these loans, the Company has provided the applicable margin over the reference rates based on each respective credit agreement and the cash interest rate as of period end. As of June 30, 2026, the reference rates for the Company's variable rate loans were the 30-day SOFR at 3.63%, the 90-day SOFR at 3.63%, the 180-day SOFR at 3.67%, the SONIA at 3.75%, the 90-day BBSW at 4.46%, the 90-day NIBOR at 4.56%, the 180-day STIBOR at 2.12%, the 30-day EURIBOR at

2.20%, the 90-day EURIBOR at 2.32% and the 180-day EURIBOR at 2.57%. Most loans include an interest floor, which generally ranges from 0% to 1%. SOFR based contracts may include a credit spread adjustment that is charged in addition to the base rate and the stated spread.

(3) Represents the current determination of fair value as of June 30, 2026 utilizing a similar technique as the Company in accordance with ASC 820. However, the determination of such fair value is not included in the valuation process described elsewhere herein.

(4) This investment was held by both the Company and the EDL JV as of June 30, 2026.

(5) Investment had undrawn commitments. Unamortized fees are classified as unearned income which reduces cost basis, which may result in a negative cost basis. A negative fair value may result from the unfunded commitment being valued below par.

Both the cost and fair value of the LLC equity interests in EDL JV held by the Company were $13.1 million as of June 30, 2026. The Company earned zero in dividend income for the period from June 22, 2026 to June 30, 2026 with respect to its investment in EDL JV. The LLC equity interests of EDL JV are generally dividend producing to the extent EDL JV has residual cash to be distributed on a quarterly basis. Below is certain summarized financial information for EDL JV as of June 30, 2026 and for the period from June 22, 2026 to June 30, 2026:

	June 30, 2026
Selected Balance Sheet Information:
Investments at fair value (cost June 30, 2026: €106,433)	€	106,560
Cash and cash equivalents	2,037
Other assets	950
Total assets	€	109,547
Credit facility payable	€	62,976
Other liabilities	565
Total liabilities	€	63,541
Members' equity	46,006
Total liabilities and members' equity	€	109,547

	Period from June 22, 2026 to June 30, 2026
Selected Statements of Operations Information:
Interest income	€	28
Total investment income	28
Credit facility interest expense	9
Other expenses	107
Total expenses (1)	116
Net investment income	(88)
Net unrealized appreciation (depreciation)	105
Realized gain (loss)	(11)
Net income (loss)	€	6

__________

(1) There are no management fees or incentive fees charged at EDL JV.

During the three months ended June 30, 2026, the Company sold $117.9 million of debt investments to EDL JV. $0.3 million of realized gains were recognized by the Company on these transactions.