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Investments
 6 Months Ended
Jun. 30, 2025
Schedule of Investments [Abstract]  
Investments Investments
Control and Affiliate Investments
As required by the 1940 Act, the Company classifies its investments by level of control. “Control investments” are defined in the 1940 Act as investments in those companies that the Company is deemed to “control”. Under the 1940 Act, the Company is generally deemed to “control” a company in which it has invested if it owns 25% or more of the voting securities of such company or has greater than 50% representation on its board. “Affiliate investments” are investments in those companies that are “affiliated companies” of the Company, as defined in the 1940 Act, which are not control investments. The Company is deemed to be an “affiliate” of a company in which it has invested if it owns 5% or more, but generally less than 25%, of the voting securities of such company. “Non-control/non-affiliate investments” are investments that are neither control investments nor affiliate investments. For purposes of determining the classification of its investments, the Company has included consideration of any voting securities or board appointment rights held by the Adviser Funds.
The following table summarizes the Company’s realized gains and losses and changes in unrealized appreciation and depreciation on control and affiliate investments for the three and six months ended June 30, 2025 and 2024.
(in thousands)Three Months Ended June 30, 2025Six Months Ended June 30, 2025
Portfolio Company(1)
TypeFair Value as of June 30, 2025Interest & Dividend Income Fee IncomeNet Change in Unrealized Appreciation (Depreciation) Realized Gain (Loss)Interest & Dividend IncomeFee IncomeNet Change in Unrealized Appreciation (Depreciation) Realized Gain (Loss)
Control Investments
Coronado Aesthetics, LLCControl$313 $— $— $267 $— $— $— $244 $— 
Gibraltar Acquisition LLC(2)
Control60,343 1,096 41 1,444 — 2,663 80 504 — 
Hercules Adviser LLC(3)
Control44,222 2,100 — (795)— 4,000 — 2,032 — 
Tectura CorporationControl10,018 172 — (1,752)— 342 — (1,639)— 
Total Control Investments$114,896 $3,368 $41 $(836)$— $7,005 $80 $1,141 $— 
(in thousands)Three Months Ended June 30, 2024Six Months Ended June 30, 2024
Portfolio Company(1)
TypeFair Value as of June 30, 2024Interest & Dividend IncomeFee IncomeNet Change in Unrealized Appreciation (Depreciation)Realized Gain (Loss)Interest & Dividend IncomeFee IncomeNet Change in Unrealized Appreciation (Depreciation)Realized Gain (Loss)
Control Investments
Coronado Aesthetics, LLCControl$186 $— $— $(97)$— $— $— $(76)$— 
Gibraltar Acquisition, LLC(2)
Control56,811 1,534 36 (1,670)— 2,567 72 (6,291)— 
Hercules Adviser LLC(3)
Control42,728 1,751 — 844 — 3,503 — 2,015 — 
Tectura CorporationControl11,534 172 — (583)— 344 — 17 — 
Total Control Investments$111,259 $3,457 $36 $(1,506)$— $6,414 $72 $(4,335)$— 
(1)In accordance with Rules 3-09, 4-08(g), and Rule 10-01(b)(1) of Regulation S-X, (“Rule 3-09”, “Rule 4-08(g)”, and “Rule 10-01(b)(1)”, respectively), the Company must determine if its unconsolidated subsidiaries are considered “significant subsidiaries”. As of June 30, 2025 and June 30, 2024, there were no unconsolidated subsidiaries that are considered “significant subsidiaries”.
(2)Gibraltar Acquisition LLC is a wholly-owned subsidiary, which is the holding company for their wholly-owned affiliated portfolio companies, Gibraltar Business Capital, LLC and Gibraltar Equipment Finance, LLC. The subsidiary has no significant assets or liabilities, other than their equity and debt investments and equity interest in Gibraltar Business Capital, LLC and Gibraltar Equipment Finance, LLC, respectively.
(3)Hercules Adviser LLC is owned by Hercules Capital Management LLC and presented with Hercules Partner Holdings, LLC which are both wholly owned by the Company. Please refer to “Note 1 - Description of Business” for additional disclosure.
Portfolio Composition
The following table shows the fair value of the Company’s portfolio of investments by asset class as of June 30, 2025 and December 31, 2024:
(in thousands)June 30, 2025December 31, 2024
Investments at
Fair Value		Percentage of
Total Portfolio		Investments at
Fair Value		Percentage of
Total Portfolio
Senior Secured Debt$3,912,165 93.7%$3,419,044 93.4%
Unsecured Debt66,530 1.6%75,557 2.1%
Preferred Stock54,649 1.3%53,802 1.5%
Common Stock101,102 2.4%74,855 2.0%
Warrants35,547 0.8%30,500 0.8%
Investment Funds & Vehicles6,493 0.2%6,220 0.2%
Total$4,176,486 100.0%$3,659,978 100.0%
A summary of the Company’s investment portfolio, at value, by geographic location as of June 30, 2025 and December 31, 2024 is shown as follows:
(in thousands)June 30, 2025December 31, 2024
Investments at
Fair Value		Percentage of
Total Portfolio		Investments at
Fair Value		Percentage of
Total Portfolio
United States$3,759,076 90.0%$3,288,737 89.9%
United Kingdom131,617 3.2%142,183 3.9%
Netherlands124,548 3.0%59,157 1.6%
Germany49,771 1.2%49,255 1.3%
Israel44,767 1.1%88,066 2.4%
Switzerland34,255 0.8%— 0.0%
Canada16,321 0.4%16,251 0.4%
Denmark9,231 0.2%9,284 0.3%
Ireland4,622 0.1%4,649 0.1%
Singapore1,915 0.0%1,996 0.1%
Other363 0.0%400 0.0%
Total$4,176,486 100.0%$3,659,978 100.0 %
The following table shows the fair value of the Company’s portfolio by industry sector as of June 30, 2025 and December 31, 2024:
(in thousands)June 30, 2025December 31, 2024
Investments at
Fair Value		Percentage of
Total Portfolio 		Investments at
Fair Value		Percentage of
Total Portfolio
Software$1,471,080 35.2%$1,081,100 29.5%
Drug Discovery & Development1,035,769 24.8%1,080,390 29.5%
Healthcare Services, Other755,202 18.1%610,184 16.7%
Consumer & Business Services375,233 9.0%372,641 10.2%
Defense Technologies139,991 3.4%— 0.0%
Diversified Financial Services118,110 2.8%113,491 3.1%
Medical Devices & Equipment75,436 1.8%74,962 2.0%
Electronics & Computer Hardware50,666 1.2%162,888 4.5%
Biotechnology Tools34,836 0.8%35,434 1.0%
Communications & Networking27,937 0.7%27,700 0.8%
Information Services24,233 0.6%24,356 0.7%
Sustainable and Renewable Technology22,723 0.5%27,696 0.8%
Manufacturing Technology20,650 0.5%1,162 0.0%
Space Technologies15,446 0.4%45,700 1.2%
Consumer & Business Products8,663 0.2%1,497 0.0%
Semiconductors345 0.0%704 0.0%
Media/Content/Info157 0.0%63 0.0%
Drug Delivery9 0.0%10 0.0%
Total$4,176,486 100.0%$3,659,978 100.0%
No single portfolio investment represents more than 10% of the fair value of the Company’s total investments as of June 30, 2025 or December 31, 2024.
Concentrations of Credit Risk
The Company’s customers are primarily privately held companies and public companies which are active in the “Software”, “Drug Discovery & Development”, “Healthcare Services, Other”, and “Consumer & Business Services” sectors. These sectors are characterized by high margins, high growth rates, consolidation and product and market extension opportunities. Value for companies in these sectors is often vested in intangible assets and intellectual property.
Industry and sector concentrations vary as new loans are recorded and loans are paid off. Investment income, consisting of interest, fees, and recognition of gains on equity and warrant or other equity interests, can fluctuate materially when a loan is paid off or a related warrant or equity interest is sold. Investment income recognized in any given year can be highly concentrated among several portfolio companies.
As of June 30, 2025 and December 31, 2024, the Company’s ten largest portfolio companies represented approximately 28.6% and 31.6%, respectively, of the total fair value of the Company’s investments in portfolio companies. As of June 30, 2025 and December 31, 2024, the Company had six and six portfolio companies, respectively, that represented 5% or more of the Company’s net assets. As of June 30, 2025, the Company had four equity investments representing 58.1% of the total fair value of the Company's equity investments, and each represented 5% or more of the total fair value of the Company’s equity investments. As of December 31, 2024, the Company had three equity investments which represented approximately 49.7% of the total fair value of the Company’s equity investments, and each represented 5% or more of the total fair value of the Company’s equity investments.
Investment Collateral
In the majority of cases, the Company collateralizes its investments by obtaining a first priority security interest in a portfolio company’s assets, which may include its intellectual property. In other cases, the Company may obtain a negative
pledge covering a company’s intellectual property. The Company's investments were collateralized as follows as of June 30, 2025 and December 31, 2024:
Percentage of debt investments (at fair value), as of
June 30, 2025December 31, 2024
Senior Secured First Lien
All assets including intellectual property69.6 %67.1 %
All assets with negative pledge on intellectual property13.5 %14.2 %
“Last-out” with security interest in all of the assets7.9 %9.7 %
Total senior secured first lien position91.0 %91.0 %
Second lien7.3 %6.8 %
Unsecured1.7 %2.2 %
Total debt investments at fair value100.0 %100.0 %
Derivative Instruments
The Company enters into forward currency contracts from time to time to help mitigate the impact that an adverse change in foreign exchange rates would have on the value of the Company’s investments denominated in foreign currencies. The following is a summary of the fair value and location of the Company’s derivative instruments in the Consolidated Statements of Assets and Liabilities held as of June 30, 2025 and December 31, 2024:
(in thousands)Fair Value
Derivative InstrumentStatement LocationJune 30, 2025December 31, 2024
Foreign currency forward contractOther assets$— $538 
Foreign currency forward contractAccounts payable and accrued liabilities507 — 
Total$507 $538 
Net realized and unrealized gains and losses on derivative instruments recorded by the Company during the three and six months ended June 30, 2025 and 2024 are in the following locations in the Consolidated Statements of Operations:
(in thousands) Three Months Ended June 30,Six Months Ended June 30,
Derivative InstrumentStatement Location2025202420252024
Foreign currency forward contractNet realized gain (loss) - Non-control / Non-affiliate investments$(1,551)$(849)$(1,551)$(849)
Foreign currency forward contractNet change in unrealized appreciation (depreciation) - Non-control / Non-affiliate investments(205)725 (1,045)954 
 Total$(1,756)$(124)$(2,596)$105 
Investment Income
The Company’s investment portfolio generates interest, fee, and dividend income. The composition of the Company’s interest income and fee income is as follows:
(in thousands)Three Months Ended June 30,Six Months Ended June 30,
 2025202420252024
Contractual interest income$95,421 $87,439 $183,238 $178,153 
Exit fee interest income14,790 10,592 25,018 22,472 
PIK interest income13,635 15,267 27,108 25,164 
Dividend income2,100 2,100 4,500 3,700 
Other investment income(1)
3,625 2,131 5,279 3,819 
Total interest and dividend income$129,571 $117,529 $245,143 $233,308 
Recurring fee income$2,754 $2,203 $5,434 $4,658 
Fee income - expired commitments715 730 1,032 1,377 
Accelerated fee income - early repayments4,419 4,544 5,361 7,216 
Total fee income$7,888 $7,477 $11,827 $13,251 
(1)Other investment income includes OID interest income and interest recorded on other assets.
As of June 30, 2025 and December 31, 2024, unamortized capitalized fee income was recorded as follows:
(in millions)June 30,
2025		December 31,
2024
Offset against debt investment cost$39.7 $36.9 
Deferred obligation contingent on funding or other milestone9.9 9.1 
Total Unamortized Fee Income$49.6 $46.0 
As of June 30, 2025 and December 31, 2024, loan exit fees receivable were recorded as follows:
(in millions)June 30,
2025		December 31,
2024
Included within debt investment cost$42.2 $39.2 
Deferred receivable related to expired commitments2.4 3.0 
Total Exit Fees Receivable$44.6 $42.2