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| ​ | Maryland (State of incorporation)                                                   | ​ | ​ | 47-5049745 (I.R.S. Employer Identification No.) | ​ |
|---------|-------------------------------------------------------------------------------------|---------|---------|-------------------------------------------------|---------|
| ​ | 205 N. Michigan Ave., Suite 4200Chicago, IL(Address of principal executive offices) | ​ | ​ | 60601 (Zip Code)                                | ​ |
| ​ | Title of each class | ​ | ​ | Trading Symbol(s) | ​ | ​ | Name of each exchange on which registered | ​ |
|---------|---------------------|---------|---------|-------------------|---------|---------|-------------------------------------------|---------|
| ​ | None                | ​ | ​ | N/A               | ​ | ​ | N/A                                       | ​ |
| ​ | Large accelerated filer ☐ | ​ | ​ | Accelerated filer ☐         | ​ |
|---------|---------------------------------|---------|---------|-----------------------------------|---------|
| ​ | Non-accelerated filer ☒   | ​ | ​ | Smaller reporting company ☐ | ​ |
| ​ | Emerging growth company ☒ | ​ | ​ | ​                           | ​ |

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| ​                                                                                                                                | ​ | ​ |  PAGE  | ​ |
|----------------------------------------------------------------------------------------------------------------------------------------|---------|---------|--------------------|---------|
| PART I.                                                                                                                                | ​ | ​ | ​            | ​ | ​ | ​ | ​ |
| Item 1.Business ​                                                                                                           | ​ | ​ | ​            | ​ | 1 | ​ | ​ |
| Item 1A.Risk Factors ​                                                                                                      | ​ | ​ | ​            | ​ | 22 | ​ | ​ |
| Item 1B.Unresolved Staff Comments ​                                                                                         | ​ | ​ | ​            | ​ | 49 | ​ | ​ |
| Item 2.Properties ​                                                                                                         | ​ | ​ | ​            | ​ | 49 | ​ | ​ |
| Item 3.Legal Proceedings ​                                                                                                  | ​ | ​ | ​            | ​ | 49 | ​ | ​ |
| Item 4.Mine Safety Disclosures ​                                                                                            | ​ | ​ | ​            | ​ | 49 | ​ | ​ |
| PART II.                                                                                                                               | ​ | ​ | ​            | ​ | ​ | ​ | ​ |
| Item 5.Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities ​ | ​ | ​ | ​            | ​ | 50 | ​ | ​ |
| Item 6.Selected Financial Data ​                                                                                            | ​ | ​ | ​            | ​ | 52 | ​ | ​ |
| Item 7.Management’s Discussion and Analysis of Financial Condition and Results of Operations ​                        | ​ | ​ | ​            | ​ | 54 | ​ | ​ |
| Item 7A.Quantitative and Qualitative Disclosures About Market Risk ​                                                        | ​ | ​ | ​            | ​ | 71 | ​ | ​ |
| Item 8.Financial Statements and Supplementary Data ​                                                                        | ​ | ​ | ​            | ​ | 73 | ​ | ​ |
| Item 9.Changes in and Disagreements with Accountants on Accounting and Financial Disclosure ​                               | ​ | ​ | ​            | ​ | 117 | ​ | ​ |
| Item 9A.Controls and Procedures ​                                                                                           | ​ | ​ | ​            | ​ | 117 | ​ | ​ |
| Item 9B.Other Information ​                                                                                                 | ​ | ​ | ​            | ​ | 117 | ​ | ​ |
| PART III.                                                                                                                              | ​ | ​ | ​            | ​ | ​ | ​ | ​ |
| Item 10.Directors, Executive Officers and Corporate Governance ​                                                            | ​ | ​ | ​            | ​ | 118 | ​ | ​ |
| Item 11.Executive Compensation ​                                                                                            | ​ | ​ | ​            | ​ | 118 | ​ | ​ |
| Item 12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters ​                    | ​ | ​ | ​            | ​ | 118 | ​ | ​ |
| Item 13.Certain Relationships and Related Transactions, and Director Independence ​                                         | ​ | ​ | ​            | ​ | 118 | ​ | ​ |
| Item 14.Principal Accounting Fees and Services ​                                                                            | ​ | ​ | ​            | ​ | 118 | ​ | ​ |
| PART IV.                                                                                                                               | ​ | ​ | ​            | ​ | ​ | ​ | ​ |
| Item 15.Exhibits and Financial Statement Schedules ​                                                                        | ​ | ​ | ​            | ​ | 119 | ​ | ​ |
| Signatures                                                                                                                             | ​ | ​ | ​            | ​ | 121 | ​ | ​ |

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| ​                                                                    | ​ | ​ | Year endedDecember 31,2019 | ​ | ​     | Year endedDecember 31,2018 | ​ | ​ | Year endedDecember 31,2017 | ​ |
|----------------------------------------------------------------------------|---------|---------|---------------------------------|---------|-------------|---------------------------------|---------|---------|---------------------------------|---------|
| Income Statement Data:                                                     | ​ | ​ | ​                         | ​ | ​     | ​                         | ​ | ​ | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Total Investment Income                                                    | ​ | ​ | ​                         | $       | 55,139,136  | ​                         | ​ | ​ | ​                         | $       | 20,756,054 | ​ | ​ | ​ | ​ | $ | 3,189,839 | ​ | ​ |
| Total Operating Expenses                                                   | ​ | ​ | ​                         | ​ | 18,685,305  | ​                         | ​ | ​ | ​                         | ​ | 9,049,637 | ​ | ​ | ​ | ​ | ​ | 5,031,385 | ​ | ​ |
| Net Investment Income (Loss)                                               | ​ | ​ | ​                         | ​ | 36,453,831  | ​                         | ​ | ​ | ​                         | ​ | 11,706,417 | ​ | ​ | ​ | ​ | ​ | (1,841,546) | ​ | ​ |
| Net realized gain on investments                                           | ​ | ​ | ​                         | ​ | 609,031     | ​                         | ​ | ​ | ​                         | ​ | 59,792 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Net change in unrealized appreciation (depreciation) on investments        | ​ | ​ | ​                         | ​ | (9,416,462) | ​                         | ​ | ​ | ​                         | ​ | (8,693) | ​ | ​ | ​ | ​ | ​ | 405,251 | ​ | ​ |
| Net Increase (Decrease) in Net Assets Resulting from Operations            | ​ | ​ | ​                         | $       | 27,646,400  | ​                         | ​ | ​ | ​                         | $       | 11,757,516 | ​ | ​ | ​ | ​ | $ | (1,436,295) | ​ | ​ |
| Per Share Data:                                                            | ​ | ​ | ​                         | ​ | ​     | ​                         | ​ | ​ | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Net Investment Income (Loss)(1)                                            | ​ | ​ | ​                         | ​ | 1.95        | ​                         | ​ | ​ | ​                         | ​ | 1.26 | ​ | ​ | ​ | ​ | ​ | (0.66) | ​ | ​ |
| Net Increase (Decrease) in Net Assets Resulting from Operations﻿(1) | ​ | ​ | ​                         | ​ | 1.48        | ​                         | ​ | ​ | ​                         | ​ | 1.26 | ​ | ​ | ​ | ​ | ​ | (0.51) | ​ | ​ |

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| ​                                               | ​ | ​ | Year endedDecember 31,2019 | ​ | ​     | Year endedDecember 31,2018 | ​ |
|-------------------------------------------------------|---------|---------|---------------------------------|---------|-------------|---------------------------------|---------|
| Balance Sheet Data:                                   | ​ | ​ | ​                         | ​ | ​     | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Non-control/non-affiliate investments at fair value   | ​ | ​ | ​                         | $       | 368,016,276 | ​                         | ​ | ​ | ​ | $ | 224,248,389 | ​ | ​ |
| Investment in U.S. Treasury Bills at fair value       | ​ | ​ | ​                         | ​ | 99,965,423  | ​                         | ​ | ​ | ​ | ​ | 79,959,928 | ​ | ​ |
| Cash                                                  | ​ | ​ | ​                         | ​ | 45,799,672  | ​                         | ​ | ​ | ​ | ​ | 2,527,474 | ​ | ​ |
| Deferred offering costs                               | ​ | ​ | ​                         | ​ | —     | ​                         | ​ | ​ | ​ | ​ | 102,865 | ​ | ​ |
| Accrued interest receivable                           | ​ | ​ | ​                         | ​ | 1,941,502   | ​                         | ​ | ​ | ​ | ​ | 1,221,494 | ​ | ​ |
| Other accounts receivable                             | ​ | ​ | ​                         | ​ | 403,566     | ​                         | ​ | ​ | ​ | ​ | 41,160 | ​ | ​ |
| Prepaid expenses                                      | ​ | ​ | ​                         | ​ | 165,901     | ​                         | ​ | ​ | ​ | ​ | 120,064 | ​ | ​ |
| Total Assets                                          | ​ | ​ | ​                         | $       | 516,292,340 | ​                         | ​ | ​ | ​ | $ | 308,484,133 | ​ | ​ |
| Credit facilities                                     | ​ | ​ | ​                         | ​ | 61,000,000  | ​                         | ​ | ​ | ​ | ​ | 59,500,000 | ​ | ​ |
| Deferred credit facility fees                         | ​ | ​ | ​                         | ​ | (978,907)   | ​                         | ​ | ​ | ​ | ​ | (129,759) | ​ | ​ |
| Payable for securities purchased                      | ​ | ​ | ​                         | ​ | —     | ​                         | ​ | ​ | ​ | ​ | 80,699 | ​ | ​ |
| Deferred revenue                                      | ​ | ​ | ​                         | ​ | —     | ​                         | ​ | ​ | ​ | ​ | 100,000 | ​ | ​ |
| Reverse repurchase agreement                          | ​ | ​ | ​                         | ​ | 74,593,802  | ​                         | ​ | ​ | ​ | ​ | 79,560,129 | ​ | ​ |
| Accrued incentive fees                                | ​ | ​ | ​                         | ​ | 3,582,987   | ​                         | ​ | ​ | ​ | ​ | 1,071,566 | ​ | ​ |
| Due to affiliate                                      | ​ | ​ | ​                         | ​ | 81,537      | ​                         | ​ | ​ | ​ | ​ | 116,697 | ​ | ​ |
| Interest payable                                      | ​ | ​ | ​                         | ​ | 500,056     | ​                         | ​ | ​ | ​ | ​ | 163,981 | ​ | ​ |
| Accrued expenses and other liabilities                | ​ | ​ | ​                         | ​ | 1,199,644   | ​                         | ​ | ​ | ​ | ​ | 388,666 | ​ | ​ |
| Total Liabilities                                     | ​ | ​ | ​                         | $       | 139,979,119 | ​                         | ​ | ​ | ​ | $ | 140,981,738 | ​ | ​ |
| Total Net Assets                                      | ​ | ​ | ​                         | $       | 376,313,221 | ​                         | ​ | ​ | ​ | $ | 167,369,395 | ​ | ​ |
| Other Data:                                           | ​ | ​ | ​                         | ​ | ​     | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Total Return based on Net Asset Value(2)              | ​ | ​ | ​                         | ​ | (3.68)%     | ​                         | ​ | ​ | ​ | ​ | 3.27% | ​ | ​ |
| Net Asset Value per Share(1)                          | ​ | ​ | ​                         | ​ | 14.58       | ​                         | ​ | ​ | ​ | ​ | 15.14 | ​ | ​ |
| Weighted average shares outstanding for period, basic | ​ | ​ | ​                         | ​ | 18,701,021  | ​                         | ​ | ​ | ​ | ​ | 9,300,960 | ​ | ​ |
| Dividends declared and paid                           | ​ | ​ | ​                         | ​ | 40,651,334  | ​                         | ​ | ​ | ​ | ​ | 7,283,810 | ​ | ​ |

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| Investments                 | ​ | ​ | Cost    | ​ | ​     | Fair Value | ​ | ​ | Percentage ofTotal Portfolio | ​ |
|-----------------------------|---------|---------|---------|---------|-------------|------------|---------|---------|------------------------------|---------|
| Portfolio Investments       | ​ | ​ | ​ | ​ | ​     | ​    | ​ | ​ | ​                      | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Senior Secured Term Loans   | ​ | ​ | ​ | $       | 358,385,089 | ​    | ​ | ​ | ​                      | $       | 349,570,424 | ​ | ​ | ​ | ​ | ​ | 74.6% | ​ | ​ |
| Preferred Stock             | ​ | ​ | ​ | ​ | 250,000     | ​    | ​ | ​ | ​                      | ​ | 437,515 | ​ | ​ | ​ | ​ | ​ | 0.1 | ​ | ​ |
| Warrants                    | ​ | ​ | ​ | ​ | 18,383,811  | ​    | ​ | ​ | ​                      | ​ | 18,008,337 | ​ | ​ | ​ | ​ | ​ | 3.9 | ​ | ​ |
| Total Portfolio Investments | ​ | ​ | ​ | ​ | 377,018,900 | ​    | ​ | ​ | ​                      | ​ | 368,016,276 | ​ | ​ | ​ | ​ | ​ | 78.6 | ​ | ​ |
| U.S. Treasury Bill          | ​ | ​ | ​ | ​ | 99,982,765  | ​    | ​ | ​ | ​                      | ​ | 99,965,423 | ​ | ​ | ​ | ​ | ​ | 21.4 | ​ | ​ |
| Total Investments           | ​ | ​ | ​ | $       | 477,001,665 | ​    | ​ | ​ | ​                      | $       | 467,981,699 | ​ | ​ | ​ | ​ | ​ | 100.0% | ​ | ​ |
| Investments                 | ​ | ​ | Cost    | ​ | ​     | Fair Value | ​ | ​ | Percentage ofTotal Portfolio | ​ |
|-----------------------------|---------|---------|---------|---------|-------------|------------|---------|---------|------------------------------|---------|
| Portfolio Investments       | ​ | ​ | ​ | ​ | ​     | ​    | ​ | ​ | ​                      | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Senior Secured Term Loans   | ​ | ​ | ​ | $       | 208,588,381 | ​    | ​ | ​ | ​                      | $       | 208,539,353 | ​ | ​ | ​ | ​ | ​ | 68.5% | ​ | ​ |
| Preferred Stock             | ​ | ​ | ​ | ​ | 250,000     | ​    | ​ | ​ | ​                      | ​ | 461,826 | ​ | ​ | ​ | ​ | ​ | 0.2 | ​ | ​ |
| Warrants                    | ​ | ​ | ​ | ​ | 15,013,511  | ​    | ​ | ​ | ​                      | ​ | 15,247,210 | ​ | ​ | ​ | ​ | ​ | 5.0 | ​ | ​ |
| Total Portfolio Investments | ​ | ​ | ​ | ​ | 223,851,892 | ​    | ​ | ​ | ​                      | ​ | 224,248,389 | ​ | ​ | ​ | ​ | ​ | 73.7 | ​ | ​ |
| U.S. Treasury Bill          | ​ | ​ | ​ | ​ | 79,959,928  | ​    | ​ | ​ | ​                      | ​ | 79,959,928 | ​ | ​ | ​ | ​ | ​ | 26.3 | ​ | ​ |
| Total Investments           | ​ | ​ | ​ | $       | 303,811,820 | ​    | ​ | ​ | ​                      | $       | 304,208,317 | ​ | ​ | ​ | ​ | ​ | 100.0% | ​ | ​ |

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| ​                                                             | ​ | ​ | Year EndedDecember 31,2019 | ​ | ​       | Year EndedDecember 31,2018 | ​ | ​ | Year EndedDecember 31,2017 | ​ |
|---------------------------------------------------------------------|---------|---------|---------------------------------|---------|---------------|---------------------------------|---------|---------|---------------------------------|---------|
| Beginning Investment Portfolio                                      | ​ | ​ | ​                         | $       | 304,208,317   | ​                         | ​ | ​ | ​                         | $       | 140,721,508 | ​ | ​ | ​ | ​ | $ | 2,999,849 | ​ | ​ |
| Purchase of Investments(1)                                          | ​ | ​ | ​                         | ​ | 242,999,215   | ​                         | ​ | ​ | ​                         | ​ | 168,111,471 | ​ | ​ | ​ | ​ | ​ | 67,005,037 | ​ | ​ |
| Purchase of U.S. Treasury Bills                                     | ​ | ​ | ​                         | ​ | 315,836,640   | ​                         | ​ | ​ | ​                         | ​ | 270,444,962 | ​ | ​ | ​ | ​ | ​ | 156,977,177 | ​ | ​ |
| Amortization of Fixed Income Premiums and Discounts                 | ​ | ​ | ​                         | ​ | 13,021,775    | ​                         | ​ | ​ | ​                         | ​ | 4,621,487 | ​ | ​ | ​ | ​ | ​ | 834,194 | ​ | ​ |
| Portfolio Investments Repaid                                        | ​ | ​ | ​                         | ​ | (79,062,912)  | ​                         | ​ | ​ | ​                         | ​ | (14,500,629) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Sales and Maturities of Investments                                 | ​ | ​ | ​                         | ​ | (23,875,997)  | ​                         | ​ | ​ | ​                         | ​ | (2,251,899) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Sales and Maturities of U.S. Treasury Bills                         | ​ | ​ | ​                         | ​ | (295,955,273) | ​                         | ​ | ​ | ​                         | ​ | (262,989,682) | ​ | ​ | ​ | ​ | ​ | (87,500,000) | ​ | ​ |
| Realized gain on Investments                                        | ​ | ​ | ​                         | ​ | 226,396       | ​                         | ​ | ​ | ​                         | ​ | 59,792 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Net Change in Unrealized Appreciation (Depreciation) on Investments | ​ | ​ | ​                         | ​ | (9,416,462)   | ​                         | ​ | ​ | ​                         | ​ | (8,693) | ​ | ​ | ​ | ​ | ​ | 405,251 | ​ | ​ |
| Ending Investment Portfolio                                         | ​ | ​ | ​                         | $       | 467,981,699   | ​                         | ​ | ​ | ​                         | $       | 304,208,317 | ​ | ​ | ​ | ​ | $ | 140,721,508 | ​ | ​ |
| ​ | InvestmentRating | ​ | ​ | Rating Definition                                                                                                                                                                                                                                                                                                                                                             | ​ |
|---------|------------------|---------|---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------|
| ​ | 1                | ​ | ​ | Performing above plan and/or strong enterprise profile, value, financial performance/coverage. Maintaining full covenant and payment compliance as agreed.                                                                                                                                                                                                                    | ​ |
| ​ | 2                | ​ | ​ | Performing at or reasonably close to plan. Acceptable business prospects, enterprise value, financial coverage. Maintaining key covenant and payment compliance as agreed. All new loans are initially graded Category 2.                                                                                                                                                     | ​ |
| ​ | 3                | ​ | ​ | Performing below plan of record. Potential elements of concern over performance, trends and business outlook. Loan-to-value remains adequate. Potential key covenant non-compliance. Full payment compliance.                                                                                                                                                                 | ​ |
| ​ | 4                | ​ | ​ | Performing materially below plan. Non-compliant with material financial covenants. Payment default/deferral could result without corrective action. Requires close monitoring. Business prospects, enterprise value and collateral coverage declining. These investments may be in workout, and there is a possibility of loss of return but no loss of principal is expected | ​ |
| ​ | 5                | ​ | ​ | Going concern nature in question. Substantial decline in enterprise value and all coverages. Covenant and payment default imminent if not currently present. Investments are nearly always in workout. May experience partial and/or full loss.                                                                                                                               | ​ |

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| ​           | ​ | ​ | As of December 31, 2019 | ​ |
|-------------------|---------|---------|------------------------------|---------|
| Investment Rating | ​ | ​ | Fair Value                   | ​ | ​ | % of TotalPortfolio | ​ | ​ | Number ofPortfolioCompanies | ​ |
| 1                 | ​ | ​ | ​                      | $       | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| 2                 | ​ | ​ | ​                      | ​ | 217,278,446 | ​ | ​ | ​ | ​ | ​ | 46.4% | ​ | ​ | ​ | ​ | ​ | 11 | ​ | ​ |
| 3                 | ​ | ​ | ​                      | ​ | 119,109,762 | ​ | ​ | ​ | ​ | ​ | 25.5% | ​ | ​ | ​ | ​ | ​ | 8 | ​ | ​ |
| 4                 | ​ | ​ | ​                      | ​ | 8,870,625 | ​ | ​ | ​ | ​ | ​ | 1.9% | ​ | ​ | ​ | ​ | ​ | 1 | ​ | ​ |
| 5                 | ​ | ​ | ​                      | ​ | 4,311,591 | ​ | ​ | ​ | ​ | ​ | 0.9% | ​ | ​ | ​ | ​ | ​ | 1 | ​ | ​ |
| ​           | ​ | ​ | ​                      | $       | 349,570,424 | ​ | ​ | ​ | ​ | ​ | 74.7% | ​ | ​ | ​ | ​ | ​ | 21 | ​ | ​ |
| ​           |
| ​           | ​ | ​ | As of December 31, 2018 | ​ |
|-------------------|---------|---------|------------------------------|---------|
| Investment Rating | ​ | ​ | Fair Value                   | ​ | ​ | % of TotalPortfolio | ​ | ​ | Number ofPortfolioCompanies | ​ |
| 1                 | ​ | ​ | ​                      | $       | 14,762,697 | ​ | ​ | ​ | ​ | ​ | 4.9% | ​ | ​ | ​ | ​ | ​ | 1 | ​ | ​ |
| 2                 | ​ | ​ | ​                      | ​ | 107,685,007 | ​ | ​ | ​ | ​ | ​ | 35.4% | ​ | ​ | ​ | ​ | ​ | 9 | ​ | ​ |
| 3                 | ​ | ​ | ​                      | ​ | 78,292,451 | ​ | ​ | ​ | ​ | ​ | 25.7% | ​ | ​ | ​ | ​ | ​ | 6 | ​ | ​ |
| 4                 | ​ | ​ | ​                      | ​ | 7,799,198 | ​ | ​ | ​ | ​ | ​ | 2.6% | ​ | ​ | ​ | ​ | ​ | 1 | ​ | ​ |
| 5                 | ​ | ​ | ​                      | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| ​           | ​ | ​ | ​                      | $       | 208,539,353 | ​ | ​ | ​ | ​ | ​ | 68.6% | ​ | ​ | ​ | ​ | ​ | 17 | ​ | ​ |

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| ​                                                             | ​ | ​ | Year EndedDecember 31, 2019 | ​ | ​     | Year EndedDecember 31, 2018 | ​ | ​ | Year EndedDecember 31, 2017 | ​ |
|---------------------------------------------------------------------|---------|---------|----------------------------------|---------|-------------|----------------------------------|---------|---------|----------------------------------|---------|
| ​                                                             | ​ | ​ | Total                            | ​ | ​     | PerShare(1)                      | ​ | ​ | Total                            | ​ | ​ | PerShare(1) | ​ | ​ | Total | ​ | ​ | PerShare(1) | ​ |
| Investment income                                                   | ​ | ​ | ​                          | ​ | ​     | ​                          | ​ | ​ | ​                          | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Interest income                                                     | ​ | ​ | ​                          | $       | 54,450,955  | ​                          | ​ | ​ | ​                          | $       | 2.91 | ​ | ​ | ​ | ​ | $ | 19,565,467 | ​ | ​ | ​ | ​ | $ | 2.10 | ​ | ​ | ​ | ​ | $ | 3,051,077 | ​ | ​ | ​ | ​ | $ | 1.09 | ​ | ​ |
| Other income                                                        | ​ | ​ | ​                          | ​ | 688,181     | ​                          | ​ | ​ | ​                          | ​ | 0.04 | ​ | ​ | ​ | ​ | ​ | 1,190,587 | ​ | ​ | ​ | ​ | ​ | 0.13 | ​ | ​ | ​ | ​ | ​ | 138,645 | ​ | ​ | ​ | ​ | ​ | 0.05 | ​ | ​ |
| Dividend income                                                     | ​ | ​ | ​                          | ​ | —     | ​                          | ​ | ​ | ​                          | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 117 | ​ | ​ | ​ | ​ | ​ | 0.00 | ​ | ​ |
| Total investment income                                             | ​ | ​ | ​                          | ​ | 55,139,136  | ​                          | ​ | ​ | ​                          | ​ | 2.95 | ​ | ​ | ​ | ​ | ​ | 20,756,054 | ​ | ​ | ​ | ​ | ​ | 2.23 | ​ | ​ | ​ | ​ | ​ | 3,189,839 | ​ | ​ | ​ | ​ | ​ | 1.14 | ​ | ​ |
| Operating expenses                                                  | ​ | ​ | ​                          | ​ | ​     | ​                          | ​ | ​ | ​                          | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Management fees                                                     | ​ | ​ | ​                          | ​ | 5,105,009   | ​                          | ​ | ​ | ​                          | ​ | 0.27 | ​ | ​ | ​ | ​ | ​ | 4,812,500 | ​ | ​ | ​ | ​ | ​ | 0.51 | ​ | ​ | ​ | ​ | ​ | 3,587,314 | ​ | ​ | ​ | ​ | ​ | 1.28 | ​ | ​ |
| Incentive fees                                                      | ​ | ​ | ​                          | ​ | 8,349,449   | ​                          | ​ | ​ | ​                          | ​ | 0.45 | ​ | ​ | ​ | ​ | ​ | 1,411,324 | ​ | ​ | ​ | ​ | ​ | 0.15 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Interest expense                                                    | ​ | ​ | ​                          | ​ | 1,186,466   | ​                          | ​ | ​ | ​                          | ​ | 0.06 | ​ | ​ | ​ | ​ | ​ | 532,732 | ​ | ​ | ​ | ​ | ​ | 0.06 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Professional fees                                                   | ​ | ​ | ​                          | ​ | 975,688     | ​                          | ​ | ​ | ​                          | ​ | 0.05 | ​ | ​ | ​ | ​ | ​ | 700,019 | ​ | ​ | ​ | ​ | ​ | 0.08 | ​ | ​ | ​ | ​ | ​ | 544,002 | ​ | ​ | ​ | ​ | ​ | 0.19 | ​ | ​ |
| Overhead allocation expense                                         | ​ | ​ | ​                          | ​ | 855,889     | ​                          | ​ | ​ | ​                          | ​ | 0.05 | ​ | ​ | ​ | ​ | ​ | 454,337 | ​ | ​ | ​ | ​ | ​ | 0.05 | ​ | ​ | ​ | ​ | ​ | 313,147 | ​ | ​ | ​ | ​ | ​ | 0.11 | ​ | ​ |
| Administration fees                                                 | ​ | ​ | ​                          | ​ | 490,022     | ​                          | ​ | ​ | ​                          | ​ | 0.03 | ​ | ​ | ​ | ​ | ​ | 209,761 | ​ | ​ | ​ | ​ | ​ | 0.02 | ​ | ​ | ​ | ​ | ​ | 125,000 | ​ | ​ | ​ | ​ | ​ | 0.04 | ​ | ​ |
| Credit facility fees                                                | ​ | ​ | ​                          | ​ | 478,731     | ​                          | ​ | ​ | ​                          | ​ | 0.03 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Directors’ fees                                               | ​ | ​ | ​                          | ​ | 222,154     | ​                          | ​ | ​ | ​                          | ​ | 0.01 | ​ | ​ | ​ | ​ | ​ | 208,000 | ​ | ​ | ​ | ​ | ​ | 0.02 | ​ | ​ | ​ | ​ | ​ | 206,500 | ​ | ​ | ​ | ​ | ​ | 0.08 | ​ | ​ |
| Consulting fees                                                     | ​ | ​ | ​                          | ​ | 110,328     | ​                          | ​ | ​ | ​                          | ​ | 0.01 | ​ | ​ | ​ | ​ | ​ | 66,933 | ​ | ​ | ​ | ​ | ​ | 0.01 | ​ | ​ | ​ | ​ | ​ | 49,650 | ​ | ​ | ​ | ​ | ​ | 0.02 | ​ | ​ |
| Tax expense                                                         | ​ | ​ | ​                          | ​ | 99,549      | ​                          | ​ | ​ | ​                          | ​ | 0.01 | ​ | ​ | ​ | ​ | ​ | 186,782 | ​ | ​ | ​ | ​ | ​ | 0.02 | ​ | ​ | ​ | ​ | ​ | 3,414 | ​ | ​ | ​ | ​ | ​ | 0.00 | ​ | ​ |
| Insurance expense                                                   | ​ | ​ | ​                          | ​ | 96,296      | ​                          | ​ | ​ | ​                          | ​ | 0.01 | ​ | ​ | ​ | ​ | ​ | 96,062 | ​ | ​ | ​ | ​ | ​ | 0.01 | ​ | ​ | ​ | ​ | ​ | 89,092 | ​ | ​ | ​ | ​ | ​ | 0.03 | ​ | ​ |
| General and administrative expenses                                 | ​ | ​ | ​                          | ​ | 26,264      | ​                          | ​ | ​ | ​                          | ​ | 0.00 | ​ | ​ | ​ | ​ | ​ | 101,984 | ​ | ​ | ​ | ​ | ​ | 0.01 | ​ | ​ | ​ | ​ | ​ | 41,900 | ​ | ​ | ​ | ​ | ​ | 0.01 | ​ | ​ |
| Other expenses                                                      | ​ | ​ | ​                          | ​ | 689,460     | ​                          | ​ | ​ | ​                          | ​ | 0.04 | ​ | ​ | ​ | ​ | ​ | 269,203 | ​ | ​ | ​ | ​ | ​ | 0.03 | ​ | ​ | ​ | ​ | ​ | 71,366 | ​ | ​ | ​ | ​ | ​ | 0.04 | ​ | ​ |
| Total operating expenses                                            | ​ | ​ | ​                          | ​ | 18,685,305  | ​                          | ​ | ​ | ​                          | ​ | 1.00 | ​ | ​ | ​ | ​ | ​ | 9,049,637 | ​ | ​ | ​ | ​ | ​ | 0.97 | ​ | ​ | ​ | ​ | ​ | 5,031,385 | ​ | ​ | ​ | ​ | ​ | 1.80 | ​ | ​ |
| Net investment income (loss)                                        | ​ | ​ | ​                          | ​ | 36,453,831  | ​                          | ​ | ​ | ​                          | ​ | 1.95 | ​ | ​ | ​ | ​ | ​ | 11,706,417 | ​ | ​ | ​ | ​ | ​ | 1.26 | ​ | ​ | ​ | ​ | ​ | (1,841,546) | ​ | ​ | ​ | ​ | ​ | (0.66) | ​ | ​ |
| Realized gain on investments                                        | ​ | ​ | ​                          | ​ | 609,031     | ​                          | ​ | ​ | ​                          | ​ | 0.03 | ​ | ​ | ​ | ​ | ​ | 59,792 | ​ | ​ | ​ | ​ | ​ | 0.00 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Net change in unrealized appreciation (depreciation) on investments | ​ | ​ | ​                          | ​ | (9,416,462) | ​                          | ​ | ​ | ​                          | ​ | (0.50) | ​ | ​ | ​ | ​ | ​ | (8,693) | ​ | ​ | ​ | ​ | ​ | 0.00 | ​ | ​ | ​ | ​ | ​ | 405,251 | ​ | ​ | ​ | ​ | ​ | 0.14 | ​ | ​ |
| Net increase (decrease) in net assets resulting from operations     | ​ | ​ | ​                          | ​ | 27,646,400  | ​                          | ​ | ​ | ​                          | ​ | 1.48 | ​ | ​ | ​ | ​ | ​ | 11,757,516 | ​ | ​ | ​ | ​ | ​ | 1.26 | ​ | ​ | ​ | ​ | ​ | (1,436,295) | ​ | ​ | ​ | ​ | ​ | (0.51) | ​ | ​ |

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| Issuance Date             | ​ | ​ | Shares Issued | ​ | ​    | Price Per Share | ​ | ​ | Gross Proceeds | ​ |
|---------------------------|---------|---------|---------------|---------|------------|-----------------|---------|---------|----------------|---------|
| December 22, 2016    | ​ | ​ | ​       | ​ | 333,333    | ​         | ​ | ​ | ​        | $       | 15.00 | ​ | ​ | ​ | ​ | $ | 5,000,000 | ​ | ​ |
| April 19, 2017       | ​ | ​ | ​       | ​ | 1,000,000  | ​         | ​ | ​ | ​        | ​ | 15.00 | ​ | ​ | ​ | ​ | ​ | 15,000,000 | ​ | ​ |
| June 26, 2017        | ​ | ​ | ​       | ​ | 1,666,667  | ​         | ​ | ​ | ​        | ​ | 15.00 | ​ | ​ | ​ | ​ | ​ | 25,000,000 | ​ | ​ |
| September 12, 2017   | ​ | ​ | ​       | ​ | 2,666,667  | ​         | ​ | ​ | ​        | ​ | 15.00 | ​ | ​ | ​ | ​ | ​ | 40,000,000 | ​ | ​ |
| December 22, 2017    | ​ | ​ | ​       | ​ | 3,000,000  | ​         | ​ | ​ | ​        | ​ | 15.00 | ​ | ​ | ​ | ​ | ​ | 45,000,000 | ​ | ​ |
| May 31, 2018(1)      | ​ | ​ | ​       | ​ | 70,563     | ​         | ​ | ​ | ​        | ​ | 14.82 | ​ | ​ | ​ | ​ | ​ | 1,045,570 | ​ | ​ |
| August 31, 2018(1)   | ​ | ​ | ​       | ​ | 117,582    | ​         | ​ | ​ | ​        | ​ | 14.92 | ​ | ​ | ​ | ​ | ​ | 1,754,244 | ​ | ​ |
| September 27, 2018   | ​ | ​ | ​       | ​ | 1,997,337  | ​         | ​ | ​ | ​        | ​ | 15.02 | ​ | ​ | ​ | ​ | ​ | 30,000,000 | ​ | ​ |
| November 15, 2018(1) | ​ | ​ | ​       | ​ | 202,779    | ​         | ​ | ​ | ​        | ​ | 15.07 | ​ | ​ | ​ | ​ | ​ | 3,055,498 | ​ | ​ |
| January 14, 2019     | ​ | ​ | ​       | ​ | 4,344,964  | ​         | ​ | ​ | ​        | ​ | 15.19 | ​ | ​ | ​ | ​ | ​ | 66,000,000 | ​ | ​ |
| March 26, 2019(1)    | ​ | ​ | ​       | ​ | 326,431    | ​         | ​ | ​ | ​        | ​ | 15.14 | ​ | ​ | ​ | ​ | ​ | 4,942,168 | ​ | ​ |
| May 21, 2019(1)      | ​ | ​ | ​       | ​ | 374,783    | ​         | ​ | ​ | ​        | ​ | 15.13 | ​ | ​ | ​ | ​ | ​ | 5,670,467 | ​ | ​ |
| May 24, 2019         | ​ | ​ | ​       | ​ | 3,232,189  | ​         | ​ | ​ | ​        | ​ | 15.16 | ​ | ​ | ​ | ​ | ​ | 49,000,000 | ​ | ​ |
| July 16, 2019(1)     | ​ | ​ | ​       | ​ | 464,986    | ​         | ​ | ​ | ​        | ​ | 15.13 | ​ | ​ | ​ | ​ | ​ | 7,035,237 | ​ | ​ |
| August 26, 2019(1)   | ​ | ​ | ​       | ​ | 480,121    | ​         | ​ | ​ | ​        | ​ | 14.76 | ​ | ​ | ​ | ​ | ​ | 7,088,143 | ​ | ​ |
| October 15, 2019     | ​ | ​ | ​       | ​ | 1,666,667  | ​         | ​ | ​ | ​        | ​ | 15.00 | ​ | ​ | ​ | ​ | ​ | 25,000,000 | ​ | ​ |
| November 12, 2019(1) | ​ | ​ | ​       | ​ | 43,979     | ​         | ​ | ​ | ​        | ​ | 14.76 | ​ | ​ | ​ | ​ | ​ | 649,123 | ​ | ​ |
| December 20, 2019    | ​ | ​ | ​       | ​ | 3,333,333  | ​         | ​ | ​ | ​        | ​ | 15.00 | ​ | ​ | ​ | ​ | ​ | 50,000,000 | ​ | ​ |
| December 23, 2019(1) | ​ | ​ | ​       | ​ | 487,166    | ​         | ​ | ​ | ​        | ​ | 14.52 | ​ | ​ | ​ | ​ | ​ | 7,073,649 | ​ | ​ |
| Total                     | ​ | ​ | ​       | ​ | 25,809,547 | ​         | ​ | ​ | ​        | ​ | ​ | ​ | ​ | ​ | ​ | $ | 388,314,099 | ​ | ​ |
| ​                         | ​ | ​ | Payments Due By Period | ​ |
|---------------------------------|---------|---------|------------------------|---------|
| ​                         | ​ | ​ | Total                  | ​ | ​ | Less than1 year | ​ | ​ | 1 – 3 years | ​ | ​ | 3 – 5 years | ​ | ​ | More than5 years | ​ |
| Reverse repurchase agreement(1) | ​ | ​ | ​                | $       | 74,593,802 | ​ | ​ | ​ | ​ | $ | 74,593,802 | ​ | ​ | ​ | ​ | $ |    — | ​ | ​ | ​ | ​ | $ |    — | ​ | ​ | ​ | ​ | $ |    — | ​ | ​ |
| Credit facilities(2)            | ​ | ​ | ​                | ​ | 61,000,000 | ​ | ​ | ​ | ​ | ​ | 61,000,000 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Total                           | ​ | ​ | ​                | $       | 135,593,802 | ​ | ​ | ​ | ​ | $ | 135,593,802 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | $ | — | ​ | ​ |

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| Date Declared           | ​ | ​ | Record Date                    | ​ | ​ | Payment Date                  | ​ | ​ | Amountper Share | ​ |
|-------------------------|---------|---------|--------------------------------|---------|---------|-------------------------------|---------|---------|-----------------|---------|
| May 3, 2018        | ​ | ​ | May 15, 2018​       | ​ | ​ | May 31, 2018​      | ​ | ​ | ​         | $       | 0.15 | ​ | ​ |
| July 26, 2018      | ​ | ​ | August 15, 2018​    | ​ | ​ | August 31, 2018​   | ​ | ​ | ​         | $       | 0.25 | ​ | ​ |
| November 1, 2018   | ​ | ​ | October 31, 2018​   | ​ | ​ | November 15, 2018​ | ​ | ​ | ​         | $       | 0.35 | ​ | ​ |
| March 22, 2019     | ​ | ​ | March 22, 2019​     | ​ | ​ | March 26, 2019​    | ​ | ​ | ​         | $       | 0.40 | ​ | ​ |
| May 2, 2019        | ​ | ​ | May 7, 2019​        | ​ | ​ | May 21, 2019​      | ​ | ​ | ​         | $       | 0.45 | ​ | ​ |
| May 2, 2019        | ​ | ​ | May 31, 2019​       | ​ | ​ | July 16, 2019​     | ​ | ​ | ​         | $       | 0.46 | ​ | ​ |
| July 30, 2019      | ​ | ​ | August 8, 2019​     | ​ | ​ | August 26, 2019​   | ​ | ​ | ​         | $       | 0.45 | ​ | ​ |
| September 27, 2019 | ​ | ​ | September 30, 2019​ | ​ | ​ | November 12, 2019​ | ​ | ​ | ​         | $       | 0.04 | ​ | ​ |
| December 9, 2019   | ​ | ​ | December 10, 2019​  | ​ | ​ | December 23, 2019​ | ​ | ​ | ​         | $       | 0.40 | ​ | ​ |

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| ​                     | ​ | ​ | As of December 31, 2019 | ​ |
|-----------------------------|---------|---------|------------------------------|---------|
| ​                     | ​ | ​ | Level 1                 | ​ | ​ | Level 2 | ​ | ​ | Level 3 | ​ | ​ | Total | ​ |
| Portfolio Investments       | ​ | ​ | ​                      | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Senior Secured Term Loans   | ​ | ​ | ​                      | $       | — | ​ | ​ | ​ | ​ | $ |    — | ​ | ​ | ​ | ​ | $ | 349,570,424 | ​ | ​ | ​ | ​ | $ | 349,570,424 | ​ | ​ |
| Preferred Stock             | ​ | ​ | ​                      | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 437,515 | ​ | ​ | ​ | ​ | ​ | 437,515 | ​ | ​ |
| Warrants                    | ​ | ​ | ​                      | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 18,008,337 | ​ | ​ | ​ | ​ | ​ | 18,008,337 | ​ | ​ |
| Total Portfolio Investments | ​ | ​ | ​                      | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 368,016,276 | ​ | ​ | ​ | ​ | ​ | 368,016,276 | ​ | ​ |
| U.S. Treasury Bill          | ​ | ​ | ​                      | ​ | 99,965,423 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 99,965,423 | ​ | ​ |
| Total Investments           | ​ | ​ | ​                      | $       | 99,965,423 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | $ | 368,016,276 | ​ | ​ | ​ | ​ | $ | 467,981,699 | ​ | ​ |
| ​                     |
| ​                     | ​ | ​ | As of December 31, 2018 | ​ |
|-----------------------------|---------|---------|------------------------------|---------|
| ​                     | ​ | ​ | Level 1                 | ​ | ​ | Level 2 | ​ | ​ | Level 3 | ​ | ​ | Total | ​ |
| Portfolio Investments       | ​ | ​ | ​                      | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Senior Secured Term Loans   | ​ | ​ | ​                      | $       | — | ​ | ​ | ​ | ​ | $ |    — | ​ | ​ | ​ | ​ | $ | 208,539,353 | ​ | ​ | ​ | ​ | $ | 208,539,353 | ​ | ​ |
| Senior Secured Term Loans   | ​ | ​ | ​                      | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 461,826 | ​ | ​ | ​ | ​ | ​ | 461,826 | ​ | ​ |
| Warrants                    | ​ | ​ | ​                      | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 15,247,210 | ​ | ​ | ​ | ​ | ​ | 15,247,210 | ​ | ​ |
| Total Portfolio Investments | ​ | ​ | ​                      | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 224,248,389 | ​ | ​ | ​ | ​ | ​ | 224,248,389 | ​ | ​ |
| U.S. Treasury Bill          | ​ | ​ | ​                      | ​ | 79,959,928 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 79,959,928 | ​ | ​ |
| Total Investments           | ​ | ​ | ​                      | $       | 79,959,928 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | $ | 224,248,389 | ​ | ​ | ​ | ​ | $ | 304,208,317 | ​ | ​ |

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| Date                  | ​ | ​ | Investment Name                             | ​ | ​ | Principal | ​ | ​    | Cost Allocatedto Loan | ​ | ​ | Cost Allocatedto Warrant | ​ |
|-----------------------|---------|---------|---------------------------------------------|---------|---------|-----------|---------|------------|-----------------------|---------|---------|--------------------------|---------|
| January 7, 2020  | ​ | ​ | Credit Sesame, Inc.                         | ​ | ​ | ​   | $       | 43,637,431 | ​               | ​ | ​ | ​                  | $       | 43,212,631 | ​ | ​ | ​ | ​ | $ | 424,800 | ​ | ​ |
| January 30, 2020 | ​ | ​ | Aginity, Inc.                               | ​ | ​ | ​   | $       | 350,000    | ​               | ​ | ​ | ​                  | $       | 350,000 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ |
| March 9, 2020    | ​ | ​ | Aginity, Inc.                               | ​ | ​ | ​   | $       | 200,000    | ​               | ​ | ​ | ​                  | $       | 200,000 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ |
| March 10, 2020   | ​ | ​ | Aginity, Inc.                               | ​ | ​ | ​   | $       | 421,861    | ​               | ​ | ​ | ​                  | $       | 421,861 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ |
| March 16, 2020   | ​ | ​ | Longtail Ad Solutions, Inc. (dba JW Player) | ​ | ​ | ​   | $       | 5,000,000  | ​               | ​ | ​ | ​                  | $       | 5,000,000 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ |

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| ​                                                                                            | ​ | ​ |  Page  | ​ |
|----------------------------------------------------------------------------------------------------|---------|---------|--------------------|---------|
| Report of Independent Registered Public Accounting Firm                                            | ​ | ​ | ​            | ​ | 74 | ​ | ​ |
| Statements of Assets and Liabilities as of December 31, 2019 and 2018                         | ​ | ​ | ​            | ​ | 75 | ​ | ​ |
| Statements of Operations for the years ended December 31, 2019, 2018 and 2017            | ​ | ​ | ​            | ​ | 76 | ​ | ​ |
| Statements of Changes in Net Assets for the years ended December 31, 2019, 2018 and 2017 | ​ | ​ | ​            | ​ | 77 | ​ | ​ |
| Statements of Cash Flows for the years ended December 31, 2019, 2018 and 2017            | ​ | ​ | ​            | ​ | 78 | ​ | ​ |
| Schedules of Investments as of December 31, 2019 and 2018                                     | ​ | ​ | ​            | ​ | 79 | ​ | ​ |
| Notes to Financial Statements                                                                      | ​ | ​ | ​            | ​ | 90 | ​ | ​ |

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| ​                                                                                                                             | ​ | ​ | December 31,2019 | ​ | ​     | December 31,2018 | ​ |
|-------------------------------------------------------------------------------------------------------------------------------------|---------|---------|-----------------------|---------|-------------|-----------------------|---------|
| Assets                                                                                                                              | ​ | ​ | ​               | ​ | ​     | ​               | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Investments at fair value:                                                                                                          | ​ | ​ | ​               | ​ | ​     | ​               | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Non-control/non-affiliate investments at fair value (cost of  $377,018,900 and $223,851,892, respectively)                    | ​ | ​ | ​               | $       | 368,016,276 | ​               | ​ | ​ | ​ | $ | 224,248,389 | ​ | ​ |
| Investment in U.S. Treasury Bills at fair value (cost of  $99,982,765 and $79,959,928, respectively)                          | ​ | ​ | ​               | ​ | 99,965,423  | ​               | ​ | ​ | ​ | ​ | 79,959,928 | ​ | ​ |
| Total investments at fair value (cost of  $477,001,665 and $303,811,820, respectively)                                        | ​ | ​ | ​               | ​ | 467,981,699 | ​               | ​ | ​ | ​ | ​ | 304,208,317 | ​ | ​ |
| Cash and cash equivalents                                                                                                           | ​ | ​ | ​               | ​ | 45,799,672  | ​               | ​ | ​ | ​ | ​ | 2,527,474 | ​ | ​ |
| Deferred offering costs                                                                                                             | ​ | ​ | ​               | ​ | —     | ​               | ​ | ​ | ​ | ​ | 102,865 | ​ | ​ |
| Accrued interest receivable                                                                                                         | ​ | ​ | ​               | ​ | 1,941,502   | ​               | ​ | ​ | ​ | ​ | 1,221,494 | ​ | ​ |
| Other accounts receivable                                                                                                           | ​ | ​ | ​               | ​ | 403,566     | ​               | ​ | ​ | ​ | ​ | 41,160 | ​ | ​ |
| Prepaid expenses                                                                                                                    | ​ | ​ | ​               | ​ | 165,901     | ​               | ​ | ​ | ​ | ​ | 120,064 | ​ | ​ |
| Total assets                                                                                                                        | ​ | ​ | ​               | ​ | 516,292,340 | ​               | ​ | ​ | ​ | ​ | 308,221,374 | ​ | ​ |
| Liabilities                                                                                                                         | ​ | ​ | ​               | ​ | ​     | ​               | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Debt:                                                                                                                               | ​ | ​ | ​               | ​ | ​     | ​               | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Credit facilities                                                                                                                   | ​ | ​ | ​               | ​ | 61,000,000  | ​               | ​ | ​ | ​ | ​ | 59,500,000 | ​ | ​ |
| Deferred credit facility fees (net of accumulated amortization of   $129,290 and $82,648, respectively)                 | ​ | ​ | ​               | ​ | (978,907)   | ​               | ​ | ​ | ​ | ​ | (129,759) | ​ | ​ |
| Total debt, less unamortized deferred financing costs                                                                               | ​ | ​ | ​               | ​ | 60,021,093  | ​               | ​ | ​ | ​ | ​ | 59,370,241 | ​ | ​ |
| Payable for securities purchased                                                                                                    | ​ | ​ | ​               | ​ | —     | ​               | ​ | ​ | ​ | ​ | 80,699 | ​ | ​ |
| Deferred revenue                                                                                                                    | ​ | ​ | ​               | ​ | —     | ​               | ​ | ​ | ​ | ​ | 100,000 | ​ | ​ |
| Reverse repurchase agreement                                                                                                        | ​ | ​ | ​               | ​ | 74,593,802  | ​               | ​ | ​ | ​ | ​ | 79,560,129 | ​ | ​ |
| Accrued incentive fees                                                                                                              | ​ | ​ | ​               | ​ | 3,582,987   | ​               | ​ | ​ | ​ | ​ | 1,071,566 | ​ | ​ |
| Due to affiliate                                                                                                                    | ​ | ​ | ​               | ​ | 81,537      | ​               | ​ | ​ | ​ | ​ | 116,697 | ​ | ​ |
| Interest payable                                                                                                                    | ​ | ​ | ​               | ​ | 500,056     | ​               | ​ | ​ | ​ | ​ | 163,981 | ​ | ​ |
| Accrued expenses and other liabilities                                                                                              | ​ | ​ | ​               | ​ | 1,199,644   | ​               | ​ | ​ | ​ | ​ | 388,666 | ​ | ​ |
| Total liabilities                                                                                                                   | ​ | ​ | ​               | ​ | 139,979,119 | ​               | ​ | ​ | ​ | ​ | 140,981,738 | ​ | ​ |
| Commitments and contingencies (Note 3)                                                                                              | ​ | ​ | ​               | ​ | ​     | ​               | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Net assets                                                                                                                          | ​ | ​ | ​               | ​ | ​     | ​               | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Common stock, $0.01 par value; 100,000,000 shares authorized; 25,811,214 and 11,056,595 shares issued and outstanding, respectively | ​ | ​ | ​               | ​ | 258,112     | ​               | ​ | ​ | ​ | ​ | 110,566 | ​ | ​ |
| Additional paid-in capital                                                                                                          | ​ | ​ | ​               | ​ | 384,369,854 | ​               | ​ | ​ | ​ | ​ | 162,568,188 | ​ | ​ |
| Distributable (losses) earnings                                                                                                     | ​ | ​ | ​               | ​ | (8,314,745) | ​               | ​ | ​ | ​ | ​ | 4,690,641 | ​ | ​ |
| Total net assets                                                                                                                    | ​ | ​ | ​               | $       | 376,313,221 | ​               | ​ | ​ | ​ | $ | 167,369,395 | ​ | ​ |
| Net asset value per share                                                                                                           | ​ | ​ | ​               | $       | 14.58       | ​               | ​ | ​ | ​ | $ | 15.14 | ​ | ​ |

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| ​                                                                                                                      | ​ | ​ | Year EndedDecember 31,2019 | ​ | ​     | Year EndedDecember 31,2018 | ​ | ​ | Year EndedDecember 31,2017 | ​ |
|------------------------------------------------------------------------------------------------------------------------------|---------|---------|---------------------------------|---------|-------------|---------------------------------|---------|---------|---------------------------------|---------|
| Investment income                                                                                                            | ​ | ​ | ​                         | ​ | ​     | ​                         | ​ | ​ | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| From non-control/non-affiliate:                                                                                              | ​ | ​ | ​                         | ​ | ​     | ​                         | ​ | ​ | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Interest income                                                                                                              | ​ | ​ | ​                         | $       | 53,015,168  | ​                         | ​ | ​ | ​                         | $       | 19,446,270 | ​ | ​ | ​ | ​ | $ | 3,023,456 | ​ | ​ |
| Payment in-kind interest income                                                                                              | ​ | ​ | ​                         | ​ | 1,329,413   | ​                         | ​ | ​ | ​                         | ​ | 49,859 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Other income                                                                                                                 | ​ | ​ | ​                         | ​ | 557,796     | ​                         | ​ | ​ | ​                         | ​ | 900,377 | ​ | ​ | ​ | ​ | ​ | 50,000 | ​ | ​ |
| Interest income from U.S. Treasury Bills                                                                                     | ​ | ​ | ​                         | ​ | 106,374     | ​                         | ​ | ​ | ​                         | ​ | 69,338 | ​ | ​ | ​ | ​ | ​ | 27,621 | ​ | ​ |
| Other income from non-investment sources                                                                                     | ​ | ​ | ​                         | ​ | 130,385     | ​                         | ​ | ​ | ​                         | ​ | 290,210 | ​ | ​ | ​ | ​ | ​ | 88,645 | ​ | ​ |
| Dividend income                                                                                                              | ​ | ​ | ​                         | ​ | —     | ​                         | ​ | ​ | ​                         | ​ | — | ​ | ​ | ​ | ​ | ​ | 117 | ​ | ​ |
| Total investment income                                                                                                      | ​ | ​ | ​                         | ​ | 55,139,136  | ​                         | ​ | ​ | ​                         | ​ | 20,756,054 | ​ | ​ | ​ | ​ | ​ | 3,189,839 | ​ | ​ |
| Operating expenses                                                                                                           | ​ | ​ | ​                         | ​ | ​     | ​                         | ​ | ​ | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Management fees                                                                                                              | ​ | ​ | ​                         | ​ | 5,105,009   | ​                         | ​ | ​ | ​                         | ​ | 4,812,500 | ​ | ​ | ​ | ​ | ​ | 3,587,314 | ​ | ​ |
| Incentive fees                                                                                                               | ​ | ​ | ​                         | ​ | 8,349,449   | ​                         | ​ | ​ | ​                         | ​ | 1,411,324 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Interest expense                                                                                                             | ​ | ​ | ​                         | ​ | 1,186,466   | ​                         | ​ | ​ | ​                         | ​ | 532,732 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Professional fees                                                                                                            | ​ | ​ | ​                         | ​ | 975,688     | ​                         | ​ | ​ | ​                         | ​ | 700,019 | ​ | ​ | ​ | ​ | ​ | 544,002 | ​ | ​ |
| Overhead allocation expense                                                                                                  | ​ | ​ | ​                         | ​ | 855,889     | ​                         | ​ | ​ | ​                         | ​ | 454,337 | ​ | ​ | ​ | ​ | ​ | 313,147 | ​ | ​ |
| Administration fee                                                                                                           | ​ | ​ | ​                         | ​ | 490,022     | ​                         | ​ | ​ | ​                         | ​ | 209,761 | ​ | ​ | ​ | ​ | ​ | 125,000 | ​ | ​ |
| Facility fees                                                                                                                | ​ | ​ | ​                         | ​ | 478,731     | ​                         | ​ | ​ | ​                         | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Directors’ fees                                                                                                        | ​ | ​ | ​                         | ​ | 222,154     | ​                         | ​ | ​ | ​                         | ​ | 208,000 | ​ | ​ | ​ | ​ | ​ | 206,500 | ​ | ​ |
| Consulting fees                                                                                                              | ​ | ​ | ​                         | ​ | 110,328     | ​                         | ​ | ​ | ​                         | ​ | 66,933 | ​ | ​ | ​ | ​ | ​ | 49,650 | ​ | ​ |
| Tax expense                                                                                                                  | ​ | ​ | ​                         | ​ | 99,549      | ​                         | ​ | ​ | ​                         | ​ | 186,782 | ​ | ​ | ​ | ​ | ​ | 3,414 | ​ | ​ |
| Insurance expense                                                                                                            | ​ | ​ | ​                         | ​ | 96,296      | ​                         | ​ | ​ | ​                         | ​ | 96,062 | ​ | ​ | ​ | ​ | ​ | 89,092 | ​ | ​ |
| General and administrative expenses                                                                                          | ​ | ​ | ​                         | ​ | 26,264      | ​                         | ​ | ​ | ​                         | ​ | 101,984 | ​ | ​ | ​ | ​ | ​ | 41,900 | ​ | ​ |
| Other expenses                                                                                                               | ​ | ​ | ​                         | ​ | 689,460     | ​                         | ​ | ​ | ​                         | ​ | 269,203 | ​ | ​ | ​ | ​ | ​ | 71,366 | ​ | ​ |
| Total operating expenses                                                                                                     | ​ | ​ | ​                         | ​ | 18,685,305  | ​                         | ​ | ​ | ​                         | ​ | 9,049,637 | ​ | ​ | ​ | ​ | ​ | 5,031,385 | ​ | ​ |
| Net investment income (loss)                                                                                                 | ​ | ​ | ​                         | ​ | 36,453,831  | ​                         | ​ | ​ | ​                         | ​ | 11,706,417 | ​ | ​ | ​ | ​ | ​ | (1,841,546) | ​ | ​ |
| Realized and unrealized gain (loss) on investments                                                                           | ​ | ​ | ​                         | ​ | ​     | ​                         | ​ | ​ | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Realized gain on non-control/non-affiliate investments, including U.S. Treasury Bills                                        | ​ | ​ | ​                         | ​ | 609,031     | ​                         | ​ | ​ | ​                         | ​ | 59,792 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Net change in unrealized appreciation (depreciation) on non-control/non-affiliate investments, including U.S. Treasury Bills | ​ | ​ | ​                         | ​ | (9,416,462) | ​                         | ​ | ​ | ​                         | ​ | (8,693) | ​ | ​ | ​ | ​ | ​ | 405,251 | ​ | ​ |
| Net realized and unrealized gain (loss) on investments                                                                       | ​ | ​ | ​                         | ​ | (8,807,431) | ​                         | ​ | ​ | ​                         | ​ | 51,099 | ​ | ​ | ​ | ​ | ​ | 405,251 | ​ | ​ |
| Net increase (decrease) in net assets resulting from operations                                                              | ​ | ​ | ​                         | $       | 27,646,400  | ​                         | ​ | ​ | ​                         | $       | 11,757,516 | ​ | ​ | ​ | ​ | $ | (1,436,295) | ​ | ​ |
| Net increase (decrease) in net assets resulting from operations per common share                                             | ​ | ​ | ​                         | $       | 1.48        | ​                         | ​ | ​ | ​                         | $       | 1.26 | ​ | ​ | ​ | ​ | $ | (0.51) | ​ | ​ |
| Net investment income (loss) per common share                                                                                | ​ | ​ | ​                         | $       | 1.95        | ​                         | ​ | ​ | ​                         | $       | 1.26 | ​ | ​ | ​ | ​ | $ | (0.66) | ​ | ​ |
| Weighted-average shares outstanding                                                                                          | ​ | ​ | ​                         | ​ | 18,701,021  | ​                         | ​ | ​ | ​                         | ​ | 9,300,960 | ​ | ​ | ​ | ​ | ​ | 2,795,274 | ​ | ​ |

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| ​                                                                                     | ​ | ​ | Year EndedDecember 31,2019 | ​ | ​      | Year EndedDecember 31,2018 | ​ | ​ | Year EndedDecember 31,2017 | ​ |
|---------------------------------------------------------------------------------------------|---------|---------|---------------------------------|---------|--------------|---------------------------------|---------|---------|---------------------------------|---------|
| Net increase (decrease) in net assets from operations                                       | ​ | ​ | ​                         | ​ | ​      | ​                         | ​ | ​ | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Net investment income (loss)                                                                | ​ | ​ | ​                         | $       | 36,453,831   | ​                         | ​ | ​ | ​                         | $       | 11,706,417 | ​ | ​ | ​ | ​ | $ | (1,841,546) | ​ | ​ |
| Realized gain (loss) on investments and U.S. Treasury Bills                                 | ​ | ​ | ​                         | ​ | 609,031      | ​                         | ​ | ​ | ​                         | ​ | 59,792 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Net change in unrealized appreciation (depreciation) on investments and U.S. Treasury Bills | ​ | ​ | ​                         | ​ | (9,416,462)  | ​                         | ​ | ​ | ​                         | ​ | (8,693) | ​ | ​ | ​ | ​ | ​ | 405,251 | ​ | ​ |
| Net increase (decrease) in net assets resulting from operations                             | ​ | ​ | ​                         | ​ | 27,646,400   | ​                         | ​ | ​ | ​                         | ​ | 11,757,516 | ​ | ​ | ​ | ​ | ​ | (1,436,295) | ​ | ​ |
| Distributions to shareholders from:                                                         | ​ | ​ | ​                         | ​ | ​      | ​                         | ​ | ​ | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Dividends paid to shareholders                                                              | ​ | ​ | ​                         | ​ | (40,651,334) | ​                         | ​ | ​ | ​                         | ​ | (7,283,810) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Total distributions to shareholders                                                         | ​ | ​ | ​                         | ​ | (40,651,334) | ​                         | ​ | ​ | ​                         | ​ | (7,283,810) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Capital share transactions                                                                  | ​ | ​ | ​                         | ​ | ​      | ​                         | ​ | ​ | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Issuance of common stock                                                                    | ​ | ​ | ​                         | ​ | 190,000,000  | ​                         | ​ | ​ | ​                         | ​ | 30,000,000 | ​ | ​ | ​ | ​ | ​ | 125,000,000 | ​ | ​ |
| Issuance of common stock under dividend reinvestment plan                                   | ​ | ​ | ​                         | ​ | 32,458,787   | ​                         | ​ | ​ | ​                         | ​ | 5,855,312 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Offering costs                                                                              | ​ | ​ | ​                         | ​ | (510,027)    | ​                         | ​ | ​ | ​                         | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Net increase in net assets resulting from capital share transactions                        | ​ | ​ | ​                         | ​ | 221,948,760  | ​                         | ​ | ​ | ​                         | ​ | 35,855,312 | ​ | ​ | ​ | ​ | ​ | 125,000,000 | ​ | ​ |
| Total increase in net assets                                                                | ​ | ​ | ​                         | ​ | 208,943,826  | ​                         | ​ | ​ | ​                         | ​ | 40,329,018 | ​ | ​ | ​ | ​ | ​ | 123,563,705 | ​ | ​ |
| Net assets at beginning of year                                                             | ​ | ​ | ​                         | ​ | 167,369,395  | ​                         | ​ | ​ | ​                         | ​ | 127,040,377 | ​ | ​ | ​ | ​ | ​ | 3,476,672 | ​ | ​ |
| Net assets at end of year                                                                   | ​ | ​ | ​                         | $       | 376,313,221  | ​                         | ​ | ​ | ​                         | $       | 167,369,395 | ​ | ​ | ​ | ​ | $ | 127,040,377 | ​ | ​ |
| Capital share activity                                                                      | ​ | ​ | ​                         | ​ | ​      | ​                         | ​ | ​ | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Shares issued                                                                               | ​ | ​ | ​                         | ​ | 14,754,619   | ​                         | ​ | ​ | ​                         | ​ | 2,388,261 | ​ | ​ | ​ | ​ | ​ | 8,333,334 | ​ | ​ |
| Shares outstanding at beginning of year                                                     | ​ | ​ | ​                         | ​ | 11,056,595   | ​                         | ​ | ​ | ​                         | ​ | 8,668,334 | ​ | ​ | ​ | ​ | ​ | 335,000 | ​ | ​ |
| Shares outstanding at end of year                                                           | ​ | ​ | ​                         | ​ | 25,811,214   | ​                         | ​ | ​ | ​                         | ​ | 11,056,595 | ​ | ​ | ​ | ​ | ​ | 8,668,334 | ​ | ​ |

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| ​                                                                                                                            | ​ | ​ | Year EndedDecember 31,2019 | ​ | ​       | Year EndedDecember 31,2018 | ​ | ​ | Year EndedDecember 31,2017 | ​ |
|------------------------------------------------------------------------------------------------------------------------------------|---------|---------|---------------------------------|---------|---------------|---------------------------------|---------|---------|---------------------------------|---------|
| Cash flows from operating activities                                                                                               | ​ | ​ | ​                         | ​ | ​       | ​                         | ​ | ​ | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Net increase (decrease) in net assets resulting from operations                                                                    | ​ | ​ | ​                         | $       | 27,646,400    | ​                         | ​ | ​ | ​                         | $       | 11,757,516 | ​ | ​ | ​ | ​ | $ | (1,436,295) | ​ | ​ |
| Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash used in operating activities: | ​ | ​ | ​                         | ​ | ​       | ​                         | ​ | ​ | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Purchase of investments                                                                                                            | ​ | ​ | ​                         | ​ | (241,669,802) | ​                         | ​ | ​ | ​                         | ​ | (168,111,471) | ​ | ​ | ​ | ​ | ​ | (67,005,037) | ​ | ​ |
| Purchase of U.S. Treasury Bills                                                                                                    | ​ | ​ | ​                         | ​ | (315,836,640) | ​                         | ​ | ​ | ​                         | ​ | (270,444,962) | ​ | ​ | ​ | ​ | ​ | (156,977,177) | ​ | ​ |
| Payment in-kind interest                                                                                                           | ​ | ​ | ​                         | ​ | (1,329,413)   | ​                         | ​ | ​ | ​                         | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Sale or maturity of investments                                                                                                    | ​ | ​ | ​                         | ​ | 102,938,909   | ​                         | ​ | ​ | ​                         | ​ | 16,752,528 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Sale or maturity of U.S. Treasury Bills                                                                                            | ​ | ​ | ​                         | ​ | 295,955,273   | ​                         | ​ | ​ | ​                         | ​ | 262,989,682 | ​ | ​ | ​ | ​ | ​ | 87,500,000 | ​ | ​ |
| Realized gain on non-control/non-affiliate investments, including U.S. Treasury Bills                                              | ​ | ​ | ​                         | ​ | (609,031)     | ​                         | ​ | ​ | ​                         | ​ | (59,792) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Net change in unrealized (appreciation) depreciation on non-control/non-affiliate investments, including U.S. Tresury Bills        | ​ | ​ | ​                         | ​ | 9,416,462     | ​                         | ​ | ​ | ​                         | ​ | 8,693 | ​ | ​ | ​ | ​ | ​ | (405,251) | ​ | ​ |
| Amortization of fixed income premiums or discounts                                                                                 | ​ | ​ | ​                         | ​ | (13,021,775)  | ​                         | ​ | ​ | ​                         | ​ | (4,621,487) | ​ | ​ | ​ | ​ | ​ | (834,194) | ​ | ​ |
| Amortization of deferred credit facility fees                                                                                      | ​ | ​ | ​                         | ​ | 236,981       | ​                         | ​ | ​ | ​                         | ​ | 82,648 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Changes in operating assets and liabilities:                                                                                       | ​ | ​ | ​                         | ​ | ​       | ​                         | ​ | ​ | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Accrued interest receivable                                                                                                        | ​ | ​ | ​                         | ​ | (720,008)     | ​                         | ​ | ​ | ​                         | ​ | (890,568) | ​ | ​ | ​ | ​ | ​ | (330,926) | ​ | ​ |
| Other accounts receivable                                                                                                          | ​ | ​ | ​                         | ​ | 20,231        | ​                         | ​ | ​ | ​                         | ​ | (16,006) | ​ | ​ | ​ | ​ | ​ | (25,154) | ​ | ​ |
| Prepaid expenses                                                                                                                   | ​ | ​ | ​                         | ​ | (45,837)      | ​                         | ​ | ​ | ​                         | ​ | (23,615) | ​ | ​ | ​ | ​ | ​ | (11,352) | ​ | ​ |
| Payable for securities purchased                                                                                                   | ​ | ​ | ​                         | ​ | (80,699)      | ​                         | ​ | ​ | ​                         | ​ | (18,915,011) | ​ | ​ | ​ | ​ | ​ | 18,995,710 | ​ | ​ |
| Deferred revenue                                                                                                                   | ​ | ​ | ​                         | ​ | (100,000)     | ​                         | ​ | ​ | ​                         | ​ | 100,000 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Accrued incentive fees                                                                                                             | ​ | ​ | ​                         | ​ | 2,511,421     | ​                         | ​ | ​ | ​                         | ​ | 1,071,566 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Due to portfolio company                                                                                                           | ​ | ​ | ​                         | ​ | —       | ​                         | ​ | ​ | ​                         | ​ | (3,000,000) | ​ | ​ | ​ | ​ | ​ | 3,000,000 | ​ | ​ |
| Due to affiliate                                                                                                                   | ​ | ​ | ​                         | ​ | (35,160)      | ​                         | ​ | ​ | ​                         | ​ | 104,743 | ​ | ​ | ​ | ​ | ​ | (636,851) | ​ | ​ |
| Interest payable                                                                                                                   | ​ | ​ | ​                         | ​ | 336,075       | ​                         | ​ | ​ | ​                         | ​ | 163,981 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Accrued expenses and other liabilities                                                                                             | ​ | ​ | ​                         | ​ | 810,978       | ​                         | ​ | ​ | ​                         | ​ | 121,000 | ​ | ​ | ​ | ​ | ​ | 207,483 | ​ | ​ |
| Net cash used in operating activities                                                                                              | ​ | ​ | ​                         | ​ | (133,575,635) | ​                         | ​ | ​ | ​                         | ​ | (173,033,420) | ​ | ​ | ​ | ​ | ​ | (117,959,044) | ​ | ​ |
| Cash flows from financing activities                                                                                               | ​ | ​ | ​                         | ​ | ​       | ​                         | ​ | ​ | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Deferred offering costs                                                                                                            | ​ | ​ | ​                         | ​ | 102,865       | ​                         | ​ | ​ | ​                         | ​ | (102,865) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Deferred credit facility fees                                                                                                      | ​ | ​ | ​                         | ​ | (1,086,129)   | ​                         | ​ | ​ | ​                         | ​ | (212,407) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Borrowings under credit facilities                                                                                                 | ​ | ​ | ​                         | ​ | 162,250,000   | ​                         | ​ | ​ | ​                         | ​ | 74,500,000 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Repayments under credit facilities                                                                                                 | ​ | ​ | ​                         | ​ | (160,750,000) | ​                         | ​ | ​ | ​                         | ​ | (15,000,000) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Proceeds from reverse repurchase agreements                                                                                        | ​ | ​ | ​                         | ​ | 289,385,422   | ​                         | ​ | ​ | ​                         | ​ | 79,560,129 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Repayments of reverse repurchase agreements                                                                                        | ​ | ​ | ​                         | ​ | (294,351,749) | ​                         | ​ | ​ | ​                         | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Dividends paid to shareholders                                                                                                     | ​ | ​ | ​                         | ​ | (8,192,544)   | ​                         | ​ | ​ | ​                         | ​ | (1,428,498) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Offering costs                                                                                                                     | ​ | ​ | ​                         | ​ | (510,027)     | ​                         | ​ | ​ | ​                         | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Net cash received from common stock issued                                                                                         | ​ | ​ | ​                         | ​ | 190,000,000   | ​                         | ​ | ​ | ​                         | ​ | 30,000,000 | ​ | ​ | ​ | ​ | ​ | 125,060,783 | ​ | ​ |
| Net cash provided by financing activities                                                                                          | ​ | ​ | ​                         | ​ | 176,847,833   | ​                         | ​ | ​ | ​                         | ​ | 167,419,224 | ​ | ​ | ​ | ​ | ​ | 125,060,783 | ​ | ​ |
| Net increase (decrease) in cash                                                                                                    | ​ | ​ | ​                         | ​ | 43,272,198    | ​                         | ​ | ​ | ​                         | ​ | (5,614,196) | ​ | ​ | ​ | ​ | ​ | 7,101,739 | ​ | ​ |
| Cash and cash equivalents at beginning of year                                                                                     | ​ | ​ | ​                         | ​ | 2,527,474     | ​                         | ​ | ​ | ​                         | ​ | 8,141,670 | ​ | ​ | ​ | ​ | ​ | 1,039,931 | ​ | ​ |
| Cash and cash equivalents at end of year                                                                                           | ​ | ​ | ​                         | $       | 45,799,672    | ​                         | ​ | ​ | ​                         | $       | 2,527,474 | ​ | ​ | ​ | ​ | $ | 8,141,670 | ​ | ​ |
| Supplemental and non-cash financing information                                                                                    | ​ | ​ | ​                         | ​ | ​       | ​                         | ​ | ​ | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Taxes paid                                                                                                                         | ​ | ​ | ​                         | $       | 183,510       | ​                         | ​ | ​ | ​                         | $       | 3,272 | ​ | ​ | ​ | ​ | $ | 3,414 | ​ | ​ |
| Interest paid                                                                                                                      | ​ | ​ | ​                         | ​ | 850,391       | ​                         | ​ | ​ | ​                         | ​ | 368,751 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Non-cash dividend reinvestments                                                                                                    | ​ | ​ | ​                         | ​ | 32,458,787    | ​                         | ​ | ​ | ​                         | ​ | 5,855,312 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |

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TABLE OF CONTENTS​

| Portfolio Companies                         | ​ | ​ | Sub-Industry                              | ​ | ​ | Investment Description(1),(5),(6),(11)                                               | ​ | ​ | AcquisitionDate | ​ | ​ | Principal/​Shares | ​ | ​    | Cost    | ​ | ​ | Fair Value(2) | ​ | ​    | % ofNet Assets | ​ |
|---------------------------------------------|---------|---------|-------------------------------------------|---------|---------|--------------------------------------------------------------------------------------|---------|---------|-----------------|---------|---------|-------------------------|---------|------------|---------|---------|---------|---------------|---------|------------|----------------|---------|
| Non-control/non-affiliate investments       | ​ |
| Senior Secured Term Loans                   | ​ |
| Aginity, Inc.                               | ​ | ​ | Application Software                      | ​ | ​ | Tranche I: LIBOR+10.5% PIK, 11.50% floor, 5% ETP, due 2/15/2020(4),(8),(12)          | ​ | ​ | 5/25/2018       | ​ | ​ | ​                 | $       | 7,386,026  | ​ | ​ | ​ | ​       | $       | 7,232,349  | ​        | ​ | ​ | ​ | $ | 2,511,589 | ​ | ​ | ​ | ​ | ​ | 0.67% | ​ | ​ |
| ​                                     | ​ | ​ | ​                                   | ​ | ​ | Tranche II: LIBOR+10.5% PIK, 11.50% floor, Extension line, due 2/15/2020(4),(8),(12) | ​ | ​ | 7/25/2019       | ​ | ​ | ​                 | ​ | 2,000,000  | ​ | ​ | ​ | ​       | ​ | 2,000,000  | ​        | ​ | ​ | ​ | ​ | 1,800,000 | ​ | ​ | ​ | ​ | ​ | 0.48 | ​ | ​ |
| Aria Systems, Inc.                          | ​ | ​ | Application Software                      | ​ | ​ | LIBOR+9.0%, 11.35% floor, 4.5% ETP, due 12/15/2021                                   | ​ | ​ | 6/29/2018       | ​ | ​ | ​                 | ​ | 25,000,000 | ​ | ​ | ​ | ​       | ​ | 25,016,698 | ​        | ​ | ​ | ​ | ​ | 24,863,442 | ​ | ​ | ​ | ​ | ​ | 6.61 | ​ | ​ |
| Brilliant Earth, LLC                        | ​ | ​ | Internet Retail                           | ​ | ​ | LIBOR+8.25%, 10.40% floor, 4.5% ETP, due 4/15/2023                                   | ​ | ​ | 9/30/2019       | ​ | ​ | ​                 | ​ | 35,000,000 | ​ | ​ | ​ | ​       | ​ | 33,795,605 | ​        | ​ | ​ | ​ | ​ | 33,795,605 | ​ | ​ | ​ | ​ | ​ | 8.98 | ​ | ​ |
| CareCloud Corporation                       | ​ | ​ | Healthcare Technology                     | ​ | ​ | Prime+7.0%, 11.75% floor, 3.5% ETP, due 6/15/2022                                    | ​ | ​ | 6/19/2018       | ​ | ​ | ​                 | ​ | 25,000,000 | ​ | ​ | ​ | ​       | ​ | 24,994,734 | ​        | ​ | ​ | ​ | ​ | 23,320,627 | ​ | ​ | ​ | ​ | ​ | 6.20 | ​ | ​ |
| Circadence Corporation                      | ​ | ​ | Application Software                      | ​ | ​ | LIBOR+9.50%, 12.0% floor, 6% ETP, due 12/15/2022                                     | ​ | ​ | 12/20/2018      | ​ | ​ | ​                 | ​ | 18,000,000 | ​ | ​ | ​ | ​       | ​ | 15,038,641 | ​        | ​ | ​ | ​ | ​ | 15,485,065 | ​ | ​ | ​ | ​ | ​ | 4.11 | ​ | ​ |
| Cloud Passage, Inc.                         | ​ | ​ | Data Processing & Outsourced Services | ​ | ​ | LIBOR+7.50%, 1% PIK, 10.00% floor, 2.75% ETP, due 6/13/2023(4)                       | ​ | ​ | 6/13/2019       | ​ | ​ | ​                 | ​ | 7,538,624  | ​ | ​ | ​ | ​       | ​ | 7,280,486  | ​        | ​ | ​ | ​ | ​ | 7,280,486 | ​ | ​ | ​ | ​ | ​ | 1.93 | ​ | ​ |
| Dejero Labs Inc.                            | ​ | ​ | Data Processing & Outsourced Services | ​ | ​ | LIBOR+9.25%, 11.75% floor, 4.5% ETP, due 5/31/2023(3),(7)                            | ​ | ​ | 5/31/2019       | ​ | ​ | ​                 | ​ | 11,000,000 | ​ | ​ | ​ | ​       | ​ | 10,797,612 | ​        | ​ | ​ | ​ | ​ | 10,797,612 | ​ | ​ | ​ | ​ | ​ | 2.87 | ​ | ​ |
| Dtex Systems, Inc.                          | ​ | ​ | Application Software                      | ​ | ​ | LIBOR+10.65% PIK, 13% floor, 4.875% ETP, due 11/15/2021                              | ​ | ​ | 6/1/2018        | ​ | ​ | ​                 | ​ | 8,130,147  | ​ | ​ | ​ | ​       | ​ | 8,233,588  | ​        | ​ | ​ | ​ | ​ | 8,436,559 | ​ | ​ | ​ | ​ | ​ | 2.24 | ​ | ​ |
| Echo 360 Holdings, Inc.                     | ​ | ​ | Education Services                        | ​ | ​ | Tranche I: LIBOR+9.25%, 12.05% floor, 4.0% ETP, due 5/3/2023                         | ​ | ​ | 5/3/2019        | ​ | ​ | ​                 | ​ | 14,000,000 | ​ | ​ | ​ | ​       | ​ | 13,773,561 | ​        | ​ | ​ | ​ | ​ | 13,773,561 | ​ | ​ | ​ | ​ | ​ | 3.66 | ​ | ​ |
| ​                                     | ​ | ​ | ​                                   | ​ | ​ | Tranche II: LIBOR+9.25%, 12.05% floor, 4.0% ETP, due 5/3/2023                        | ​ | ​ | 5/3/2019        | ​ | ​ | ​                 | ​ | 3,000,000  | ​ | ​ | ​ | ​       | ​ | 2,973,193  | ​        | ​ | ​ | ​ | ​ | 2,970,709 | ​ | ​ | ​ | ​ | ​ | 0.79 | ​ | ​ |
| eSilicon Corporation                        | ​ | ​ | Semiconductors                            | ​ | ​ | Tranche I: LIBOR+10.50%, 13% floor, 5% ETP, due 7/15/2020                            | ​ | ​ | 7/31/2017       | ​ | ​ | ​                 | ​ | 2,916,667  | ​ | ​ | ​ | ​       | ​ | 3,323,305  | ​        | ​ | ​ | ​ | ​ | 3,442,998 | ​ | ​ | ​ | ​ | ​ | 0.91 | ​ | ​ |
| ​                                     | ​ | ​ | ​                                   | ​ | ​ | Tranche II: LIBOR+10.50%, 13% floor, 5% ETP, due 1/15/2021                           | ​ | ​ | 2/8/2018        | ​ | ​ | ​                 | ​ | 2,708,333  | ​ | ​ | ​ | ​       | ​ | 2,886,855  | ​        | ​ | ​ | ​ | ​ | 2,982,784 | ​ | ​ | ​ | ​ | ​ | 0.79 | ​ | ​ |
| ​                                     | ​ | ​ | ​                                   | ​ | ​ | Tranche III: LIBOR+10.50%, 13% floor, 5% ETP, due 6/15/2020                          | ​ | ​ | 6/21/2019       | ​ | ​ | ​                 | ​ | 10,000,000 | ​ | ​ | ​ | ​       | ​ | 10,177,163 | ​        | ​ | ​ | ​ | ​ | 11,063,021 | ​ | ​ | ​ | ​ | ​ | 2.94 | ​ | ​ |
| ​                                     | ​ | ​ | ​                                   | ​ | ​ | Tranche IV: Prime+2.75%, Revolving line, due 6/15/2020                               | ​ | ​ | 6/21/2019       | ​ | ​ | ​                 | ​ | 11,000,000 | ​ | ​ | ​ | ​       | ​ | 11,000,000 | ​        | ​ | ​ | ​ | ​ | 10,590,278 | ​ | ​ | ​ | ​ | ​ | 2.81 | ​ | ​ |
| INRIX, Inc.                                 | ​ | ​ | Internet Software and Services            | ​ | ​ | Tranche I: LIBOR+8.0%, 10.5% floor, 2.5% ETP, due 7/15/2023                          | ​ | ​ | 7/26/2019       | ​ | ​ | ​                 | ​ | 20,000,000 | ​ | ​ | ​ | ​       | ​ | 19,600,991 | ​        | ​ | ​ | ​ | ​ | 19,600,991 | ​ | ​ | ​ | ​ | ​ | 5.21 | ​ | ​ |
| ​                                     | ​ | ​ | ​                                   | ​ | ​ | Tranche I: LIBOR+8.0%, 10.5% floor, 2.5% ETP, due 7/15/2023                          | ​ | ​ | 7/26/2019       | ​ | ​ | ​                 | ​ | 5,000,000  | ​ | ​ | ​ | ​       | ​ | 4,703,249  | ​        | ​ | ​ | ​ | ​ | 4,703,249 | ​ | ​ | ​ | ​ | ​ | 1.25 | ​ | ​ |
| Longtail Ad Solutions, Inc. (dba JW Player) | ​ | ​ | Internet Software and Services            | ​ | ​ | LIBOR+8.75%. 10.75% Floor, 3% ETP, due 6/15/2023                                     | ​ | ​ | 12/12/2019      | ​ | ​ | ​                 | ​ | 25,000,000 | ​ | ​ | ​ | ​       | ​ | 24,655,194 | ​        | ​ | ​ | ​ | ​ | 24,655,194 | ​ | ​ | ​ | ​ | ​ | 6.55 | ​ | ​ |
| Massdrop Inc.                               | ​ | ​ | Computer & Electronics Retail         | ​ | ​ | LIBOR+8.25%, 10.65% floor, 4% ETP, due 1/15/2023                                     | ​ | ​ | 7/22/2019       | ​ | ​ | ​                 | ​ | 17,500,000 | ​ | ​ | ​ | ​       | ​ | 17,220,865 | ​        | ​ | ​ | ​ | ​ | 17,220,865 | ​ | ​ | ​ | ​ | ​ | 4.58 | ​ | ​ |
| MingleHealth Care Solutions, Inc.           | ​ | ​ | Healthcare Technology                     | ​ | ​ | LIBOR+9.5%, 11.75% floor, 4% ETP, due 8/15/2022(12)                                  | ​ | ​ | 8/15/2019       | ​ | ​ | ​                 | ​ | 6,000,000  | ​ | ​ | ​ | ​       | ​ | 5,783,543  | ​        | ​ | ​ | ​ | ​ | 5,417,339 | ​ | ​ | ​ | ​ | ​ | 1.44 | ​ | ​ |

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TABLE OF CONTENTS

| Portfolio Companies                               | ​ | ​ | Sub-Industry                                   | ​ | ​ | Investment Description(1),(5),(6),(11)                                                        | ​ | ​ | AcquisitionDate | ​ | ​ | Principal/​Shares | ​ | ​    | Cost    | ​ | ​     | Fair Value(2) | ​ | ​    | % ofNet Assets | ​ |
|---------------------------------------------------|---------|---------|------------------------------------------------|---------|---------|-----------------------------------------------------------------------------------------------|---------|---------|-----------------|---------|---------|-------------------------|---------|------------|---------|---------|-------------|---------------|---------|------------|----------------|---------|
| Non-control/non-affiliate investments (continued) | ​ |
| Senior Secured Term Loans (continued)             | ​ |
| Mojix, Inc.                                       | ​ | ​ | Application Software                           | ​ | ​ | Tranche I: LIBOR+12% PIK, 11.00% floor, 5% ETP, due 5/15/2021                                 | ​ | ​ | 5/16/2017       | ​ | ​ | ​                 | $       | 6,296,833  | ​ | ​ | ​     | ​       | $       | 6,191,982  | ​        | ​ | ​ | ​ | $ | 4,726,334 | ​ | ​ | ​ | ​ | ​ | 1.26% | ​ | ​ |
| ​                                           | ​ | ​ | ​                                        | ​ | ​ | Tranche II: LIBOR+12% PIK, 11.00% floor, 5% ETP, due 5/15/2021                                | ​ | ​ | 8/3/2017        | ​ | ​ | ​                 | ​ | 2,098,944  | ​ | ​ | ​     | ​       | ​ | 2,067,505  | ​        | ​ | ​ | ​ | ​ | 1,575,445 | ​ | ​ | ​ | ​ | ​ | 0.42 | ​ | ​ |
| ​                                           | ​ | ​ | ​                                        | ​ | ​ | Tranche III: LIBOR+12% PIK, 11.00% floor, 5% ETP, due 5/15/2021                               | ​ | ​ | 7/6/2018        | ​ | ​ | ​                 | ​ | 524,206    | ​ | ​ | ​     | ​       | ​ | 518,864    | ​        | ​ | ​ | ​ | ​ | 393,914 | ​ | ​ | ​ | ​ | ​ | 0.10 | ​ | ​ |
| ​                                           | ​ | ​ | ​                                        | ​ | ​ | Tranche IV: LIBOR+12% PIK, 11.00% floor, 5% ETP, due 5/15/2021                                | ​ | ​ | 9/5/2018        | ​ | ​ | ​                 | ​ | 523,474    | ​ | ​ | ​     | ​       | ​ | 516,902    | ​        | ​ | ​ | ​ | ​ | 392,469 | ​ | ​ | ​ | ​ | ​ | 0.10 | ​ | ​ |
| ​                                           | ​ | ​ | ​                                        | ​ | ​ | Tranche V: LIBOR+12% PIK, 11.00% floor, 5% ETP, due 5/15/2021                                 | ​ | ​ | 1/28/2019       | ​ | ​ | ​                 | ​ | 1,042,472  | ​ | ​ | ​     | ​       | ​ | 1.020,642  | ​        | ​ | ​ | ​ | ​ | 782,469 | ​ | ​ | ​ | ​ | ​ | 0.21 | ​ | ​ |
| ​                                           | ​ | ​ | ​                                        | ​ | ​ | Tranche VI: LIBOR+12% PIK, 11.00% floor, due 1/31/2020                                        | ​ | ​ | 12/18/2019      | ​ | ​ | ​                 | ​ | 1,000,000  | ​ | ​ | ​     | ​       | ​ | 1,000,000  | ​        | ​ | ​ | ​ | ​ | 1,000,000 | ​ | ​ | ​ | ​ | ​ | 0.27 | ​ | ​ |
| 3DNA Corp.(dba NationBuilder)                     | ​ | ​ | Application Software                           | ​ | ​ | Tranche I: LIBOR+9.00%, 11.50% floor, 5% ETP, due 4/28/2022                                   | ​ | ​ | 12/28/2019      | ​ | ​ | ​                 | ​ | 7,000,000  | ​ | ​ | ​     | ​       | ​ | 7,016,888  | ​        | ​ | ​ | ​ | ​ | 6,942,703 | ​ | ​ | ​ | ​ | ​ | 1.84 | ​ | ​ |
| ​                                           | ​ | ​ | ​                                        | ​ | ​ | Tranche II: LIBOR+9.00%, 11.50% floor, 5% ETP, due 4/28/2022                                  | ​ | ​ | 6/12/2019       | ​ | ​ | ​                 | ​ | 500,000    | ​ | ​ | ​     | ​       | ​ | 502,374    | ​        | ​ | ​ | ​ | ​ | 497,063 | ​ | ​ | ​ | ​ | ​ | 0.13 | ​ | ​ |
| Ouster, Inc.                                      | ​ | ​ | Technology Hardware, Storage & Peripherals | ​ | ​ | LIBOR+8.50%, 10.75% floor, 3.50% ETP, due 5/15/2021                                           | ​ | ​ | 11/27/2018      | ​ | ​ | ​                 | ​ | 10,000,000 | ​ | ​ | ​     | ​       | ​ | 10,007,056 | ​        | ​ | ​ | ​ | ​ | 10,007,056 | ​ | ​ | ​ | ​ | ​ | 2.66 | ​ | ​ |
| Pivot3, Inc.                                      | ​ | ​ | Data Processing & Outsourced Services      | ​ | ​ | LIBOR+8.50%, 11.00% floor, 4% ETP, due 11/15/2022                                             | ​ | ​ | 5/13/2019       | ​ | ​ | ​                 | ​ | 20,000,000 | ​ | ​ | ​     | ​       | ​ | 19,863,175 | ​        | ​ | ​ | ​ | ​ | 19,728,122 | ​ | ​ | ​ | ​ | ​ | 5.24 | ​ | ​ |
| RealWear, Inc.                                    | ​ | ​ | Technology Hardware, Storage & Peripherals | ​ | ​ | LIBOR+8%, 10.35% floor, 5% ETP, due 6/28/2023                                                 | ​ | ​ | 6/28/2018       | ​ | ​ | ​                 | ​ | 25,000,000 | ​ | ​ | ​     | ​       | ​ | 24,653,512 | ​        | ​ | ​ | ​ | ​ | 24,653,512 | ​ | ​ | ​ | ​ | ​ | 6.55 | ​ | ​ |
| Scale Computing, Inc.                             | ​ | ​ | System Software                                | ​ | ​ | LIBOR+9.25%, 11.75% floor, 4.5% ETP, due 9/15/2022                                            | ​ | ​ | 3/29/2019       | ​ | ​ | ​                 | ​ | 15,000,000 | ​ | ​ | ​     | ​       | ​ | 14,798,210 | ​        | ​ | ​ | ​ | ​ | 14,418,842 | ​ | ​ | ​ | ​ | ​ | 3.83 | ​ | ​ |
| ShareThis, Inc.                                   | ​ | ​ | Data Processing & Outsourced Services      | ​ | ​ | Tranche I: LIBOR+9.25%, 11.60% floor, 5% ETP, due 6/15/2022                                   | ​ | ​ | 12/3/2018       | ​ | ​ | ​                 | ​ | 19,250,000 | ​ | ​ | ​     | ​       | ​ | 18,123,758 | ​        | ​ | ​ | ​ | ​ | 18,123,758 | ​ | ​ | ​ | ​ | ​ | 4.82 | ​ | ​ |
| ​                                           | ​ | ​ | ​                                        | ​ | ​ | Tranche II: LIBOR+9.25%, 11.60% floor, 5% ETP, due 6/15/2022                                  | ​ | ​ | 1/17/2019       | ​ | ​ | ​                 | ​ | 750,000    | ​ | ​ | ​     | ​       | ​ | 699,312    | ​        | ​ | ​ | ​ | ​ | 699,312 | ​ | ​ | ​ | ​ | ​ | 0.19 | ​ | ​ |
| ​                                           | ​ | ​ | ​                                        | ​ | ​ | Tranche III: LIBOR+9.25%, 11.60% floor, 5% ETP, due 6/15/2022                                 | ​ | ​ | 7/24/2019       | ​ | ​ | ​                 | ​ | 1,000,000  | ​ | ​ | ​     | ​       | ​ | 917,457    | ​        | ​ | ​ | ​ | ​ | 917,457 | ​ | ​ | ​ | ​ | ​ | 0.25 | ​ | ​ |
| Total Senior Secured Term Loans                   | ​ | ​ | ​                                        | ​ | ​ | ​                                                                                       | ​ | ​ | ​         | ​ | ​ | ​                 | ​ | ​    | ​ | ​ | 358,385,089 | ​       | ​ | ​    | ​        | ​ | 349,570,424 | ​ | ​ | ​ | ​ | ​ | 92.89 | ​ | ​ |
| Preferred Stock(8)                                | ​ |
| Aria Systems, Inc.                                | ​ | ​ | Application Software                           | ​ | ​ | Series G Preferred Stock                                                                 | ​ | ​ | 7/10/2018       | ​ | ​ | ​                 | ​ | 289,419    | ​ | ​ | ​     | ​       | ​ | 250,000    | ​        | ​ | ​ | ​ | ​ | 437,515 | ​ | ​ | ​ | ​ | ​ | 0.12 | ​ | ​ |
| Warrants(8)                                       | ​ |
| Aginity, Inc.                                     | ​ | ​ | Application Software                           | ​ | ​ | Warrant for Series A Preferred Stock, exercise price $1.949/share, expires 5/25/2028(12) | ​ | ​ | 5/25/2018       | ​ | ​ | ​                 | ​ | 359,158    | ​ | ​ | ​     | ​       | ​ | 167,727    | ​        | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| ​                                           | ​ | ​ | ​                                        | ​ | ​ | Warrant for Series A-1 Preferred Stock, exercise price $0.01/share, expires 2/25/2029    | ​ | ​ | 2/25/2019       | ​ | ​ | ​                 | ​ | 205,234    | ​ | ​ | ​     | ​       | ​ | 151,873    | ​        | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |

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TABLE OF CONTENTS

| Portfolio Companies                               | ​ | ​ | Sub-Industry                              | ​ | ​ | Investment Description(1),(5),(6),(11)                                                           | ​ | ​ | AcquisitionDate | ​ | ​ | Principal/​Shares | ​ | ​   | Cost    | ​ | ​ | Fair Value(2) | ​ | ​   | % ofNet Assets | ​ |
|---------------------------------------------------|---------|---------|-------------------------------------------|---------|---------|--------------------------------------------------------------------------------------------------|---------|---------|-----------------|---------|---------|-------------------------|---------|-----------|---------|---------|---------|---------------|---------|-----------|----------------|---------|
| Non-control/non-affiliate investments (continued) | ​ |
| Warrants(8) (continued)                           | ​ |
| AllClear ID, Inc.                                 | ​ | ​ | Specialized Consumer Services             | ​ | ​ | Warrant for Common Stock, exercise price $0.01/share, expires 9/1/2027                           | ​ | ​ | 9/1/2017        | ​ | ​ | ​                 | $       | 870,514   | ​ | ​ | ​ | ​       | $       | 1,749,733 | ​        | ​ | ​ | ​ | $ | 906,205 | ​ | ​ | ​ | ​ | ​ | 0.24% | ​ | ​ |
| Aria Systems, Inc.                                | ​ | ​ | Application Software                      | ​ | ​ | Warrant for Series G Preferred Stock, exercise price $0.8638/share, expires 6/29/2028       | ​ | ​ | 6/29/2018       | ​ | ​ | ​                 | ​ | 2,170,641 | ​ | ​ | ​ | ​       | ​ | 770,578   | ​        | ​ | ​ | ​ | ​ | 2,633,681 | ​ | ​ | ​ | ​ | ​ | 0.69 | ​ | ​ |
| Aspen Group Inc.                                  | ​ | ​ | Education Services                        | ​ | ​ | Warrant for Common Stock, exercise price $6.87/share, expires 7/25/2022                          | ​ | ​ | 7/25/2017       | ​ | ​ | ​                 | ​ | 224,174   | ​ | ​ | ​ | ​       | ​ | 583,301   | ​        | ​ | ​ | ​ | ​ | 631,000 | ​ | ​ | ​ | ​ | ​ | 0.17 | ​ | ​ |
| Brilliant Earth, LLC                              | ​ | ​ | Internet Retail                           | ​ | ​ | Warrant for Class P Units, exercise price $5.25/share, expires 9/30/2029                    | ​ | ​ | 9/30/2019       | ​ | ​ | ​                 | ​ | 333,333   | ​ | ​ | ​ | ​       | ​ | 973,000   | ​        | ​ | ​ | ​ | ​ | 955,667 | ​ | ​ | ​ | ​ | ​ | 0.25 | ​ | ​ |
| CareCloud Corporation                             | ​ | ​ | Healthcare Technology                     | ​ | ​ | Warrant for Series A-1 Preferred Stock, exercise price $0.8287/share, expires 6/16/2025     | ​ | ​ | 4/17/2019       | ​ | ​ | ​                 | ​ | 2,262,579 | ​ | ​ | ​ | ​       | ​ | 394,163   | ​        | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Circadence Corporation                            | ​ | ​ | Application Software                      | ​ | ​ | Warrant for Series A-5 Preferred Stock, exercise price $1.08/share, expires 12/20/2028      | ​ | ​ | 12/20/2018      | ​ | ​ | ​                 | ​ | 1,666,667 | ​ | ​ | ​ | ​       | ​ | 3,630,000 | ​        | ​ | ​ | ​ | ​ | 3,393,522 | ​ | ​ | ​ | ​ | ​ | 0.90 | ​ | ​ |
| ​                                           | ​ | ​ | ​                                   | ​ | ​ | Warrant for Series A-5 Preferred Stock, exercise price $1.08/share, expires 10/31/2029      | ​ | ​ | 10/31/2019      | ​ | ​ | ​                 | ​ | 416,667   | ​ | ​ | ​ | ​       | ​ | 845,540   | ​        | ​ | ​ | ​ | ​ | 848,380 | ​ | ​ | ​ | ​ | ​ | 0.22 | ​ | ​ |
| Cloud Passage, Inc.                               | ​ | ​ | Data Processing & Outsourced Services | ​ | ​ | Warrant for Series D-1 Preferred Stock, exercise price $1.60/share, expires 6/13/2029       | ​ | ​ | 6/13/2019       | ​ | ​ | ​                 | ​ | 210,938   | ​ | ​ | ​ | ​       | ​ | 273,798   | ​        | ​ | ​ | ​ | ​ | 266,626 | ​ | ​ | ​ | ​ | ​ | 0.07 | ​ | ​ |
| Dejero Labs Inc.                                  | ​ | ​ | Data Processing & Outsourced Services | ​ | ​ | Warrant for Common Stock, exercise price $0.01/share, expires 5/31/2029(3),(7)                   | ​ | ​ | 5/31/2019       | ​ | ​ | ​                 | ​ | 333,621   | ​ | ​ | ​ | ​       | ​ | 192,499   | ​        | ​ | ​ | ​ | ​ | 198,664 | ​ | ​ | ​ | ​ | ​ | 0.05 | ​ | ​ |
| Dtex Systems, Inc.                                | ​ | ​ | Application Software                      | ​ | ​ | Warrant for Series C-Prime Preferred Stock, exercise price $0.6000/share, expires 6/1/2025  | ​ | ​ | 6/1/2018        | ​ | ​ | ​                 | ​ | 500,000   | ​ | ​ | ​ | ​       | ​ | 59,000    | ​        | ​ | ​ | ​ | ​ | 57,500 | ​ | ​ | ​ | ​ | ​ | 0.02 | ​ | ​ |
| ​                                           | ​ | ​ | ​                                   | ​ | ​ | Warrant for Series C-Prime Preferred Stock, exercise price $0.6000/share, expires 7/11/2026 | ​ | ​ | 7/11/2019       | ​ | ​ | ​                 | ​ | 833,333   | ​ | ​ | ​ | ​       | ​ | 114,719   | ​        | ​ | ​ | ​ | ​ | 115,000 | ​ | ​ | ​ | ​ | ​ | 0.03 | ​ | ​ |
| Echo 360 Holdings, Inc.                           | ​ | ​ | Education Services                        | ​ | ​ | Warrant for Series E Preferred Stock, exercise price $1.5963/share, expires 5/3/2029        | ​ | ​ | 5/3/2019        | ​ | ​ | ​                 | ​ | 1,066,767 | ​ | ​ | ​ | ​       | ​ | 299,762   | ​        | ​ | ​ | ​ | ​ | 318,963 | ​ | ​ | ​ | ​ | ​ | 0.08 | ​ | ​ |
| eSilicon Corporation                              | ​ | ​ | Semiconductors                            | ​ | ​ | Warrant for Series H Preferred Stock, exercise price $1.01/share, expires 7/31/2027         | ​ | ​ | 7/31/2017       | ​ | ​ | ​                 | ​ | 1,485,149 | ​ | ​ | ​ | ​       | ​ | 543,564   | ​        | ​ | ​ | ​ | ​ | 2,249,999 | ​ | ​ | ​ | ​ | ​ | 0.60 | ​ | ​ |
| ​                                           | ​ | ​ | ​                                   | ​ | ​ | Warrant for Series H Preferred Stock, exercise price $1.01/share, expires 6/21/2029         | ​ | ​ | 6/21/2019       | ​ | ​ | ​                 | ​ | 990,099   | ​ | ​ | ​ | ​       | ​ | 312,871   | ​        | ​ | ​ | ​ | ​ | 500,000 | ​ | ​ | ​ | ​ | ​ | 0.13 | ​ | ​ |
| INRIX, Inc.                                       | ​ | ​ | Internet Software and Services            | ​ | ​ | Warrant for Common Stock, exercise price $9.29/share, expires 7/26/2029                          | ​ | ​ | 7/26/2019       | ​ | ​ | ​                 | ​ | 150,804   | ​ | ​ | ​ | ​       | ​ | 522,083   | ​        | ​ | ​ | ​ | ​ | 475,485 | ​ | ​ | ​ | ​ | ​ | 0.13 | ​ | ​ |
| Longtail Ad Solutions, Inc. (dba JW Player)       | ​ | ​ | Internet Software and Services            | ​ | ​ | Warrant for Common Stock, exercise price $1.49/share, expires 12/12/2029                         | ​ | ​ | 12/12/2019      | ​ | ​ | ​                 | ​ | 332,997   | ​ | ​ | ​ | ​       | ​ | 38,800    | ​        | ​ | ​ | ​ | ​ | 38,800 | ​ | ​ | ​ | ​ | ​ | 0.01 | ​ | ​ |

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TABLE OF CONTENTS

| Portfolio Companies                               | ​ | ​ | Sub-Industry                                   | ​ | ​ | Investment Description(1),(5),(6),(11)                                                          | ​ | ​ | AcquisitionDate | ​ | ​ | Principal/​Shares | ​ | ​   | Cost    | ​ | ​ | Fair Value(2) | ​ | ​   | % ofNet Assets | ​ |
|---------------------------------------------------|---------|---------|------------------------------------------------|---------|---------|-------------------------------------------------------------------------------------------------|---------|---------|-----------------|---------|---------|-------------------------|---------|-----------|---------|---------|---------|---------------|---------|-----------|----------------|---------|
| Non-control/non-affiliate investments (continued) | ​ |
| Warrants(8) (continued)                           | ​ |
| Massdrop Inc.                                     | ​ | ​ | Computer & Electronics Retail              | ​ | ​ | Warrant for B Series Preferred Stock, exercise price $1.1938/share, expires 7/22/2019      | ​ | ​ | 7/22/2019       | ​ | ​ | ​                 | $       | 848,093   | ​ | ​ | ​ | ​       | $       | 183,188   | ​        | ​ | ​ | ​ | $ | 190,821 | ​ | ​ | ​ | ​ | ​ | 0.05% | ​ | ​ |
| MingleHealth Care Solutions, Inc.                 | ​ | ​ | Healthcare Technology                          | ​ | ​ | Warrant for Series AA Preferred Stock, exercise price $0.24/share, expires 8/15/2028       | ​ | ​ | 8/15/2018       | ​ | ​ | ​                 | ​ | 1,625,000 | ​ | ​ | ​ | ​       | ​ | 492,375   | ​        | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Mojix, Inc.                                       | ​ | ​ | Application Software                           | ​ | ​ | Warrant for Common Stock exercise price $10.64/share, expires 5/16/2027                         | ​ | ​ | 5/16/2017       | ​ | ​ | ​                 | ​ | 164,427   | ​ | ​ | ​ | ​       | ​ | 417,645   | ​        | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| ​                                           | ​ | ​ | ​                                        | ​ | ​ | Warrant for Series 1 Preferred Stock, exercise price $0.28/share, expires 12/20/2028       | ​ | ​ | 12/20/2018      | ​ | ​ | ​                 | ​ | 7,176,973 | ​ | ​ | ​ | ​       | ​ | 806,991   | ​        | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| ​                                           | ​ | ​ | ​                                        | ​ | ​ | Warrant for Series 1 Preferred Stock exercise price $0.28/share, expires 5/30/2029         | ​ | ​ | 5/30/2019       | ​ | ​ | ​                 | ​ | 358,849   | ​ | ​ | ​ | ​       | ​ | 21,531    | ​        | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| ​                                           | ​ | ​ | ​                                        | ​ | ​ | Warrant for Series 1 Preferred Stock exercise price $0.28/share, expires 12/17/2029        | ​ | ​ | 12/17/2029      | ​ | ​ | ​                 | ​ | 358,849   | ​ | ​ | ​ | ​       | ​ | —   | ​        | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| 3DNA Corp.(dba NationBuilder)                     | ​ | ​ | Application Software                           | ​ | ​ | Warrant for Series C-1 Preferred Stock, exercise price $1.4643/share, expires 12/28/2028   | ​ | ​ | 12/28/2018      | ​ | ​ | ​                 | ​ | 273,164   | ​ | ​ | ​ | ​       | ​ | 104,138   | ​        | ​ | ​ | ​ | ​ | 87,959 | ​ | ​ | ​ | ​ | ​ | 0.02 | ​ | ​ |
| Ouster, Inc.                                      | ​ | ​ | Technology Hardware, Storage & Peripherals | ​ | ​ | Warrant for Series A Preferred Stock, exercise price $11.3158/share, expires 11/27/2028    | ​ | ​ | 11/27/2018      | ​ | ​ | ​                 | ​ | .53,023   | ​ | ​ | ​ | ​       | ​ | 103,010   | ​        | ​ | ​ | ​ | ​ | 134,837 | ​ | ​ | ​ | ​ | ​ | 0.04 | ​ | ​ |
| Pivot3, Inc.                                      | ​ | ​ | Data Processing & Outsourced Services      | ​ | ​ | Warrant for Series D Preferred Stock, exercise price $0.59/share, expires 5/13/2029        | ​ | ​ | 5/13/2029       | ​ | ​ | ​                 | ​ | 2,033,898 | ​ | ​ | ​ | ​       | ​ | 216,610   | ​        | ​ | ​ | ​ | ​ | 141,966 | ​ | ​ | ​ | ​ | ​ | 0.04 | ​ | ​ |
| RealWear, Inc.                                    | ​ | ​ | Technology Hardware, Storage & Peripherals | ​ | ​ | Warrant for Series A Preferred Stock, exercise price $4.4464/share, expires 10/5/2028      | ​ | ​ | 10/5/2018       | ​ | ​ | ​                 | ​ | 112,451   | ​ | ​ | ​ | ​       | ​ | 135,841   | ​        | ​ | ​ | ​ | ​ | 393,129 | ​ | ​ | ​ | ​ | ​ | 0.10 | ​ | ​ |
| ​                                           | ​ | ​ | ​                                        | ​ | ​ | Warrant for Series A Preferred Stock, exercise price $4.4464/share, expires 12/28/2028     | ​ | ​ | 12/28/2018      | ​ | ​ | ​                 | ​ | 22,491    | ​ | ​ | ​ | ​       | ​ | 25,248    | ​        | ​ | ​ | ​ | ​ | 78,628 | ​ | ​ | ​ | ​ | ​ | 0.02 | ​ | ​ |
| ​                                           | ​ | ​ | ​                                        | ​ | ​ | Warrant Series A Preferred Stock, exercise price $6.78/share, expires 6/27/2029            | ​ | ​ | 6/27/2019       | ​ | ​ | ​                 | ​ | 123,894   | ​ | ​ | ​ | ​       | ​ | 380,850   | ​        | ​ | ​ | ​ | ​ | 336,372 | ​ | ​ | ​ | ​ | ​ | 0.09 | ​ | ​ |
| Scale Computing, Inc.                             | ​ | ​ | System Software                                | ​ | ​ | Warrant for Series F-1 Preferred Stock, exercise price $0.8031/share, expires 3/29/2029    | ​ | ​ | 3/29/2019       | ​ | ​ | ​                 | ​ | 2,147,926 | ​ | ​ | ​ | ​       | ​ | 345,816   | ​        | ​ | ​ | ​ | ​ | 317,893 | ​ | ​ | ​ | ​ | ​ | 0.08 | ​ | ​ |
| SendtoNews Video, Inc.                            | ​ | ​ | Advertising                                    | ​ | ​ | Warrant for Class B Non-Voting Stock, exercise price $0.67/share, expires 6/30/2027(3),(7) | ​ | ​ | 6/30/2017       | ​ | ​ | ​                 | ​ | 191,500   | ​ | ​ | ​ | ​       | ​ | 246,461   | ​        | ​ | ​ | ​ | ​ | 58,000 | ​ | ​ | ​ | ​ | ​ | 0.02 | ​ | ​ |
| ShareThis Inc.                                    | ​ | ​ | Data Processing & Outsourced Services      | ​ | ​ | Warrant for Series D-3 Preferred Stock, exercise price $2.4320/share, expires 12/3/2028    | ​ | ​ | 12/3/2018       | ​ | ​ | ​                 | ​ | 647,615   | ​ | ​ | ​ | ​       | ​ | 2,162,000 | ​        | ​ | ​ | ​ | ​ | 2,162,000 | ​ | ​ | ​ | ​ | ​ | 0.57 | ​ | ​ |

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TABLE OF CONTENTS

| Portfolio Companies                               | ​ | ​ | Sub-Industry                                   | ​ | ​ | Investment Description(1),(5),(6),(11)                                                    | ​ | ​ | AcquisitionDate | ​ | ​ | Principal/​Shares | ​ | ​   | Cost    | ​ | ​     | Fair Value(2) | ​ | ​     | % ofNet Assets | ​ |
|---------------------------------------------------|---------|---------|------------------------------------------------|---------|---------|-------------------------------------------------------------------------------------------|---------|---------|-----------------|---------|---------|-------------------------|---------|-----------|---------|---------|-------------|---------------|---------|-------------|----------------|---------|
| Non-control/non-affiliate investments (continued) | ​ |
| Warrants(8) (continued)                           | ​ |
| zSpace, Inc.                                      | ​ | ​ | Technology Hardware, Storage & Peripherals | ​ | ​ | Warrant for Series E Preferred Stock, exercise price $0.90/share, expires 12/29/2027 | ​ | ​ | 12/29/2017      | ​ | ​ | ​                 | $       | 1,896,966 | ​ | ​ | ​     | ​       | $       | 707,568     | ​        | ​ | ​ | ​ | $ | 208,595 | ​ | ​ | ​ | ​ | ​ | 0.07% | ​ | ​ |
| ​                                           | ​ | ​ | ​                                        | ​ | ​ | Warrant for Series E Preferred Stock, exercise price $0.90/share, expires 2/11/2029  | ​ | ​ | 2/11/2019       | ​ | ​ | ​                 | $       | 2,806,830 | ​ | ​ | ​     | ​       | ​ | 411,528     | ​        | ​ | ​ | ​ | ​ | 308,645 | ​ | ​ | ​ | ​ | ​ | 0.07 | ​ | ​ |
| Total Warrants                                    | ​ | ​ | ​                                        | ​ | ​ | ​                                                                                   | ​ | ​ | ​         | ​ | ​ | ​                 | ​ | ​   | ​ | ​ | ​     | ​       | ​ | 18,383,811  | ​        | ​ | ​ | ​ | ​ | 18,008,337 | ​ | ​ | ​ | ​ | ​ | 4.78 | ​ | ​ |
| Total non-control/non-affiliate investments       | ​ | ​ | ​                                        | ​ | ​ | ​                                                                                   | ​ | ​ | ​         | ​ | ​ | ​                 | ​ | ​   | ​ | ​ | 377,018,900 | ​       | ​ | ​     | ​        | ​ | 368,016,276 | ​ | ​ | ​ | ​ | ​ | 97.67 | ​ | ​ |
| U.S. Treasury                                     | ​ | ​ | ​                                        | ​ | ​ | U.S. Treasury Bill, 1.33%, due 1/7/2020(10)                                               | ​ | ​ | ​         | ​ | ​ | ​                 | ​ | ​   | ​ | ​ | ​     | ​       | ​ | 74,983,437  | ​        | ​ | ​ | ​ | ​ | 74,966,770 | ​ | ​ | ​ | ​ | ​ | 19.92 | ​ | ​ |
| ​                                           | ​ | ​ | ​                                        | ​ | ​ | U.S. Treasury Bill, 0.97%, due 1/2/2020                                                   | ​ | ​ | ​         | ​ | ​ | ​                 | ​ | ​   | ​ | ​ | ​     | ​       | ​ | 24,999,328  | ​        | ​ | ​ | ​ | ​ | 24,998,653 | ​ | ​ | ​ | ​ | ​ | 6.64 | ​ | ​ |
| Total U.S.Treasury                                | ​ | ​ | ​                                        | ​ | ​ | ​                                                                                   | ​ | ​ | ​         | ​ | ​ | ​                 | ​ | ​   | ​ | ​ | ​     | ​       | ​ | 99,982,765  | ​        | ​ | ​ | ​ | ​ | 99,965,423 | ​ | ​ | ​ | ​ | ​ | 26.56 | ​ | ​ |
| Total Investments                                 | ​ | ​ | ​                                        | ​ | ​ | ​                                                                                   | ​ | ​ | ​         | ​ | ​ | ​                 | ​ | ​   | ​ | ​ | ​     | ​       | $       | 477,001,665 | ​        | ​ | ​ | ​ | $ | 467,981,699 | ​ | ​ | ​ | ​ | ​ | 124.36% | ​ | ​ |
| ​                                           |

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TABLE OF CONTENTS

| ​                     | ​ | ​ | December 31, 2019   | ​ |
|-----------------------------|---------|---------|--------------------------|---------|
| Geographic Region           | ​ | ​ | Investments atFair Value | ​ | ​ | Percentage ofNet Assets | ​ |
| Western United States       | ​ | ​ | ​                  | $       | 226,473,356 | ​ | ​ | ​ | ​ | ​ | 60.19% | ​ | ​ |
| Northwestern United States  | ​ | ​ | ​                  | ​ | 50,241,366 | ​ | ​ | ​ | ​ | ​ | 13.35 | ​ | ​ |
| Southeastern United States  | ​ | ​ | ​                  | ​ | 23,320,627 | ​ | ​ | ​ | ​ | ​ | 6.20 | ​ | ​ |
| South Central United States | ​ | ​ | ​                  | ​ | 20,776,293 | ​ | ​ | ​ | ​ | ​ | 5.52 | ​ | ​ |
| Midwestern United States    | ​ | ​ | ​                  | ​ | 19,048,324 | ​ | ​ | ​ | ​ | ​ | 5.06 | ​ | ​ |
| Northeastern United States  | ​ | ​ | ​                  | ​ | 17,102,034 | ​ | ​ | ​ | ​ | ​ | 4.54 | ​ | ​ |
| Canada                      | ​ | ​ | ​                  | ​ | 11,054,276 | ​ | ​ | ​ | ​ | ​ | 2.94 | ​ | ​ |
| Total                       | ​ | ​ | ​                  | $       | 368,016,276 | ​ | ​ | ​ | ​ | ​ | 97.80% | ​ | ​ |
| ​                     |
| ​                                        | ​ | ​ | December 31, 2019   | ​ |
|------------------------------------------------|---------|---------|--------------------------|---------|
| Industry                                       | ​ | ​ | Investments atFair Value | ​ | ​ | Percentage ofNet Assets | ​ |
| Application Software                           | ​ | ​ | ​                  | $       | 101,674,597 | ​ | ​ | ​ | ​ | ​ | 27.02% | ​ | ​ |
| Data Processing & Outsourced Services      | ​ | ​ | ​                  | ​ | 60,316,003 | ​ | ​ | ​ | ​ | ​ | 16.03 | ​ | ​ |
| Technology Hardware, Storage & Peripherals | ​ | ​ | ​                  | ​ | 36,120,776 | ​ | ​ | ​ | ​ | ​ | 9.60 | ​ | ​ |
| Internet Retail                                | ​ | ​ | ​                  | ​ | 34,751,272 | ​ | ​ | ​ | ​ | ​ | 9.23 | ​ | ​ |
| Semiconductors                                 | ​ | ​ | ​                  | ​ | 30,829,079 | ​ | ​ | ​ | ​ | ​ | 8.19 | ​ | ​ |
| Healthcare Technology                          | ​ | ​ | ​                  | ​ | 28,737,966 | ​ | ​ | ​ | ​ | ​ | 7.64 | ​ | ​ |
| Internet Software & Services               | ​ | ​ | ​                  | ​ | 24,779,724 | ​ | ​ | ​ | ​ | ​ | 6.58 | ​ | ​ |
| Education Services                             | ​ | ​ | ​                  | ​ | 17,694,233 | ​ | ​ | ​ | ​ | ​ | 4.70 | ​ | ​ |
| Computer & Electronics Retail              | ​ | ​ | ​                  | ​ | 17,411,686 | ​ | ​ | ​ | ​ | ​ | 4.63 | ​ | ​ |
| System Software                                | ​ | ​ | ​                  | ​ | 14,736,735 | ​ | ​ | ​ | ​ | ​ | 3.92 | ​ | ​ |
| Specialized Consumer Services                  | ​ | ​ | ​                  | ​ | 906,205 | ​ | ​ | ​ | ​ | ​ | 0.24 | ​ | ​ |
| Advertising                                    | ​ | ​ | ​                  | ​ | 58,000 | ​ | ​ | ​ | ​ | ​ | 0.02 | ​ | ​ |
| Total                                          | ​ | ​ | ​                  | $       | 368,016,276 | ​ | ​ | ​ | ​ | ​ | 97.80% | ​ | ​ |

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TABLE OF CONTENTS

| Portfolio Companies                   | ​ | ​ | Sub-Industry                                  | ​ | ​ | Investment Description(1),(5),(6),(11),(13)                                     | ​ | ​ | AcquisitionDate | ​ | ​ | Principal/​Shares | ​ | ​    | Cost    | ​ | ​ | Fair Value(2) | ​ | ​    | % ofNet Assets | ​ |
|---------------------------------------|---------|---------|-----------------------------------------------|---------|---------|---------------------------------------------------------------------------------|---------|---------|-----------------|---------|---------|-------------------------|---------|------------|---------|---------|---------|---------------|---------|------------|----------------|---------|
| Non-control/non-affiliate investments | ​ |
| Senior Secured Term Loans             | ​ |
| Aginity, Inc.                         | ​ | ​ | Application Software                          | ​ | ​ | LIBOR+9.5%, 11.5% floor,5% ETP, due 5/25/2022                                   | ​ | ​ | 5/25/2018       | ​ | ​ | ​                 | $       | 7,000,000  | ​ | ​ | ​ | ​       | $       | 6,795,581  | ​        | ​ | ​ | ​ | $ | 6,675,922 | ​ | ​ | ​ | ​ | ​ | 3.99% | ​ | ​ |
| AllClear ID, Inc.                     | ​ | ​ | Specialized ConsumerServices                  | ​ | ​ | Tranche I: LIBOR+10.75%,12.25% floor, 5% ETP, due8/15/2021                      | ​ | ​ | 9/1/2017        | ​ | ​ | ​                 | ​ | 10,000,00  | ​ | ​ | ​ | ​       | ​ | 9,545,594  | ​        | ​ | ​ | ​ | ​ | 9,841,798 | ​ | ​ | ​ | ​ | ​ | 5.88 | ​ | ​ |
| ​                               | ​ | ​ | ​                                       | ​ | ​ | Tranche II: LIBOR+8.50%,10.00% floor, 5% ETP, due8/15/2021                      | ​ | ​ | 10/17/2018      | ​ | ​ | ​                 | ​ | 5,000,000  | ​ | ​ | ​ | ​       | ​ | 4,342,367  | ​        | ​ | ​ | ​ | ​ | 4,920,899 | ​ | ​ | ​ | ​ | ​ | 2.94 | ​ | ​ |
| Aria Systems, Inc.                    | ​ | ​ | Application Software                          | ​ | ​ | LIBOR+9.0%, 11.35% floor,4% ETP, due 12/15/2021                                 | ​ | ​ | 6/29/2018       | ​ | ​ | ​                 | ​ | 25,000,000 | ​ | ​ | ​ | ​       | ​ | 24,305,208 | ​        | ​ | ​ | ​ | ​ | 24,212,998 | ​ | ​ | ​ | ​ | ​ | 14.46 | ​ | ​ |
| CareCloud Corporation                 | ​ | ​ | Healthcare Technology                         | ​ | ​ | Prime+7.0%, 11.75% floor,3.5% ETP, due 6/15/2022                                | ​ | ​ | 6/19/2018       | ​ | ​ | ​                 | ​ | 25,000,000 | ​ | ​ | ​ | ​       | ​ | 24,570,129 | ​        | ​ | ​ | ​ | ​ | 24,123,158 | ​ | ​ | ​ | ​ | ​ | 14.41 | ​ | ​ |
| Circadence Corporation                | ​ | ​ | Application Software                          | ​ | ​ | LIBOR+9.50%, 12.0% floor,5% ETP, due 6/20/2022                                  | ​ | ​ | 12/20/2018      | ​ | ​ | ​                 | ​ | 18,000,000 | ​ | ​ | ​ | ​       | ​ | 14,239,085 | ​        | ​ | ​ | ​ | ​ | 14,239,085 | ​ | ​ | ​ | ​ | ​ | 8.51 | ​ | ​ |
| Drawbridge, Inc.                      | ​ | ​ | Data Processing & Outsourced Services     | ​ | ​ | LIBOR+9.0%, 11.25% floor,4% ETP, due 10/22/2022                                 | ​ | ​ | 10/22/2018      | ​ | ​ | ​                 | ​ | 15,000,000 | ​ | ​ | ​ | ​       | ​ | 14,467,708 | ​        | ​ | ​ | ​ | ​ | 14,467,708 | ​ | ​ | ​ | ​ | ​ | 8.64 | ​ | ​ |
| Dtex Systems, Inc.                    | ​ | ​ | Application Software                          | ​ | ​ | LIBOR+9.15%, 11.5% floor,11.5% cash cap, 4% ETP, due 11/15/2021                 | ​ | ​ | 6/1/2018        | ​ | ​ | ​                 | ​ | 8,000,000  | ​ | ​ | ​ | ​       | ​ | 7,938,983  | ​        | ​ | ​ | ​ | ​ | 7,887,407 | ​ | ​ | ​ | ​ | ​ | 4.71 | ​ | ​ |
| eSilicon Corporation                  | ​ | ​ | Semiconductors                                | ​ | ​ | Tranche I: LIBOR+10.5%,11.5% floor, 5% ETP, due 7/15/2020                       | ​ | ​ | 7/31/2017       | ​ | ​ | ​                 | ​ | 7,916,667  | ​ | ​ | ​ | ​       | ​ | 7,976,198  | ​        | ​ | ​ | ​ | ​ | 8,227,697 | ​ | ​ | ​ | ​ | ​ | 4.92 | ​ | ​ |
| ​                               | ​ | ​ | ​                                       | ​ | ​ | Tranche II: LIBOR+10.5%,11.5% floor, 5% ETP, due 1/15/2021                      | ​ | ​ | 2/8/2018        | ​ | ​ | ​                 | ​ | 5,000,000  | ​ | ​ | ​ | ​       | ​ | 5,063,065  | ​        | ​ | ​ | ​ | ​ | 5,196,440 | ​ | ​ | ​ | ​ | ​ | 3.10 | ​ | ​ |
| Jibe, Inc.                            | ​ | ​ | Application Software                          | ​ | ​ | LIBOR+10.0%, 12.25% floor,5% ETP, due 6/7/2022                                  | ​ | ​ | 6/7/2018        | ​ | ​ | ​                 | ​ | 7,000,000  | ​ | ​ | ​ | ​       | ​ | 6,951,535  | ​        | ​ | ​ | ​ | ​ | 6,951,535 | ​ | ​ | ​ | ​ | ​ | 4.15 | ​ | ​ |
| MingleHealth Care Solutions, Inc.     | ​ | ​ | Healthcare Technology                         | ​ | ​ | LIBOR+9.5%, 11.75% floor,4% ETP, due 8/15/2022                                  | ​ | ​ | 8/15/2018       | ​ | ​ | ​                 | ​ | 6,000,000  | ​ | ​ | ​ | ​       | ​ | 5,532,093  | ​        | ​ | ​ | ​ | ​ | 5,532,093 | ​ | ​ | ​ | ​ | ​ | 3.31 | ​ | ​ |
| Mobius Imaging, LLC                   | ​ | ​ | Healthcare Technology                         | ​ | ​ | LIBOR+9.25%, 11% floor,4% ETP, due 10/15/2022                                   | ​ | ​ | 11/23/2018      | ​ | ​ | ​                 | ​ | 15,500,000 | ​ | ​ | ​ | ​       | ​ | 13,551,386 | ​        | ​ | ​ | ​ | ​ | 13,551,386 | ​ | ​ | ​ | ​ | ​ | 8.10 | ​ | ​ |
| Mojix, Inc.                           | ​ | ​ | Application Software                          | ​ | ​ | Tranche I: LIBOR+10.5%,11% floor, 12.0% cash cap,5% ETP, due 5/15/2021(4),(9)   | ​ | ​ | 5/16/2017       | ​ | ​ | ​                 | ​ | 6,034,383  | ​ | ​ | ​ | ​       | ​ | 5,514,492  | ​        | ​ | ​ | ​ | ​ | 5,200,452 | ​ | ​ | ​ | ​ | ​ | 3.11 | ​ | ​ |
| ​                               | ​ | ​ | ​                                       | ​ | ​ | Tranche II: LIBOR+10.5%,11% floor, 12.0% cash cap,5% ETP, due 5/15/2021(4),(9)  | ​ | ​ | 8/3/2017        | ​ | ​ | ​                 | ​ | 2,011,462  | ​ | ​ | ​ | ​       | ​ | 1,845,251  | ​        | ​ | ​ | ​ | ​ | 1,733,484 | ​ | ​ | ​ | ​ | ​ | 1.04 | ​ | ​ |
| ​                               | ​ | ​ | ​                                       | ​ | ​ | Tranche III: LIBOR+10.5%,11% floor, 12.0% cash cap,5% ETP, due 5/15/2021(4),(9) | ​ | ​ | 7/6/2018        | ​ | ​ | ​                 | ​ | 502,357    | ​ | ​ | ​ | ​       | ​ | 465,516    | ​        | ​ | ​ | ​ | ​ | 432,933 | ​ | ​ | ​ | ​ | ​ | 0.26 | ​ | ​ |
| ​                               | ​ | ​ | ​                                       | ​ | ​ | Tranche IV: LIBOR+10.5%,11% floor, 12.0% cash cap,5% ETP, due 5/15/2021(4),(9)  | ​ | ​ | 9/5/2018        | ​ | ​ | ​                 | ​ | 501,656    | ​ | ​ | ​ | ​       | ​ | 462,652    | ​        | ​ | ​ | ​ | ​ | 432,329 | ​ | ​ | ​ | ​ | ​ | 0.26 | ​ | ​ |
| 3DNA Corp.(dba NationBuilder)         | ​ | ​ | Application Software                          | ​ | ​ | LIBOR+9%, 11.5% floor,5% ETP, due 4/28/2022                                     | ​ | ​ | 12/28/2018      | ​ | ​ | ​                 | ​ | 7,000,000  | ​ | ​ | ​ | ​       | ​ | 6,827,787  | ​        | ​ | ​ | ​ | ​ | 6,827,787 | ​ | ​ | ​ | ​ | ​ | 4.08 | ​ | ​ |
| Ouster, Inc.                          | ​ | ​ | Technology Hardware,Storage & Peripherals | ​ | ​ | LIBOR+8.5%, 10.75% floor,3.5% ETP, due 05/15/2021(14)                           | ​ | ​ | 11/27/2018      | ​ | ​ | ​                 | ​ | 10,000,000 | ​ | ​ | ​ | ​       | ​ | —    | ​        | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |

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TABLE OF CONTENTS

| Portfolio Companies                               | ​ | ​ | Sub-Industry                                  | ​ | ​     | Investment Description(1),(5),(6),(11),(13)                                                       | ​ | ​ | AcquisitionDate | ​ | ​     | Principal/​Shares | ​ | ​    | Cost    | ​ | ​ | Fair Value(2) | ​ | ​    | % ofNet Assets | ​ |
|---------------------------------------------------|---------|---------|-----------------------------------------------|---------|-------------|---------------------------------------------------------------------------------------------------|---------|---------|-----------------|---------|-------------|-------------------------|---------|------------|---------|---------|---------|---------------|---------|------------|----------------|---------|
| Non-control/non-affiliate investments (continued) | ​ |
| Senior Secured Term Loans (continued)             | ​ |
| RealWear, Inc.                                    | ​ | ​ | Technology Hardware,Storage & Peripherals | ​ | ​     | Tranche I: LIBOR+9.5%, 10.85%floor, 5% ETP, due 10/5/2021                                         | ​ | ​ | 10/05/2018      | ​ | ​     | ​                 | $       | 5,000,000  | ​ | ​ | ​ | ​       | $       | 4,854,551  | ​        | ​ | ​ | ​ | $ | 4,832,563 | ​ | ​ | ​ | ​ | ​ | 2.89% | ​ | ​ |
| ​                                           | ​ | ​ | ​                                       | ​ | ​     | Tranche II: LIBOR+9.5%,10.85% floor, 5% ETP, due 10/5/2021                                        | ​ | ​ | 12/28/2018      | ​ | ​     | ​                 | ​ | 1,000,000  | ​ | ​ | ​ | ​       | ​ | 965,139    | ​        | ​ | ​ | ​ | ​ | 966,513 | ​ | ​ | ​ | ​ | ​ | 0.58 | ​ | ​ |
| RedSeal, Inc.                                     | ​ | ​ | Application Software                          | ​ | ​     | LIBOR+9.5%, 11% floor,5.25% ETP, due 12/15/2020                                                   | ​ | ​ | 12/15/2017      | ​ | ​     | ​                 | ​ | 15,000,000 | ​ | ​ | ​ | ​       | ​ | 15,123,353 | ​        | ​ | ​ | ​ | ​ | 15,123,353 | ​ | ​ | ​ | ​ | ​ | 9.04 | ​ | ​ |
| ShareThis, Inc.                                   | ​ | ​ | Data Processing & Outsourced Services     | ​ | ​     | LIBOR+9.25%, 11.65% floor,4% ETP due 5/15/2022                                                    | ​ | ​ | 12/3/2018       | ​ | ​     | ​                 | ​ | 19,250,000 | ​ | ​ | ​ | ​       | ​ | 17,568,105 | ​        | ​ | ​ | ​ | ​ | 17,567,923 | ​ | ​ | ​ | ​ | ​ | 10.50 | ​ | ​ |
| zSpace, Inc.                                      | ​ | ​ | Technology Hardware,Storage & Peripherals | ​ | ​     | LIBOR+10.5%, 12% floor,5% ETP, due 12/29/2020                                                     | ​ | ​ | 12/29/2017      | ​ | ​     | ​                 | ​ | 10,000,000 | ​ | ​ | ​ | ​       | ​ | 9,682,603  | ​        | ​ | ​ | ​ | ​ | 9,593,890 | ​ | ​ | ​ | ​ | ​ | 5.73 | ​ | ​ |
| Total Senior Secured Term Loans                   | ​ | ​ | ​                                       | ​ | 208,588,381 | ​                                                                                           | ​ | ​ | ​         | ​ | 208,539,353 | ​                 | ​ | ​    | ​ | ​ | 124.61  | ​       | ​ |
| Preferred Stock                                   | ​ |
| Aria Systems, Inc.                                | ​ | ​ | Application Software                          | ​ | ​     | Series G Preferred Stock                                                                     | ​ | ​ | 7/10/2018       | ​ | ​     | ​                 | ​ | 289,419    | ​ | ​ | ​ | ​       | ​ | 250,000    | ​        | ​ | ​ | ​ | ​ | 461,826 | ​ | ​ | ​ | ​ | ​ | 0.28 | ​ | ​ |
| Warrants(8)                                       | ​ |
| Aginity, Inc.                                     | ​ | ​ | Application Software                          | ​ | ​     | Warrant for Series C-PrimePreferred Stock, exercise price$1.949/share, expires 5/25/2028     | ​ | ​ | 5/25/2018       | ​ | ​     | ​                 | ​ | 359,158    | ​ | ​ | ​ | ​       | ​ | 167,727    | ​        | ​ | ​ | ​ | ​ | 154,346 | ​ | ​ | ​ | ​ | ​ | 0.09 | ​ | ​ |
| AllClear ID, Inc.                                 | ​ | ​ | Specialized ConsumerServices                  | ​ | ​     | Warrant for Common Stock,exercise price $0.01/share, expires 9/1/2027                             | ​ | ​ | 9/1/2017        | ​ | ​     | ​                 | ​ | 870,514    | ​ | ​ | ​ | ​       | ​ | 1,749,733  | ​        | ​ | ​ | ​ | ​ | 1,176,700 | ​ | ​ | ​ | ​ | ​ | 0.70 | ​ | ​ |
| Aria Systems, Inc.                                | ​ | ​ | Application Software                          | ​ | ​     | Warrant for Series G PreferredStock, exercise price $0.8638/​share, expires 6/29/2028  | ​ | ​ | 6/29/2018       | ​ | ​     | ​                 | ​ | 2,170,641  | ​ | ​ | ​ | ​       | ​ | 770,578    | ​        | ​ | ​ | ​ | ​ | 1,827,680 | ​ | ​ | ​ | ​ | ​ | 1.09 | ​ | ​ |
| Aspen Group Inc.                                  | ​ | ​ | Education Services                            | ​ | ​     | Warrant for Common Stock,exercise price $6.87/share, expires 7/25/2022                            | ​ | ​ | 7/25/2017       | ​ | ​     | ​                 | ​ | 224,174    | ​ | ​ | ​ | ​       | ​ | 583,301    | ​        | ​ | ​ | ​ | ​ | 593,000 | ​ | ​ | ​ | ​ | ​ | 0.35 | ​ | ​ |
| CareCloud Corporation                             | ​ | ​ | Healthcare Technology                         | ​ | ​     | Warrant for Series C PreferredStock, exercise price $1.2035/​share, expires 6/19/2025  | ​ | ​ | 6/19/2018       | ​ | ​     | ​                 | ​ | 1,557,956  | ​ | ​ | ​ | ​       | ​ | 394,163    | ​        | ​ | ​ | ​ | ​ | 364,562 | ​ | ​ | ​ | ​ | ​ | 0.22 | ​ | ​ |
| Circadence Corp.                                  | ​ | ​ | Application Software                          | ​ | ​     | Warrant for Series A-5 PreferredStock, exercise price $1.08/share,expires 12/20/2028         | ​ | ​ | 12/20/2018      | ​ | ​     | ​                 | ​ | 1,666,667  | ​ | ​ | ​ | ​       | ​ | 3,630,000  | ​        | ​ | ​ | ​ | ​ | 3,630,000 | ​ | ​ | ​ | ​ | ​ | 2.18 | ​ | ​ |
| Drawbridge, Inc.                                  | ​ | ​ | Data Processing & Outsourced Services     | ​ | ​     | Warrant for Series C PreferredStock, exercise price $2.2595/​share, expires 10/22/2028 | ​ | ​ | 10/22/2018      | ​ | ​     | ​                 | ​ | 663,864    | ​ | ​ | ​ | ​       | ​ | 406,285    | ​        | ​ | ​ | ​ | ​ | 429,520 | ​ | ​ | ​ | ​ | ​ | 0.26 | ​ | ​ |
| Dtex Systems, Inc.                                | ​ | ​ | Application Software                          | ​ | ​     | Warrant for Series C Preferred Stock, exercise price $0.600/​share, expires 6/1/2025   | ​ | ​ | 6/1/2018        | ​ | ​     | ​                 | ​ | 500,000    | ​ | ​ | ​ | ​       | ​ | 59,000     | ​        | ​ | ​ | ​ | ​ | 56,000 | ​ | ​ | ​ | ​ | ​ | 0.03 | ​ | ​ |
| eSilicon Corporation                              | ​ | ​ | Semiconductors                                | ​ | ​     | Warrant for Series H Preferred Stock, exercise price $1.01/​share, expires 7/31/2027   | ​ | ​ | 7/31/2017       | ​ | ​     | ​                 | ​ | 1,485,149  | ​ | ​ | ​ | ​       | ​ | 543,564    | ​        | ​ | ​ | ​ | ​ | 1,005,446 | ​ | ​ | ​ | ​ | ​ | 0.60 | ​ | ​ |
| Jibe, Inc.                                        | ​ | ​ | Application Software                          | ​ | ​     | Warrant for Series C Preferred Stock, exercise price $2.265/​share, expires 6/7/2028   | ​ | ​ | 6/7/2018        | ​ | ​     | ​                 | ​ | 247,242    | ​ | ​ | ​ | ​       | ​ | 40,795     | ​        | ​ | ​ | ​ | ​ | 35,603 | ​ | ​ | ​ | ​ | ​ | 0.02 | ​ | ​ |
| MingleHealth Care Solutions, Inc.                 | ​ | ​ | Healthcare Technology                         | ​ | ​     | Warrant for Series AA Preferred Stock, exercise price $0.24/​share, expires 8/15/2028  | ​ | ​ | 8/15/2018       | ​ | ​     | ​                 | ​ | 1,625,000  | ​ | ​ | ​ | ​       | ​ | 492,375    | ​        | ​ | ​ | ​ | ​ | 471,913 | ​ | ​ | ​ | ​ | ​ | 0.28 | ​ | ​ |

----

TABLE OF CONTENTS

| Portfolio Companies                               | ​ | ​ | Sub-Industry                                   | ​ | ​     | Investment Description(1),(5),(6),(11),(13)                                                        | ​ | ​ | AcquisitionDate | ​ | ​     | Principal/​Shares | ​ | ​    | Cost    | ​ | ​ | Fair Value(2) | ​ | ​     | % ofNet Assets | ​ |
|---------------------------------------------------|---------|---------|------------------------------------------------|---------|-------------|----------------------------------------------------------------------------------------------------|---------|---------|-----------------|---------|-------------|-------------------------|---------|------------|---------|---------|---------|---------------|---------|-------------|----------------|---------|
| Non-control/non-affiliate investments (continued) | ​ |
| Warrants(8) (continued)                           | ​ |
| Mobius Imaging, LLC                               | ​ | ​ | Healthcare Technology                          | ​ | ​     | Warrant for next round security, exercise price $136/share, expires 11/23/2028                     | ​ | ​ | 11/23/2018      | ​ | ​     | ​                 | $       | 7,123      | ​ | ​ | ​ | ​       | $       | 1,820,000   | ​        | ​ | ​ | ​ | $ | 1,820,000 | ​ | ​ | ​ | ​ | ​ | 1.09% | ​ | ​ |
| Mojix, Inc.                                       | ​ | ​ | Application Software                           | ​ | ​     | Warrants for Common Stock, exercise price $10.64/share, expires 5/16/2027(9),(10)                  | ​ | ​ | 5/16/2017       | ​ | ​     | ​                 | ​ | 164,427    | ​ | ​ | ​ | ​       | ​ | 417,645     | ​        | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 0.00 | ​ | ​ |
| ​                                           | ​ | ​ | ​                                        | ​ | ​     | Warrants for Series 1 Preferred Stock, exercise price $0.28/share, expires 12/20/2028(9),(10) | ​ | ​ | 12/20/2018      | ​ | ​     | ​                 | ​ | 7,176,973  | ​ | ​ | ​ | ​       | ​ | 806,991     | ​        | ​ | ​ | ​ | ​ | 798,389 | ​ | ​ | ​ | ​ | ​ | 0.48 | ​ | ​ |
| 3DNA Corp.(dba NationBuilder)                     | ​ | ​ | Application Software                           | ​ | ​     | Warrant for Series C-1 Preferred Stock, exercise price $1.4643/ share, expires 12/28/2028     | ​ | ​ | 12/28/2018      | ​ | ​     | ​                 | ​ | 273,164    | ​ | ​ | ​ | ​       | ​ | 104,138     | ​        | ​ | ​ | ​ | ​ | 104,138 | ​ | ​ | ​ | ​ | ​ | 0.06 | ​ | ​ |
| Ouster, Inc.                                      | ​ | ​ | Technology Hardware, Storage & Peripherals | ​ | ​     | Warrant for Series A Preferred Stock, exercise price $11.3158/ share, expires 11/27/2028(14)  | ​ | ​ | ​         | ​ | ​     | ​                 | ​ | —    | ​ | ​ | ​ | ​       | ​ | ​     | ​        | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| RealWear, Inc.                                    | ​ | ​ | Technology Hardware, Storage & Peripherals | ​ | ​     | Warrant for Series A Preferred Stock, exercise price $4.4464/ share, expires 10/5/2028        | ​ | ​ | 10/05/2018      | ​ | ​     | ​                 | ​ | 112,451    | ​ | ​ | ​ | ​       | ​ | 135,841     | ​        | ​ | ​ | ​ | ​ | 141,435 | ​ | ​ | ​ | ​ | ​ | 0.08 | ​ | ​ |
| ​                                           | ​ | ​ | ​                                        | ​ | ​     | Warrant for Series A Preferred Stock, exercise price $4.4464/ share, expires 12/28/2028       | ​ | ​ | 12/28/2018      | ​ | ​     | ​                 | ​ | 22,491     | ​ | ​ | ​ | ​       | ​ | 25,248      | ​        | ​ | ​ | ​ | ​ | 28,288 | ​ | ​ | ​ | ​ | ​ | 0.02 | ​ | ​ |
| RedSeal, Inc.                                     | ​ | ​ | Application Software                           | ​ | ​     | Warrant for Series C-Prime Preferred Stock, exercise price $0.27318/share, expires 12/15/2027 | ​ | ​ | 12/15/2017      | ​ | ​     | ​                 | ​ | 3,569,075  | ​ | ​ | ​ | ​       | ​ | 364,046     | ​        | ​ | ​ | ​ | ​ | 292,664 | ​ | ​ | ​ | ​ | ​ | 0.17 | ​ | ​ |
| SendtoNews Video, Inc.                            | ​ | ​ | Advertising                                    | ​ | ​     | Warrant for Class B Non-Voting Stock, exercise price $0.67/share, expires 6/30/2027(3),(7)    | ​ | ​ | 6/30/2017       | ​ | ​     | ​                 | ​ | 191,500    | ​ | ​ | ​ | ​       | ​ | 246,461     | ​        | ​ | ​ | ​ | ​ | 66,000 | ​ | ​ | ​ | ​ | ​ | 0.04 | ​ | ​ |
| ShareThis Inc.                                    | ​ | ​ | Data Processing & Outsourced Services      | ​ | ​     | Warrant for Series D-3 Preferred Stock, exercise price $2.4320/ share, expires 12/3/2028      | ​ | ​ | 12/3/2018       | ​ | ​     | ​                 | ​ | 371,030    | ​ | ​ | ​ | ​       | ​ | 1,548,052   | ​        | ​ | ​ | ​ | ​ | 1,580,000 | ​ | ​ | ​ | ​ | ​ | 0.94 | ​ | ​ |
| zSpace, Inc.                                      | ​ | ​ | Technology Hardware, Storage & Peripherals | ​ | ​     | Warrant for Series E Preferred Stock, exercise price $0.90/share, expires 12/29/2027          | ​ | ​ | 12/29/2017      | ​ | ​     | ​                 | ​ | 1,896,966  | ​ | ​ | ​ | ​       | ​ | 707,568     | ​        | ​ | ​ | ​ | ​ | 671,526 | ​ | ​ | ​ | ​ | ​ | 0.40 | ​ | ​ |
| Total Warrants                                    | ​ | ​ | ​                                        | ​ | ​     | ​                                                                                            | ​ | ​ | ​         | ​ | ​     | ​                 | ​ | ​    | ​ | ​ | ​ | ​       | ​ | 15,013,511  | ​        | ​ | ​ | ​ | ​ | 15,247,210 | ​ | ​ | ​ | ​ | ​ | 9.10 | ​ | ​ |
| Total non-control/non-affiliate investments       | ​ | ​ | ​                                        | ​ | 223,851,892 | ​                                                                                            | ​ | ​ | ​         | ​ | 224,248,389 | ​                 | ​ | ​    | ​ | ​ | 133.99  | ​       | ​ |
| U.S. Treasury                                     | ​ | ​ | ​                                        | ​ | ​     | U.S. Treasury Bill, 2.254%, due 1/3/2019(12)                                                       | ​ | ​ | ​         | ​ | ​     | ​                 | $       | 80,000,000 | ​ | ​ | ​ | ​       | ​ | 79,959,928  | ​        | ​ | ​ | ​ | ​ | 79,959,928 | ​ | ​ | ​ | ​ | ​ | 47.77 | ​ | ​ |
| Total Investments                                 | ​ | ​ | ​                                        | ​ | ​     | ​                                                                                            | ​ | ​ | ​         | ​ | ​     | ​                 | ​ | ​    | ​ | ​ | ​ | ​       | $       | 303,811,820 | ​        | ​ | ​ | ​ | $ | 304,208,317 | ​ | ​ | ​ | ​ | ​ | 181.76% | ​ | ​ |
| ​                                           |

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| ​                     | ​ | ​ | December 31, 2018   | ​ |
|-----------------------------|---------|---------|--------------------------|---------|
| Geographic Region           | ​ | ​ | Investments atFair Value | ​ | ​ | Percentage ofNet Assets | ​ |
| Western United States       | ​ | ​ | ​                  | $       | 154,566,480 | ​ | ​ | ​ | ​ | ​ | 92.36% | ​ | ​ |
| Southeastern United States  | ​ | ​ | ​                  | ​ | 24,487,720 | ​ | ​ | ​ | ​ | ​ | 14.63 | ​ | ​ |
| Northeastern United States  | ​ | ​ | ​                  | ​ | 22,358,524 | ​ | ​ | ​ | ​ | ​ | 13.36 | ​ | ​ |
| South Central United States | ​ | ​ | ​                  | ​ | 15,939,397 | ​ | ​ | ​ | ​ | ​ | 9.52 | ​ | ​ |
| Midwestern United States    | ​ | ​ | ​                  | ​ | 6,830,268 | ​ | ​ | ​ | ​ | ​ | 4.08 | ​ | ​ |
| Canada                      | ​ | ​ | ​                  | ​ | 66,000 | ​ | ​ | ​ | ​ | ​ | 0.04 | ​ | ​ |
| Total                       | ​ | ​ | ​                  | $       | 224,248,389 | ​ | ​ | ​ | ​ | ​ | 133.99% | ​ | ​ |
| ​                     |
| ​                                        | ​ | ​ | December 31, 2018   | ​ |
|------------------------------------------------|---------|---------|--------------------------|---------|
| Industry                                       | ​ | ​ | Investments atFair Value | ​ | ​ | Percentage ofNet Assets | ​ |
| Application Software                           | ​ | ​ | ​                  | $       | 97,077,931 | ​ | ​ | ​ | ​ | ​ | 58.01% | ​ | ​ |
| Healthcare Technology                          | ​ | ​ | ​                  | ​ | 45,863,112 | ​ | ​ | ​ | ​ | ​ | 27.41 | ​ | ​ |
| Data Processing & Outsourced Services      | ​ | ​ | ​                  | ​ | 34,045,151 | ​ | ​ | ​ | ​ | ​ | 20.34 | ​ | ​ |
| Technology Hardware, Storage & Peripherals | ​ | ​ | ​                  | ​ | 16,234,215 | ​ | ​ | ​ | ​ | ​ | 9.70 | ​ | ​ |
| Specialized Consumer Services                  | ​ | ​ | ​                  | ​ | 15,939,397 | ​ | ​ | ​ | ​ | ​ | 9.52 | ​ | ​ |
| Semiconductors                                 | ​ | ​ | ​                  | ​ | 14,429,583 | ​ | ​ | ​ | ​ | ​ | 8.62 | ​ | ​ |
| Education Services                             | ​ | ​ | ​                  | ​ | 593,000 | ​ | ​ | ​ | ​ | ​ | 0.35 | ​ | ​ |
| Advertising                                    | ​ | ​ | ​                  | ​ | 66,000 | ​ | ​ | ​ | ​ | ​ | 0.04 | ​ | ​ |
| Total                                          | ​ | ​ | ​                  | $       | 224,248,389 | ​ | ​ | ​ | ​ | ​ | 133.99% | ​ | ​ |

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| ​                            | ​ | ​ | Year EndedDecember 31,2019 | ​ | ​  | Year EndedDecember 31,2018 | ​ |
|------------------------------------|---------|---------|---------------------------------|---------|----------|---------------------------------|---------|
| Additional paid-in capital         | ​ | ​ | ​                         | $       | (99,549) | ​                         | ​ | ​ | ​ | $ | (183,510) | ​ | ​ |
| Accumulated undistributed earnings | ​ | ​ | ​                         | ​ | 99,549   | ​                         | ​ | ​ | ​ | ​ | 183,510 | ​ | ​ |
| ​                | ​ | ​ | Year EndedDecember 31,2019 | ​ | ​    | Year EndedDecember 31,2018 | ​ |
|------------------------|---------|---------|---------------------------------|---------|------------|---------------------------------|---------|
| Ordinary income        | ​ | ​ | ​                         | $       | 40,651,335 | ​                         | ​ | ​ | ​ | $ | 7,283,810 | ​ | ​ |
| Long-term capital gain | ​ | ​ | ​                         | ​ | —    | ​                         | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Return of capital      | ​ | ​ | ​                         | ​ | —    | ​                         | ​ | ​ | ​ | ​ | — | ​ | ​ |
| ​                                                             | ​ | ​ | December 31,2019 | ​ | ​    | December 31,2018 | ​ |
|---------------------------------------------------------------------|---------|---------|-----------------------|---------|------------|-----------------------|---------|
| Net increase in net assets resulting from operations                | ​ | ​ | ​               | $       | 27,646,400 | ​               | ​ | ​ | ​ | $ | 11,757,516 | ​ | ​ |
| Net change in unrealized appreciation (depreciation) on investments | ​ | ​ | ​               | ​ | 9,416,462  | ​               | ​ | ​ | ​ | ​ | 8,693 | ​ | ​ |
| Other book to tax differences                                       | ​ | ​ | ​               | ​ | 2,940,608  | ​               | ​ | ​ | ​ | ​ | 347,516 | ​ | ​ |
| Taxable income                                                      | ​ | ​ | ​               | ​ | 40,003,470 | ​               | ​ | ​ | ​ | ​ | 12,113,725 | ​ | ​ |
| Distributed during the year                                         | ​ | ​ | ​               | ​ | 35,821,420 | ​               | ​ | ​ | ​ | ​ | 7,283,810 | ​ | ​ |
| Accumulated undistributed earnings on a tax basis                   | ​ | ​ | ​               | $       | 4,182,050  | ​               | ​ | ​ | ​ | $ | 4,829,915 | ​ | ​ |

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| Portfolio Company                            | ​ | ​ | Investment Type          | ​ | ​    | December 31, 2019 | ​ |
|----------------------------------------------|---------|---------|--------------------------|---------|------------|------------------------|---------|
| Aria Systems, Inc.                           | ​ | ​ | Senior Secured Term Loan | ​ | ​    | ​                | $       | 2,500,000 | ​ | ​ |
| Brilliant Earth, LLC                         | ​ | ​ | Senior Secured Term Loan | ​ | ​    | ​                | ​ | 5,000,000 | ​ | ​ |
| CloudPassage, Inc.                           | ​ | ​ | Senior Secured Term Loan | ​ | ​    | ​                | ​ | 2,500,000 | ​ | ​ |
| Dejero Labs, Inc.                            | ​ | ​ | Senior Secured Term Loan | ​ | ​    | ​                | ​ | 4,000,000 | ​ | ​ |
| Dtex Systems, Inc.                           | ​ | ​ | Senior Secured Term Loan | ​ | ​    | ​                | ​ | 7,000,000 | ​ | ​ |
| eSilicon Corporation                         | ​ | ​ | Revolving Line           | ​ | ​    | ​                | ​ | 1,000,000 | ​ | ​ |
| INRIX, Inc.                                  | ​ | ​ | Senior Secured Term Loan | ​ | ​    | ​                | ​ | 8,000,000 | ​ | ​ |
| Longtail Ad Solutions, Inc. (dba JW Player)  | ​ | ​ | Senior Secured Term Loan | ​ | ​    | ​                | ​ | 5,000,000 | ​ | ​ |
| Massdrop, Inc.                               | ​ | ​ | Senior Secured Term Loan | ​ | ​    | ​                | ​ | 5,000,000 | ​ | ​ |
| Total unused commitments to extend financing | ​ | ​ | ​                  | $       | 40,000,000 | ​                | ​ |
| Portfolio Company                            | ​ | ​ | Investment Type          | ​ | ​    | December 31, 2018 | ​ |
|----------------------------------------------|---------|---------|--------------------------|---------|------------|------------------------|---------|
| Aginity, Inc.                                | ​ | ​ | Senior Secured Term Loan | ​ | ​    | ​                | $       | 7,000,000 | ​ | ​ |
| Aria Systems, Inc.                           | ​ | ​ | Senior Secured Term Loan | ​ | ​    | ​                | ​ | 5,000,000 | ​ | ​ |
| Drawbridge, Inc.                             | ​ | ​ | Senior Secured Term Loan | ​ | ​    | ​                | ​ | 3,000,000 | ​ | ​ |
| Dtex Systems, Inc.                           | ​ | ​ | Senior Secured Term Loan | ​ | ​    | ​                | ​ | 7,000,000 | ​ | ​ |
| Mobius Imaging, LLC                          | ​ | ​ | Senior Secured Term Loan | ​ | ​    | ​                | ​ | 4,500,000 | ​ | ​ |
| Mojix, Inc.                                  | ​ | ​ | Senior Secured Term Loan | ​ | ​    | ​                | ​ | 1,000,000 | ​ | ​ |
| 3DNA Corp.(dba NationBuilder, Inc.)          | ​ | ​ | Senior Secured Term Loan | ​ | ​    | ​                | ​ | 3,000,000 | ​ | ​ |
| Ouster, Inc.                                 | ​ | ​ | Senior Secured Term Loan | ​ | ​    | ​                | ​ | 10,000,000 | ​ | ​ |
| ShareThis, Inc.                              | ​ | ​ | Senior Secured Term Loan | ​ | ​    | ​                | ​ | 750,000 | ​ | ​ |
| Total unused commitments to extend financing | ​ | ​ | ​                  | $       | 41,250,000 | ​                | ​ |

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| ​                                                         | ​ | ​ | Year EndedDecember 31,2019 | ​ | ​    | Year EndedDecember 31,2018 | ​ | ​ | Year EndedDecember 31,2017 | ​ |
|-----------------------------------------------------------------|---------|---------|---------------------------------|---------|------------|---------------------------------|---------|---------|---------------------------------|---------|
| Net increase (decrease) in net assets resulting from operations | ​ | ​ | ​                         | $       | 27,646,400 | ​                         | ​ | ​ | ​                         | $       | 11,757,516 | ​ | ​ | ​ | ​ | $ | (1,436,295) | ​ | ​ |
| Per Share Data(1):                                              | ​ | ​ | ​                         | ​ | ​    | ​                         | ​ | ​ | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Weighted-average shares outstanding for period                  | ​ | ​ | ​                         | ​ | ​    | ​                         | ​ | ​ | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Basic                                                           | ​ | ​ | ​                         | ​ | 18,701,021 | ​                         | ​ | ​ | ​                         | ​ | 9,300,960 | ​ | ​ | ​ | ​ | ​ | 2,795,274 | ​ | ​ |
| Diluted                                                         | ​ | ​ | ​                         | ​ | 18,701,021 | ​                         | ​ | ​ | ​                         | ​ | 9,300,960 | ​ | ​ | ​ | ​ | ​ | 2,795,274 | ​ | ​ |
| Basic and diluted income (loss) per common share                | ​ | ​ | ​                         | ​ | ​    | ​                         | ​ | ​ | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Basic                                                           | ​ | ​ | ​                         | $       | 1.48       | ​                         | ​ | ​ | ​                         | $       | 1.26 | ​ | ​ | ​ | ​ | $ | (0.51) | ​ | ​ |
| Diluted                                                         | ​ | ​ | ​                         | $       | 1.48       | ​                         | ​ | ​ | ​                         | $       | 1.26 | ​ | ​ | ​ | ​ | $ | (0.51) | ​ | ​ |
| Issuance Date             | ​ | ​ | Shares Issued | ​ | ​    | Price Per Share | ​ | ​ | Gross Proceeds | ​ |
|---------------------------|---------|---------|---------------|---------|------------|-----------------|---------|---------|----------------|---------|
| October 8, 2015      | ​ | ​ | ​       | ​ | 1,667      | ​         | ​ | ​ | ​        | $       | 15.00 | ​ | ​ | ​ | ​ | $ | 25,000 | ​ | ​ |
| December 22, 2016    | ​ | ​ | ​       | ​ | 333,333    | ​         | ​ | ​ | ​        | ​ | 15.00 | ​ | ​ | ​ | ​ | ​ | 5,000,000 | ​ | ​ |
| April 19, 2017       | ​ | ​ | ​       | ​ | 1,000,000  | ​         | ​ | ​ | ​        | ​ | 15.00 | ​ | ​ | ​ | ​ | ​ | 15,000,000 | ​ | ​ |
| June 26, 2017        | ​ | ​ | ​       | ​ | 1,666,667  | ​         | ​ | ​ | ​        | ​ | 15.00 | ​ | ​ | ​ | ​ | ​ | 25,000,000 | ​ | ​ |
| September 12, 2017   | ​ | ​ | ​       | ​ | 2,666,667  | ​         | ​ | ​ | ​        | ​ | 15.00 | ​ | ​ | ​ | ​ | ​ | 40,000,000 | ​ | ​ |
| December 22, 2017    | ​ | ​ | ​       | ​ | 3,000,000  | ​         | ​ | ​ | ​        | ​ | 15.00 | ​ | ​ | ​ | ​ | ​ | 45,000,000 | ​ | ​ |
| May 31, 2018(1)      | ​ | ​ | ​       | ​ | 70,563     | ​         | ​ | ​ | ​        | ​ | 14.82 | ​ | ​ | ​ | ​ | ​ | 1,045,570 | ​ | ​ |
| August 31, 2018(1)   | ​ | ​ | ​       | ​ | 117,582    | ​         | ​ | ​ | ​        | ​ | 14.92 | ​ | ​ | ​ | ​ | ​ | 1,754,244 | ​ | ​ |
| September 27, 2018   | ​ | ​ | ​       | ​ | 1,997,337  | ​         | ​ | ​ | ​        | ​ | 15.02 | ​ | ​ | ​ | ​ | ​ | 30,000,000 | ​ | ​ |
| November 15, 2018(1) | ​ | ​ | ​       | ​ | 202,779    | ​         | ​ | ​ | ​        | ​ | 15.07 | ​ | ​ | ​ | ​ | ​ | 3,055,498 | ​ | ​ |
| January 14, 2019     | ​ | ​ | ​       | ​ | 4,344,964  | ​         | ​ | ​ | ​        | ​ | 15.19 | ​ | ​ | ​ | ​ | ​ | 66,000,000 | ​ | ​ |
| March 26, 2019(1)    | ​ | ​ | ​       | ​ | 326,431    | ​         | ​ | ​ | ​        | ​ | 15.14 | ​ | ​ | ​ | ​ | ​ | 4,942,168 | ​ | ​ |
| May 21, 2019(1)      | ​ | ​ | ​       | ​ | 374,783    | ​         | ​ | ​ | ​        | ​ | 15.13 | ​ | ​ | ​ | ​ | ​ | 5,670,467 | ​ | ​ |
| May 24, 2019         | ​ | ​ | ​       | ​ | 3,232,189  | ​         | ​ | ​ | ​        | ​ | 15.16 | ​ | ​ | ​ | ​ | ​ | 49,000,000 | ​ | ​ |
| July 16, 2019(1)     | ​ | ​ | ​       | ​ | 464,986    | ​         | ​ | ​ | ​        | ​ | 15.13 | ​ | ​ | ​ | ​ | ​ | 7,035,237 | ​ | ​ |
| August 26, 2019(1)   | ​ | ​ | ​       | ​ | 480,121    | ​         | ​ | ​ | ​        | ​ | 14.76 | ​ | ​ | ​ | ​ | ​ | 7,088,143 | ​ | ​ |
| October 15, 2019     | ​ | ​ | ​       | ​ | 1,666,667  | ​         | ​ | ​ | ​        | ​ | 15.00 | ​ | ​ | ​ | ​ | ​ | 25,000,000 | ​ | ​ |
| November 12, 2019(1) | ​ | ​ | ​       | ​ | 43,979     | ​         | ​ | ​ | ​        | ​ | 14.76 | ​ | ​ | ​ | ​ | ​ | 649,123 | ​ | ​ |
| December 20, 2019    | ​ | ​ | ​       | ​ | 3,333,333  | ​         | ​ | ​ | ​        | ​ | 15.00 | ​ | ​ | ​ | ​ | ​ | 50,000,000 | ​ | ​ |
| December 23, 2019(1) | ​ | ​ | ​       | ​ | 487,166    | ​         | ​ | ​ | ​        | ​ | 14.52 | ​ | ​ | ​ | ​ | ​ | 7,073,649 | ​ | ​ |
| Total                     | ​ | ​ | ​       | ​ | 25,811,214 | ​         | ​ | ​ | ​        | ​ | ​ | ​ | ​ | ​ | ​ | $ | 388,339,099 | ​ | ​ |

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| ​                     | ​ | ​ | As of December 31, 2019 | ​ |
|-----------------------------|---------|---------|------------------------------|---------|
| ​                     | ​ | ​ | Level 1                 | ​ | ​ | Level 2 | ​ | ​ | Level 3 | ​ | ​ | Total | ​ |
| Portfolio Investments       | ​ | ​ | ​                      | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Senior Secured Term Loans   | ​ | ​ | ​                      | $       | — | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | $ | 349,570,424 | ​ | ​ | ​ | ​ | $ | 349,570,424 | ​ | ​ |
| Preferred Stock             | ​ | ​ | ​                      | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 437,515 | ​ | ​ | ​ | ​ | ​ | 437,515 | ​ | ​ |
| Warrants                    | ​ | ​ | ​                      | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 18,008,337 | ​ | ​ | ​ | ​ | ​ | 18,008,337 | ​ | ​ |
| Total Portfolio Investments | ​ | ​ | ​                      | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 368,016,276 | ​ | ​ | ​ | ​ | ​ | 368,016,276 | ​ | ​ |
| U.S. Treasury Bill          | ​ | ​ | ​                      | ​ | 99,965,423 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 99,965,423 | ​ | ​ |
| Total Investments           | ​ | ​ | ​                      | $       | 99,965,423 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | $ | 368,016,276 | ​ | ​ | ​ | ​ | $ | 467,981,699 | ​ | ​ |
| ​                     |
| ​                     | ​ | ​ | As of December 31, 2018 | ​ |
|-----------------------------|---------|---------|------------------------------|---------|
| ​                     | ​ | ​ | Level 1                 | ​ | ​ | Level 2 | ​ | ​ | Level 3 | ​ | ​ | Total | ​ |
| Portfolio Investments       | ​ | ​ | ​                      | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Senior Secured Term Loans   | ​ | ​ | ​                      | $       | — | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | $ | 208,539,353 | ​ | ​ | ​ | ​ | $ | 208,539,353 | ​ | ​ |
| Preferred Stock             | ​ | ​ | ​                      | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 461,826 | ​ | ​ | ​ | ​ | ​ | 461,826 | ​ | ​ |
| Warrants                    | ​ | ​ | ​                      | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 15,247,210 | ​ | ​ | ​ | ​ | ​ | 15,247,210 | ​ | ​ |
| Total Portfolio Investments | ​ | ​ | ​                      | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 224,248,389 | ​ | ​ | ​ | ​ | ​ | 224,248,389 | ​ | ​ |
| U.S. Treasury Bill          | ​ | ​ | ​                      | ​ | 79,959,928 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 79,959,928 | ​ | ​ |
| Total Investments           | ​ | ​ | ​                      | $       | 79,959,928 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | $ | 224,248,389 | ​ | ​ | ​ | ​ | $ | 304,208,317 | ​ | ​ |
| ​                                                                                              | ​ | ​ | PreferredStock | ​ | ​  | Senior SecuredTerm Loans | ​ | ​ | Warrants | ​ | ​       | Total   | ​ |
|------------------------------------------------------------------------------------------------------|---------|---------|----------------|---------|----------|--------------------------|---------|---------|----------|---------|---------------|---------|---------|
| Fair value at December 31, 2018                                                                 | ​ | ​ | ​        | $       | 461,826  | ​                  | ​ | ​ | ​  | $       | 208,539,353   | ​ | ​ | ​ | ​ | $ | 15,247,210 | ​ | ​ | ​ | ​ | $ | 224,248,389 | ​ | ​ |
| Amortization of fixed income premiums or discounts                                                   | ​ | ​ | ​        | ​ | —  | ​                  | ​ | ​ | ​  | ​ | 12,878,530    | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 12,878,530 | ​ | ​ |
| Purchases of investments(1)                                                                          | ​ | ​ | ​        | ​ | —  | ​                  | ​ | ​ | ​  | ​ | 236,997,789   | ​ | ​ | ​ | ​ | ​ | 6,001,426 | ​ | ​ | ​ | ​ | ​ | 242,999,215 | ​ | ​ |
| Sales of investments(1)                                                                              | ​ | ​ | ​        | ​ | —  | ​                  | ​ | ​ | ​  | ​ | (100,079,608) | ​ | ​ | ​ | ​ | ​ | (2,859,301) | ​ | ​ | ​ | ​ | ​ | (102,938,909) | ​ | ​ |
| Realized gain                                                                                        | ​ | ​ | ​        | ​ | —  | ​                  | ​ | ​ | ​  | ​ | —       | ​ | ​ | ​ | ​ | ​ | 228,171 | ​ | ​ | ​ | ​ | ​ | 228,171 | ​ | ​ |
| Change in unrealized gain (loss)                                                                     | ​ | ​ | ​        | ​ | (24,311) | ​                  | ​ | ​ | ​  | ​ | (8,765,640)   | ​ | ​ | ​ | ​ | ​ | (609,169) | ​ | ​ | ​ | ​ | ​ | (9,399,120) | ​ | ​ |
| Fair value at December 31, 2019                                                                 | ​ | ​ | ​        | $       | 437,515  | ​                  | ​ | ​ | ​  | $       | 349,570,424   | ​ | ​ | ​ | ​ | $ | 18,008,337 | ​ | ​ | ​ | ​ | $ | 368,016,276 | ​ | ​ |
| Change in unrealized gain (loss) on Level 3 investments still held as of December 31, 2019 | ​ | ​ | ​        | $       | (24,311) | ​                  | ​ | ​ | ​  | $       | (8,519,560)   | ​ | ​ | ​ | ​ | $ | 728,460 | ​ | ​ | ​ | ​ | $ | (7,815,411) | ​ | ​ |

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| ​                                                                                              | ​ | ​ | PreferredStock | ​ | ​ | Senior SecuredTerm Loans | ​ | ​ | Warrants | ​ | ​      | Total   | ​ |
|------------------------------------------------------------------------------------------------------|---------|---------|----------------|---------|---------|--------------------------|---------|---------|----------|---------|--------------|---------|---------|
| Fair value at December 31, 2017                                                                 | ​ | ​ | ​        | $       | — | ​                  | ​ | ​ | ​  | $       | 63,977,756   | ​ | ​ | ​ | ​ | $ | 4,239,103 | ​ | ​ | ​ | ​ | $ | 68,216,859 | ​ | ​ |
| Amortization of fixed income premiums or discounts                                                   | ​ | ​ | ​        | ​ | — | ​                  | ​ | ​ | ​  | ​ | 4,621,487    | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 4,621,487 | ​ | ​ |
| Purchases of investments(1)                                                                          | ​ | ​ | ​        | ​ | 250,000 | ​                  | ​ | ​ | ​  | ​ | 157,577,521  | ​ | ​ | ​ | ​ | ​ | 11,212,530 | ​ | ​ | ​ | ​ | ​ | 169,040,051 | ​ | ​ |
| Sales of investments(1)                                                                              | ​ | ​ | ​        | ​ | — | ​                  | ​ | ​ | ​  | ​ | (17,588,385) | ​ | ​ | ​ | ​ | ​ | (92,722) | ​ | ​ | ​ | ​ | ​ | (17,681,107) | ​ | ​ |
| Realized gain                                                                                        | ​ | ​ | ​        | ​ | — | ​                  | ​ | ​ | ​  | ​ | —      | ​ | ​ | ​ | ​ | ​ | 59,792 | ​ | ​ | ​ | ​ | ​ | 59,792 | ​ | ​ |
| Change in unrealized gain (loss)                                                                     | ​ | ​ | ​        | ​ | 211,826 | ​                  | ​ | ​ | ​  | ​ | (49,026)     | ​ | ​ | ​ | ​ | ​ | (171,493) | ​ | ​ | ​ | ​ | ​ | (8,693) | ​ | ​ |
| Fair value at December 31, 2018                                                                 | ​ | ​ | ​        | $       | 461,826 | ​                  | ​ | ​ | ​  | $       | 208,539,353  | ​ | ​ | ​ | ​ | $ | 15,247,210 | ​ | ​ | ​ | ​ | $ | 224,248,389 | ​ | ​ |
| Change in unrealized gain (loss) on Level 3 investments still held as of December 31, 2018 | ​ | ​ | ​        | $       | 211,826 | ​                  | ​ | ​ | ​  | $       | (49,026)     | ​ | ​ | ​ | ​ | $ | (194,141) | ​ | ​ | ​ | ​ | $ | (31,341) | ​ | ​ |
| Description                          | ​ | ​ | Fair Value | ​ | ​     | Valuation Technique | ​ | ​ | Unobservable Inputs                                                 | ​ | ​ | Range(Weighted Average)     | ​ |
|--------------------------------------|---------|---------|------------|---------|-------------|---------------------|---------|---------|---------------------------------------------------------------------|---------|---------|-----------------------------|---------|
| Preferred Stock                      | ​ | ​ | ​    | $       | 437,515     | ​             | ​ | ​ | Recent private market and merger and acquisition transaction prices | ​ | ​ | N/A                         | ​ | ​ | N/A | ​ |
| Senior Secured Term Loans﻿(1) | ​ | ​ | ​    | ​ | 336,388,211 | ​             | ​ | ​ | Discounted Cash Flow analysis                                       | ​ | ​ | Discount rate               | ​ | ​ | 12.3% – 28.0% (16.8%) | ​ |
| ​                              | ​ | ​ | ​    | ​ | ​     | ​             | ​ | ​ | Market approach                                                     | ​ | ​ | Origination yield           | ​ | ​ | 12.3% – 26.0% (14.5%) | ​ |
| ​                              | ​ | ​ | ​    | ​ | 13,182,213  | ​             | ​ | ​ | PWERM                                                               | ​ | ​ | Discount rate               | ​ | ​ | 30.5% – 36.2% (32.6%) | ​ |
| Warrants(2)                          | ​ | ​ | ​    | ​ | 12,695,414  | ​             | ​ | ​ | Black-Scholes model                                                 | ​ | ​ | Risk-free interest rate     | ​ | ​ | 1.6% – 1.8% (1.6%) | ​ |
| ​                              | ​ | ​ | ​    | ​ | ​     | ​             | ​ | ​ | ​                                                             | ​ | ​ | Average industry volatility | ​ | ​ | 30.0% – 60.0% (41.2%) | ​ |
| ​                              | ​ | ​ | ​    | ​ | ​     | ​             | ​ | ​ | ​                                                             | ​ | ​ | Estimated time to exit      | ​ | ​ | 0.5 years – 5.9 years(3.1 years) | ​ |
| ​                              | ​ | ​ | ​    | ​ | 5,312,923   | ​             | ​ | ​ | PWERM                                                               | ​ | ​ | Discount rate               | ​ | ​ | 20.7% – 45.0% (32.6%) | ​ |
| Total Level 3 Investments       | ​ | ​ | ​    | $       | 368,016,276 | ​             | ​ | ​ | ​                                                             | ​ | ​ | ​                     | ​ | ​ | ​ | ​ |

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| Description                          | ​ | ​ | Fair Value | ​ | ​     | Valuation Technique | ​ | ​ | Unobservable Inputs                                                 | ​ | ​ | Range(Weighted Average)     | ​ |
|--------------------------------------|---------|---------|------------|---------|-------------|---------------------|---------|---------|---------------------------------------------------------------------|---------|---------|-----------------------------|---------|
| Preferred Stock                      | ​ | ​ | ​    | $       | 461,826     | ​             | ​ | ​ | Recent private market and merger and acquisition transaction prices | ​ | ​ | N/A                         | ​ | ​ | N/A | ​ |
| Senior Secured Term Loans﻿(1) | ​ | ​ | ​    | ​ | 200,740,155 | ​             | ​ | ​ | Discounted Cash Flow analysis                                       | ​ | ​ | Discount rate               | ​ | ​ | 14.6% – 30.3% (18.4%) | ​ |
| ​                              | ​ | ​ | ​    | ​ | ​     | ​             | ​ | ​ | Market approach                                                     | ​ | ​ | Origination yield           | ​ | ​ | 13.8% – 26.0% (16.8%) | ​ |
| ​                              | ​ | ​ | ​    | ​ | 7,799,198   | ​             | ​ | ​ | PWERM                                                               | ​ | ​ | Discount rate               | ​ | ​ | 24.4% – 62.0% (40.3%) | ​ |
| Warrants(2)                          | ​ | ​ | ​    | ​ | 13,667,210  | ​             | ​ | ​ | Black-Scholes model                                                 | ​ | ​ | Risk-free interest rate     | ​ | ​ | 2.5% – 2.6% (2.5%) | ​ |
| ​                              | ​ | ​ | ​    | ​ | ​     | ​             | ​ | ​ | ​                                                             | ​ | ​ | Average industry volatility | ​ | ​ | 8.0% – 60.0% (25.2%) | ​ |
| ​                              | ​ | ​ | ​    | ​ | ​     | ​             | ​ | ​ | ​                                                             | ​ | ​ | Estimated time to exit      | ​ | ​ | 0.5 years – 7.1 years(4.1 years) | ​ |
| ​                              | ​ | ​ | ​    | ​ | 1,580,000   | ​             | ​ | ​ | Monte Carlo simulation                                              | ​ | ​ | Risk-free interest rate     | ​ | ​ | 2.5% | ​ |
| ​                              | ​ | ​ | ​    | ​ | ​     | ​             | ​ | ​ | ​                                                             | ​ | ​ | Average industry volatility | ​ | ​ | 13.0% | ​ |
| Total Level 3 Investments       | ​ | ​ | ​    | $       | 224,248,389 | ​             | ​ | ​ | ​                                                             | ​ | ​ | ​                     | ​ | ​ | ​ | ​ |

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| Loan Facility                              | ​ | ​ | Date ofAdvance | ​ | ​    | Due Date | ​ | ​ | Amount  | ​ | ​   | Rate    | ​ |
|--------------------------------------------|---------|---------|----------------|---------|------------|----------|---------|---------|---------|---------|-----------|---------|---------|
| KeyBank National Association Loan Facility | ​ | ​ | ​        | ​ | 12/30/2019 | ​  | ​ | ​ | ​ | ​ | 5/31/2022 | ​ | ​ | ​ | ​ | $ | 61,000,000 | ​ | ​ | ​ | ​ | ​ | 5.10% | ​ | ​ |
| ​                                    | ​ | ​ | ​        | ​ | ​    | ​  | ​ | ​ | ​ | ​ | ​   | ​ | ​ | ​ | ​ | $ | 61,000,000 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| ​                                    |

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| Loan Facility                         | ​ | ​ | Date ofAdvance | ​ | ​    | Due Date | ​ | ​ | Amount  | ​ | ​   | Rate    | ​ |
|---------------------------------------|---------|---------|----------------|---------|------------|----------|---------|---------|---------|---------|-----------|---------|---------|
| CIBC Bank USA Committed Loan Facility | ​ | ​ | ​        | ​ | 10/22/2018 | ​  | ​ | ​ | ​ | ​ | 4/20/2019 | ​ | ​ | ​ | ​ | $ | 4,000,000 | ​ | ​ | ​ | ​ | ​ | 5.00% | ​ | ​ |
| CIBC Bank USA Committed Loan Facility | ​ | ​ | ​        | ​ | 11/23/2018 | ​  | ​ | ​ | ​ | ​ | 5/22/2019 | ​ | ​ | ​ | ​ | ​ | 14,000,000 | ​ | ​ | ​ | ​ | ​ | 5.00% | ​ | ​ |
| CIBC Bank USA Committed Loan Facility | ​ | ​ | ​        | ​ | 12/3/2018  | ​  | ​ | ​ | ​ | ​ | 6/1/2019  | ​ | ​ | ​ | ​ | ​ | 12,000,000 | ​ | ​ | ​ | ​ | ​ | 5.00% | ​ | ​ |
| CIBC Bank USA Demand Loan Facility    | ​ | ​ | ​        | ​ | 12/3/2018  | ​  | ​ | ​ | ​ | ​ | 6/1/2019  | ​ | ​ | ​ | ​ | ​ | 4,000,000 | ​ | ​ | ​ | ​ | ​ | 5.00% | ​ | ​ |
| CIBC Bank USA Demand Loan Facility    | ​ | ​ | ​        | ​ | 12/20/2018 | ​  | ​ | ​ | ​ | ​ | 6/18/2019 | ​ | ​ | ​ | ​ | ​ | 16,500,000 | ​ | ​ | ​ | ​ | ​ | 5.00% | ​ | ​ |
| CIBC Bank USA Demand Loan Facility    | ​ | ​ | ​        | ​ | 12/28/2018 | ​  | ​ | ​ | ​ | ​ | 6/26/2019 | ​ | ​ | ​ | ​ | ​ | 9,000,000 | ​ | ​ | ​ | ​ | ​ | 5.00% | ​ | ​ |
| ​                               | ​ | ​ | ​        | ​ | ​    | ​  | ​ | ​ | ​ | ​ | ​   | ​ | ​ | ​ | ​ | $ | 59,500,000 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| ​                                                                                                   | ​ | ​ | Year endedDecember 31,2019 | ​ | ​     | Year endedDecember 31,2018 | ​ | ​ | Year endedDecember 31,2017 | ​ | ​     | Year endedDecember 31,2016 | ​ |
|-----------------------------------------------------------------------------------------------------------|---------|---------|---------------------------------|---------|-------------|---------------------------------|---------|---------|---------------------------------|---------|-------------|---------------------------------|---------|
| Per Share Data(1):                                                                                        | ​ | ​ | ​                         | ​ | ​     | ​                         | ​ | ​ | ​                         | ​ | ​     | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Net asset value at beginning of year                                                                      | ​ | ​ | ​                         | $       | 15.14       | ​                         | ​ | ​ | ​                         | $       | 14.66       | ​                         | ​ | ​ | ​ | $ | 10.38 | ​ | ​ | ​ | ​ | $ | 15.00 | ​ | ​ |
| Net investment income (loss)(3)                                                                           | ​ | ​ | ​                         | ​ | 1.95        | ​                         | ​ | ​ | ​                         | ​ | 1.26        | ​                         | ​ | ​ | ​ | ​ | (0.66) | ​ | ​ | ​ | ​ | ​ | (83.81) | ​ | ​ |
| Realized gain (loss)                                                                                      | ​ | ​ | ​                         | ​ | 0.03        | ​                         | ​ | ​ | ​                         | ​ | —     | ​                         | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Change in unrealized appreciation (depreciation)                                                          | ​ | ​ | ​                         | ​ | (0.50)      | ​                         | ​ | ​ | ​                         | ​ | —     | ​                         | ​ | ​ | ​ | ​ | 0.14 | ​ | ​ | ​ | ​ | ​ | (0.01) | ​ | ​ |
| Issuance of common shares                                                                                 | ​ | ​ | ​                         | ​ | —     | ​                         | ​ | ​ | ​                         | ​ | —     | ​                         | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 79.20 | ​ | ​ |
| Dividends                                                                                                 | ​ | ​ | ​                         | ​ | (2.17)      | ​                         | ​ | ​ | ​                         | ​ | (0.77)      | ​                         | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Accretion(4)                                                                                              | ​ | ​ | ​                         | ​ | 0.13        | ​                         | ​ | ​ | ​                         | ​ | (0.01)      | ​                         | ​ | ​ | ​ | ​ | 4.80 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Net asset value at end of year                                                                            | ​ | ​ | ​                         | $       | 14.58       | ​                         | ​ | ​ | ​                         | $       | 15.14       | ​                         | ​ | ​ | ​ | $ | 14.66 | ​ | ​ | ​ | ​ | $ | 10.38 | ​ | ​ |
| Total return based on net asset value(2)                                                                  | ​ | ​ | ​                         | ​ | (3.68)%     | ​                         | ​ | ​ | ​                         | ​ | 3.27        | ​                         | ​ | ​ | ​ | ​ | 41.23% | ​ | ​ | ​ | ​ | ​ | (30.80)% | ​ | ​ |
| Weighted-average shares outstanding for year, basic                                                       | ​ | ​ | ​                         | ​ | 18,701,021  | ​                         | ​ | ​ | ​                         | ​ | 9,300,960   | ​                         | ​ | ​ | ​ | ​ | 2,795,274 | ​ | ​ | ​ | ​ | ​ | 10,774 | ​ | ​ |
| Ratio/Supplemental Data:                                                                                  | ​ | ​ | ​                         | ​ | ​     | ​                         | ​ | ​ | ​                         | ​ | ​     | ​                         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Net assets at end of year                                                                                 | ​ | ​ | ​                         | $       | 376,313,221 | ​                         | ​ | ​ | ​                         | $       | 167,369,395 | ​                         | ​ | ​ | ​ | $ | 127,040,377 | ​ | ​ | ​ | ​ | $ | 3,476,672 | ​ | ​ |
| Average net assets(5)                                                                                     | ​ | ​ | ​                         | $       | 283,773,605 | ​                         | ​ | ​ | ​                         | $       | 141,046,177 | ​                         | ​ | ​ | ​ | $ | 40,388,772 | ​ | ​ | ​ | ​ | $ | 151,520 | ​ | ​ |
| Annualized ratio of net operating expenses to average net assets﻿(6)                               | ​ | ​ | ​                         | ​ | 6.58%       | ​                         | ​ | ​ | ​                         | ​ | 6.42%       | ​                         | ​ | ​ | ​ | ​ | 12.46% | ​ | ​ | ​ | ​ | ​ | 585.90% | ​ | ​ |
| Annualized ratio of net increase (decrease) in net assets resulting from operations to average net assets | ​ | ​ | ​                         | ​ | 9.74%       | ​                         | ​ | ​ | ​                         | ​ | 8.34%       | ​                         | ​ | ​ | ​ | ​ | (3.56)% | ​ | ​ | ​ | ​ | ​ | (595.90)% | ​ | ​ |

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| ​                                                               | ​ | ​ | March 31,2019 | ​ | ​     | June 30,2019 | ​ | ​ | September 30,2019 | ​ | ​     | December 31,2019 | ​ |
|-----------------------------------------------------------------------|---------|---------|--------------------|---------|-------------|-------------------|---------|---------|------------------------|---------|-------------|-----------------------|---------|
| Total investment income                                               | ​ | ​ | ​            | $       | 12,150,329  | ​           | ​ | ​ | ​                | $       | 16,395,990  | ​               | ​ | ​ | ​ | $ | 11,834,485 | ​ | ​ | ​ | ​ | $ | 14,758,332 | ​ | ​ |
| Total operating expenses                                              | ​ | ​ | ​            | ​ | 4,076,305   | ​           | ​ | ​ | ​                | ​ | 5,025,981   | ​               | ​ | ​ | ​ | ​ | 4,329,742 | ​ | ​ | ​ | ​ | ​ | 5,253,277 | ​ | ​ |
| Net investment income (loss)                                          | ​ | ​ | ​            | ​ | 8,074,024   | ​           | ​ | ​ | ​                | ​ | 11,370,009  | ​               | ​ | ​ | ​ | ​ | 7,504,743 | ​ | ​ | ​ | ​ | ​ | 9,505,055 | ​ | ​ |
| Net realized gain on investments                                      | ​ | ​ | ​            | ​ | —     | ​           | ​ | ​ | ​                | ​ | 493,308     | ​               | ​ | ​ | ​ | ​ | (966) | ​ | ​ | ​ | ​ | ​ | 116,689 | ​ | ​ |
| Net change in unrealized appreciation (depreciation) on investments   | ​ | ​ | ​            | ​ | (2,240,510) | ​           | ​ | ​ | ​                | ​ | (3,247,119) | ​               | ​ | ​ | ​ | ​ | (2,782,423) | ​ | ​ | ​ | ​ | ​ | (1,146,410) | ​ | ​ |
| Increase (decrease) in net assets resulting from operations           | ​ | ​ | ​            | ​ | 5,833,514   | ​           | ​ | ​ | ​                | ​ | 8,616,198   | ​               | ​ | ​ | ​ | ​ | 4,721,354 | ​ | ​ | ​ | ​ | ​ | 8,475,334 | ​ | ​ |
| Increase (decrease) in net assets resulting from operations per share | ​ | ​ | ​            | $       | 0.40        | ​           | ​ | ​ | ​                | $       | 0.55        | ​               | ​ | ​ | ​ | $ | 0.24 | ​ | ​ | ​ | ​ | $ | 0.38 | ​ | ​ |
| Net asset value per share as of the end of the period                 | ​ | ​ | ​            | $       | 15.13       | ​           | ​ | ​ | ​                | $       | 14.76       | ​               | ​ | ​ | ​ | $ | 14.52 | ​ | ​ | ​ | ​ | $ | 14.58 | ​ | ​ |
| ​                                                               | ​ | ​ | March 31,2018 | ​ | ​   | June 30,2018 | ​ | ​ | September 30,2018 | ​ | ​   | December 31,2018 | ​ |
|-----------------------------------------------------------------------|---------|---------|--------------------|---------|-----------|-------------------|---------|---------|------------------------|---------|-----------|-----------------------|---------|
| Total investment income                                               | ​ | ​ | ​            | $       | 3,370,571 | ​           | ​ | ​ | ​                | $       | 4,409,042 | ​               | ​ | ​ | ​ | $ | 5,516,079 | ​ | ​ | ​ | ​ | $ | 7,460,362 | ​ | ​ |
| Total operating expenses                                              | ​ | ​ | ​            | ​ | 1,690,847 | ​           | ​ | ​ | ​                | ​ | 1,760,814 | ​               | ​ | ​ | ​ | ​ | 2,411,145 | ​ | ​ | ​ | ​ | ​ | 3,186,831 | ​ | ​ |
| Net investment income (loss)                                          | ​ | ​ | ​            | ​ | 1,679,724 | ​           | ​ | ​ | ​                | ​ | 2,648,228 | ​               | ​ | ​ | ​ | ​ | 3,104,934 | ​ | ​ | ​ | ​ | ​ | 4,273,531 | ​ | ​ |
| Net realized gain on investments                                      | ​ | ​ | ​            | ​ | 59,792    | ​           | ​ | ​ | ​                | ​ | —   | ​               | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Net change in unrealized appreciation (depreciation) on investments   | ​ | ​ | ​            | ​ | (336,207) | ​           | ​ | ​ | ​                | ​ | (459,019) | ​               | ​ | ​ | ​ | ​ | 493,648 | ​ | ​ | ​ | ​ | ​ | 292,885 | ​ | ​ |
| Increase (decrease) in net assets resulting from operations           | ​ | ​ | ​            | ​ | 1,403,309 | ​           | ​ | ​ | ​                | ​ | 2,189,209 | ​               | ​ | ​ | ​ | ​ | 3,598,582 | ​ | ​ | ​ | ​ | ​ | 4,566,416 | ​ | ​ |
| Increase (decrease) in net assets resulting from operations per share | ​ | ​ | ​            | $       | 0.16      | ​           | ​ | ​ | ​                | $       | 0.25      | ​               | ​ | ​ | ​ | $ | 0.41 | ​ | ​ | ​ | ​ | $ | 0.45 | ​ | ​ |
| Net asset value per share as of the end of the period                 | ​ | ​ | ​            | $       | 14.82     | ​           | ​ | ​ | ​                | $       | 14.92     | ​               | ​ | ​ | ​ | $ | 15.07 | ​ | ​ | ​ | ​ | $ | 15.14 | ​ | ​ |

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| ​                                                               | ​ | ​ | March 31,2017 | ​ | ​   | June 30,2017 | ​ | ​ | September 30,2017 | ​ | ​     | December 31,2017 | ​ |
|-----------------------------------------------------------------------|---------|---------|--------------------|---------|-----------|-------------------|---------|---------|------------------------|---------|-------------|-----------------------|---------|
| Total investment income                                               | ​ | ​ | ​            | $       | 3,288     | ​           | ​ | ​ | ​                | $       | 128,093     | ​               | ​ | ​ | ​ | $ | 1,150,108 | ​ | ​ | ​ | ​ | $ | 1,908,350 | ​ | ​ |
| Total operating expenses                                              | ​ | ​ | ​            | ​ | 885,750   | ​           | ​ | ​ | ​                | ​ | 1,368,402   | ​               | ​ | ​ | ​ | ​ | 1,315,204 | ​ | ​ | ​ | ​ | ​ | 1,462,029 | ​ | ​ |
| Net investment income (loss)                                          | ​ | ​ | ​            | ​ | (882,462) | ​           | ​ | ​ | ​                | ​ | (1,240,309) | ​               | ​ | ​ | ​ | ​ | (165,096) | ​ | ​ | ​ | ​ | ​ | 446,322 | ​ | ​ |
| Net change in unrealized appreciation (depreciation) on investments   | ​ | ​ | ​            | ​ | 164       | ​           | ​ | ​ | ​                | ​ | 1,733       | ​               | ​ | ​ | ​ | ​ | (636) | ​ | ​ | ​ | ​ | ​ | 403,990 | ​ | ​ |
| Increase (decrease) in net assets resulting from operations           | ​ | ​ | ​            | ​ | (882,298) | ​           | ​ | ​ | ​                | ​ | (1,238,576) | ​               | ​ | ​ | ​ | ​ | (165,733) | ​ | ​ | ​ | ​ | ​ | 850,312 | ​ | ​ |
| Increase (decrease) in net assets resulting from operations per share | ​ | ​ | ​            | $       | (2.63)    | ​           | ​ | ​ | ​                | $       | (1.01)      | ​               | ​ | ​ | ​ | $ | (0.05) | ​ | ​ | ​ | ​ | $ | 0.14 | ​ | ​ |
| Net asset value per share as of the end of the period                 | ​ | ​ | ​            | $       | 7.74      | ​           | ​ | ​ | ​                | $       | 13.78       | ​               | ​ | ​ | ​ | $ | 14.32 | ​ | ​ | ​ | ​ | $ | 14.66 | ​ | ​ |
| Date                  | ​ | ​ | Investment Name                             | ​ | ​ | Principal | ​ | ​    | Cost Allocatedto Loan | ​ | ​ | Cost Allocatedto Warrant | ​ |
|-----------------------|---------|---------|---------------------------------------------|---------|---------|-----------|---------|------------|-----------------------|---------|---------|--------------------------|---------|
| January 7, 2020  | ​ | ​ | Credit Sesame, Inc.                         | ​ | ​ | ​   | $       | 43,637,431 | ​               | ​ | ​ | ​                  | $       | 43,212,631 | ​ | ​ | ​ | ​ | $ | 424,800 | ​ | ​ |
| January 30, 2020 | ​ | ​ | Aginity, Inc.                               | ​ | ​ | ​   | $       | 350,000    | ​               | ​ | ​ | ​                  | $       | 350,000 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ |
| March 9, 2020    | ​ | ​ | Aginity, Inc.                               | ​ | ​ | ​   | $       | 200,000    | ​               | ​ | ​ | ​                  | $       | 200,000 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ |
| March 10, 2020   | ​ | ​ | Aginity, Inc.                               | ​ | ​ | ​   | $       | 421,861    | ​               | ​ | ​ | ​                  | $       | 421,861 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ |
| March 16, 2020   | ​ | ​ | Longtail Ad Solutions, Inc. (dba JW Player) | ​ | ​ | ​   | $       | 5,000,000  | ​               | ​ | ​ | ​                  | $       | 5,000,000 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ |

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| ​                                                                                            | ​ | ​ | Page    | ​ |
|----------------------------------------------------------------------------------------------------|---------|---------|---------|---------|
| Report of Independent Registered Public Accounting Firm                                            | ​ | ​ | ​ | ​ | 74 | ​ | ​ |
| Statements of Assets and Liabilities as of December 31, 2019 and 2018                         | ​ | ​ | ​ | ​ | 75 | ​ | ​ |
| Statements of Operations for the years ended December 31, 2019, 2018 and 2017            | ​ | ​ | ​ | ​ | 76 | ​ | ​ |
| Statements of Changes in Net Assets for the years ended December 31, 2019, 2018 and 2017 | ​ | ​ | ​ | ​ | 77 | ​ | ​ |
| Statements of Cash Flows for the years ended December 31, 2019, 2018 and 2017            | ​ | ​ | ​ | ​ | 78 | ​ | ​ |
| Schedules of Investments as of December 31, 2019 and 2018                                     | ​ | ​ | ​ | ​ | 79 | ​ | ​ |
| Notes to Financial Statements                                                                      | ​ | ​ | ​ | ​ | 90 | ​ | ​ |
| ​ |  3.1 | ​ | ​ | Articles of Amendment and Restatement(1)                                                                                                                   | ​ |
|---------|------------|---------|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------|---------|
| ​ |  3.2 | ​ | ​ | Articles of Amendment(2)                                                                                                                                   | ​ |
| ​ |  3.3 | ​ | ​ | Amended and Restated Bylaws(2)                                                                                                                             | ​ |
| ​ |  4.1 | ​ | ​ | Form of Subscription Agreement(3)                                                                                                                          | ​ |
| ​ |  4.2 | ​ | ​ | Description of Securities*                                                                                                                                 | ​ |
| ​ |  9.1 | ​ | ​ | Voting Proxy of OCM Growth Holdings, LLC in favor of Runway Growth Credit Fund Inc.(4)                                                                | ​ |
| ​ | 10.1       | ​ | ​ | Amended and Restated Investment Advisory Agreement between Runway Growth Credit Fund Inc. and Runway Growth Capital LLC, as the investment adviser(5) | ​ |
| ​ | 10.2       | ​ | ​ | Administration Agreement between Runway Growth Credit Fund Inc. and GSV Credit Service Company, LLC, as the administrator(1)                          | ​ |
| ​ | 10.3       | ​ | ​ | Stockholder Agreement between Runway Growth Credit Fund Inc. and OCM Growth Holdings, LLC(1)                                                          | ​ |
| ​ | 10.4       | ​ | ​ | Custody Agreement between Runway Growth Credit Fund Inc. and U.S. Bank National Association, as the custodian(1)                                      | ​ |
| ​ | 10.5       | ​ | ​ | Dividend Reinvestment Plan(6)                                                                                                                              | ​ |
| ​ | 10.6       | ​ | ​ | Form of Indemnification Agreement(6)                                                                                                                       | ​ |
| ​ | 10.7       | ​ | ​ | Trademark License Agreement by and between Runway Growth Capital LLC and the Registrant(7)                                                                 | ​ |

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| ​ | 10.8         | ​ | ​ | Transfer Agent Agreement by and between American Stock Transfer & Trust Company, LLC and the Registrant(8)                                                                                                                                                                                                                                                    | ​ |
|---------|--------------|---------|---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------|
| ​ | 10.9         | ​ | ​ | Marketing and Consulting Agreement by and between Pickwick Capital Partners, LLC, Runway Growth Capital LLC and the Registrant(9)                                                                                                                                                                                                                                 | ​ |
| ​ |  10.10 | ​ | ​ | Marketing and Consulting Agreement by and between Peak Capital Limited, Runway Growth Capital LLC and the Registrant(9)                                                                                                                                                                                                                                           | ​ |
| ​ |  10.11 | ​ | ​ | Credit Agreement, dated as of May 31, 2019, by and among the Company, as borrower, KeyBank National Association, as administrative agent and syndication agent, CIBC Bank USA, as documentation agent, U.S. Bank National Association, as paying agent, the guarantors from time to time party thereto, and the lenders from time to time party thereto.(10) | ​ |
| ​ |  10.12 | ​ | ​ | Document Custody Agreement, dated as of May 31, 2019, by and among the Company, KeyBank National Association, as administrative agent, and U.S. Bank National Association, as document custodian.(10)                                                                                                                                                        | ​ |
| ​ | 11.1         | ​ | ​ | Computation of Per Share Earnings (Included in the notes to the financial statements contained in this report)*                                                                                                                                                                                                                                                   | ​ |
| ​ | 21.1         | ​ | ​ | List of Subsidiaries — None                                                                                                                                                                                                                                                                                                                     | ​ |
| ​ | 31.1         | ​ | ​ | Certification of Chief Executive Officer pursuant to Rule 13a-14 of the Securities Exchange Act of 1934, as amended*                                                                                                                                                                                                                                         | ​ |
| ​ | 31.2         | ​ | ​ | Certification of Chief Financial Officer pursuant to Rule 13a-14 of the Securities Exchange Act of 1934, as amended*                                                                                                                                                                                                                                         | ​ |
| ​ | 32.1         | ​ | ​ | Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002*                                                                                                                                                                                                                                                          | ​ |
| ​ | 32.2         | ​ | ​ | Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002*                                                                                                                                                                                                                                                          | ​ |

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| ​ | Date: March 19, 2020 | ​ | ​ | By:/s/ R. David Spreng ​​R. David SprengPresident, Chief Executive Officer andChairman of the Board of Directors(Principal Executive Officer) | ​ |
|---------|---------------------------|---------|---------|-----------------------------------------------------------------------------------------------------------------------------------------------------------|---------|
| ​ | Date: March 19, 2020 | ​ | ​ | By:/s/ Thomas B. Raterman​​Thomas B. RatermanChief Financial Officer, Treasurer and Secretary(Principal Financial and Accounting Officer)     | ​ |
| ​ | Date: March 19, 2020 | ​ | ​ | By:/s/ Gary Kovacs ​​Gary Kovacs Director                                                                                                     | ​ |
| ​ | Date: March 19, 2020 | ​ | ​ | By:/s/ Brian Laibow ​​Brian Laibow Director                                                                                                   | ​ |
| ​ | Date: March 19, 2020 | ​ | ​ | By:/s/ Julie Persily​​Julie Persily Director                                                                                                  | ​ |
| ​ | Date: March 19, 2020 | ​ | ​ | By:/s/ Lewis W. Solimene, Jr. ​​Lewis W. Solimene, Jr.Director                                                                                | ​ |

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