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| ​ | Maryland(State of Incorporation)                                                 | ​ | ​ | 46-2961489 (I.R.S. Employer Identification Number) | ​ |
|---------|----------------------------------------------------------------------------------|---------|---------|----------------------------------------------------|---------|
| ​ | 200 Park Avenue, 7th Floor New York, NY (Address of principal executive offices) | ​ | ​ | 10166 (Zip Code)                                   | ​ |
| ​ | Title of Each Class                      | ​ | ​ | Name of Each Exchange on Which Registered | ​ |
|---------|------------------------------------------|---------|---------|-------------------------------------------|---------|
| ​ | Common Stock, par value $0.001 per share | ​ | ​ | The NASDAQ Global Select Market           | ​ |
| ​ | 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 ​                                                                                                          | ​ | ​ | ​ | ​ | 23 | ​ | ​ |
| ITEM 1B.UNRESOLVED STAFF COMMENTS ​                                                                                             | ​ | ​ | ​ | ​ | 54 | ​ | ​ |
| ITEM 2.PROPERTIES ​                                                                                                             | ​ | ​ | ​ | ​ | 54 | ​ | ​ |
| ITEM 3.LEGAL PROCEEDINGS ​                                                                                                      | ​ | ​ | ​ | ​ | 54 | ​ | ​ |
| ITEM 4.MINE SAFETY DISCLOSURES ​                                                                                                | ​ | ​ | ​ | ​ | 54 | ​ | ​ |
| PART II                                                                                                                               | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| ITEM 5.MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES ​     | ​ | ​ | ​ | ​ | 55 | ​ | ​ |
| ITEM 6.SELECTED FINANCIAL DATA ​                                                                                                | ​ | ​ | ​ | ​ | 57 | ​ | ​ |
| ITEM 7.MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS ​                            | ​ | ​ | ​ | ​ | 58 | ​ | ​ |
| ITEM 7A.QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK ​                                                            | ​ | ​ | ​ | ​ | 70 | ​ | ​ |
| ITEM 8.FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA ​                                                                            | ​ | ​ | ​ | ​ | 71 | ​ | ​ |
| ITEM 9.CHANGES IN AND DISAGREEMENTS WITH INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM ON ACCOUNTING AND FINANCIAL DISCLOSURE ​ | ​ | ​ | ​ | ​ | 108 | ​ | ​ |
| ITEM 9A.CONTROLS AND PROCEDURES ​                                                                                               | ​ | ​ | ​ | ​ | 108 | ​ | ​ |
| ITEM 9B.OTHER INFORMATION ​                                                                                                     | ​ | ​ | ​ | ​ | 109 | ​ | ​ |
| PART III                                                                                                                              | ​ | ​ |
| ITEM 10.DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE ​                                                                | ​ | ​ | ​ | ​ | 110 | ​ | ​ |
| ITEM 11.EXECUTIVE COMPENSATION ​                                                                                                | ​ | ​ | ​ | ​ | 110 | ​ | ​ |
| ITEM 12.SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS ​                        | ​ | ​ | ​ | ​ | 110 | ​ | ​ |
| ITEM 13.CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE ​                                             | ​ | ​ | ​ | ​ | 110 | ​ | ​ |
| ITEM 14.PRINCIPAL ACCOUNTANT FEES AND SERVICES ​                                                                                | ​ | ​ | ​ | ​ | 110 | ​ | ​ |
| PART IV                                                                                                                               | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| ITEM 15.EXHIBITS AND FINANCIAL STATEMENT SCHEDULES ​                                                                            | ​ | ​ | ​ | ​ | 111 | ​ | ​ |
| SIGNATURES                                                                                                                            | ​ | ​ | ​ | ​ | 116 | ​ | ​ |

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| Period                                           | ​ | ​ | Total Number of Shares Purchased(2) | ​ | ​ | Average Price Paid Per Share | ​ | ​ | Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs(3) | ​ | ​ | Approximate Dollar Value of Shares that May Yet Be Purchased Under the Share Repurchase Program(4) | ​ |
|--------------------------------------------------|---------|---------|-------------------------------------|---------|---------|------------------------------|---------|---------|-------------------------------------------------------------------------------------|---------|---------|----------------------------------------------------------------------------------------------------|---------|
| October 1 – October 31, 2018   | ​ | ​ | ​                             | ​ | — | ​                      | ​ | ​ | ​                                                                             | ​ | — | ​                                                                                            | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| November 1 – November 30, 2018 | ​ | ​ | ​                             | ​ | — | ​                      | ​ | ​ | ​                                                                             | ​ | — | ​                                                                                            | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| December 1 – December 31, 2018 | ​ | ​ | ​                             | ​ | 485,939 | ​                      | ​ | ​ | ​                                                                             | $       | 6.62    | ​                                                                                            | ​ | ​ | ​ | ​ | 411,939 | ​ | ​ | ​ | ​ | $ | 7,292,187 | ​ | ​ |

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| ​                                                         | ​ | ​ | ​                                                                               | ​ | ​     | ​                                                                               | ​ | ​ | ​                                                                               | ​ | ​      | ​                                                                               | ​ | ​ | ​                                                                            | ​ | ​     | ​                                                                            | ​ | ​ | ​ | ​ | ​     | ​ | ​ | ​ | Year ended December 31, 2014 | ​ |
|-----------------------------------------------------------------|---------|---------|---------------------------------------------------------------------------------------|---------|-------------|---------------------------------------------------------------------------------------|---------|---------|---------------------------------------------------------------------------------------|---------|--------------|---------------------------------------------------------------------------------------|---------|---------|------------------------------------------------------------------------------------|---------|-------------|------------------------------------------------------------------------------------|---------|---------|---------|---------|-------------|---------|---------|---------|------------------------------|---------|
| ​                                                         | ​ | ​ | Alcentra Capital Corporation from January 1, 2018 through December 31, 2018 | ​ | ​     | Alcentra Capital Corporation from January 1, 2017 through December 31, 2017 | ​ | ​ | Alcentra Capital Corporation from January 1, 2016 through December 31, 2016 | ​ | ​      | Alcentra Capital Corporation from January 1, 2015 through December 31, 2015 | ​ | ​ | Alcentra Capital Corporation from May 8,* 2014 through December 31, 2014 | ​ | ​     | BNY Mellon-Alcentra Mezzanine III, L.P. from January 1, 2014 through 7-May-14 | ​ |
| Statement of operations data:                                   | ​ | ​ | ​                                                                               | ​ | ​     | ​                                                                               | ​ |
| Total investment income                                         | ​ | ​ | ​                                                                               | $       | 28,967,980  | ​                                                                               | ​ | ​ | ​                                                                               | $       | 33,351,509   | ​                                                                               | ​ | ​ | ​                                                                            | $       | 40,602,599  | ​                                                                            | ​ | ​ | ​ | $       | 33,916,249  | ​ | ​ | ​ | ​                      | $       | 16,166,214 | ​ | ​ | ​ | ​ | $ | 7,761,894 | ​ | ​ |
| Total expenses, net of fee waiver                               | ​ | ​ | ​                                                                               | ​ | 15,051,101  | ​                                                                               | ​ | ​ | ​                                                                               | ​ | 15,027,370   | ​                                                                               | ​ | ​ | ​                                                                            | ​ | 18,193,683  | ​                                                                            | ​ | ​ | ​ | ​ | 14,618,080  | ​ | ​ | ​ | ​                      | ​ | 4,564,482 | ​ | ​ | ​ | ​ | ​ | 834,336 | ​ | ​ |
| Net investment income                                           | ​ | ​ | ​                                                                               | $       | 13,916,879  | ​                                                                               | ​ | ​ | ​                                                                               | $       | 18,324,139   | ​                                                                               | ​ | ​ | ​                                                                            | $       | 22,408,916  | ​                                                                            | ​ | ​ | ​ | $       | 19,298,169  | ​ | ​ | ​ | ​                      | $       | 11,601,732 | ​ | ​ | ​ | ​ | $ | 6,927,558 | ​ | ​ |
| Net increase/(decrease) in net assets resulting from operations | ​ | ​ | ​                                                                               | $       | 5,457,132   | ​                                                                               | ​ | ​ | ​                                                                               | $       | (19,101,742) | ​                                                                               | ​ | ​ | ​                                                                            | $       | 8,789,516   | ​                                                                            | ​ | ​ | ​ | $       | 12,611,774  | ​ | ​ | ​ | ​                      | $       | 14,735,021 | ​ | ​ | ​ | ​ | $ | 9,954,110 | ​ | ​ |
| Per share data:                                                 | ​ | ​ | ​                                                                               | ​ | ​     | ​                                                                               | ​ |
| Net investment income                                           | ​ | ​ | ​                                                                               | $       | 1.01        | ​                                                                               | ​ | ​ | ​                                                                               | $       | 1.32         | ​                                                                               | ​ | ​ | ​                                                                            | $       | 1.66        | ​                                                                            | ​ | ​ | ​ | $       | 1.43        | ​ | ​ | ​ | ​                      | $       | 0.86 | ​ | ​ | ​ | ​ | $ | N.A. | ​ | ​ |
| Net increase in net assets resulting from operations            | ​ | ​ | ​                                                                               | $       | 0.40        | ​                                                                               | ​ | ​ | ​                                                                               | $       | (1.37)       | ​                                                                               | ​ | ​ | ​                                                                            | $       | 0.65        | ​                                                                            | ​ | ​ | ​ | $       | 0.93        | ​ | ​ | ​ | ​                      | $       | 1.09 | ​ | ​ | ​ | ​ | $ | N.A. | ​ | ​ |
| Dividends declared                                              | ​ | ​ | ​                                                                               | $       | 0.72        | ​                                                                               | ​ | ​ | ​                                                                               | $       | 1.30         | ​                                                                               | ​ | ​ | ​                                                                            | $       | 1.36        | ​                                                                            | ​ | ​ | ​ | $       | 1.36        | ​ | ​ | ​ | ​                      | $       | 0.858 | ​ | ​ | ​ | ​ | $ | N.A. | ​ | ​ |
| Net asset value per share                                       | ​ | ​ | ​                                                                               | $       | 11.13       | ​                                                                               | ​ | ​ | ​                                                                               | $       | 11.09        | ​                                                                               | ​ | ​ | ​                                                                            | $       | 13.72       | ​                                                                            | ​ | ​ | ​ | $       | 14.43       | ​ | ​ | ​ | ​                      | $       | 14.87 | ​ | ​ | ​ | ​ | $ | N.A. | ​ | ​ |
| Balance sheet data:                                             | ​ | ​ | ​                                                                               | ​ | ​     | ​                                                                               | ​ |
| Total assets                                                    | ​ | ​ | ​                                                                               | $       | 253,713,428 | ​                                                                               | ​ | ​ | ​                                                                               | $       | 310,326,150  | ​                                                                               | ​ | ​ | ​                                                                            | $       | 292,928,229 | ​                                                                            | ​ | ​ | ​ | $       | 307,495,807 | ​ | ​ | ​ | ​                      | $       | 272,219,375 | ​ | ​ | ​ | ​ | $ | 175,925,784 | ​ | ​ |
| Cash and cash equivalents                                       | ​ | ​ | ​                                                                               | $       | 11,049,499  | ​                                                                               | ​ | ​ | ​                                                                               | $       | 13,882,956   | ​                                                                               | ​ | ​ | ​                                                                            | $       | 3,891,606   | ​                                                                            | ​ | ​ | ​ | $       | 4,866,972   | ​ | ​ | ​ | ​                      | $       | 10,022,617 | ​ | ​ | ​ | ​ | $ | 10,703,472 | ​ | ​ |
| Total net assets                                                | ​ | ​ | ​                                                                               | $       | 145,737,532 | ​                                                                               | ​ | ​ | ​                                                                               | $       | 157,714,175  | ​                                                                               | ​ | ​ | ​                                                                            | $       | 184,524,591 | ​                                                                            | ​ | ​ | ​ | $       | 195,032,211 | ​ | ​ | ​ | ​                      | $       | 200,989,308 | ​ | ​ | ​ | ​ | $ | 175,567,210 | ​ | ​ |
| WA shares outstanding                                           | ​ | ​ | ​                                                                               | ​ | 13,721,109  | ​                                                                               | ​ | ​ | ​                                                                               | ​ | 13,928,869   | ​                                                                               | ​ | ​ | ​                                                                            | ​ | 13,496,128  | ​                                                                            | ​ | ​ | ​ | ​ | 13,516,766  | ​ | ​ | ​ | ​                      | ​ | 13,516,766 | ​ | ​ | ​ |
| Shares outstanding at period end                                | ​ | ​ | ​                                                                               | ​ | 13,105,295  | ​                                                                               | ​ | ​ | ​                                                                               | ​ | 14,222,945   | ​                                                                               | ​ | ​ | ​                                                                            | ​ | 13,451,633  | ​                                                                            | ​ | ​ | ​ | ​ | 13,516,766  | ​ | ​ | ​ | ​                      | ​ | 13,516,766 | ​ | ​ | ​ |

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|                                                | ​ | ​ | Cost              | ​ | ​ | Fair Value        | ​ |
|------------------------------------------------|---------|---------|-------------------|---------|---------|-------------------|---------|
| ​                                        | ​ | ​ | December 31, 2018 | ​ | ​ | December 31, 2017 | ​ | ​ | December 31, 2018 | ​ | ​ | December 31, 2017 | ​ |
| Senior Secured – First Lien  | ​ | ​ | ​           | $       | 167,745 | ​           | ​ | ​ | ​ | ​ | 66.1% | ​ | ​ | ​ | ​ | $ | 181,664 | ​ | ​ | ​ | ​ | ​ | 54.5% | ​ | ​ | ​ | ​ | $ | 168,155 | ​ | ​ | ​ | ​ | ​ | 71.6% | ​ | ​ | ​ | ​ | $ | 177,340 | ​ | ​ | ​ | ​ | ​ | 61.7% | ​ | ​ |
| Senior Secured – Second Lien | ​ | ​ | ​           | ​ | 42,210  | ​           | ​ | ​ | ​ | ​ | 16.6% | ​ | ​ | ​ | ​ | ​ | 24,331 | ​ | ​ | ​ | ​ | ​ | 7.3% | ​ | ​ | ​ | ​ | ​ | 42,549 | ​ | ​ | ​ | ​ | ​ | 18.1% | ​ | ​ | ​ | ​ | ​ | 14,204 | ​ | ​ | ​ | ​ | ​ | 4.9% | ​ | ​ |
| Senior Subordinated                            | ​ | ​ | ​           | ​ | 4,742   | ​           | ​ | ​ | ​ | ​ | 1.9% | ​ | ​ | ​ | ​ | ​ | 81,397 | ​ | ​ | ​ | ​ | ​ | 24.4% | ​ | ​ | ​ | ​ | ​ | 1,213 | ​ | ​ | ​ | ​ | ​ | 0.5% | ​ | ​ | ​ | ​ | ​ | 66,885 | ​ | ​ | ​ | ​ | ​ | 23.3% | ​ | ​ |
| CLO/Structured Credit                          | ​ | ​ | ​           | ​ | 1,948   | ​           | ​ | ​ | ​ | ​ | 0.8% | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | —% | ​ | ​ | ​ | ​ | ​ | 1,740 | ​ | ​ | ​ | ​ | ​ | 0.7% | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | —% | ​ | ​ |
| Equity/Other                                   | ​ | ​ | ​           | ​ | 37,233  | ​           | ​ | ​ | ​ | ​ | 14.7% | ​ | ​ | ​ | ​ | ​ | 45,824 | ​ | ​ | ​ | ​ | ​ | 13.8% | ​ | ​ | ​ | ​ | ​ | 21,141 | ​ | ​ | ​ | ​ | ​ | 9.0% | ​ | ​ | ​ | ​ | ​ | 29,126 | ​ | ​ | ​ | ​ | ​ | 10.1% | ​ | ​ |
| Total                                          | ​ | ​ | ​           | $       | 253,878 | ​           | ​ | ​ | ​ | ​ | 100.0% | ​ | ​ | ​ | ​ | $ | 333,216 | ​ | ​ | ​ | ​ | ​ | 100.0% | ​ | ​ | ​ | ​ | $ | 234,798 | ​ | ​ | ​ | ​ | ​ | 100.0% | ​ | ​ | ​ | ​ | $ | 287,555 | ​ | ​ | ​ | ​ | ​ | 100.0% | ​ | ​ |
| ​                                        |

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| ​   | ​ | ​ | Cost                   | ​ | ​ | Fair Value        | ​ |
|-----------|---------|---------|------------------------|---------|---------|-------------------|---------|
| ​   | ​ | ​ | December 31, 2018      | ​ | ​ | December 31, 2017 | ​ | ​ | December 31, 2018 | ​ | ​ | December 31, 2017 | ​ |
| ​   | ​ | ​ | (dollars in thousands) | ​ |
| Southeast | ​ | ​ | ​                | $       | 56,535  | ​           | ​ | ​ | ​ | ​ | 22.3% | ​ | ​ | ​ | ​ | $ | 99,475 | ​ | ​ | ​ | ​ | ​ | 29.9% | ​ | ​ | ​ | ​ | $ | 44,027 | ​ | ​ | ​ | ​ | ​ | 18.8% | ​ | ​ | ​ | ​ | $ | 78,668 | ​ | ​ | ​ | ​ | ​ | 27.4% | ​ | ​ |
| Northeast | ​ | ​ | ​                | ​ | 43,623  | ​           | ​ | ​ | ​ | ​ | 17.2% | ​ | ​ | ​ | ​ | ​ | 57,108 | ​ | ​ | ​ | ​ | ​ | 17.1% | ​ | ​ | ​ | ​ | ​ | 38,144 | ​ | ​ | ​ | ​ | ​ | 16.2% | ​ | ​ | ​ | ​ | ​ | 54,446 | ​ | ​ | ​ | ​ | ​ | 18.9% | ​ | ​ |
| West      | ​ | ​ | ​                | ​ | 52,427  | ​           | ​ | ​ | ​ | ​ | 20.7% | ​ | ​ | ​ | ​ | ​ | 57,328 | ​ | ​ | ​ | ​ | ​ | 17.2% | ​ | ​ | ​ | ​ | ​ | 54,267 | ​ | ​ | ​ | ​ | ​ | 23.1% | ​ | ​ | ​ | ​ | ​ | 49,593 | ​ | ​ | ​ | ​ | ​ | 17.2% | ​ | ​ |
| South     | ​ | ​ | ​                | ​ | 45,438  | ​           | ​ | ​ | ​ | ​ | 17.9% | ​ | ​ | ​ | ​ | ​ | 56,444 | ​ | ​ | ​ | ​ | ​ | 16.9% | ​ | ​ | ​ | ​ | ​ | 43,759 | ​ | ​ | ​ | ​ | ​ | 18.6% | ​ | ​ | ​ | ​ | ​ | 48,087 | ​ | ​ | ​ | ​ | ​ | 16.7% | ​ | ​ |
| Midwest   | ​ | ​ | ​                | ​ | 24,842  | ​           | ​ | ​ | ​ | ​ | 9.8% | ​ | ​ | ​ | ​ | ​ | 39,884 | ​ | ​ | ​ | ​ | ​ | 12.0% | ​ | ​ | ​ | ​ | ​ | 23,615 | ​ | ​ | ​ | ​ | ​ | 10.1% | ​ | ​ | ​ | ​ | ​ | 33,560 | ​ | ​ | ​ | ​ | ​ | 11.7% | ​ | ​ |
| Canada    | ​ | ​ | ​                | ​ | 22,721  | ​           | ​ | ​ | ​ | ​ | 8.9% | ​ | ​ | ​ | ​ | ​ | 22,978 | ​ | ​ | ​ | ​ | ​ | 6.9% | ​ | ​ | ​ | ​ | ​ | 22,900 | ​ | ​ | ​ | ​ | ​ | 9.8% | ​ | ​ | ​ | ​ | ​ | 23,200 | ​ | ​ | ​ | ​ | ​ | 8.1% | ​ | ​ |
| Ireland   | ​ | ​ | ​                | ​ | 6,344   | ​           | ​ | ​ | ​ | ​ | 2.5% | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | —% | ​ | ​ | ​ | ​ | ​ | 6,347 | ​ | ​ | ​ | ​ | ​ | 2.7% | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | —% | ​ | ​ |
| US (CLO)  | ​ | ​ | ​                | ​ | 1,948   | ​           | ​ | ​ | ​ | ​ | 0.8% | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | —% | ​ | ​ | ​ | ​ | ​ | 1,740 | ​ | ​ | ​ | ​ | ​ | 0.7% | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | —% | ​ | ​ |
| Total     | ​ | ​ | ​                | $       | 253,878 | ​           | ​ | ​ | ​ | ​ | 100.0% | ​ | ​ | ​ | ​ | $ | 333,217 | ​ | ​ | ​ | ​ | ​ | 100.0% | ​ | ​ | ​ | ​ | $ | 234,798 | ​ | ​ | ​ | ​ | ​ | 100.0% | ​ | ​ | ​ | ​ | $ | 287,554 | ​ | ​ | ​ | ​ | ​ | 100.0% | ​ | ​ |
| ​   |
| ​                                       | ​ | ​ | Cost                   | ​ | ​ | Fair Value             | ​ |
|-----------------------------------------------|---------|---------|------------------------|---------|---------|------------------------|---------|
| ​                                       | ​ | ​ | December 31, 2018 | ​ | ​ | December 31, 2017 | ​ | ​ | December 31, 2018 | ​ | ​ | December 31, 2017 | ​ |
| Business Services                             | ​ | ​ | ​                | ​ | 18.08%  | ​                | ​ | ​ | ​ | ​ | 15.41% | ​ | ​ | ​ | ​ | ​ | 19.65% | ​ | ​ | ​ | ​ | ​ | 17.99% | ​ | ​ |
| Healthcare Services                           | ​ | ​ | ​                | ​ | 17.62%  | ​                | ​ | ​ | ​ | ​ | 16.55% | ​ | ​ | ​ | ​ | ​ | 19.18% | ​ | ​ | ​ | ​ | ​ | 19.23% | ​ | ​ |
| Technology & Telecom                      | ​ | ​ | ​                | ​ | 12.73%  | ​                | ​ | ​ | ​ | ​ | 7.19% | ​ | ​ | ​ | ​ | ​ | 14.20% | ​ | ​ | ​ | ​ | ​ | 8.10% | ​ | ​ |
| Consumer Services                             | ​ | ​ | ​                | ​ | 10.33%  | ​                | ​ | ​ | ​ | ​ | 0.00% | ​ | ​ | ​ | ​ | ​ | 11.17% | ​ | ​ | ​ | ​ | ​ | 0.00% | ​ | ​ |
| Industrial Services                           | ​ | ​ | ​                | ​ | 8.31%   | ​                | ​ | ​ | ​ | ​ | 8.93% | ​ | ​ | ​ | ​ | ​ | 8.33% | ​ | ​ | ​ | ​ | ​ | 10.32% | ​ | ​ |
| Media: Advertising, Printing & Publishing | ​ | ​ | ​                | ​ | 4.99%   | ​                | ​ | ​ | ​ | ​ | 3.80% | ​ | ​ | ​ | ​ | ​ | 2.79% | ​ | ​ | ​ | ​ | ​ | 2.32% | ​ | ​ |
| Retail                                        | ​ | ​ | ​                | ​ | 4.75%   | ​                | ​ | ​ | ​ | ​ | 4.14% | ​ | ​ | ​ | ​ | ​ | 5.16% | ​ | ​ | ​ | ​ | ​ | 4.94% | ​ | ​ |
| Oil & Gas Services                        | ​ | ​ | ​                | ​ | 4.48%   | ​                | ​ | ​ | ​ | ​ | 4.86% | ​ | ​ | ​ | ​ | ​ | 4.85% | ​ | ​ | ​ | ​ | ​ | 3.88% | ​ | ​ |
| Wholesale/Distribution                        | ​ | ​ | ​                | ​ | 4.01%   | ​                | ​ | ​ | ​ | ​ | 5.79% | ​ | ​ | ​ | ​ | ​ | 4.52% | ​ | ​ | ​ | ​ | ​ | 6.85% | ​ | ​ |
| High Tech Industries                          | ​ | ​ | ​                | ​ | 3.43%   | ​                | ​ | ​ | ​ | ​ | 5.61% | ​ | ​ | ​ | ​ | ​ | 3.72% | ​ | ​ | ​ | ​ | ​ | 6.51% | ​ | ​ |
| Environmental/Recycling Services              | ​ | ​ | ​                | ​ | 2.66%   | ​                | ​ | ​ | ​ | ​ | 2.28% | ​ | ​ | ​ | ​ | ​ | 2.43% | ​ | ​ | ​ | ​ | ​ | 2.72% | ​ | ​ |
| Education                                     | ​ | ​ | ​                | ​ | 2.24%   | ​                | ​ | ​ | ​ | ​ | 4.76% | ​ | ​ | ​ | ​ | ​ | 0.00% | ​ | ​ | ​ | ​ | ​ | 0.00% | ​ | ​ |
| Security                                      | ​ | ​ | ​                | ​ | 2.16%   | ​                | ​ | ​ | ​ | ​ | 4.61% | ​ | ​ | ​ | ​ | ​ | 0.44% | ​ | ​ | ​ | ​ | ​ | 4.92% | ​ | ​ |
| Telecommunications                            | ​ | ​ | ​                | ​ | 1.74%   | ​                | ​ | ​ | ​ | ​ | 4.69% | ​ | ​ | ​ | ​ | ​ | 1.88% | ​ | ​ | ​ | ​ | ​ | 6.15% | ​ | ​ |
| Waste Services                                | ​ | ​ | ​                | ​ | 1.00%   | ​                | ​ | ​ | ​ | ​ | 0.76% | ​ | ​ | ​ | ​ | ​ | 0.35% | ​ | ​ | ​ | ​ | ​ | 0.96% | ​ | ​ |
| USD CLO                                       | ​ | ​ | ​                | ​ | 0.77%   | ​                | ​ | ​ | ​ | ​ | 0.00% | ​ | ​ | ​ | ​ | ​ | 0.74% | ​ | ​ | ​ | ​ | ​ | 0.00% | ​ | ​ |
| Transportation Logistics                      | ​ | ​ | ​                | ​ | 0.49%   | ​                | ​ | ​ | ​ | ​ | 2.31% | ​ | ​ | ​ | ​ | ​ | 0.31% | ​ | ​ | ​ | ​ | ​ | 1.90% | ​ | ​ |
| Industrial Manufacturing                      | ​ | ​ | ​                | ​ | 0.20%   | ​                | ​ | ​ | ​ | ​ | 2.65% | ​ | ​ | ​ | ​ | ​ | 0.28% | ​ | ​ | ​ | ​ | ​ | 3.21% | ​ | ​ |
| Media & Entertainment                     | ​ | ​ | ​                | ​ | 0.00%   | ​                | ​ | ​ | ​ | ​ | 3.11% | ​ | ​ | ​ | ​ | ​ | 0.00% | ​ | ​ | ​ | ​ | ​ | 0.00% | ​ | ​ |
| Automotive Business Services                  | ​ | ​ | ​                | ​ | 0.00%   | ​                | ​ | ​ | ​ | ​ | 2.55% | ​ | ​ | ​ | ​ | ​ | 0.00% | ​ | ​ | ​ | ​ | ​ | 0.00% | ​ | ​ |
| Grand Total                                   | ​ | ​ | ​                | ​ | 100.00% | ​                | ​ | ​ | ​ | ​ | 100.00% | ​ | ​ | ​ | ​ | ​ | 100.00% | ​ | ​ | ​ | ​ | ​ | 100.00% | ​ | ​ |
| ​                                       |

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| ​           | ​ | ​ | Year Ended December 31, 2018 | ​ | ​ | Year Ended December 31, 2017 | ​ | ​ | Year Ended December 31, 2016 | ​ |
|-------------------|---------|---------|------------------------------|---------|---------|------------------------------|---------|---------|------------------------------|---------|
| Interest Income   | ​ | ​ | ​                      | $       | 25.0    | ​                      | ​ | ​ | ​                      | $       | 26.9 | ​ | ​ | ​ | ​ | $ | 29.5 | ​ | ​ |
| PIK Interest      | ​ | ​ | ​                      | ​ | 0.8     | ​                      | ​ | ​ | ​                      | ​ | 4.1 | ​ | ​ | ​ | ​ | ​ | 6.2 | ​ | ​ |
| Other Income/Fees | ​ | ​ | ​                      | ​ | 3.1     | ​                      | ​ | ​ | ​                      | ​ | 2.4 | ​ | ​ | ​ | ​ | ​ | 4.9 | ​ | ​ |
| Total             | ​ | ​ | ​                      | $       | 28.9    | ​                      | ​ | ​ | ​                      | $       | 33.4 | ​ | ​ | ​ | ​ | $ | 40.6 | ​ | ​ |
| ​           |

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| ​                                   | ​ | ​ | Year Ended December 31, 2018 | ​ | ​ | Year Ended December 31, 2017 | ​ | ​ | Year Ended December 31, 2016 | ​ |
|-------------------------------------------|---------|---------|------------------------------|---------|---------|------------------------------|---------|---------|------------------------------|---------|
| Operating Expenses:                       | ​ | ​ | ​                      | ​ | ​ | ​                      | ​ | ​ | ​                      | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Management Fees                           | ​ | ​ | ​                      | $       | 4.1     | ​                      | ​ | ​ | ​                      | $       | 5.0 | ​ | ​ | ​ | ​ | $ | 5.2 | ​ | ​ |
| Incentive Fees                            | ​ | ​ | ​                      | ​ | (0.4)   | ​                      | ​ | ​ | ​                      | ​ | 0.6 | ​ | ​ | ​ | ​ | ​ | 3.3 | ​ | ​ |
| Professional Fees                         | ​ | ​ | ​                      | ​ | 1.6     | ​                      | ​ | ​ | ​                      | ​ | 1.2 | ​ | ​ | ​ | ​ | ​ | 1.2 | ​ | ​ |
| Valuation services                        | ​ | ​ | ​                      | ​ | 0.2     | ​                      | ​ | ​ | ​                      | ​ | 0.3 | ​ | ​ | ​ | ​ | ​ | 0.2 | ​ | ​ |
| Interest and credit facility expense      | ​ | ​ | ​                      | ​ | 6.7     | ​                      | ​ | ​ | ​                      | ​ | 6.4 | ​ | ​ | ​ | ​ | ​ | 5.7 | ​ | ​ |
| Amortization of deferred financing costs  | ​ | ​ | ​                      | ​ | 0.6     | ​                      | ​ | ​ | ​                      | ​ | 1.4 | ​ | ​ | ​ | ​ | ​ | 1.3 | ​ | ​ |
| Directors Fees                            | ​ | ​ | ​                      | ​ | 0.4     | ​                      | ​ | ​ | ​                      | ​ | 0.3 | ​ | ​ | ​ | ​ | ​ | 0.3 | ​ | ​ |
| Insurance Expense                         | ​ | ​ | ​                      | ​ | 0.2     | ​                      | ​ | ​ | ​                      | ​ | 0.2 | ​ | ​ | ​ | ​ | ​ | 0.3 | ​ | ​ |
| Other Expenses                            | ​ | ​ | ​                      | ​ | 2.1     | ​                      | ​ | ​ | ​                      | ​ | 0.8 | ​ | ​ | ​ | ​ | ​ | 0.7 | ​ | ​ |
| Total Operating Expenses                  | ​ | ​ | ​                      | $       | 15.5    | ​                      | ​ | ​ | ​                      | $       | 16.4 | ​ | ​ | ​ | ​ | $ | 18.2 | ​ | ​ |
| Waiver of Incentive & Management Fees | ​ | ​ | ​                      | ​ | (0.4)   | ​                      | ​ | ​ | ​                      | ​ | (1.3) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Total Expenses, Net of Fee Waivers        | ​ | ​ | ​                      | $       | 15.1    | ​                      | ​ | ​ | ​                      | $       | 15.0 | ​ | ​ | ​ | ​ | $ | 18.2 | ​ | ​ |
| ​                                   |

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| ​                 | ​ | ​ | Total                  | ​ | ​ | 2019    | ​ | ​ | 2020    | ​ | ​ | 2021    | ​ | ​ | 2022    | ​ | ​ | 2023 andthereafter | ​ |
|-------------------------|---------|---------|------------------------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|--------------------|---------|
| ​                 | ​ | ​ | (dollars in thousands) | ​ |
| Credit facility payable | ​ | ​ | ​                | $       | 28,536  | ​ | ​ | ​ | ​ | $       | — | ​ | ​ | ​ | ​ | $       | 28,536  | ​            | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | $ | — | ​ | ​ |
| Notes payable           | ​ | ​ | ​                | ​ | 55,000  | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 38,582  | ​            | ​ | ​ | ​ | ​ | 15,000 | ​ | ​ | ​ | ​ | ​ | 1,418 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| ​                 | ​ | ​ | ​                | $       | 83,536  | ​ | ​ | ​ | ​ | $       | — | ​ | ​ | ​ | ​ | $       | 67,118  | ​            | ​ | ​ | ​ | $ | 15,000 | ​ | ​ | ​ | ​ | $ | 1,418 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ |
| ​                 |

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| Risk Rating | ​ | ​ | Cost    | ​ | ​ | % of Cost | ​ | ​ | FMV     | ​ | ​ | % of FMV | ​ |
|-------------|---------|---------|---------|---------|---------|-----------|---------|---------|---------|---------|---------|----------|---------|
| 1           | ​ | ​ | ​ | $       | 139,810 | ​   | ​ | ​ | ​ | ​ | 55.1%   | ​  | ​ | ​ | ​ | $ | 140,473 | ​ | ​ | ​ | ​ | ​ | 59.8% | ​ | ​ |
| 2           | ​ | ​ | ​ | ​ | 57,595  | ​   | ​ | ​ | ​ | ​ | 22.7%   | ​  | ​ | ​ | ​ | ​ | 56,011 | ​ | ​ | ​ | ​ | ​ | 23.9% | ​ | ​ |
| 3           | ​ | ​ | ​ | ​ | 21,771  | ​   | ​ | ​ | ​ | ​ | 8.6%    | ​  | ​ | ​ | ​ | ​ | 20,014 | ​ | ​ | ​ | ​ | ​ | 8.5% | ​ | ​ |
| 4           | ​ | ​ | ​ | ​ | 31,172  | ​   | ​ | ​ | ​ | ​ | 12.3%   | ​  | ​ | ​ | ​ | ​ | 18,299 | ​ | ​ | ​ | ​ | ​ | 7.8% | ​ | ​ |
| 5           | ​ | ​ | ​ | ​ | 3,529   | ​   | ​ | ​ | ​ | ​ | 1.4%    | ​  | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 0.0% | ​ | ​ |
| ​     | ​ | ​ | ​ | $       | 253,877 | ​   | ​ | ​ | ​ | ​ | 100.0%  | ​  | ​ | ​ | ​ | $ | 234,797 | ​ | ​ | ​ | ​ | ​ | 100.0% | ​ | ​ |
| ​     |

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| ​ | Report of Independent Registered Public Accounting Firm                                                                                        | ​ | ​ | ​ | ​ | 72 | ​ | ​ |
|---------|------------------------------------------------------------------------------------------------------------------------------------------------|---------|---------|---------|---------|----|---------|---------|
| ​ | Consolidated Statements of Assets and Liabilities as of December 31, 2018 and December 31, 2017                                      | ​ | ​ | ​ | ​ | 73 | ​ | ​ |
| ​ | Consolidated Statements of Operations for the year ended December 31, 2018, December 31, 2017, and December 31, 2016            | ​ | ​ | ​ | ​ | 74 | ​ | ​ |
| ​ | Consolidated Statements of Changes in Net Assets for the year ended December 31, 2018, December 31, 2017, and December 31, 2016 | ​ | ​ | ​ | ​ | 75 | ​ | ​ |
| ​ | Consolidated Statements of Cash Flows for the year ended December 31, 2018, December 31, 2017, and December 31, 2016            | ​ | ​ | ​ | ​ | 76 | ​ | ​ |
| ​ | Consolidated Schedule of Investments as of December 31, 2018 and December 31, 2017                                                   | ​ | ​ | ​ | ​ | 77 | ​ | ​ |
| ​ | Notes to the Consolidated Financial Statements                                                                                                 | ​ | ​ | ​ | ​ | 85 | ​ | ​ |

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| ​                                                                                                                              | ​ | ​ | As ofDecember 31, 2018 | ​ | ​      | As ofDecember 31, 2017 | ​ |
|--------------------------------------------------------------------------------------------------------------------------------------|---------|---------|------------------------|---------|--------------|------------------------|---------|
| Assets                                                                                                                               | ​ | ​ | ​                | ​ | ​      | ​                | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Portfolio investments, at fair value                                                                                                 | ​ | ​ | ​                | ​ | ​      | ​                | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Non-controlled, non-affiliated investments, at fair value (cost of $212,280,172 and $265,675,598, respectively)                      | ​ | ​ | ​                | $       | 205,411,779  | ​                | ​ | ​ | ​ | $ | 252,325,403 | ​ | ​ |
| Non-controlled, affiliated investments, at fair value (cost of  $26,385,612 and $51,734,635, respectively)                     | ​ | ​ | ​                | ​ | 12,980,016   | ​                | ​ | ​ | ​ | ​ | 19,972,905 | ​ | ​ |
| Controlled, affiliated investments, at fair value (cost $15,212,562 and $15,806,301, respectively)                                   | ​ | ​ | ​                | ​ | 16,406,021   | ​                | ​ | ​ | ​ | ​ | 15,256,237 | ​ | ​ |
| Cash                                                                                                                                 | ​ | ​ | ​                | ​ | 11,049,499   | ​                | ​ | ​ | ​ | ​ | 13,882,956 | ​ | ​ |
| Dividends and interest receivable                                                                                                    | ​ | ​ | ​                | ​ | 454,883      | ​                | ​ | ​ | ​ | ​ | 1,942,300 | ​ | ​ |
| Receivable for investments sold                                                                                                      | ​ | ​ | ​                | ​ | 644,733      | ​                | ​ | ​ | ​ | ​ | 669,733 | ​ | ​ |
| Deferred financing costs                                                                                                             | ​ | ​ | ​                | ​ | 1,366,393    | ​                | ​ | ​ | ​ | ​ | 514,241 | ​ | ​ |
| Deferred tax asset                                                                                                                   | ​ | ​ | ​                | ​ | 5,385,694    | ​                | ​ | ​ | ​ | ​ | 4,934,962 | ​ | ​ |
| Income tax asset                                                                                                                     | ​ | ​ | ​                | ​ | —      | ​                | ​ | ​ | ​ | ​ | 748,408 | ​ | ​ |
| Prepaid expenses and other assets                                                                                                    | ​ | ​ | ​                | ​ | 79,410       | ​                | ​ | ​ | ​ | ​ | 79,005 | ​ | ​ |
| Total Assets                                                                                                                         | ​ | ​ | ​                | $       | 253,778,428  | ​                | ​ | ​ | ​ | $ | 310,326,150 | ​ | ​ |
| Liabilities                                                                                                                          | ​ | ​ | ​                | ​ | ​      | ​                | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Credit facility payable                                                                                                              | ​ | ​ | ​                | $       | 28,536,441   | ​                | ​ | ​ | ​ | $ | 89,703,273 | ​ | ​ |
| Notes payable (net of deferred note offering costs of  $855,433 and $1,252,165, respectively)                                  | ​ | ​ | ​                | ​ | 54,144,567   | ​                | ​ | ​ | ​ | ​ | 53,747,835 | ​ | ​ |
| Payable for investments purchased                                                                                                    | ​ | ​ | ​                | ​ | 18,550,000   | ​                | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Other accrued expenses and liabilities                                                                                               | ​ | ​ | ​                | ​ | 535,096      | ​                | ​ | ​ | ​ | ​ | 447,589 | ​ | ​ |
| Directors’ fees payable                                                                                                        | ​ | ​ | ​                | ​ | 36,125       | ​                | ​ | ​ | ​ | ​ | 68,917 | ​ | ​ |
| Professional fees payable                                                                                                            | ​ | ​ | ​                | ​ | 554,173      | ​                | ​ | ​ | ​ | ​ | 548,455 | ​ | ​ |
| Interest and credit facility expense payable                                                                                         | ​ | ​ | ​                | ​ | 1,069,139    | ​                | ​ | ​ | ​ | ​ | 1,248,791 | ​ | ​ |
| Management fee payable                                                                                                               | ​ | ​ | ​                | ​ | 765,659      | ​                | ​ | ​ | ​ | ​ | 1,265,172 | ​ | ​ |
| Income-based incentive fees payable                                                                                                  | ​ | ​ | ​                | ​ | 890,796      | ​                | ​ | ​ | ​ | ​ | 1,294,985 | ​ | ​ |
| Distributions payable                                                                                                                | ​ | ​ | ​                | ​ | 2,433,102    | ​                | ​ | ​ | ​ | ​ | 3,561,305 | ​ | ​ |
| Unearned structuring fee revenue                                                                                                     | ​ | ​ | ​                | ​ | 81,643       | ​                | ​ | ​ | ​ | ​ | 725,653 | ​ | ​ |
| Income tax liability                                                                                                                 | ​ | ​ | ​                | ​ | 379,155      | ​                | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Total Liabilities                                                                                                                    | ​ | ​ | ​                | ​ | 107,975,896  | ​                | ​ | ​ | ​ | ​ | 152,611,975 | ​ | ​ |
| Commitments and Contingencies (Note 12)                                                                                              | ​ | ​ | ​                | ​ | ​      | ​                | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Net Assets                                                                                                                           | ​ | ​ | ​                | ​ | ​      | ​                | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Common stock, par value $0.001 per share (100,000,000 shares authorized, 13,105,295 and 14,222,945 shares outstanding, respectively) | ​ | ​ | ​                | ​ | 13,105       | ​                | ​ | ​ | ​ | ​ | 14,223 | ​ | ​ |
| Additional paid-in capital                                                                                                           | ​ | ​ | ​                | ​ | 198,594,662  | ​                | ​ | ​ | ​ | ​ | 206,570,701 | ​ | ​ |
| Distributable earnings (accumulated loss)                                                                                            | ​ | ​ | ​                | ​ | (52,805,235) | ​                | ​ | ​ | ​ | ​ | (48,870,749) | ​ | ​ |
| Total Net Assets                                                                                                                     | ​ | ​ | ​                | ​ | 145,802,532  | ​                | ​ | ​ | ​ | ​ | 157,714,175 | ​ | ​ |
| Total Liabilities and Net Assets                                                                                                     | ​ | ​ | ​                | $       | 253,778,428  | ​                | ​ | ​ | ​ | $ | 310,326,150 | ​ | ​ |
| Net Asset Value Per Share                                                                                                            | ​ | ​ | ​                | $       | 11.13        | ​                | ​ | ​ | ​ | $ | 11.09 | ​ | ​ |

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| ​                                                                                                          | ​ | ​ | For the year ended December 31, 2018 | ​ | ​      | For the year ended December 31, 2017 | ​ | ​ | For the year ended December 31, 2016 | ​ |
|------------------------------------------------------------------------------------------------------------------|---------|---------|--------------------------------------|---------|--------------|--------------------------------------|---------|---------|--------------------------------------|---------|
| Investment Income:                                                                                               | ​ | ​ | ​                              | ​ | ​      | ​                              | ​ | ​ | ​                              | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| From non-controlled, non-affiliated investments:                                                                 | ​ | ​ | ​                              | ​ | ​      | ​                              | ​ | ​ | ​                              | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Interest income from portfolio investments                                                                       | ​ | ​ | ​                              | $       | 22,735,612   | ​                              | ​ | ​ | ​                              | $       | 23,917,956 | ​ | ​ | ​ | ​ | $ | 25,178,890 | ​ | ​ |
| Paid-in-kind interest income from portfolio investments                                                          | ​ | ​ | ​                              | ​ | 504,139      | ​                              | ​ | ​ | ​                              | ​ | 1,156,486 | ​ | ​ | ​ | ​ | ​ | 3,182,683 | ​ | ​ |
| Other income from portfolio investments                                                                          | ​ | ​ | ​                              | ​ | 2,951,990    | ​                              | ​ | ​ | ​                              | ​ | 2,228,104 | ​ | ​ | ​ | ​ | ​ | 2,475,976 | ​ | ​ |
| Dividend income from portfolio investments                                                                       | ​ | ​ | ​                              | ​ | 123,024      | ​                              | ​ | ​ | ​                              | ​ | 171,083 | ​ | ​ | ​ | ​ | ​ | 82,777 | ​ | ​ |
| From non-controlled, affiliated investments:                                                                     | ​ | ​ | ​                              | ​ | ​      | ​                              | ​ | ​ | ​                              | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Interest income from portfolio investments                                                                       | ​ | ​ | ​                              | ​ | 306,204      | ​                              | ​ | ​ | ​                              | ​ | 1,318,924 | ​ | ​ | ​ | ​ | ​ | 2,742,054 | ​ | ​ |
| Paid in-kind income from portfolio investments                                                                   | ​ | ​ | ​                              | ​ | 406,622      | ​                              | ​ | ​ | ​                              | ​ | 2,209,418 | ​ | ​ | ​ | ​ | ​ | 2,365,373 | ​ | ​ |
| Other income from portfolio investments                                                                          | ​ | ​ | ​                              | ​ | —      | ​                              | ​ | ​ | ​                              | ​ | — | ​ | ​ | ​ | ​ | ​ | 2,352,766 | ​ | ​ |
| From controlled, affiliated investments:                                                                         | ​ | ​ | ​                              | ​ | ​      | ​                              | ​ | ​ | ​                              | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Interest income from portfolio investments                                                                       | ​ | ​ | ​                              | ​ | 1,940,389    | ​                              | ​ | ​ | ​                              | ​ | 1,665,409 | ​ | ​ | ​ | ​ | ​ | 1,566,173 | ​ | ​ |
| Paid in-kind income from portfolio investments                                                                   | ​ | ​ | ​                              | ​ | —      | ​                              | ​ | ​ | ​                              | ​ | 684,129 | ​ | ​ | ​ | ​ | ​ | 655,907 | ​ | ​ |
| Other income from portfolio investments                                                                          | ​ | ​ | ​                              | ​ | —      | ​                              | ​ | ​ | ​                              | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Total investment income                                                                                          | ​ | ​ | ​                              | ​ | 28,967,980   | ​                              | ​ | ​ | ​                              | ​ | 33,351,509 | ​ | ​ | ​ | ​ | ​ | 40,602,599 | ​ | ​ |
| Expenses:                                                                                                        | ​ | ​ | ​                              | ​ | ​      | ​                              | ​ | ​ | ​                              | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Management fees                                                                                                  | ​ | ​ | ​                              | ​ | 4,133,136    | ​                              | ​ | ​ | ​                              | ​ | 4,975,349 | ​ | ​ | ​ | ​ | ​ | 5,209,684 | ​ | ​ |
| Income-based incentive fees                                                                                      | ​ | ​ | ​                              | ​ | (404,189)    | ​                              | ​ | ​ | ​                              | ​ | 638,244 | ​ | ​ | ​ | ​ | ​ | 3,255,167 | ​ | ​ |
| Professional fees                                                                                                | ​ | ​ | ​                              | ​ | 1,632,155    | ​                              | ​ | ​ | ​                              | ​ | 1,248,715 | ​ | ​ | ​ | ​ | ​ | 1,227,977 | ​ | ​ |
| Valuation services                                                                                               | ​ | ​ | ​                              | ​ | 205,624      | ​                              | ​ | ​ | ​                              | ​ | 314,432 | ​ | ​ | ​ | ​ | ​ | 236,904 | ​ | ​ |
| Interest and credit facility expense                                                                             | ​ | ​ | ​                              | ​ | 6,649,567    | ​                              | ​ | ​ | ​                              | ​ | 6,434,924 | ​ | ​ | ​ | ​ | ​ | 5,657,154 | ​ | ​ |
| Amortization of deferred financing costs                                                                         | ​ | ​ | ​                              | ​ | 546,157      | ​                              | ​ | ​ | ​                              | ​ | 912,710 | ​ | ​ | ​ | ​ | ​ | 1,154,343 | ​ | ​ |
| Directors’ fees                                                                                            | ​ | ​ | ​                              | ​ | 428,161      | ​                              | ​ | ​ | ​                              | ​ | 341,680 | ​ | ​ | ​ | ​ | ​ | 296,809 | ​ | ​ |
| Insurance expense                                                                                                | ​ | ​ | ​                              | ​ | 226,658      | ​                              | ​ | ​ | ​                              | ​ | 239,048 | ​ | ​ | ​ | ​ | ​ | 264,209 | ​ | ​ |
| Amortization of deferred note offering costs                                                                     | ​ | ​ | ​                              | ​ | 438,732      | ​                              | ​ | ​ | ​                              | ​ | 473,768 | ​ | ​ | ​ | ​ | ​ | 193,357 | ​ | ​ |
| Consulting fees                                                                                                  | ​ | ​ | ​                              | ​ | 655,923      | ​                              | ​ | ​ | ​                              | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Other expenses                                                                                                   | ​ | ​ | ​                              | ​ | 959,306      | ​                              | ​ | ​ | ​                              | ​ | 778,920 | ​ | ​ | ​ | ​ | ​ | 697,809 | ​ | ​ |
| Total expenses                                                                                                   | ​ | ​ | ​                              | ​ | 15,471,230   | ​                              | ​ | ​ | ​                              | ​ | 16,357,790 | ​ | ​ | ​ | ​ | ​ | 18,193,413 | ​ | ​ |
| Waiver of management fees                                                                                        | ​ | ​ | ​                              | ​ | (419,640)    | ​                              | ​ | ​ | ​                              | ​ | (1,330,420) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Net expenses                                                                                                     | ​ | ​ | ​                              | ​ | 15,051,590   | ​                              | ​ | ​ | ​                              | ​ | 15,027,370 | ​ | ​ | ​ | ​ | ​ | 18,193,413 | ​ | ​ |
| Net investment income                                                                                            | ​ | ​ | ​                              | ​ | 13,916,390   | ​                              | ​ | ​ | ​                              | ​ | 18,324,139 | ​ | ​ | ​ | ​ | ​ | 22,409,186 | ​ | ​ |
| Realized Gain (Loss) and Net Change in Unrealized Appreciation (Depreciation) From Portfolio Investments         | ​ | ​ | ​                              | ​ | ​      | ​                              | ​ | ​ | ​                              | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Net realized gain (loss) on:                                                                                     | ​ | ​ | ​                              | ​ | ​      | ​                              | ​ | ​ | ​                              | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Non-controlled, non-affiliated investments                                                                       | ​ | ​ | ​                              | ​ | (10,862,366) | ​                              | ​ | ​ | ​                              | ​ | (11,434,891) | ​ | ​ | ​ | ​ | ​ | (4,018,220) | ​ | ​ |
| Non-controlled, affiliated investments                                                                           | ​ | ​ | ​                              | ​ | (24,543,812) | ​                              | ​ | ​ | ​                              | ​ | — | ​ | ​ | ​ | ​ | ​ | 11,019,205 | ​ | ​ |
| Controlled, affiliated investments                                                                               | ​ | ​ | ​                              | ​ | —      | ​                              | ​ | ​ | ​                              | ​ | — | ​ | ​ | ​ | ​ | ​ | (11,282,968) | ​ | ​ |
| Foreign currency transactions                                                                                    | ​ | ​ | ​                              | ​ | 46,940       | ​                              | ​ | ​ | ​                              | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Net realized gain (loss) from portfolio investments                                                              | ​ | ​ | ​                              | ​ | (35,359,238) | ​                              | ​ | ​ | ​                              | ​ | (11,434,891) | ​ | ​ | ​ | ​ | ​ | (4,281,983) | ​ | ​ |
| Net change in unrealized appreciation (depreciation) on:                                                         | ​ | ​ | ​                              | ​ | ​      | ​                              | ​ | ​ | ​                              | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Non-controlled, non-affiliated investments                                                                       | ​ | ​ | ​                              | ​ | 6,481,802    | ​                              | ​ | ​ | ​                              | ​ | (4,593,273) | ​ | ​ | ​ | ​ | ​ | (10,390,732) | ​ | ​ |
| Non-controlled, affiliated investments                                                                           | ​ | ​ | ​                              | ​ | 18,356,134   | ​                              | ​ | ​ | ​                              | ​ | (24,121,074) | ​ | ​ | ​ | ​ | ​ | (10,458,180) | ​ | ​ |
| Controlled, affiliated investments                                                                               | ​ | ​ | ​                              | ​ | 1,743,523    | ​                              | ​ | ​ | ​                              | ​ | 115,477 | ​ | ​ | ​ | ​ | ​ | 10,875,915 | ​ | ​ |
| Foreign currency translation                                                                                     | ​ | ​ | ​                              | ​ | (64,288)     | ​                              | ​ | ​ | ​                              | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Net change in unrealized appreciation (depreciation) from portfolio investments and foreign currency translation | ​ | ​ | ​                              | ​ | 26,517,171   | ​                              | ​ | ​ | ​                              | ​ | (28,598,870) | ​ | ​ | ​ | ​ | ​ | (9,972,997) | ​ | ​ |
| Benefit (Provision) for income taxes on unrealized gain (loss) on investments                                    | ​ | ​ | ​                              | ​ | 447,809      | ​                              | ​ | ​ | ​                              | ​ | 2,607,880 | ​ | ​ | ​ | ​ | ​ | 635,580 | ​ | ​ |
| Net realized gain (loss) and net change in unrealized appreciation (depreciation) from portfolio investments     | ​ | ​ | ​                              | ​ | (8,394,258)  | ​                              | ​ | ​ | ​                              | ​ | (37,425,881) | ​ | ​ | ​ | ​ | ​ | (13,619,400) | ​ | ​ |
| Net Increase (Decrease) in Net Assets Resulting from Operations                                                  | ​ | ​ | ​                              | $       | 5,522,132    | ​                              | ​ | ​ | ​                              | $       | (19,101,742) | ​ | ​ | ​ | ​ | $ | 8,789,786 | ​ | ​ |
| Basic and diluted:                                                                                               | ​ | ​ | ​                              | ​ | ​      | ​                              | ​ | ​ | ​                              | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Net investment income per share                                                                                  | ​ | ​ | ​                              | $       | 1.01         | ​                              | ​ | ​ | ​                              | $       | 1.32 | ​ | ​ | ​ | ​ | $ | 1.66 | ​ | ​ |
| Earnings (loss) per share                                                                                        | ​ | ​ | ​                              | $       | 0.40         | ​                              | ​ | ​ | ​                              | $       | (1.37) | ​ | ​ | ​ | ​ | $ | 0.65 | ​ | ​ |
| Weighted Average Shares of Common Stock Outstanding                                                              | ​ | ​ | ​                              | ​ | 13,721,109   | ​                              | ​ | ​ | ​                              | ​ | 13,928,869 | ​ | ​ | ​ | ​ | ​ | 13,496,128 | ​ | ​ |

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| ​                                                                                              | ​ | ​ | For the year ended December 31, 2018 | ​ | ​      | For the year ended December 31, 2017 | ​ | ​ | For the year ended December 31, 2016 | ​ |
|------------------------------------------------------------------------------------------------------|---------|---------|--------------------------------------|---------|--------------|--------------------------------------|---------|---------|--------------------------------------|---------|
| Increase (decrease) in net assets resulting from operations                                          | ​ | ​ | ​                              | ​ | ​      | ​                              | ​ | ​ | ​                              | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Net investment income                                                                                | ​ | ​ | ​                              | $       | 13,916,390   | ​                              | ​ | ​ | ​                              | $       | 18,324,139 | ​ | ​ | ​ | ​ | $ | 22,409,186 | ​ | ​ |
| Net realized gain (loss) on investments and foreign currency transactions                            | ​ | ​ | ​                              | ​ | (35,359,238) | ​                              | ​ | ​ | ​                              | ​ | (11,434,891) | ​ | ​ | ​ | ​ | ​ | (4,281,983) | ​ | ​ |
| Net change in unrealized appreciation (depreciation) on investments and foreign currency translation | ​ | ​ | ​                              | ​ | 26,517,171   | ​                              | ​ | ​ | ​                              | ​ | (28,598,870) | ​ | ​ | ​ | ​ | ​ | (9,972,997) | ​ | ​ |
| Benefit (Provision) for income taxes on unrealized gain (loss) on investments                        | ​ | ​ | ​                              | ​ | 447,809      | ​                              | ​ | ​ | ​                              | ​ | 2,607,880 | ​ | ​ | ​ | ​ | ​ | 635,580 | ​ | ​ |
| Net increase (decrease) in net assets resulting from operations                                      | ​ | ​ | ​                              | ​ | 5,522,132    | ​                              | ​ | ​ | ​                              | ​ | (19,101,742) | ​ | ​ | ​ | ​ | ​ | 8,789,786 | ​ | ​ |
| Capital transactions                                                                                 | ​ | ​ | ​                              | ​ | ​      | ​                              | ​ | ​ | ​                              | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Offering costs                                                                                       | ​ | ​ | ​                              | ​ | —      | ​                              | ​ | ​ | ​                              | ​ | — | ​ | ​ | ​ | ​ | ​ | (165,635) | ​ | ​ |
| Issuance of common stock (0, 808,161 and 0 shares, respectively)                                     | ​ | ​ | ​                              | ​ | —      | ​                              | ​ | ​ | ​                              | ​ | 10,853,602 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Repurchase of common stock (1,117,650, 36,849 and 65,133 shares, respectively)                       | ​ | ​ | ​                              | ​ | (7,541,360)  | ​                              | ​ | ​ | ​                              | ​ | (342,510) | ​ | ​ | ​ | ​ | ​ | (775,622) | ​ | ​ |
| Net increase (decrease) in net assets resulting from capital transactions                            | ​ | ​ | ​                              | ​ | (7,541,360)  | ​                              | ​ | ​ | ​                              | ​ | 10,511,092 | ​ | ​ | ​ | ​ | ​ | (941,257) | ​ | ​ |
| Distributions to shareholders                                                                        | ​ | ​ | ​                              | ​ | (9,892,415)  | ​                              | ​ | ​ | ​                              | ​ | (18,219,766) | ​ | ​ | ​ | ​ | ​ | (18,356,149) | ​ | ​ |
| Total increase (decrease) in net assets                                                              | ​ | ​ | ​                              | ​ | (11,911,643) | ​                              | ​ | ​ | ​                              | ​ | (26,810,416) | ​ | ​ | ​ | ​ | ​ | (10,507,620) | ​ | ​ |
| Net assets at beginning of year                                                                      | ​ | ​ | ​                              | ​ | 157,714,175  | ​                              | ​ | ​ | ​                              | ​ | 184,524,591 | ​ | ​ | ​ | ​ | ​ | 195,032,211 | ​ | ​ |
| Net assets at end of year                                                                            | ​ | ​ | ​                              | $       | 145,802,532  | ​                              | ​ | ​ | ​                              | $       | 157,714,175 | ​ | ​ | ​ | ​ | $ | 184,524,591 | ​ | ​ |
| Dividends declared per common share:                                                                 | ​ | ​ | ​                              | $       | 0.720        | ​                              | ​ | ​ | ​                              | $       | 1.300 | ​ | ​ | ​ | ​ | $ | 1.360 | ​ | ​ |

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TABLE OF CONTENTS​

| ​                                                                                                                                          | ​ | ​ | For the year ended December 31, 2018 | ​ | ​       | For the year ended December 31, 2017 | ​ | ​ | For the year ended December 31, 2016 | ​ |
|--------------------------------------------------------------------------------------------------------------------------------------------------|---------|---------|--------------------------------------|---------|---------------|--------------------------------------|---------|---------|--------------------------------------|---------|
| Cash Flows from Operating Activities                                                                                                             | ​ | ​ | ​                              | ​ | ​       | ​                              | ​ | ​ | ​                              | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Net increase/(decrease) in net assets resulting from operations                                                                                  | ​ | ​ | ​                              | $       | 5,522,132     | ​                              | ​ | ​ | ​                              | $       | (19,101,742) | ​ | ​ | ​ | ​ | $ | 8,789,786 | ​ | ​ |
| Adjustments to reconcile net increase/(decrease) in net assets resulting from operations to net cash provided by (used in) operating activities: | ​ | ​ | ​                              | ​ | ​       | ​                              | ​ | ​ | ​                              | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Net realized loss from portfolio investments                                                                                                     | ​ | ​ | ​                              | ​ | 35,406,178    | ​                              | ​ | ​ | ​                              | ​ | 11,434,891 | ​ | ​ | ​ | ​ | ​ | 4,281,983 | ​ | ​ |
| Net change in unrealized (appreciation) depreciation of portfolio investments                                                                    | ​ | ​ | ​                              | ​ | (26,581,459)  | ​                              | ​ | ​ | ​                              | ​ | 28,598,870 | ​ | ​ | ​ | ​ | ​ | 9,972,997 | ​ | ​ |
| Deferred tax asset                                                                                                                               | ​ | ​ | ​                              | ​ | (450,732)     | ​                              | ​ | ​ | ​                              | ​ | (3,670,151) | ​ | ​ | ​ | ​ | ​ | 117,597 | ​ | ​ |
| Paid in-kind interest income from portfolio investments                                                                                          | ​ | ​ | ​                              | ​ | (910,761)     | ​                              | ​ | ​ | ​                              | ​ | (4,050,033) | ​ | ​ | ​ | ​ | ​ | (6,203,963) | ​ | ​ |
| Accretion of discount on debt securities                                                                                                         | ​ | ​ | ​                              | ​ | (923,726)     | ​                              | ​ | ​ | ​                              | ​ | (1,905,751) | ​ | ​ | ​ | ​ | ​ | (1,225,834) | ​ | ​ |
| Purchases of portfolio investments                                                                                                               | ​ | ​ | ​                              | ​ | (104,847,346) | ​                              | ​ | ​ | ​                              | ​ | (135,508,569) | ​ | ​ | ​ | ​ | ​ | (145,561,983) | ​ | ​ |
| Net proceeds from sales/return of capital of portfolio investments                                                                               | ​ | ​ | ​                              | ​ | 150,613,843   | ​                              | ​ | ​ | ​                              | ​ | 90,148,997 | ​ | ​ | ​ | ​ | ​ | 158,805,461 | ​ | ​ |
| Amortization of deferred financing costs                                                                                                         | ​ | ​ | ​                              | ​ | 546,157       | ​                              | ​ | ​ | ​                              | ​ | 912,710 | ​ | ​ | ​ | ​ | ​ | 1,154,343 | ​ | ​ |
| Amortization of deferred note offering costs                                                                                                     | ​ | ​ | ​                              | ​ | 438,732       | ​                              | ​ | ​ | ​                              | ​ | 473,768 | ​ | ​ | ​ | ​ | ​ | 193,357 | ​ | ​ |
| (Increase) decrease in operating assets:                                                                                                         | ​ | ​ | ​                              | ​ | ​       | ​                              | ​ | ​ | ​                              | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Dividends and interest receivable                                                                                                                | ​ | ​ | ​                              | ​ | 1,487,417     | ​                              | ​ | ​ | ​                              | ​ | 1,298,340 | ​ | ​ | ​ | ​ | ​ | (633,435) | ​ | ​ |
| Receivable for investments sold                                                                                                                  | ​ | ​ | ​                              | ​ | 25,000        | ​                              | ​ | ​ | ​                              | ​ | 1,469,730 | ​ | ​ | ​ | ​ | ​ | (2,139,463) | ​ | ​ |
| Income tax asset                                                                                                                                 | ​ | ​ | ​                              | ​ | 748,408       | ​                              | ​ | ​ | ​                              | ​ | (748,408) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Prepaid expenses and other assets                                                                                                                | ​ | ​ | ​                              | ​ | (405)         | ​                              | ​ | ​ | ​                              | ​ | 21,765 | ​ | ​ | ​ | ​ | ​ | 12,960 | ​ | ​ |
| Increase (decrease) in operating liabilities:                                                                                                    | ​ | ​ | ​                              | ​ | ​       | ​                              | ​ | ​ | ​                              | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Payable for investments purchased                                                                                                                | ​ | ​ | ​                              | ​ | 18,550,000    | ​                              | ​ | ​ | ​                              | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Other accrued expenses and liabilities                                                                                                           | ​ | ​ | ​                              | ​ | 87,507        | ​                              | ​ | ​ | ​                              | ​ | 165,424 | ​ | ​ | ​ | ​ | ​ | 10,364 | ​ | ​ |
| Directors’ fees payable                                                                                                                    | ​ | ​ | ​                              | ​ | (32,792)      | ​                              | ​ | ​ | ​                              | ​ | (26,083) | ​ | ​ | ​ | ​ | ​ | 57,975 | ​ | ​ |
| Professional fees payable                                                                                                                        | ​ | ​ | ​                              | ​ | 5,718         | ​                              | ​ | ​ | ​                              | ​ | 216,588 | ​ | ​ | ​ | ​ | ​ | (149,466) | ​ | ​ |
| Interest and credit facility expense payable                                                                                                     | ​ | ​ | ​                              | ​ | (179,652)     | ​                              | ​ | ​ | ​                              | ​ | 240,664 | ​ | ​ | ​ | ​ | ​ | 194,905 | ​ | ​ |
| Management fee payable                                                                                                                           | ​ | ​ | ​                              | ​ | (499,513)     | ​                              | ​ | ​ | ​                              | ​ | (36,419) | ​ | ​ | ​ | ​ | ​ | (622) | ​ | ​ |
| Income-based incentive fees payable                                                                                                              | ​ | ​ | ​                              | ​ | (404,189)     | ​                              | ​ | ​ | ​                              | ​ | (776,676) | ​ | ​ | ​ | ​ | ​ | 989,864 | ​ | ​ |
| Unearned structuring fee revenue                                                                                                                 | ​ | ​ | ​                              | ​ | (644,010)     | ​                              | ​ | ​ | ​                              | ​ | (449,666) | ​ | ​ | ​ | ​ | ​ | 485,742 | ​ | ​ |
| Income tax liability                                                                                                                             | ​ | ​ | ​                              | ​ | 379,155       | ​                              | ​ | ​ | ​                              | ​ | (182,699) | ​ | ​ | ​ | ​ | ​ | (660,113) | ​ | ​ |
| Net cash provided by (used in) operating activities                                                                                              | ​ | ​ | ​                              | ​ | 78,335,662    | ​                              | ​ | ​ | ​                              | ​ | (31,474,450) | ​ | ​ | ​ | ​ | ​ | 28,492,455 | ​ | ​ |
| Cash Flows from Financing Activities                                                                                                             | ​ | ​ | ​                              | ​ | ​       | ​                              | ​ | ​ | ​                              | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Issuance of common stock                                                                                                                         | ​ | ​ | ​                              | ​ | —       | ​                              | ​ | ​ | ​                              | ​ | 10,853,602 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Financing costs paid                                                                                                                             | ​ | ​ | ​                              | ​ | (1,398,309)   | ​                              | ​ | ​ | ​                              | ​ | (139,144) | ​ | ​ | ​ | ​ | ​ | (258,269) | ​ | ​ |
| Offering costs paid                                                                                                                              | ​ | ​ | ​                              | ​ | (42,000)      | ​                              | ​ | ​ | ​                              | ​ | (230,871) | ​ | ​ | ​ | ​ | ​ | (697,432) | ​ | ​ |
| Proceeds from credit facility payable                                                                                                            | ​ | ​ | ​                              | ​ | 63,855,160    | ​                              | ​ | ​ | ​                              | ​ | 117,820,000 | ​ | ​ | ​ | ​ | ​ | 116,375,000 | ​ | ​ |
| Repayments of credit facility payable                                                                                                            | ​ | ​ | ​                              | ​ | (124,957,704) | ​                              | ​ | ​ | ​                              | ​ | (67,250,000) | ​ | ​ | ​ | ​ | ​ | (140,746,465) | ​ | ​ |
| Proceeds from notes payable                                                                                                                      | ​ | ​ | ​                              | ​ | —       | ​                              | ​ | ​ | ​                              | ​ | — | ​ | ​ | ​ | ​ | ​ | 15,000,000 | ​ | ​ |
| Distributions paid to shareholders                                                                                                               | ​ | ​ | ​                              | ​ | (11,020,618)  | ​                              | ​ | ​ | ​                              | ​ | (19,245,277) | ​ | ​ | ​ | ​ | ​ | (18,365,033) | ​ | ​ |
| Repurchase of common stock                                                                                                                       | ​ | ​ | ​                              | ​ | (7,541,360)   | ​                              | ​ | ​ | ​                              | ​ | (342,510) | ​ | ​ | ​ | ​ | ​ | (775,622) | ​ | ​ |
| Net cash provided by (used in) financing activities                                                                                              | ​ | ​ | ​                              | ​ | (81,104,831)  | ​                              | ​ | ​ | ​                              | ​ | 41,465,800 | ​ | ​ | ​ | ​ | ​ | (29,467,821) | ​ | ​ |
| Effect of exchange rate changes on cash denominated in foreign currency                                                                          | ​ | ​ | ​                              | ​ | (64,288)      | ​                              | ​ | ​ | ​                              | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Increase (decrease) in cash and cash equivalents                                                                                                 | ​ | ​ | ​                              | ​ | (2,833,457)   | ​                              | ​ | ​ | ​                              | ​ | 9,991,350 | ​ | ​ | ​ | ​ | ​ | (975,366) | ​ | ​ |
| Cash at beginning of year                                                                                                                        | ​ | ​ | ​                              | ​ | 13,882,956    | ​                              | ​ | ​ | ​                              | ​ | 3,891,606 | ​ | ​ | ​ | ​ | ​ | 4,866,972 | ​ | ​ |
| Cash and Cash Equivalents at End of Year                                                                                                         | ​ | ​ | ​                              | $       | 11,049,499    | ​                              | ​ | ​ | ​                              | $       | 13,882,956 | ​ | ​ | ​ | ​ | $ | 3,891,606 | ​ | ​ |
| Supplemental and non-cash financing activities:                                                                                                  | ​ | ​ | ​                              | ​ | ​       | ​                              | ​ | ​ | ​                              | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Cash paid during the year for interest                                                                                                           | ​ | ​ | ​                              | $       | 6,829,219     | ​                              | ​ | ​ | ​                              | $       | 6,194,260 | ​ | ​ | ​ | ​ | $ | 5,462,249 | ​ | ​ |
| Accrued offering costs                                                                                                                           | ​ | ​ | ​                              | $       | 2,485         | ​                              | ​ | ​ | ​                              | $       | 2,485 | ​ | ​ | ​ | ​ | $ | 2,485 | ​ | ​ |
| Accrued distributions payable                                                                                                                    | ​ | ​ | ​                              | $       | 2,433,102     | ​                              | ​ | ​ | ​                              | $       | 3,561,305 | ​ | ​ | ​ | ​ | $ | 4,586,816 | ​ | ​ |

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TABLE OF CONTENTS​

| Company(+)***                                                                                 | ​ | ​ | Industry                      | ​ | ​ | Spread Above Index   | ​ | ​ | Base Rate Floor | ​ | ​ | Interest Rate | ​ | ​ | Maturity Date | ​ | ​ | No. Shares/​Principal Amount | ​ | ​ | Cost(1) | ​ | ​    | Fair Value | ​ | ​ | % of Net Assets | ​ |
|-----------------------------------------------------------------------------------------------|---------|---------|-------------------------------|---------|---------|----------------------|---------|---------|-----------------|---------|---------|---------------|---------|---------|---------------|---------|---------|------------------------------------|---------|---------|---------|---------|------------|------------|---------|---------|-----------------|---------|
| Investments in Non-Controlled, Non-Affiliated Portfolio Companies — 140.89% | ​ |
| Senior Secured – First Lien — 106.14%                     | ​ |
| Black Diamond Oilfield Rentals, LLC(2),(3),(15)                                               | ​ | ​ | Oil & Gas Services        | ​ | ​ | LIBOR + 6.50%        | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 8.90%   | ​                            | ​ | ​ | ​ | ​ | 12/17/2020 | ​    | ​ | ​ | ​         | ​ | 11,385,109 | ​ | ​ | ​ | ​ | $ | 11,385,109 | ​ | ​ | ​ | ​ | $ | 11,382,254 | ​ | ​ | ​ | ​ | ​ | 7.81% | ​ | ​ |
| Cambium Learning Group, Inc.(3),(10)                                                          | ​ | ​ | Technology & Telecom      | ​ | ​ | LIBOR + 4.50%        | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 7.31%   | ​                            | ​ | ​ | ​ | ​ | 12/18/2025 | ​    | ​ | ​ | ​         | ​ | 4,000,000 | ​ | ​ | ​ | ​ | ​ | 3,800,000 | ​ | ​ | ​ | ​ | ​ | 3,800,000 | ​ | ​ | ​ | ​ | ​ | 2.61% | ​ | ​ |
| CGGR Operations Holdings Corporation(2),(3),(8)                                               | ​ | ​ | Business Services             | ​ | ​ | LIBOR + 11.5%        | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 13.90%  | ​                            | ​ | ​ | ​ | ​ | 9/30/2023  | ​    | ​ | ​ | ​         | ​ | 13,431,579 | ​ | ​ | ​ | ​ | ​ | 13,324,053 | ​ | ​ | ​ | ​ | ​ | 13,431,579 | ​ | ​ | ​ | ​ | ​ | 9.21% | ​ | ​ |
| ​                                                                                       | ​ | ​ | ​                       | ​ | ​ | LIBOR + 7.0%         | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 9.40%   | ​                            | ​ | ​ | ​ | ​ | 9/30/2022  | ​    | ​ | ​ | ​         | ​ | 9,468,421 | ​ | ​ | ​ | ​ | ​ | 9,397,345 | ​ | ​ | ​ | ​ | ​ | 9,468,421 | ​ | ​ | ​ | ​ | ​ | 6.49% | ​ | ​ |
| ​                                                                                       | ​ | ​ | ​                       | ​ | ​ | ​              | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | ​ | ​                            | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 22,721,398 | ​ | ​ | ​ | ​ | ​ | 22,900,000 | ​ | ​ | ​ | ​ | ​ | 15.70% | ​ | ​ |
| Champion ONE(2),(3)                                                                           | ​ | ​ | Technology & Telecom      | ​ | ​ | LIBOR + 10.5%        | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 12.90%  | ​                            | ​ | ​ | ​ | ​ | 3/17/2022  | ​    | ​ | ​ | ​         | ​ | 5,884,230 | ​ | ​ | ​ | ​ | ​ | 5,842,683 | ​ | ​ | ​ | ​ | ​ | 5,884,230 | ​ | ​ | ​ | ​ | ​ | 4.04% | ​ | ​ |
| Clanwilliam Group Ltd.(2),(3),(8)                                                             | ​ | ​ | Technology & Telecom      | ​ | ​ | Euribor + 7.00%      | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 7.00%   | ​                            | ​ | ​ | ​ | ​ | 11/8/2025  | ​    | ​ | ​ | ​         | €  | 5,724,000 | ​ | ​ | ​ | ​ | ​ | 6,344,310 | ​ | ​ | ​ | ​ | ​ | 6,347,088 | ​ | ​ | ​ | ​ | ​ | 4.35% | ​ | ​ |
| Envocore Holding, LLC(2),(3),(7)                                                              | ​ | ​ | Industrial Services           | ​ | ​ | LIBOR + 9.25%        | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 11.65%  | ​                            | ​ | ​ | ​ | ​ | 6/30/2022  | ​    | ​ | ​ | ​         | ​ | 18,500,000 | ​ | ​ | ​ | ​ | ​ | 18,453,344 | ​ | ​ | ​ | ​ | ​ | 18,500,000 | ​ | ​ | ​ | ​ | ​ | 12.69% | ​ | ​ |
| Epic Healthcare Staffing Intermediate Holdco, LLC(2),(3),(8),(9)                              | ​ | ​ | Business Services             | ​ | ​ | LIBOR + 8.25%        | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 10.65%  | ​                            | ​ | ​ | ​ | ​ | 10/19/2022 | ​    | ​ | ​ | ​         | ​ | 13,430,114 | ​ | ​ | ​ | ​ | ​ | 13,392,406 | ​ | ​ | ​ | ​ | ​ | 13,430,114 | ​ | ​ | ​ | ​ | ​ | 9.21% | ​ | ​ |
| Healthcare Associates of Texas, LLC(2),(3),(8)                                                | ​ | ​ | Healthcare Services           | ​ | ​ | LIBOR + 8.0%         | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 10.40%  | ​                            | ​ | ​ | ​ | ​ | 11/8/2022  | ​    | ​ | ​ | ​         | ​ | 20,578,816 | ​ | ​ | ​ | ​ | ​ | 20,578,816 | ​ | ​ | ​ | ​ | ​ | 20,578,816 | ​ | ​ | ​ | ​ | ​ | 14.11% | ​ | ​ |
| Impact Group, LLC(2),(3)                                                                      | ​ | ​ | Consumer Services             | ​ | ​ | LIBOR + 6.50%        | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 9.21%   | ​                            | ​ | ​ | ​ | ​ | 6/27/2023  | ​    | ​ | ​ | ​         | ​ | 19,965,214 | ​ | ​ | ​ | ​ | ​ | 19,965,214 | ​ | ​ | ​ | ​ | ​ | 19,965,214 | ​ | ​ | ​ | ​ | ​ | 13.69% | ​ | ​ |
| Lugano Diamonds & Jewelry, Inc.(2),(3)                                                    | ​ | ​ | Retail                        | ​ | ​ | LIBOR + 10.00%       | ​ | ​ | ​         | ​ | 0.75%   | ​       | ​ | ​ | ​       | ​ | 12.40%  | ​                            | ​ | ​ | ​ | ​ | 10/24/2021 | ​    | ​ | ​ | ​         | ​ | 6,750,000 | ​ | ​ | ​ | ​ | ​ | 6,229,503 | ​ | ​ | ​ | ​ | ​ | 6,365,358 | ​ | ​ | ​ | ​ | ​ | 4.37% | ​ | ​ |
| Manna Pro Products, LLC(2),(3),(8)                                                            | ​ | ​ | Consumer Services             | ​ | ​ | LIBOR + 6.0%         | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 8.31%   | ​                            | ​ | ​ | ​ | ​ | 12/8/2023  | ​    | ​ | ​ | ​         | ​ | 1,322,485 | ​ | ​ | ​ | ​ | ​ | 1,316,153 | ​ | ​ | ​ | ​ | ​ | 1,322,485 | ​ | ​ | ​ | ​ | ​ | 0.91% | ​ | ​ |
| Palmetto Moon LLC(2)                                                                          | ​ | ​ | Retail                        | ​ | ​ | 11.5% Cash, 1.0% PIK | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 12.50%  | ​                            | ​ | ​ | ​ | ​ | 10/31/2021 | ​    | ​ | ​ | ​         | ​ | 4,737,622 | ​ | ​ | ​ | ​ | ​ | 4,720,936 | ​ | ​ | ​ | ​ | ​ | 4,648,350 | ​ | ​ | ​ | ​ | ​ | 3.19% | ​ | ​ |
| Pinstripe Holdings, LLC(2),(3)                                                                | ​ | ​ | Business Services             | ​ | ​ | LIBOR + 6.00%        | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 8.81%   | ​                            | ​ | ​ | ​ | ​ | 1/17/2025  | ​    | ​ | ​ | ​         | ​ | 10,000,000 | ​ | ​ | ​ | ​ | ​ | 9,800,000 | ​ | ​ | ​ | ​ | ​ | 9,800,000 | ​ | ​ | ​ | ​ | ​ | 6.72% | ​ | ​ |
| Superior Controls, Inc.(2),(3),(8)                                                            | ​ | ​ | Wholesale/​Distribution | ​ | ​ | LIBOR + 7.25%        | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 9.65%   | ​                            | ​ | ​ | ​ | ​ | 3/22/2021  | ​    | ​ | ​ | ​         | ​ | 9,825,000 | ​ | ​ | ​ | ​ | ​ | 9,789,394 | ​ | ​ | ​ | ​ | ​ | 9,825,000 | ​ | ​ | ​ | ​ | ​ | 6.74% | ​ | ​ |
| Total Senior Secured – First Lien                                           | ​ | ​ | ​                       | ​ | ​ | ​              | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | ​ | ​                            | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 154,339,266 | ​ | ​ | ​ | ​ | ​ | 154,748,909 | ​ | ​ | ​ | ​ | ​ | 106.14% | ​ | ​ |
| Senior Secured – Second Lien — 29.18%                     | ​ |
| BayMark Health Services, Inc.(2),(3)                                                          | ​ | ​ | Healthcare Services           | ​ | ​ | LIBOR + 8.25%        | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 10.60%  | ​                            | ​ | ​ | ​ | ​ | 3/1/2025   | ​    | ​ | ​ | ​         | ​ | 7,000,000 | ​ | ​ | ​ | ​ | ​ | 6,938,172 | ​ | ​ | ​ | ​ | ​ | 7,000,000 | ​ | ​ | ​ | ​ | ​ | 4.80% | ​ | ​ |
| Medsurant Holdings, LLC(2)                                                                    | ​ | ​ | High Tech Industries          | ​ | ​ | 13.00% Cash          | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 13.00%  | ​                            | ​ | ​ | ​ | ​ | 6/30/2020  | ​    | ​ | ​ | ​         | ​ | 8,729,396 | ​ | ​ | ​ | ​ | ​ | 8,701,223 | ​ | ​ | ​ | ​ | ​ | 8,729,396 | ​ | ​ | ​ | ​ | ​ | 5.99% | ​ | ​ |
| Pharmalogic Holdings Corp.(2),(3),(8)                                                         | ​ | ​ | Healthcare Services           | ​ | ​ | LIBOR + 8.0%         | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 10.34%  | ​                            | ​ | ​ | ​ | ​ | 12/11/2023 | ​    | ​ | ​ | ​         | ​ | 11,340,000 | ​ | ​ | ​ | ​ | ​ | 11,267,485 | ​ | ​ | ​ | ​ | ​ | 11,340,000 | ​ | ​ | ​ | ​ | ​ | 7.77% | ​ | ​ |
| Sandvine Corporation(2),(3)                                                                   | ​ | ​ | Telecommunications            | ​ | ​ | LIBOR + 8.00%        | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 10.35%  | ​                            | ​ | ​ | ​ | ​ | 11/2/2026  | ​    | ​ | ​ | ​         | ​ | 4,500,000 | ​ | ​ | ​ | ​ | ​ | 4,410,000 | ​ | ​ | ​ | ​ | ​ | 4,410,000 | ​ | ​ | ​ | ​ | ​ | 3.02% | ​ | ​ |
| VVC Holding Corp.(2),(3),(5)                                                                  | ​ | ​ | Healthcare Services           | ​ | ​ | LIBOR + 8.13%        | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 10.56%  | ​                            | ​ | ​ | ​ | ​ | 7/9/2026   | ​    | ​ | ​ | ​         | ​ | 6,000,000 | ​ | ​ | ​ | ​ | ​ | 5,943,433 | ​ | ​ | ​ | ​ | ​ | 6,120,000 | ​ | ​ | ​ | ​ | ​ | 4.20% | ​ | ​ |
| WeddingWire, Inc.(2),(3)                                                                      | ​ | ​ | Consumer Services             | ​ | ​ | LIBOR + 8.25%        | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 11.06%  | ​                            | ​ | ​ | ​ | ​ | 12/21/2026 | ​    | ​ | ​ | ​         | ​ | 5,000,000 | ​ | ​ | ​ | ​ | ​ | 4,950,000 | ​ | ​ | ​ | ​ | ​ | 4,950,000 | ​ | ​ | ​ | ​ | ​ | 3.40% | ​ | ​ |
| Total Senior Secured – Second Lien                                          | ​ | ​ | ​                       | ​ | ​ | ​              | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | ​ | ​                            | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 42,210,313 | ​ | ​ | ​ | ​ | ​ | 42,549,396 | ​ | ​ | ​ | ​ | ​ | 29.18% | ​ | ​ |
| CLO/Structured Credit — 1.20%                                               | ​ |
| Goldentree Loan Management US CLO 2 Ltd.(3),(10)                                              | ​ | ​ | USD CLO                       | ​ | ​ | LIBOR + 4.70%        | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 7.06%   | ​                            | ​ | ​ | ​ | ​ | 11/28/2030 | ​    | ​ | ​ | ​         | ​ | 2,000,000 | ​ | ​ | ​ | ​ | $ | 1,948,058 | ​ | ​ | ​ | ​ | $ | 1,739,600 | ​ | ​ | ​ | ​ | ​ | 1.20% | ​ | ​ |
| Total CLO/Structured Credit                                                                   | ​ | ​ | ​                       | ​ | ​ | ​              | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | ​ | ​                            | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 1,948,058 | ​ | ​ | ​ | ​ | ​ | 1,739,600 | ​ | ​ | ​ | ​ | ​ | 1.20% | ​ | ​ |
| ​                                                                                       |

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TABLE OF CONTENTS

| Company(+)***                                                                            | ​ | ​ | Industry                                      | ​ | ​ | SpreadAboveIndex | ​ | ​ | Base RateFloor | ​ | ​ | InterestRate | ​ | ​ | MaturityDate | ​ | ​ | No. Shares/​PrincipalAmount | ​ | ​    | Cost(1) | ​ | ​ | Fair Value | ​ | ​    | % of NetAssets | ​ |
|------------------------------------------------------------------------------------------|---------|---------|-----------------------------------------------|---------|---------|------------------|---------|---------|----------------|---------|---------|--------------|---------|---------|--------------|---------|---------|-----------------------------------|---------|------------|---------|---------|---------|------------|---------|------------|----------------|---------|
| Equity/Other — 4.37%                                                   | ​ |
| Champion ONE, Common Shares(2),(4)                                                       | ​ | ​ | Technology & Telecom                      | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | 11,250     | ​        | ​ | ​ | ​ | $ | 1,125,000 | ​ | ​ | ​ | ​ | $ | 908,410 | ​ | ​ | ​ | ​ | ​ | 0.62% | ​ | ​ |
| Envocore Holding, LLC, Preferred Shares(2),(4),(6),(7)                                   | ​ | ​ | Industrial Services                           | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | 1,139,725  | ​        | ​ | ​ | ​ | ​ | 1,160,360 | ​ | ​ | ​ | ​ | ​ | 788,000 | ​ | ​ | ​ | ​ | ​ | 0.54% | ​ | ​ |
| IGT, Preferred Shares(2),(4)                                                             | ​ | ​ | Industrial Services                           | ​ | ​ | 11% PIK          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | 11.00%  | ​      | ​ | ​ | ​                           | ​ | 12/10/2024 | ​ | ​ | ​ | ​    | ​ | 1,110,922  | ​        | ​ | ​ | ​ | ​ | 1,110,922 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Common Shares(2),(4)                                                                     | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | 44,000     | ​        | ​ | ​ | ​ | ​ | 44,000 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Preferred AA Shares(2),(4)                                                               | ​ | ​ | ​                                       | ​ | ​ | 15% PIK          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | 15.00%  | ​      | ​ | ​ | ​                           | ​ | 12/10/2024 | ​ | ​ | ​ | ​    | ​ | 326,789    | ​        | ​ | ​ | ​ | ​ | 326,789 | ​ | ​ | ​ | ​ | ​ | 271,789 | ​ | ​ | ​ | ​ | ​ | 0.19% | ​ | ​ |
| ​                                                                                  | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 1,481,711 | ​ | ​ | ​ | ​ | ​ | 271,789 | ​ | ​ | ​ | ​ | ​ | 0.19% | ​ | ​ |
| Lugano Diamonds & Jewelry, Inc., Warrants(2),(4)                                     | ​ | ​ | Retail                                        | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | 666,615    | ​        | ​ | ​ | ​ | ​ | 666,615 | ​ | ​ | ​ | ​ | ​ | 1,000,000 | ​ | ​ | ​ | ​ | ​ | 0.69% | ​ | ​ |
| Metal Powder Products, LLC, Common Shares(2),(4)                                         | ​ | ​ | Industrial Manufacturing                      | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | 500,000    | ​        | ​ | ​ | ​ | ​ | 500,000 | ​ | ​ | ​ | ​ | ​ | 666,047 | ​ | ​ | ​ | ​ | ​ | 0.46% | ​ | ​ |
| My Alarm Center, LLC, Common Shares(2),(4)                                               | ​ | ​ | Security                                      | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | 129,582    | ​        | ​ | ​ | ​ | ​ | 256,793 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Junior Preferred Shares(2),(4)                                                           | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | 2,420      | ​        | ​ | ​ | ​ | ​ | 2,366,549 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Senior Preferred Shares(2),(4)                                                           | ​ | ​ | ​                                       | ​ | ​ | 8% PIK           | ​ | ​ | ​        | ​ | ​ | ​      | ​ | 8.00%   | ​      | ​ | ​ | ​                           | ​ | 7/14/2022  | ​ | ​ | ​ | ​    | ​ | 2,998      | ​        | ​ | ​ | ​ | ​ | 2,862,059 | ​ | ​ | ​ | ​ | ​ | 1,023,999 | ​ | ​ | ​ | ​ | ​ | 0.70% | ​ | ​ |
| ​                                                                                  | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 5,485,401 | ​ | ​ | ​ | ​ | ​ | 1,023,999 | ​ | ​ | ​ | ​ | ​ | 0.70% | ​ | ​ |
| Palmetto Moon LLC, Common Shares(2),(4)                                                  | ​ | ​ | Retail                                        | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | 61         | ​        | ​ | ​ | ​ | ​ | 434,145 | ​ | ​ | ​ | ​ | ​ | 106,000 | ​ | ​ | ​ | ​ | ​ | 0.07% | ​ | ​ |
| Superior Controls, Inc., Preferred Shares(2),(4)                                         | ​ | ​ | Wholesale/​Distribution                 | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | 400,000    | ​        | ​ | ​ | ​ | ​ | 400,000 | ​ | ​ | ​ | ​ | ​ | 789,192 | ​ | ​ | ​ | ​ | ​ | 0.54% | ​ | ​ |
| Tunnel Hill, Class B Common Units(2),(4),(11),(14)                                       | ​ | ​ | Waste Services                                | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | 98,418     | ​        | ​ | ​ | ​ | ​ | 2,529,303 | ​ | ​ | ​ | ​ | ​ | 820,437 | ​ | ​ | ​ | ​ | ​ | 0.56% | ​ | ​ |
| Total Equity/Other                                                                       | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 13,782,535 | ​ | ​ | ​ | ​ | ​ | 6,373,874 | ​ | ​ | ​ | ​ | ​ | 4.37% | ​ | ​ |
| Total Investments in Non-Controlled, Non-Affiliated Portfolio Companies                  | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 212,280,172 | ​ | ​ | ​ | ​ | ​ | 205,411,779 | ​ | ​ | ​ | ​ | ​ | 140.89% | ​ | ​ |
| Investments in Non-Controlled, Affiliated Portfolio Companies — 8.90%* | ​ |
| Senior Subordinated — 0.83%                                            | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Battery Solutions, Inc.(2)                                                               | ​ | ​ | Environmental/​Recycling Services       | ​ | ​ | 12% Cash, 2% PIK | ​ | ​ | ​        | ​ | ​ | ​      | ​ | 14.00%  | ​      | ​ | ​ | ​                           | ​ | 11/6/2021  | ​ | ​ | ​ | ​    | ​ | 1,212,773  | ​        | ​ | ​ | ​ | $ | 1,212,773 | ​ | ​ | ​ | ​ | $ | 1,212,774 | ​ | ​ | ​ | ​ | ​ | 0.83% | ​ | ​ |
| Southern Technical Institute, Inc.(2),(4)                                                | ​ | ​ | Education                                     | ​ | ​ | 6% PIK           | ​ | ​ | ​        | ​ | ​ | ​      | ​ | 6.00%   | ​      | ​ | ​ | ​                           | ​ | 12/31/2021 | ​ | ​ | ​ | ​    | ​ | 3,528,988  | ​        | ​ | ​ | ​ | ​ | 3,528,988 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Total Senior Subordinated                                                                | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 4,741,761 | ​ | ​ | ​ | ​ | ​ | 1,212,774 | ​ | ​ | ​ | ​ | ​ | 0.83% | ​ | ​ |
| Equity/Other — 8.07%                                                   | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Battery Solutions, Inc., Class A Units(2),(4),(12)                                       | ​ | ​ | Environmental/​Recycling Services       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | 5,000,000  | ​        | ​ | ​ | ​ | $ | 1,058,000 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Class E Units(2)                                                                         | ​ | ​ | ​                                       | ​ | ​ | 8% PIK           | ​ | ​ | ​        | ​ | ​ | ​      | ​ | 8.00%   | ​      | ​ | ​ | ​                           | ​ | 11/6/2021  | ​ | ​ | ​ | ​    | ​ | 4,487,017  | ​        | ​ | ​ | ​ | ​ | 4,487,017 | ​ | ​ | ​ | ​ | ​ | 4,487,017 | ​ | ​ | ​ | ​ | ​ | 3.08% | ​ | ​ |
| Class F Units(2),(4)                                                                     | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | 3,333,333  | ​        | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| ​                                                                                  | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 5,545,017 | ​ | ​ | ​ | ​ | ​ | 4,487,017 | ​ | ​ | ​ | ​ | ​ | 3.08% | ​ | ​ |
| Conisus, LLC, Common Shares(2),(4)                                                       | ​ | ​ | Media: Advertising, Printing & Publishing | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | 4,914,556  | ​        | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Preferred Equity(2)                                                                      | ​ | ​ | ​                                       | ​ | ​ | 12% PIK          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | 12.00%  | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | 12,677,834 | ​        | ​ | ​ | ​ | ​ | 12,677,834 | ​ | ​ | ​ | ​ | ​ | 6,554,225 | ​ | ​ | ​ | ​ | ​ | 4.49% | ​ | ​ |
| ​                                                                                  | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 12,677,834 | ​ | ​ | ​ | ​ | ​ | 6,554,225 | ​ | ​ | ​ | ​ | ​ | 4.49% | ​ | ​ |
| Southern Technical Institute, Inc., Class A Units(2),(4)                                 | ​ | ​ | Education                                     | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | 3,164,063  | ​        | ​ | ​ | ​ | ​ | 2,167,000 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Class A1 Units(2),(4),(13)                                                               | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | 6,000,000  | ​        | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| ​                                                                                  | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 2,167,000 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Xpress Global Systems, LLC, Class B Units(2),(4)                                    | ​ | ​ | Transportation Logistics                      | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | 12,544     | ​        | ​ | ​ | ​ | ​ | 1,254,000 | ​ | ​ | ​ | ​ | ​ | 726,000 | ​ | ​ | ​ | ​ | ​ | 0.50% | ​ | ​ |
| Total Equity/Other                                                                       | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 21,643,851 | ​ | ​ | ​ | ​ | ​ | 11,767,242 | ​ | ​ | ​ | ​ | ​ | 8.07% | ​ | ​ |
| Total Investments in Non-Controlled, Affiliated Portfolio Companies                      | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​    | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 26,385,612 | ​ | ​ | ​ | ​ | ​ | 12,980,016 | ​ | ​ | ​ | ​ | ​ | 8.90% | ​ | ​ |
| ​                                                                                  |

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TABLE OF CONTENTS

| Company(+)***                                                                          | ​ | ​ | Industry                 | ​ | ​ | SpreadAboveIndex | ​ | ​ | Base RateFloor | ​ | ​ | InterestRate | ​ | ​ | MaturityDate | ​ | ​ | No. Shares/​PrincipalAmount | ​ | ​   | Cost(1) | ​ | ​ | Fair Value | ​ | ​    | % of NetAssets | ​ |
|----------------------------------------------------------------------------------------|---------|---------|--------------------------|---------|---------|------------------|---------|---------|----------------|---------|---------|--------------|---------|---------|--------------|---------|---------|-----------------------------------|---------|-----------|---------|---------|---------|------------|---------|------------|----------------|---------|
| Investments in Controlled, Affiliated Portfolio Companies — 11.25%** | ​ |
| Senior Secured – First Lien — 9.19%                | ​ | ​ | ​                  | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| FST Technical Services, LLC(2)                                                         | ​ | ​ | Technology & Telecom | ​ | ​ | 14% Cash         | ​ | ​ | ​        | ​ | ​ | ​      | ​ | 14.00%  | ​      | ​ | ​ | ​                           | ​ | 6/30/2019 | ​ | ​ | ​ | ​    | ​ | 13,406,020 | ​        | ​ | ​ | ​ | $ | 13,406,020 | ​ | ​ | ​ | ​ | $ | 13,406,020 | ​ | ​ | ​ | ​ | ​ | 9.19% | ​ | ​ |
| Total Senior Secured – First Lien                                    | ​ | ​ | ​                  | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 13,406,020 | ​ | ​ | ​ | ​ | ​ | 13,406,020 | ​ | ​ | ​ | ​ | ​ | 9.19% | ​ | ​ |
| Equity/Other — 2.06%                                                 | ​ | ​ | ​                  | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| FST Technical Services, LLC, Class B Units(2),(4)                                 | ​ | ​ | Technology & Telecom | ​ | ​ | 9% PIK           | ​ | ​ | ​        | ​ | ​ | ​      | ​ | 9.00%   | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | 1,750,000  | ​        | ​ | ​ | ​ | $ | 1,806,542 | ​ | ​ | ​ | ​ | $ | 3,000,001 | ​ | ​ | ​ | ​ | ​ | 2.06% | ​ | ​ |
| Total Equity/Other                                                                     | ​ | ​ | ​                  | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 1,806,542 | ​ | ​ | ​ | ​ | ​ | 3,000,001 | ​ | ​ | ​ | ​ | ​ | 2.06% | ​ | ​ |
| Total Investments in Controlled, Affiliated Portfolio Companies                        | ​ | ​ | ​                  | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 15,212,562 | ​ | ​ | ​ | ​ | ​ | 16,406,021 | ​ | ​ | ​ | ​ | ​ | 11.25% | ​ | ​ |
| Total Investments                                                                      | ​ | ​ | ​                  | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 253,878,346 | ​ | ​ | ​ | ​ | ​ | 234,797,816 | ​ | ​ | ​ | ​ | ​ | 161.04% | ​ | ​ |
| Liabilities In Excess Of Other Assets                                                  | ​ | ​ | ​                  | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | (88,802,284) | ​ | ​ | ​ | ​ | ​ | (61.04)% | ​ | ​ |
| Net Assets                                                                             | ​ | ​ | ​                  | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | $ | 145,802,532 | ​ | ​ | ​ | ​ | ​ | 100.00% | ​ | ​ |
| ​                                                                                |
| Name of Issuers                    | ​ | ​ | Fair Value at December 31, 2017 | ​ | ​    | Gross Additions/​ (Gross Reductions) | ​ | ​ | Transfers In/Out | ​ | ​   | Change in Unrealized Appreciation (Depreciation) | ​ | ​ | Realized Gain (Loss) | ​ | ​ | Fair Value at December 31 2018 | ​ | ​ | Interest/​ Dividend/​ Other Income | ​ |
|------------------------------------|---------|---------|---------------------------------|---------|------------|--------------------------------------------|---------|---------|------------------|---------|-----------|--------------------------------------------------|---------|---------|----------------------|---------|---------|--------------------------------|---------|---------|------------------------------------------------|---------|
| Battery Solutions, Inc.            | ​ | ​ | ​                         | $       | 7,820,167  | ​                                    | ​ | ​ | ​          | $       | (843,377) | ​                                          | ​ | ​ | ​              | $       | — | ​                        | ​ | ​ | ​                                        | $       | (1,276,999) | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | $ | 5,699,791 | ​ | ​ | ​ | ​ | $ | 550,223 | ​ | ​ |
| Conisus, LLC                       | ​ | ​ | ​                         | ​ | 6,678,442  | ​                                    | ​ | ​ | ​          | ​ | —   | ​                                          | ​ | ​ | ​              | ​ | — | ​                        | ​ | ​ | ​                                        | ​ | (124,217) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 6,554,225 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Show Media, Inc.                   | ​ | ​ | ​                         | ​ | 1          | ​                                    | ​ | ​ | ​          | ​ | ​   | ​                                          | ​ | ​ | ​              | ​ | ​ | ​                        | ​ | ​ | ​                                        | ​ | 7,900,820 | ​ | ​ | ​ | ​ | ​ | (7,900,821) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Southern Technical Institute, Inc. | ​ | ​ | ​                         | ​ | 1          | ​                                    | ​ | ​ | ​          | ​ | —   | ​                                          | ​ | ​ | ​              | ​ | — | ​                        | ​ | ​ | ​                                        | ​ | 10,167,528 | ​ | ​ | ​ | ​ | ​ | (10,167,529) | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Xpress Global Systems, LLC         | ​ | ​ | ​                         | ​ | 5,474,294  | ​                                    | ​ | ​ | ​          | ​ | 38,166    | ​                                          | ​ | ​ | ​              | ​ | — | ​                        | ​ | ​ | ​                                        | ​ | 1,689,002 | ​ | ​ | ​ | ​ | ​ | (6,475,462) | ​ | ​ | ​ | ​ | ​ | 726,000 | ​ | ​ | ​ | ​ | ​ | 162,603 | ​ | ​ |
| ​                            | ​ | ​ | ​                         | $       | 19,972,905 | ​                                    | ​ | ​ | ​          | $       | (805,211) | ​                                          | ​ | ​ | ​              | $       | — | ​                        | ​ | ​ | ​                                        | $       | 18,356,134 | ​ | ​ | ​ | ​ | $ | (24,543,812) | ​ | ​ | ​ | ​ | $ | 12,980,016 | ​ | ​ | ​ | ​ | $ | 712,826 | ​ | ​ |
| ​                            |
| Name of Issuers             | ​ | ​ | Fair value at December 31, 2017 | ​ | ​    | Gross Additions/​ (Gross Reductions) | ​ | ​ | Transfers In/Out | ​ | ​   | Change in Unrealized Appreciation (Depreciation) | ​ | ​ | Realized Gain (Loss) | ​ | ​ | Fair Value at December 31 2018 | ​ | ​ | Interest/​ Dividend/​ Other Income | ​ |
|-----------------------------|---------|---------|---------------------------------|---------|------------|--------------------------------------------|---------|---------|------------------|---------|-----------|--------------------------------------------------|---------|---------|----------------------|---------|---------|--------------------------------|---------|---------|------------------------------------------------|---------|
| FST Technical Services, LLC | ​ | ​ | ​                         | $       | 15,256,237 | ​                                    | ​ | ​ | ​          | $       | (593,739) | ​                                          | ​ | ​ | ​              | $       | — | ​                        | ​ | ​ | ​                                        | $       | 1,743,523 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | $ | 16,406,021 | ​ | ​ | ​ | ​ | $ | 1,940,389 | ​ | ​ |
| ​                     | ​ | ​ | ​                         | $       | 15,256,237 | ​                                    | ​ | ​ | ​          | $       | (593,739) | ​                                          | ​ | ​ | ​              | $       | — | ​                        | ​ | ​ | ​                                        | $       | 1,743,523 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | $ | 16,406,021 | ​ | ​ | ​ | ​ | $ | 1,940,389 | ​ | ​ |
| ​                     |

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TABLE OF CONTENTS

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TABLE OF CONTENTS

| Company(+)(^)***                                                                  | ​ | ​ | Industry                      | ​ | ​ | Spread Above Index        | ​ | ​ | Base Rate Floor | ​ | ​ | Interest Rate | ​ | ​ | Maturity Date | ​ | ​ | No. Shares/​ Principal Amount | ​ | ​ | Cost(1) | ​ | ​    | Fair Value | ​ | ​ | % of Net Assets | ​ |
|-----------------------------------------------------------------------------------|---------|---------|-------------------------------|---------|---------|---------------------------|---------|---------|-----------------|---------|---------|---------------|---------|---------|---------------|---------|---------|-------------------------------------|---------|---------|---------|---------|------------|------------|---------|---------|-----------------|---------|
| Investments in Non-Controlled, Non-Affiliated Portfolio Companies — 159.99% | ​ |
| Senior Secured – First Lien — 103.57%                     | ​ |
| Black Diamond Rentals                                                             | ​ | ​ | Oil & Gas Services        | ​ | ​ | 12% Cash, 2% PIK(2)       | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 14.00%  | ​                             | ​ | ​ | ​ | ​ | 7/9/2018   | ​    | ​ | ​ | ​         | ​ | 5,937,501 | ​ | ​ | ​ | ​ | $ | 5,937,501 | ​ | ​ | ​ | ​ | $ | 4,875,828 | ​ | ​ | ​ | ​ | ​ | 3.09% | ​ | ​ |
| ​                                                                           | ​ | ​ | ​                       | ​ | ​ | 4% Cash, 10% PIK          | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 14.00%  | ​                             | ​ | ​ | ​ | ​ | 7/9/2018   | ​    | ​ | ​ | ​         | ​ | 2,288,381 | ​ | ​ | ​ | ​ | ​ | 2,246,806 | ​ | ​ | ​ | ​ | ​ | 2,288,400 | ​ | ​ | ​ | ​ | ​ | 1.45% | ​ | ​ |
| ​                                                                           | ​ | ​ | ​                       | ​ | ​ | ​                   | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | ​ | ​                             | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 8,184,307 | ​ | ​ | ​ | ​ | ​ | 7,164,228 | ​ | ​ | ​ | ​ | ​ | 4.54% | ​ | ​ |
| CGGR Operations Holdings Corporation(3)                                           | ​ | ​ | Business Services             | ​ | ​ | 11.5%                     | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 12.50%  | ​                             | ​ | ​ | ​ | ​ | 10/2/2023  | ​    | ​ | ​ | ​         | ​ | 13,431,579 | ​ | ​ | ​ | ​ | ​ | 13,302,663 | ​ | ​ | ​ | ​ | ​ | 13,431,578 | ​ | ​ | ​ | ​ | ​ | 8.52% | ​ | ​ |
| ​                                                                           | ​ | ​ | ​                       | ​ | ​ | 7.0%                      | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 8.00%   | ​                             | ​ | ​ | ​ | ​ | 9/30/2022  | ​    | ​ | ​ | ​         | ​ | 9,768,421 | ​ | ​ | ​ | ​ | ​ | 9,675,645 | ​ | ​ | ​ | ​ | ​ | 9,768,421 | ​ | ​ | ​ | ​ | ​ | 6.19% | ​ | ​ |
| ​                                                                           | ​ | ​ | ​                       | ​ | ​ | ​                   | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | ​ | ​                             | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 22,978,308 | ​ | ​ | ​ | ​ | ​ | 23,199,999 | ​ | ​ | ​ | ​ | ​ | 14.71% | ​ | ​ |
| Champion ONE(3)                                                                   | ​ | ​ | Technology & Telecom      | ​ | ​ | LIBOR + 10.5%             | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 11.83%  | ​                             | ​ | ​ | ​ | ​ | 3/17/2022  | ​    | ​ | ​ | ​         | ​ | 7,078,125 | ​ | ​ | ​ | ​ | ​ | 7,020,027 | ​ | ​ | ​ | ​ | ​ | 7,078,125 | ​ | ​ | ​ | ​ | ​ | 4.49% | ​ | ​ |
| Cirrus Medical Staffing, Inc.(3),(4)                                              | ​ | ​ | Business Services             | ​ | ​ | LIBOR + 8.25%             | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 9.61%   | ​                             | ​ | ​ | ​ | ​ | 10/19/2022 | ​    | ​ | ​ | ​         | ​ | 18,600,000 | ​ | ​ | ​ | ​ | ​ | 18,510,539 | ​ | ​ | ​ | ​ | ​ | 18,600,000 | ​ | ​ | ​ | ​ | ​ | 11.79% | ​ | ​ |
| Healthcare Associates of Texas, LLC(3),(4)                                        | ​ | ​ | Healthcare Services           | ​ | ​ | LIBOR + 8.0%              | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 9.39%   | ​                             | ​ | ​ | ​ | ​ | 11/8/2022  | ​    | ​ | ​ | ​         | ​ | 23,334,250 | ​ | ​ | ​ | ​ | ​ | 23,334,250 | ​ | ​ | ​ | ​ | ​ | 23,334,250 | ​ | ​ | ​ | ​ | ​ | 14.80% | ​ | ​ |
| IGT(3),(4)                                                                        | ​ | ​ | Industrial Services           | ​ | ​ | LIBOR + 8.50%             | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 9.86%   | ​                             | ​ | ​ | ​ | ​ | 12/10/2019 | ​    | ​ | ​ | ​         | ​ | 7,783,012 | ​ | ​ | ​ | ​ | ​ | 7,743,557 | ​ | ​ | ​ | ​ | ​ | 7,783,012 | ​ | ​ | ​ | ​ | ​ | 4.94% | ​ | ​ |
| Integrated Efficiency Solutions, Inc.(3),(5)                                      | ​ | ​ | Industrial Services           | ​ | ​ | LIBOR + 9.25%             | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 10.59%  | ​                             | ​ | ​ | ​ | ​ | 6/30/2022  | ​    | ​ | ​ | ​         | ​ | 19,500,000 | ​ | ​ | ​ | ​ | ​ | 19,436,803 | ​ | ​ | ​ | ​ | ​ | 19,500,000 | ​ | ​ | ​ | ​ | ​ | 12.36% | ​ | ​ |
| Lugano Diamonds & Jewelry, Inc.(3)                                            | ​ | ​ | Retail                        | ​ | ​ | LIBOR + 10.0%             | ​ | ​ | ​         | ​ | 0.75%   | ​       | ​ | ​ | ​       | ​ | 11.34%  | ​                             | ​ | ​ | ​ | ​ | 10/24/2021 | ​    | ​ | ​ | ​         | ​ | 8,000,000 | ​ | ​ | ​ | ​ | ​ | 7,349,002 | ​ | ​ | ​ | ​ | ​ | 7,483,890 | ​ | ​ | ​ | ​ | ​ | 4.75% | ​ | ​ |
| NTI Holdings, LLC(3),(4)                                                          | ​ | ​ | Telecommunications            | ​ | ​ | LIBOR + 8.0%              | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 9.57%   | ​                             | ​ | ​ | ​ | ​ | 3/30/2021  | ​    | ​ | ​ | ​         | ​ | 15,097,584 | ​ | ​ | ​ | ​ | ​ | 14,869,193 | ​ | ​ | ​ | ​ | ​ | 14,961,923 | ​ | ​ | ​ | ​ | ​ | 9.49% | ​ | ​ |
| Palmetto Moon LLC                                                                 | ​ | ​ | Retail                        | ​ | ​ | 11.5% Cash, 1.0% PIK      | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 12.50%  | ​                             | ​ | ​ | ​ | ​ | 10/31/2021 | ​    | ​ | ​ | ​         | ​ | 5,378,909 | ​ | ​ | ​ | ​ | ​ | 5,357,837 | ​ | ​ | ​ | ​ | ​ | 5,378,909 | ​ | ​ | ​ | ​ | ​ | 3.41% | ​ | ​ |
| Pharmalogics Recruiting, LLC(4)                                                   | ​ | ​ | Business Services             | ​ | ​ | 10.25% Cash               | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 10.25%  | ​                             | ​ | ​ | ​ | ​ | 1/31/2022  | ​    | ​ | ​ | ​         | ​ | 9,925,000 | ​ | ​ | ​ | ​ | ​ | 9,845,384 | ​ | ​ | ​ | ​ | ​ | 9,925,000 | ​ | ​ | ​ | ​ | ​ | 6.29% | ​ | ​ |
| Stancor, Inc.(3)                                                                  | ​ | ​ | Wholesale/​Distribution | ​ | ​ | LIBOR + 8.00%             | ​ | ​ | ​         | ​ | 0.75%   | ​       | ​ | ​ | ​       | ​ | 9.37%   | ​                             | ​ | ​ | ​ | ​ | 8/19/2019  | ​    | ​ | ​ | ​         | ​ | 4,105,932 | ​ | ​ | ​ | ​ | ​ | 4,105,932 | ​ | ​ | ​ | ​ | ​ | 4,105,932 | ​ | ​ | ​ | ​ | ​ | 2.60% | ​ | ​ |
| Superior Controls, Inc.(3),(4)                                                    | ​ | ​ | Wholesale/​Distribution | ​ | ​ | LIBOR + 8.75%             | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 10.09%  | ​                             | ​ | ​ | ​ | ​ | 3/22/2021  | ​    | ​ | ​ | ​         | ​ | 14,825,000 | ​ | ​ | ​ | ​ | ​ | 14,775,976 | ​ | ​ | ​ | ​ | ​ | 14,825,000 | ​ | ​ | ​ | ​ | ​ | 9.40% | ​ | ​ |
| Total Senior Secured – First Lien                               | ​ | ​ | ​                       | ​ | ​ | ​                   | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | ​ | ​                             | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 163,511,115 | ​ | ​ | ​ | ​ | ​ | 163,340,268 | ​ | ​ | ​ | ​ | ​ | 103.57% | ​ | ​ |
| Senior Secured – Second Lien — 5.54%                      | ​ |
| Medsurant Holdings, LLC                                                           | ​ | ​ | High Tech Industries          | ​ | ​ | 13.00% Cash               | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 13.00%  | ​                             | ​ | ​ | ​ | ​ | 6/30/2020  | ​    | ​ | ​ | ​         | ​ | 8,729,396 | ​ | ​ | ​ | ​ | $ | 8,677,481 | ​ | ​ | ​ | ​ | $ | 8,729,396 | ​ | ​ | ​ | ​ | ​ | 5.54% | ​ | ​ |
| Total Senior Secured – Second Lien                              | ​ | ​ | ​                       | ​ | ​ | ​                   | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | ​ | ​                             | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 8,677,481 | ​ | ​ | ​ | ​ | ​ | 8,729,396 | ​ | ​ | ​ | ​ | ​ | 5.54% | ​ | ​ |
| Senior Subordinated — 40.88%                                                | ​ |
| Black Diamond Rentals(2)                                                          | ​ | ​ | Oil & Gas Services        | ​ | ​ | 4% Cash                   | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 4.00%   | ​                             | ​ | ​ | ​ | ​ | 7/9/2018   | ​    | ​ | ​ | ​         | ​ | 8,009,188 | ​ | ​ | ​ | ​ | $ | 8,009,188 | ​ | ​ | ​ | ​ | $ | 4,004,594 | ​ | ​ | ​ | ​ | ​ | 2.54% | ​ | ​ |
| GST Autoleather(2),(6)                                                            | ​ | ​ | Automotive Business Services  | ​ | ​ | 11% Cash, 2.0% PIK        | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 13.00%  | ​                             | ​ | ​ | ​ | ​ | 1/11/2021  | ​    | ​ | ​ | ​         | ​ | 8,496,238 | ​ | ​ | ​ | ​ | ​ | 8,496,239 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Media Storm, LLC(2)                                                               | ​ | ​ | Media & Entertainment     | ​ | ​ | 10% PIK                   | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 10.00%  | ​                             | ​ | ​ | ​ | ​ | 8/28/2019  | ​    | ​ | ​ | ​         | ​ | 2,454,545 | ​ | ​ | ​ | ​ | $ | 2,454,545 | ​ | ​ | ​ | ​ | $ | 1 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Metal Powder Products LLC(3)                                                      | ​ | ​ | Industrial Manufacturing      | ​ | ​ | LIBOR + 11.25%, 1.0% PIK  | ​ | ​ | ​         | ​ | 0.75%   | ​       | ​ | ​ | ​       | ​ | 13.59%  | ​                             | ​ | ​ | ​ | ​ | 11/5/2021  | ​    | ​ | ​ | ​         | ​ | 8,333,733 | ​ | ​ | ​ | ​ | ​ | 8,333,734 | ​ | ​ | ​ | ​ | ​ | 8,500,408 | ​ | ​ | ​ | ​ | ​ | 5.39% | ​ | ​ |
| NextCare Holdings, Inc.                                                           | ​ | ​ | Healthcare Services           | ​ | ​ | 10% Cash, 4% PIK          | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 14.00%  | ​                             | ​ | ​ | ​ | ​ | 12/31/2018 | ​    | ​ | ​ | ​         | ​ | 15,833,365 | ​ | ​ | ​ | ​ | ​ | 15,731,616 | ​ | ​ | ​ | ​ | ​ | 15,833,365 | ​ | ​ | ​ | ​ | ​ | 10.04% | ​ | ​ |
| Pharmalogic Holdings Corp.                                                        | ​ | ​ | Healthcare Services           | ​ | ​ | 12% Cash                  | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 12.00%  | ​                             | ​ | ​ | ​ | ​ | 9/1/2021   | ​    | ​ | ​ | ​         | ​ | 16,122,103 | ​ | ​ | ​ | ​ | ​ | 16,093,930 | ​ | ​ | ​ | ​ | ​ | 16,122,103 | ​ | ​ | ​ | ​ | ​ | 10.22% | ​ | ​ |
| QRC Holdings, LLC                                                                 | ​ | ​ | High Tech Industries          | ​ | ​ | 12.25% Cash               | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | 12.25%  | ​                             | ​ | ​ | ​ | ​ | 11/19/2021 | ​    | ​ | ​ | ​         | ​ | 10,000,000 | ​ | ​ | ​ | ​ | ​ | 10,000,000 | ​ | ​ | ​ | ​ | ​ | 10,000,000 | ​ | ​ | ​ | ​ | ​ | 6.34% | ​ | ​ |
| Security Alarm Financing Enterprises L. P.(3),(7)                                 | ​ | ​ | Security                      | ​ | ​ | LIBOR + 13.00%, 0.34% PIK | ​ | ​ | ​         | ​ | 1.00%   | ​       | ​ | ​ | ​       | ​ | 14.34%  | ​                             | ​ | ​ | ​ | ​ | 6/19/2020  | ​    | ​ | ​ | ​         | ​ | 10,019,787 | ​ | ​ | ​ | ​ | ​ | 9,873,536 | ​ | ​ | ​ | ​ | ​ | 10,019,780 | ​ | ​ | ​ | ​ | ​ | 6.35% | ​ | ​ |
| Total Senior Subordinated                                                         | ​ | ​ | ​                       | ​ | ​ | ​                   | ​ | ​ | ​         | ​ | ​ | ​       | ​ | ​ | ​       | ​ | ​ | ​                             | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​         | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 78,992,788 | ​ | ​ | ​ | ​ | ​ | 64,480,251 | ​ | ​ | ​ | ​ | ​ | 40.88% | ​ | ​ |
| ​                                                                           |

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TABLE OF CONTENTS

| Company(+)(^)***                                                              | ​ | ​ | Industry                                | ​ | ​ | SpreadAboveIndex | ​ | ​ | Base RateFloor | ​ | ​ | InterestRate | ​ | ​ | MaturityDate | ​ | ​ | No. Shares/​PrincipalAmount | ​ | ​ | Cost(1) | ​ | ​    | Fair Value | ​ | ​ | % of NetAssets | ​ |
|-------------------------------------------------------------------------------|---------|---------|-----------------------------------------|---------|---------|------------------|---------|---------|----------------|---------|---------|--------------|---------|---------|--------------|---------|---------|-----------------------------------|---------|---------|---------|---------|------------|------------|---------|---------|----------------|---------|
| Equity/Other — 10.00%                                                   | ​ |
| Champion ONE, Common Shares(2)                                                | ​ | ​ | Technology & Telecom                | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | 11,250 | ​ | ​ | ​ | ​ | $ | 1,125,000 | ​ | ​ | ​ | ​ | $ | 984,332 | ​ | ​ | ​ | ​ | ​ | 0.62% | ​ | ​ |
| IGT, Preferred Shares(2)                                                      | ​ | ​ | Industrial Services                     | ​ | ​ | 11% PIK          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | 11.00%  | ​                           | ​ | ​ | ​ | ​ | 12/10/2019 | ​    | ​ | ​ | ​        | ​ | 1,110,922 | ​ | ​ | ​ | ​ | ​ | 1,110,923 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Common Shares(2)                                                              | ​ | ​ | ​                                 | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | 44,000 | ​ | ​ | ​ | ​ | ​ | 44,000 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Preferred AA Shares                                                           | ​ | ​ | ​                                 | ​ | ​ | 15% PIK          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | 15.00%  | ​                           | ​ | ​ | ​ | ​ | 12/10/2019 | ​    | ​ | ​ | ​        | ​ | 326,789 | ​ | ​ | ​ | ​ | ​ | 326,789 | ​ | ​ | ​ | ​ | ​ | 326,789 | ​ | ​ | ​ | ​ | ​ | 0.21% | ​ | ​ |
| ​                                                                       | ​ | ​ | ​                                 | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 1,481,712 | ​ | ​ | ​ | ​ | ​ | 326,789 | ​ | ​ | ​ | ​ | ​ | 0.21% | ​ | ​ |
| Integrated Efficiency Solutions, Inc. Preferred Shares(2),(5)                 | ​ | ​ | Industrial Services                     | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | 1,079,365 | ​ | ​ | ​ | ​ | ​ | 1,100,000 | ​ | ​ | ​ | ​ | ​ | 2,058,646 | ​ | ​ | ​ | ​ | ​ | 1.31% | ​ | ​ |
| Lugano Diamonds & Jewelry, Inc, Warrants(2)                               | ​ | ​ | Retail                                  | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | 666,615 | ​ | ​ | ​ | ​ | ​ | 666,615 | ​ | ​ | ​ | ​ | ​ | 1,000,000 | ​ | ​ | ​ | ​ | ​ | 0.63% | ​ | ​ |
| Metal Powder Products, LLC, Common Shares(2)                                  | ​ | ​ | Industrial Manufacturing                | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | 500,000 | ​ | ​ | ​ | ​ | ​ | 500,000 | ​ | ​ | ​ | ​ | ​ | 719,047 | ​ | ​ | ​ | ​ | ​ | 0.46% | ​ | ​ |
| My Alarm Center, LLC, Common Shares(2)                                        | ​ | ​ | Security                                | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | 129,582 | ​ | ​ | ​ | ​ | ​ | 256,793 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Junior Preferred Shares(2)                                                    | ​ | ​ | ​                                 | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | 2,420 | ​ | ​ | ​ | ​ | ​ | 2,366,549 | ​ | ​ | ​ | ​ | ​ | 1,253,570 | ​ | ​ | ​ | ​ | ​ | 0.79% | ​ | ​ |
| Senior Preferred Shares(2)                                                    | ​ | ​ | ​                                 | ​ | ​ | 8% PIK           | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | 8.00%   | ​                           | ​ | ​ | ​ | ​ | 7/14/2022  | ​    | ​ | ​ | ​        | ​ | 2,998,437 | ​ | ​ | ​ | ​ | ​ | 2,862,059 | ​ | ​ | ​ | ​ | ​ | 2,862,059 | ​ | ​ | ​ | ​ | ​ | 1.81% | ​ | ​ |
| ​                                                                       | ​ | ​ | ​                                 | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 5,485,401 | ​ | ​ | ​ | ​ | ​ | 4,115,629 | ​ | ​ | ​ | ​ | ​ | 2.60% | ​ | ​ |
| NTI Holdings, LLC, Preferred Shares(2)                                        | ​ | ​ | Telecommunications                      | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | 424,621 | ​ | ​ | ​ | ​ | ​ | 547,349 | ​ | ​ | ​ | ​ | ​ | 1,679,748 | ​ | ​ | ​ | ​ | ​ | 1.06% | ​ | ​ |
| Warrants(2)                                                                   | ​ | ​ | ​                                 | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | 417,823 | ​ | ​ | ​ | ​ | ​ | 224,689 | ​ | ​ | ​ | ​ | ​ | 1,035,867 | ​ | ​ | ​ | ​ | ​ | 0.66% | ​ | ​ |
| ​                                                                       | ​ | ​ | ​                                 | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 772,038 | ​ | ​ | ​ | ​ | ​ | 2,715,615 | ​ | ​ | ​ | ​ | ​ | 1.72% | ​ | ​ |
| Palmetto Moon LLC, Common Shares(2)                                           | ​ | ​ | Retail                                  | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | 434,145 | ​ | ​ | ​ | ​ | $ | 434,145 | ​ | ​ | ​ | ​ | $ | 329,633 | ​ | ​ | ​ | ​ | ​ | 0.21% | ​ | ​ |
| Superior Controls, Inc., Preferred Shares(2)                                  | ​ | ​ | Wholesale/​Distribution           | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | 400,000 | ​ | ​ | ​ | ​ | ​ | 400,000 | ​ | ​ | ​ | ​ | ​ | 754,000 | ​ | ​ | ​ | ​ | ​ | 0.48% | ​ | ​ |
| Tunnel Hill Class B Common Units(2),(8)                                  | ​ | ​ | Waste Services                          | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | 98,418 | ​ | ​ | ​ | ​ | ​ | 2,529,303 | ​ | ​ | ​ | ​ | ​ | 2,771,797 | ​ | ​ | ​ | ​ | ​ | 1.76% | ​ | ​ |
| Total Equity/Other                                                            | ​ | ​ | ​                                 | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 14,494,214 | ​ | ​ | ​ | ​ | ​ | 15,775,488 | ​ | ​ | ​ | ​ | ​ | 10.00% | ​ | ​ |
| Total Investments in Non-Controlled, Non-Affiliated Portfolio Companies  | ​ | ​ | ​                                 | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 265,675,598 | ​ | ​ | ​ | ​ | ​ | 252,325,403 | ​ | ​ | ​ | ​ | ​ | 159.99% | ​ | ​ |
| Investments in Non-Controlled, Affiliated Portfolio Companies — 12.67%* | ​ |
| Senior Secured – First Lien —                         | ​ | ​ | ​                                 | ​ | ​ | ​          | ​ | ​ | ​        | ​ |
| Show Media, Inc.(2)                                                           | ​ | ​ | Media & Entertainment               | ​ | ​ | 8% Cash, 3% PIK  | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | 11.00%  | ​                           | ​ | ​ | ​ | ​ | 12/31/2018 | ​    | ​ | ​ | ​        | ​ | 4,153,393 | ​ | ​ | ​ | ​ | $ | 4,153,393 | ​ | ​ | ​ | ​ | $ | 1 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Total Senior Secured – First Lien                                       | ​ | ​ | ​                                 | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 4,153,393 | ​ | ​ | ​ | ​ | ​ | 1 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Senior Secured – Second Lien — 3.47%                              | ​ |
| Southern Technical Institute, Inc.                                            | ​ | ​ | Education                               | ​ | ​ | 15% PIK          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | 15.00%  | ​                           | ​ | ​ | ​ | ​ | 12/2/2020  | ​    | ​ | ​ | ​        | ​ | 8,451,041 | ​ | ​ | ​ | ​ | $ | 8,451,041 | ​ | ​ | ​ | ​ | $ | 1 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Xpress Global Systems, LLC(3)                                                 | ​ | ​ | Transportation Logistics                | ​ | ​ | 15% PIK          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | 15.00%  | ​                           | ​ | ​ | ​ | ​ | 7/9/2020   | ​    | ​ | ​ | ​        | ​ | 5,455,263 | ​ | ​ | ​ | ​ | ​ | 5,222,687 | ​ | ​ | ​ | ​ | ​ | 3,509,422 | ​ | ​ | ​ | ​ | ​ | 2.22% | ​ | ​ |
| ​                                                                       | ​ | ​ | ​                                 | ​ | ​ | LIBOR + 11.0%    | ​ | ​ | ​        | ​ | 1.00%   | ​      | ​ | ​ | ​      | ​ | 12.33%  | ​                           | ​ | ​ | ​ | ​ | 7/9/2020   | ​    | ​ | ​ | ​        | ​ | 1,964,872 | ​ | ​ | ​ | ​ | ​ | 1,979,609 | ​ | ​ | ​ | ​ | ​ | 1,964,872 | ​ | ​ | ​ | ​ | ​ | 1.25% | ​ | ​ |
| ​                                                                       | ​ | ​ | ​                                 | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 7,202,296 | ​ | ​ | ​ | ​ | ​ | 5,474,294 | ​ | ​ | ​ | ​ | ​ | 3.47% | ​ | ​ |
| Total Senior Secured – Second Lien                          | ​ | ​ | ​                                 | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 15,653,337 | ​ | ​ | ​ | ​ | ​ | 5,474,295 | ​ | ​ | ​ | ​ | ​ | 3.47% | ​ | ​ |
| Senior Subordinated — 1.53%                                             | ​ |
| Battery Solutions, Inc.                                                       | ​ | ​ | Environmental/​Recycling Services | ​ | ​ | 6% Cash, 8% PIK  | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | 14.00%  | ​                           | ​ | ​ | ​ | ​ | 11/6/2021  | ​    | ​ | ​ | ​        | ​ | 2,404,598 | ​ | ​ | ​ | ​ | $ | 2,404,598 | ​ | ​ | ​ | ​ | $ | 2,404,598 | ​ | ​ | ​ | ​ | ​ | 1.53% | ​ | ​ |
| Total Senior Subordinated                                                     | ​ | ​ | ​                                 | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​ | ​ | ​ | ​    | ​    | ​ | ​ | ​        | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 2,404,598 | ​ | ​ | ​ | ​ | ​ | 2,404,598 | ​ | ​ | ​ | ​ | ​ | 1.53% | ​ | ​ |
| ​                                                                       |

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| Company(+)(^)***                                                          | ​ | ​ | Industry                                      | ​ | ​ | SpreadAboveIndex | ​ | ​ | Base RateFloor | ​ | ​ | InterestRate | ​ | ​ | MaturityDate | ​ | ​ | No. Shares/​PrincipalAmount | ​ | ​   | Cost(1) | ​ | ​ | Fair Value | ​ | ​    | % of NetAssets | ​ |
|---------------------------------------------------------------------------|---------|---------|-----------------------------------------------|---------|---------|------------------|---------|---------|----------------|---------|---------|--------------|---------|---------|--------------|---------|---------|-----------------------------------|---------|-----------|---------|---------|---------|------------|---------|------------|----------------|---------|
| Equity/Other — 7.67%                                                | ​ |
| Battery Solutions, Inc., Class A and F Units(2)                      | ​ | ​ | Environmental/​Recycling Services       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | 5,000,000  | ​        | ​ | ​ | ​ | $ | 1,058,000 | ​ | ​ | ​ | ​ | $ | 1,277,000 | ​ | ​ | ​ | ​ | ​ | 0.81% | ​ | ​ |
| Class E Units                                                        | ​ | ​ | ​                                       | ​ | ​ | 8% PIK           | ​ | ​ | ​        | ​ | ​ | ​      | ​ | 8.00%   | ​      | ​ | ​ | ​                           | ​ | 11/6/2021 | ​ | ​ | ​ | ​    | ​ | 4,138,569  | ​        | ​ | ​ | ​ | ​ | 4,138,569 | ​ | ​ | ​ | ​ | ​ | 4,138,569 | ​ | ​ | ​ | ​ | ​ | 2.62% | ​ | ​ |
| ​                                                                   | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 5,196,569 | ​ | ​ | ​ | ​ | ​ | 5,415,569 | ​ | ​ | ​ | ​ | ​ | 3.43% | ​ | ​ |
| Conisus, LLC, Common Shares(2)                                            | ​ | ​ | Media: Advertising, Printing & Publishing | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | 4,914,556  | ​        | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Preferred Equity                                                          | ​ | ​ | ​                                       | ​ | ​ | 12% PIK          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | 12.00%  | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | 12,677,834 | ​        | ​ | ​ | ​ | ​ | 12,677,834 | ​ | ​ | ​ | ​ | ​ | 6,678,442 | ​ | ​ | ​ | ​ | ​ | 4.24% | ​ | ​ |
| ​                                                                   | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 12,677,834 | ​ | ​ | ​ | ​ | ​ | 6,678,442 | ​ | ​ | ​ | ​ | ​ | 4.24% | ​ | ​ |
| Show Media, Inc., Units(2)                                                | ​ | ​ | Media & Entertainment                     | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | 4,092,210  | ​        | ​ | ​ | ​ | ​ | 3,747,428 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Southern Technical Institute, Inc., Class A Units(2)                 | ​ | ​ | Education                                     | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | 3,164,063  | ​        | ​ | ​ | ​ | $ | 2,167,000 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Preferred Shares                                                          | ​ | ​ | ​                                       | ​ | ​ | 15.75% PIK       | ​ | ​ | ​        | ​ | ​ | ​      | ​ | 15.75%  | ​      | ​ | ​ | ​                           | ​ | 3/30/2026 | ​ | ​ | ​ | ​    | ​ | 5,135,209  | ​        | ​ | ​ | ​ | ​ | 5,024,209 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Warrants(2)                                                               | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | 221,267    | ​        | ​ | ​ | ​ | ​ | 221,267 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| ​                                                                   | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 7,412,476 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Xpress Global Systems, LLC, Warrants(2)                                   | ​ | ​ | Transportation Logistics                      | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | 489,000    | ​        | ​ | ​ | ​ | ​ | 489,000 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Total Equity/Other                                                        | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 29,523,307 | ​ | ​ | ​ | ​ | ​ | 12,094,011 | ​ | ​ | ​ | ​ | ​ | 7.67% | ​ | ​ |
| Total Investments in Non-Controlled, Affiliated Portfolio Companies       | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 51,734,635 | ​ | ​ | ​ | ​ | ​ | 19,972,905 | ​ | ​ | ​ | ​ | ​ | 12.67% | ​ | ​ |
| Investments in Controlled, Affiliated Portfolio Companies — 9.67%** | ​ |
| Senior Secured – First Lien — 8.87%               | ​ |
| FST Technical Services, LLC                                               | ​ | ​ | Technology & Telecom                      | ​ | ​ | 12% Cash, 5% PIK | ​ | ​ | ​        | ​ | ​ | ​      | ​ | 17.00%  | ​      | ​ | ​ | ​                           | ​ | 6/30/2019 | ​ | ​ | ​ | ​    | ​ | 13,999,758 | ​        | ​ | ​ | ​ | $ | 13,999,758 | ​ | ​ | ​ | ​ | $ | 13,999,758 | ​ | ​ | ​ | ​ | ​ | 8.87% | ​ | ​ |
| Total Senior Secured – First Lien                       | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 13,999,758 | ​ | ​ | ​ | ​ | ​ | 13,999,758 | ​ | ​ | ​ | ​ | ​ | 8.87% | ​ | ​ |
| Equity/Other — 0.80%                                                | ​ |
| FST Technical Services, LLC, Common Class B Shares(2)                | ​ | ​ | Technology & Telecom                      | ​ | ​ | 9% PIK           | ​ | ​ | ​        | ​ | ​ | ​      | ​ | 9.00%   | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | 1,750,000  | ​        | ​ | ​ | ​ | $ | 1,806,543 | ​ | ​ | ​ | ​ | $ | 1,256,479 | ​ | ​ | ​ | ​ | ​ | 0.80% | ​ | ​ |
| Total Equity/Other                                                        | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 1,806,543 | ​ | ​ | ​ | ​ | ​ | 1,256,479 | ​ | ​ | ​ | ​ | ​ | 0.80% | ​ | ​ |
| Total Investments in Controlled, Affiliated Portfolio Companies           | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 15,806,301 | ​ | ​ | ​ | ​ | ​ | 15,256,237 | ​ | ​ | ​ | ​ | ​ | 9.67% | ​ | ​ |
| Total Investments                                                         | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | 333,216,534 | ​ | ​ | ​ | ​ | ​ | 287,554,545 | ​ | ​ | ​ | ​ | ​ | 182.33% | ​ | ​ |
| Liabilities In Excess Of Other Assets                                     | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | (129,840,370) | ​ | ​ | ​ | ​ | ​ | (82.33)% | ​ | ​ |
| Net Assets                                                                | ​ | ​ | ​                                       | ​ | ​ | ​          | ​ | ​ | ​        | ​ | ​ | ​      | ​ | ​ | ​      | ​ | ​ | ​                           | ​ | ​   | ​ | ​ | ​ | ​    | ​ | ​    | ​        | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | $ | 157,714,175 | ​ | ​ | ​ | ​ | ​ | 100.00% | ​ | ​ |
| ​                                                                   |
| Name of Issuers                    | ​ | ​ | Fair Value at December 31, 2016 | ​ | ​    | Gross Addition | ​ | ​ | Gross Reductions | ​ | ​ | Transfers In/Out | ​ | ​ | Paid-in-kind/​ Interest/​ Dividend/​ Other Income | ​ | ​ | Fair Value at December 31, 2017 | ​ |
|------------------------------------|---------|---------|--------------------------------------|---------|------------|----------------|---------|---------|------------------|---------|---------|------------------|---------|---------|---------------------------------------------------------------------|---------|---------|--------------------------------------|---------|
| Battery Solutions, Inc.            | ​ | ​ | ​                              | $       | 6,517,046  | ​        | ​ | ​ | ​          | $       | — | ​          | ​ | ​ | ​                                                             | $       | — | ​                              | ​ | ​ | ​ | $ | — | ​ | ​ | ​ | ​ | $ | 650,999 | ​ | ​ | ​ | ​ | $ | 7,820,167 | ​ | ​ |
| Conisus, LLC                       | ​ | ​ | ​                              | ​ | —    | ​        | ​ | ​ | ​          | ​ | — | ​          | ​ | ​ | ​                                                             | ​ | — | ​                              | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 1,121,469 | ​ | ​ | ​ | ​ | ​ | 6,678,442 | ​ | ​ |
| Show Media, Inc.                   | ​ | ​ | ​                              | ​ | 2,077,000  | ​        | ​ | ​ | ​          | ​ | — | ​          | ​ | ​ | ​                                                             | ​ | — | ​                              | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 95,164 | ​ | ​ | ​ | ​ | ​ | 1 | ​ | ​ |
| Southern Technical Institute, Inc. | ​ | ​ | ​                              | ​ | 13,500,157 | ​        | ​ | ​ | ​          | ​ | — | ​          | ​ | ​ | ​                                                             | ​ | — | ​                              | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 1,205,438 | ​ | ​ | ​ | ​ | ​ | 1 | ​ | ​ |
| Xpress Global Systems, LLC         | ​ | ​ | ​                              | ​ | —    | ​        | ​ | ​ | ​          | ​ | — | ​          | ​ | ​ | ​                                                             | ​ | — | ​                              | ​ | ​ | ​ | ​ | 7,475,203 | ​ | ​ | ​ | ​ | ​ | 455,272 | ​ | ​ | ​ | ​ | ​ | 5,474,294 | ​ | ​ |
| ​                            | ​ | ​ | ​                              | $       | 22,094,203 | ​        | ​ | ​ | ​          | $       | — | ​          | ​ | ​ | ​                                                             | $       | — | ​                              | ​ | ​ | ​ | $ | 7,475,203 | ​ | ​ | ​ | ​ | $ | 3,528,342 | ​ | ​ | ​ | ​ | $ | 19,972,905 | ​ | ​ |
| ​                            |

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| Name of Issuers             | ​ | ​ | Fair value at December 31, 2016 | ​ | ​    | Gross Additions | ​ | ​ | Gross Reductions | ​ | ​ | Transfers In/Out | ​ | ​ | Interest/​ Dividend/​ Other Income | ​ | ​ | Fair Value at December 31, 2017 | ​ |
|-----------------------------|---------|---------|--------------------------------------|---------|------------|-----------------|---------|---------|------------------|---------|---------|------------------|---------|---------|------------------------------------------------|---------|---------|--------------------------------------|---------|
| FST Technical Services, LLC | ​ | ​ | ​                              | $       | 14,456,630 | ​         | ​ | ​ | ​          | $       | — | ​          | ​ | ​ | ​                                        | $       | — | ​                              | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | 2,349,538 | ​ | ​ | ​ | ​ | $ | 15,256,237 | ​ | ​ |
| ​                     | ​ | ​ | ​                              | $       | 14,456,630 | ​         | ​ | ​ | ​          | $       | — | ​          | ​ | ​ | ​                                        | $       | — | ​                              | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | $ | 2,349,538 | ​ | ​ | ​ | ​ | $ | 15,256,237 | ​ | ​ |
| ​                     |

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| ​                                   | ​ | ​ | As of December 31, 2018 | ​ | ​   | As of December 31, 2017 | ​ | ​ | As of December 31, 2016 | ​ |
|-------------------------------------------|---------|---------|-------------------------|---------|-----------|-------------------------|---------|---------|-------------------------|---------|
| Distrubutable earnings (accumulated loss) | ​ | ​ | ​                 | ​ | 435,797   | ​                 | ​ | ​ | ​                 | ​ | 229,968 | ​ | ​ | ​ | ​ | ​ | 420,816 | ​ | ​ |
| Additional paid-in-capital                | ​ | ​ | ​                 | ​ | (435,797) | ​                 | ​ | ​ | ​                 | ​ | (229,968) | ​ | ​ | ​ | ​ | ​ | (420,816) | ​ | ​ |
| ​                     | ​ | ​ | As ofDecember 31, 2018 | ​ | ​   | As ofDecember 31, 2017 | ​ | ​ | As ofDecember 31, 2016 | ​ |
|-----------------------------|---------|---------|------------------------|---------|-----------|------------------------|---------|---------|------------------------|---------|
| Ordinary income             | ​ | ​ | ​                | $       | 9,631,948 | ​                | ​ | ​ | ​                | $       | 18,219,766 | ​ | ​ | ​ | ​ | $ | 18,351,553 | ​ | ​ |
| Net long-term capital gains | ​ | ​ | ​                | ​ | 260,467   | ​                | ​ | ​ | ​                | ​ | — | ​ | ​ | ​ | ​ | ​ | 4,596 | ​ | ​ |
| Total distributions paid    | ​ | ​ | ​                | $       | 9,892,415 | ​                | ​ | ​ | ​                | $       | 18,219,766 | ​ | ​ | ​ | ​ | $ | 18,356,149 | ​ | ​ |
| ​                     |
| ​                                              | ​ | ​ | As ofDecember 31, 2018 | ​ | ​      | As ofDecember 31, 2017 | ​ | ​ | As ofDecember 31, 2016 | ​ |
|------------------------------------------------------|---------|---------|------------------------|---------|--------------|------------------------|---------|---------|------------------------|---------|
| Undistributed net investment income                  | ​ | ​ | ​                | $       | 11,182,519   | ​                | ​ | ​ | ​                | $       | 6,369,243 | ​ | ​ | ​ | ​ | $ | 6,262,940 | ​ | ​ |
| Accumulated net realized gains (losses)              | ​ | ​ | ​                | ​ | (34,114,588) | ​                | ​ | ​ | ​                | ​ | 260,467 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Unrealized appreciation (depreciation)               | ​ | ​ | ​                | ​ | (9,354,399)  | ​                | ​ | ​ | ​                | ​ | (36,742,515) | ​ | ​ | ​ | ​ | ​ | (12,564,546) | ​ | ​ |
| Components of tax distributable earnings at year end | ​ | ​ | ​                | $       | (32,286,468) | ​                | ​ | ​ | ​                | $       | (30,112,805) | ​ | ​ | ​ | ​ | $ | (6,301,606) | ​ | ​ |
| ​                                              |

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| ​                                        | ​ | ​ | Level 1 | ​ | ​ | Level 2 | ​ | ​ | Level 3 | ​ | ​   | Total   | ​ |
|------------------------------------------------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|-----------|---------|---------|
| Senior Secured – First Lien  | ​ | ​ | ​ | $       | — | ​ | ​ | ​ | ​ | $       | 3,800,000 | ​ | ​ | ​ | ​ | $ | 164,354,929 | ​ | ​ | ​ | ​ | $ | 168,154,929 | ​ | ​ |
| Senior Secured – Second Lien | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | —   | ​ | ​ | ​ | ​ | ​ | 42,549,396 | ​ | ​ | ​ | ​ | ​ | 42,549,396 | ​ | ​ |
| Subordinated Debt                              | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | —   | ​ | ​ | ​ | ​ | ​ | 1,212,774 | ​ | ​ | ​ | ​ | ​ | 1,212,774 | ​ | ​ |
| CLO/Structured Credit                          | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 1,739,600 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 1,739,600 | ​ | ​ |
| Equity/Other                                   | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | —   | ​ | ​ | ​ | ​ | ​ | 21,141,117 | ​ | ​ | ​ | ​ | ​ | 21,141,117 | ​ | ​ |
| Total Investments                              | ​ | ​ | ​ | $       | — | ​ | ​ | ​ | ​ | $       | 5,539,600 | ​ | ​ | ​ | ​ | $ | 229,258,216 | ​ | ​ | ​ | ​ | $ | 234,797,816 | ​ | ​ |
| ​                                        |
| ​                                        | ​ | ​ | Level 1 | ​ | ​ | Level 2 | ​ | ​ | Level 3 | ​ | ​ | Total   | ​ |
|------------------------------------------------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|
| Senior Secured – First Lien  | ​ | ​ | ​ | $       | — | ​ | ​ | ​ | ​ | $       | — | ​ | ​ | ​ | ​ | $ | 177,340,027 | ​ | ​ | ​ | ​ | $ | 177,340,027 | ​ | ​ |
| Senior Secured – Second Lien | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 14,203,691 | ​ | ​ | ​ | ​ | ​ | 14,203,691 | ​ | ​ |
| Subordinated Debt                              | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 66,884,849 | ​ | ​ | ​ | ​ | ​ | 66,884,849 | ​ | ​ |
| Equity/Other                                   | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 29,125,978 | ​ | ​ | ​ | ​ | ​ | 29,125,978 | ​ | ​ |
| Total investments                              | ​ | ​ | ​ | $       | — | ​ | ​ | ​ | ​ | $       | — | ​ | ​ | ​ | ​ | $ | 287,554,545 | ​ | ​ | ​ | ​ | $ | 287,554,545 | ​ | ​ |
| ​                                        |
| ​                                                                                                  | ​ | ​ | Senior Secured –  First Lien | ​ | ​      | Senior Secured –  Second Lien | ​ | ​ | Senior Subordinated | ​ | ​     | Equity/​ Other | ​ | ​ | Total   | ​ |
|----------------------------------------------------------------------------------------------------------|---------|---------|------------------------------------------------|---------|--------------|-------------------------------------------------|---------|---------|---------------------|---------|-------------|----------------------|---------|---------|---------|---------|
| Balance as of January 1, 2018                                                                            | ​ | ​ | ​                                        | $       | 177,340,027  | ​                                         | ​ | ​ | ​             | $       | 14,203,691  | ​              | ​ | ​ | ​ | $       | 66,884,849 | ​ | ​ | ​ | ​ | $ | 29,125,978 | ​ | ​ | ​ | ​ | $ | 287,554,545 | ​ | ​ |
| Amortized discounts/premiums                                                                             | ​ | ​ | ​                                        | ​ | 574,732      | ​                                         | ​ | ​ | ​             | ​ | 81,499      | ​              | ​ | ​ | ​ | ​ | 276,174 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | 932,405 | ​ | ​ |
| Paid in-kind interest                                                                                    | ​ | ​ | ​                                        | ​ | 226,418      | ​                                         | ​ | ​ | ​             | ​ | —     | ​              | ​ | ​ | ​ | ​ | 335,895 | ​ | ​ | ​ | ​ | ​ | 348,448 | ​ | ​ | ​ | ​ | ​ | 910,761 | ​ | ​ |
| Net realized gain (loss)                                                                                 | ​ | ​ | ​                                        | ​ | (6,379,040)  | ​                                         | ​ | ​ | ​             | ​ | (5,986,463) | ​              | ​ | ​ | ​ | ​ | (17,817,001) | ​ | ​ | ​ | ​ | ​ | (5,077,702) | ​ | ​ | ​ | ​ | ​ | (35,260,206) | ​ | ​ |
| Net change in unrealized appreciation (depreciation)                                                     | ​ | ​ | ​                                        | ​ | 4,733,882    | ​                                         | ​ | ​ | ​             | ​ | 2,015,170   | ​              | ​ | ​ | ​ | ​ | 19,434,590 | ​ | ​ | ​ | ​ | ​ | 606,275 | ​ | ​ | ​ | ​ | ​ | 26,789,917 | ​ | ​ |
| Purchases                                                                                                | ​ | ​ | ​                                        | ​ | 62,350,940   | ​                                         | ​ | ​ | ​             | ​ | 33,489,499  | ​              | ​ | ​ | ​ | ​ | (466) | ​ | ​ | ​ | ​ | ​ | 1,539,048 | ​ | ​ | ​ | ​ | ​ | 97,379,021 | ​ | ​ |
| Sales/Return of capital                                                                                  | ​ | ​ | ​                                        | ​ | (74,492,030) | ​                                         | ​ | ​ | ​             | ​ | (1,254,000) | ​              | ​ | ​ | ​ | ​ | (67,901,267) | ​ | ​ | ​ | ​ | ​ | (5,400,930) | ​ | ​ | ​ | ​ | ​ | (149,048,227) | ​ | ​ |
| Transfers in                                                                                             | ​ | ​ | ​                                        | ​ | —      | ​                                         | ​ | ​ | ​             | ​ | —     | ​              | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Transfers out                                                                                            | ​ | ​ | ​                                        | ​ | —      | ​                                         | ​ | ​ | ​             | ​ | —     | ​              | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Balance as of December 31, 2018                                                                          | ​ | ​ | ​                                        | $       | 164,354,929  | ​                                         | ​ | ​ | ​             | $       | 42,549,396  | ​              | ​ | ​ | ​ | $       | 1,212,774 | ​ | ​ | ​ | ​ | $ | 21,141,117 | ​ | ​ | ​ | ​ | $ | 229,258,216 | ​ | ​ |
| Net change in unrealized appreciation (depreciation) from investments still held as of December 31, 2018 | ​ | ​ | ​                                        | $       | (147,447)    | ​                                         | ​ | ​ | ​             | $       | 287,169     | ​              | ​ | ​ | ​ | $       | 1 | ​ | ​ | ​ | ​ | $ | (6,932,055) | ​ | ​ | ​ | ​ | $ | (6,792,332) | ​ | ​ |
| ​                                                                                                  |

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| ​                                                                                                  | ​ | ​ | Senior Secured –  First Lien | ​ | ​      | Senior Secured –  Second Lien | ​ | ​ | Senior Subordinated | ​ | ​      | Equity/​ Other | ​ | ​ | Total   | ​ |
|----------------------------------------------------------------------------------------------------------|---------|---------|------------------------------------------------|---------|--------------|-------------------------------------------------|---------|---------|---------------------|---------|--------------|----------------------|---------|---------|---------|---------|
| Balance as of January 1, 2017                                                                            | ​ | ​ | ​                                        | $       | 95,684,153   | ​                                         | ​ | ​ | ​             | $       | 84,864,909   | ​              | ​ | ​ | ​ | $       | 74,050,349 | ​ | ​ | ​ | ​ | $ | 21,673,539 | ​ | ​ | ​ | ​ | $ | 276,272,950 | ​ | ​ |
| Amortized discounts/premiums                                                                             | ​ | ​ | ​                                        | ​ | 729,607      | ​                                         | ​ | ​ | ​             | ​ | 1,016,258    | ​              | ​ | ​ | ​ | ​ | 146,019 | ​ | ​ | ​ | ​ | ​ | 13,867 | ​ | ​ | ​ | ​ | ​ | 1,905,751 | ​ | ​ |
| Paid in-kind interest                                                                                    | ​ | ​ | ​                                        | ​ | 958,229      | ​                                         | ​ | ​ | ​             | ​ | 1,328,351    | ​              | ​ | ​ | ​ | ​ | 981,139 | ​ | ​ | ​ | ​ | ​ | 782,314 | ​ | ​ | ​ | ​ | ​ | 4,050,033 | ​ | ​ |
| Net realized gain (loss)                                                                                 | ​ | ​ | ​                                        | ​ | (10,000)     | ​                                         | ​ | ​ | ​             | ​ | (10,405,104) | ​              | ​ | ​ | ​ | ​ | 73 | ​ | ​ | ​ | ​ | ​ | (1,019,860) | ​ | ​ | ​ | ​ | ​ | (11,434,891) | ​ | ​ |
| Net change in unrealized appreciation (depreciation)                                                     | ​ | ​ | ​                                        | ​ | (2,492,521)  | ​                                         | ​ | ​ | ​             | ​ | (7,261,074)  | ​              | ​ | ​ | ​ | ​ | (10,602,783) | ​ | ​ | ​ | ​ | ​ | (8,242,492) | ​ | ​ | ​ | ​ | ​ | (28,598,870) | ​ | ​ |
| Purchases                                                                                                | ​ | ​ | ​                                        | ​ | 118,756,622  | ​                                         | ​ | ​ | ​             | ​ | 19,145,193   | ​              | ​ | ​ | ​ | ​ | 2,310,319 | ​ | ​ | ​ | ​ | ​ | 19,998,749 | ​ | ​ | ​ | ​ | ​ | 160,210,883 | ​ | ​ |
| Sales/Return of capital                                                                                  | ​ | ​ | ​                                        | ​ | (36,286,063) | ​                                         | ​ | ​ | ​             | ​ | (74,484,842) | ​              | ​ | ​ | ​ | ​ | (267) | ​ | ​ | ​ | ​ | ​ | (4,080,139) | ​ | ​ | ​ | ​ | ​ | (114,851,311) | ​ | ​ |
| Transfers in                                                                                             | ​ | ​ | ​                                        | ​ | —      | ​                                         | ​ | ​ | ​             | ​ | —      | ​              | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Transfers out                                                                                            | ​ | ​ | ​                                        | ​ | —      | ​                                         | ​ | ​ | ​             | ​ | —      | ​              | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Balance as of December 31, 2017                                                                          | ​ | ​ | ​                                        | $       | 177,340,027  | ​                                         | ​ | ​ | ​             | $       | 14,203,691   | ​              | ​ | ​ | ​ | $       | 66,884,849 | ​ | ​ | ​ | ​ | $ | 29,125,978 | ​ | ​ | ​ | ​ | $ | 287,554,545 | ​ | ​ |
| Net change in unrealized appreciation (depreciation) from investments still held as of December 31, 2017 | ​ | ​ | ​                                        | $       | (2,266,477)  | ​                                         | ​ | ​ | ​             | $       | (8,056,827)  | ​              | ​ | ​ | ​ | $       | (10,602,708) | ​ | ​ | ​ | ​ | $ | (9,234,253) | ​ | ​ | ​ | ​ | $ | (30,160,265) | ​ | ​ |
| ​                                                                                                  |
| Assets at Fair Value                           | ​ | ​ | Fair Value at December 31, 2018 | ​ | ​     | ValuationTechnique | ​ | ​ | Unobservable Input | ​ | ​ | Range ofInputs                                                       | ​ | ​ | WeightedAverage                 | ​ |
|------------------------------------------------|---------|---------|---------------------------------|---------|-------------|--------------------|---------|---------|--------------------|---------|---------|----------------------------------------------------------------------|---------|---------|---------------------------------|---------|
| Senior Secured – First Lien  | ​ | ​ | ​                         | $       | 164,354,929 | ​            | ​ | ​ | Yield to Maturity  | ​ | ​ | Comparable Market Rate                                               | ​ | ​ | 7.0% – 14.0%  | ​ | ​ | ​ | ​ | 10.7% | ​ | ​ |
| Senior Secured – Second Lien | ​ | ​ | ​                         | ​ | 42,549,396  | ​            | ​ | ​ | Yield to Maturity  | ​ | ​ | Comparable Market Rate                                               | ​ | ​ | 10.3% – 13.0% | ​ | ​ | ​ | ​ | 11.0% | ​ | ​ |
| Senior Subordinated                            | ​ | ​ | ​                         | ​ | 1,212,774   | ​            | ​ | ​ | Yield to Maturity  | ​ | ​ | Comparable Market Rate                                               | ​ | ​ | 14.0%                           | ​ | ​ | ​ | ​ | 14.0% | ​ | ​ |
| Preferred Ownership                            | ​ | ​ | ​                         | ​ | 16,914,223  | ​            | ​ | ​ | Market Approach    | ​ | ​ | Enterprise Value/​LTM EBITDA Multiple/​Transaction price | ​ | ​ | 5.5x – 12.0x  | ​ | ​ | ​ | ​ | 7.4x | ​ | ​ |
| Common Ownership/Common Warrants               | ​ | ​ | ​                         | ​ | 4,226,894   | ​            | ​ | ​ | Market Approach    | ​ | ​ | Enterprise Value/​LTM EBITDA Multiple/​Transaction price | ​ | ​ | 4.5x – 12.0x  | ​ | ​ | ​ | ​ | 8.1x | ​ | ​ |
| Total                                          | ​ | ​ | ​                         | $       | 229,258,216 | ​            | ​ | ​ | ​            | ​ | ​ |
| ​                                        |
| Assets at Fair Value                           | ​ | ​ | Fair Value at December 31, 2017 | ​ | ​     | ValuationTechnique | ​ | ​ | Unobservable Input | ​ | ​ | Range ofInputs                              | ​ | ​ | WeightedAverage                 | ​ |
|------------------------------------------------|---------|---------|---------------------------------|---------|-------------|--------------------|---------|---------|--------------------|---------|---------|---------------------------------------------|---------|---------|---------------------------------|---------|
| Senior Secured – First Lien  | ​ | ​ | ​                         | $       | 177,340,027 | ​            | ​ | ​ | Yield to Maturity  | ​ | ​ | Comparable Market Rate                      | ​ | ​ | 8.0% – 17.0%  | ​ | ​ | ​ | ​ | 10.9% | ​ | ​ |
| Senior Secured – Second Lien | ​ | ​ | ​                         | ​ | 14,203,691  | ​            | ​ | ​ | Yield to Maturity  | ​ | ​ | Comparable Market Rate                      | ​ | ​ | 12.3% – 25.0% | ​ | ​ | ​ | ​ | 15.0% | ​ | ​ |
| Senior Subordinated                            | ​ | ​ | ​                         | ​ | 66,884,849  | ​            | ​ | ​ | Yield to Maturity  | ​ | ​ | Comparable Market Rate                      | ​ | ​ | 4.0% – 14.7%  | ​ | ​ | ​ | ​ | 12.7% | ​ | ​ |
| Preferred Ownership                            | ​ | ​ | ​                         | ​ | 19,751,824  | ​            | ​ | ​ | Market Approach    | ​ | ​ | Enterprise Value/​LTM EBITDA Multiple | ​ | ​ | 4.5x – 13.0x  | ​ | ​ | ​ | ​ | 9.3x | ​ | ​ |

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| Assets at Fair Value             | ​ | ​ | Fair Value atDecember 31,2017 | ​ | ​     | ValuationTechnique | ​ | ​ | UnobservableInput | ​ | ​ | Range ofInputs                              | ​ | ​ | WeightedAverage                | ​ |
|----------------------------------|---------|---------|-------------------------------|---------|-------------|--------------------|---------|---------|-------------------|---------|---------|---------------------------------------------|---------|---------|--------------------------------|---------|
| Common Ownership/Common Warrants | ​ | ​ | ​                       | ​ | 9,374,154   | ​            | ​ | ​ | Market Approach   | ​ | ​ | Enterprise Value/​LTM EBITDA Multiple | ​ | ​ | 4.5x – 13.0x | ​ | ​ | ​ | ​ | 8.3x | ​ | ​ |
| Total                            | ​ | ​ | ​                       | $       | 287,554,545 | ​            | ​ | ​ | ​           | ​ | ​ |
| ​                          |
| Month Ended   | ​ | ​ | Shares Repurchased | ​ | ​   | Repurchase Price Per Share | ​ | ​ | Aggregate Consideration for Repurchased Shares | ​ |
|---------------|---------|---------|--------------------|---------|-----------|----------------------------|---------|---------|------------------------------------------------|---------|
| January 2018  | ​ | ​ | ​            | ​ | 16,786    | ​                    | ​ | ​ | ​                                        | $       | 8.01 – $8.22 | ​ | ​ | ​ | ​ | $ | 136,949 | ​ | ​ |
| March 2018    | ​ | ​ | ​            | ​ | 195,785   | ​                    | ​ | ​ | ​                                        | $       | 6.05 – $7.24 | ​ | ​ | ​ | ​ | ​ | 1,373,656 | ​ | ​ |
| April 2018    | ​ | ​ | ​            | ​ | 231,343   | ​                    | ​ | ​ | ​                                        | $       | 6.12 – $7.20 | ​ | ​ | ​ | ​ | ​ | 1,599,304 | ​ | ​ |
| May 2018      | ​ | ​ | ​            | ​ | 136,819   | ​                    | ​ | ​ | ​                                        | $       | 6.18 – $6.85 | ​ | ​ | ​ | ​ | ​ | 901,837 | ​ | ​ |
| June 2018     | ​ | ​ | ​            | ​ | 59,461    | ​                    | ​ | ​ | ​                                        | $       | 6.30 – $6.80 | ​ | ​ | ​ | ​ | ​ | 397,913 | ​ | ​ |
| July 2018     | ​ | ​ | ​            | ​ | 49,974    | ​                    | ​ | ​ | ​                                        | $       | 6.13 – $6.48 | ​ | ​ | ​ | ​ | ​ | 316,614 | ​ | ​ |
| August 2018   | ​ | ​ | ​            | ​ | 15,543    | ​                    | ​ | ​ | ​                                        | $       | 6.12 – $6.22 | ​ | ​ | ​ | ​ | ​ | 96,727 | ​ | ​ |
| December 2018 | ​ | ​ | ​            | ​ | 411,939   | ​                    | ​ | ​ | ​                                        | $       | 6.20 – $6.88 | ​ | ​ | ​ | ​ | ​ | 2,718,360 | ​ | ​ |
| Total         | ​ | ​ | ​            | ​ | 1,117,650 | ​                    | ​ | ​ | ​                                        | ​ | ​ | ​ | ​ | ​ | ​ | $ | 7,541,360 | ​ | ​ |
| ​       |
| Month Ended   | ​ | ​ | Shares Repurchased | ​ | ​ | Repurchase Price Per Share | ​ | ​ | Aggregate Consideration for Repurchased Shares | ​ |
|---------------|---------|---------|--------------------|---------|---------|----------------------------|---------|---------|------------------------------------------------|---------|
| January 2017  | ​ | ​ | ​            | ​ | 14,574  | ​                    | ​ | ​ | $12.13 – $12.49              | ​ | ​ | ​ | $ | 165,514 | ​ | ​ |
| November 2017 | ​ | ​ | ​            | ​ | 21,400  | ​                    | ​ | ​ | $7.74 – $8.00                | ​ | ​ | ​ | ​ | 169,742 | ​ | ​ |
| December 2017 | ​ | ​ | ​            | ​ | 875     | ​                    | ​ | ​ | $8.25 ​                            | ​ | ​ | ​ | ​ | 7,254 | ​ | ​ |
| Total         | ​ | ​ | ​            | ​ | 36,849  | ​                    | ​ | ​ | ​                                        | ​ | ​ | ​ | $ | 342,510 | ​ | ​ |
| ​       |

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| Month Ended   | ​ | ​ | Shares Repurchased | ​ | ​ | Repurchase Price Per Share | ​ | ​ | Aggregate Consideration for Repurchased Shares | ​ |
|---------------|---------|---------|--------------------|---------|---------|----------------------------|---------|---------|------------------------------------------------|---------|
| March 2016    | ​ | ​ | ​            | ​ | 10,509  | ​                    | ​ | ​ | ​                                        | $       | 10.77 – $11.24 | ​ | ​ | ​ | ​ | $ | 115,828 | ​ | ​ |
| May 2016      | ​ | ​ | ​            | ​ | 9,547   | ​                    | ​ | ​ | ​                                        | $       | 11.56 – $12.33 | ​ | ​ | ​ | ​ | ​ | 114,762 | ​ | ​ |
| June 2016     | ​ | ​ | ​            | ​ | 6,074   | ​                    | ​ | ​ | ​                                        | $       | 12.23 – $12.36 | ​ | ​ | ​ | ​ | ​ | 74,860 | ​ | ​ |
| November 2016 | ​ | ​ | ​            | ​ | 17,003  | ​                    | ​ | ​ | ​                                        | $       | 11.50 – $12.30 | ​ | ​ | ​ | ​ | ​ | 203,026 | ​ | ​ |
| December 2016 | ​ | ​ | ​            | ​ | 22,000  | ​                    | ​ | ​ | ​                                        | $       | 11.65 – $12.49 | ​ | ​ | ​ | ​ | ​ | 267,146 | ​ | ​ |
| Total         | ​ | ​ | ​            | ​ | 65,133  | ​                    | ​ | ​ | ​                                        | ​ | ​ | ​ | ​ | ​ | ​ | $ | 775,622 | ​ | ​ |
| ​       |
| Date Declared    | ​ | ​ | Record Date        | ​ | ​ | Payment Date    | ​ | ​ | Amount Per Share | ​ |
|------------------|---------|---------|--------------------|---------|---------|-----------------|---------|---------|------------------|---------|
| March 8, 2018    | ​ | ​ | March 30, 2018     | ​ | ​ | April 4, 2018   | ​ | ​ | ​          | $       | 0.180 | ​ | ​ |
| May 4, 2018      | ​ | ​ | June 29, 2018      | ​ | ​ | July 5, 2018    | ​ | ​ | ​          | $       | 0.180 | ​ | ​ |
| August 6, 2018   | ​ | ​ | September 28, 2018 | ​ | ​ | October 4, 2018 | ​ | ​ | ​          | $       | 0.180 | ​ | ​ |
| November 5, 2018 | ​ | ​ | December 31, 2018  | ​ | ​ | January 3, 2019 | ​ | ​ | ​          | $       | 0.180 | ​ | ​ |
| Date Declared | ​ | ​ | Record Date    | ​ | ​ | Payment Date  | ​ | ​ | Amount Per Share | ​ |
|---------------|---------|---------|----------------|---------|---------|---------------|---------|---------|------------------|---------|
| March 9, 2017 | ​ | ​ | March 31, 2017 | ​ | ​ | April 6, 2017 | ​ | ​ | ​          | $       | 0.340 | ​ | ​ |
| March 9, 2017 | ​ | ​ | March 31, 2017 | ​ | ​ | April 6, 2017 | ​ | ​ | ​          | $       | 0.030 | ​ | ​ |
| May 4, 2017   | ​ | ​ | June 30, 2017  | ​ | ​ | July 6, 2017  | ​ | ​ | ​          | $       | 0.340 | ​ | ​ |

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| Date Declared    | ​ | ​ | Record Date        | ​ | ​ | Payment Date    | ​ | ​ | Amount Per Share | ​ |
|------------------|---------|---------|--------------------|---------|---------|-----------------|---------|---------|------------------|---------|
| August 3, 2017   | ​ | ​ | September 30, 2017 | ​ | ​ | October 5, 2017 | ​ | ​ | ​          | $       | 0.340 | ​ | ​ |
| November 2, 2017 | ​ | ​ | December 29, 2017  | ​ | ​ | January 4, 2018 | ​ | ​ | ​          | $       | 0.250 | ​ | ​ |

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| ​                                                                    | ​ | ​ | For the year ended December 31, 2018 | ​ | ​     | For the year ended December 31, 2017 | ​ | ​ | For the year ended December 31, 2016 | ​ |
|----------------------------------------------------------------------------|---------|---------|--------------------------------------|---------|-------------|--------------------------------------|---------|---------|--------------------------------------|---------|
| Investment purchases, at cost (including PIK interest and dividends)       | ​ | ​ | ​                              | $       | 105,758,107 | ​                              | ​ | ​ | ​                              | $       | 139,558,602 | ​ | ​ | ​ | ​ | $ | 151,765,946 | ​ | ​ |
| Investment sales, proceeds (including Principal payments/paydown proceeds) | ​ | ​ | ​                              | ​ | 150,613,843 | ​                              | ​ | ​ | ​                              | ​ | 90,148,997 | ​ | ​ | ​ | ​ | ​ | 158,805,461 | ​ | ​ |
| ​ | Tenor at Origination (in years) | ​ | ​ | Principal Amount (000’s omitted) | ​ | ​ | Interest Rate Range | ​ | ​ | Weighted Average Interest Rate  | ​ | ​ | Maturity Date Range | ​ |
|---------|---------------------------------|---------|---------|----------------------------------------|---------|---------|---------------------|---------|---------|---------------------------------|---------|---------|---------------------|---------|
| ​ | 5                               | ​ | ​ | ​                                | $       | 53,582  | ​             | ​ | ​ | 6.25% – 6.50% | ​ | ​ | ​             | ​ | 6.38% | ​ | ​ | ​ | February 15, 2020 – June 15, 2021​ | ​ |
| ​ | 7                               | ​ | ​ | ​                                | ​ | 1,418   | ​             | ​ | ​ | 6.50% – 6.75% | ​ | ​ | ​             | ​ | 6.63% | ​ | ​ | ​ | January 15, 2022 – April 15, 2022​ | ​ |
| ​ | ​                         | ​ | ​ | ​                                | $       | 55,000  | ​             | ​ | ​ | ​                         | ​ | ​ | ​             | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| ​ |

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| ​                                           | ​ | ​ | As of             | ​ |
|---------------------------------------------------|---------|---------|-------------------|---------|
| ​                                           | ​ | ​ | December 31, 2018 | ​ | ​ | December 31, 2017 | ​ |
| Pharmalogic Holdings Corp.                        | ​ | ​ | ​           | $       | 4,760,000 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ |
| Clanwilliam Group Ltd.                            | ​ | ​ | ​           | ​ | 3,753,476 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Superior Controls, Inc.                           | ​ | ​ | ​           | ​ | 2,500,000 | ​ | ​ | ​ | ​ | ​ | 2,500,000 | ​ | ​ |
| CGGR Operations Holding Corporation               | ​ | ​ | ​           | ​ | 2,000,000 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |
| Healthcare Associates of Texas, LLC               | ​ | ​ | ​           | ​ | 1,572,225 | ​ | ​ | ​ | ​ | ​ | 6,900,000 | ​ | ​ |
| Epic Healthcare Staffing Intermediate Holdco, LLC | ​ | ​ | ​           | ​ | 363,637 | ​ | ​ | ​ | ​ | ​ | 4,000,000 | ​ | ​ |
| Manna Pro Products, LLC                           | ​ | ​ | ​           | ​ | 92,764 | ​ | ​ | ​ | ​ | ​ | — | ​ | ​ |

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| ​                      | ​ | ​ | As of             | ​ |
|------------------------------|---------|---------|-------------------|---------|
| ​                      | ​ | ​ | December 31, 2018 | ​ | ​ | December 31, 2017 | ​ |
| Pharmalogics Recruiting, LLC | ​ | ​ | ​           | ​ | — | ​ | ​ | ​ | ​ | ​ | 2,000,000 | ​ | ​ |
| NTI Holdings, LLC            | ​ | ​ | ​           | ​ | — | ​ | ​ | ​ | ​ | ​ | 1,258,540 | ​ | ​ |
| IGT                          | ​ | ​ | ​           | ​ | — | ​ | ​ | ​ | ​ | ​ | 500,000 | ​ | ​ |
| Total                        | ​ | ​ | ​           | $       | 15,042,102 | ​ | ​ | ​ | ​ | $ | 17,158,540 | ​ | ​ |
| ​                      |
| ​                                        | ​ | ​ | Cost    | ​ | ​     | Fair Value | ​ | ​ | % of Net Assets* | ​ |
|------------------------------------------------|---------|---------|---------|---------|-------------|------------|---------|---------|------------------|---------|
| Investment Type                                | ​ | ​ | ​ | ​ | ​     | ​    | ​ | ​ | ​          | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Senior Secured – First Lien  | ​ | ​ | ​ | $       | 167,745,286 | ​    | ​ | ​ | ​          | $       | 168,154,929 | ​ | ​ | ​ | ​ | ​ | 115.33% | ​ | ​ |
| Senior Secured – Second Lien | ​ | ​ | ​ | ​ | 42,210,313  | ​    | ​ | ​ | ​          | ​ | 42,549,396 | ​ | ​ | ​ | ​ | ​ | 29.18% | ​ | ​ |
| Equity/Other                                   | ​ | ​ | ​ | ​ | 37,232,929  | ​    | ​ | ​ | ​          | ​ | 21,141,117 | ​ | ​ | ​ | ​ | ​ | 14.50% | ​ | ​ |
| CLO/Structured Credit                          | ​ | ​ | ​ | ​ | 1,948,058   | ​    | ​ | ​ | ​          | ​ | 1,739,600 | ​ | ​ | ​ | ​ | ​ | 1.20% | ​ | ​ |
| Senior Subordinated                            | ​ | ​ | ​ | ​ | 4,741,760   | ​    | ​ | ​ | ​          | ​ | 1,212,774 | ​ | ​ | ​ | ​ | ​ | 0.83% | ​ | ​ |
| Total                                          | ​ | ​ | ​ | $       | 253,878,346 | ​    | ​ | ​ | ​          | $       | 234,797,816 | ​ | ​ | ​ | ​ | ​ | 161.04% | ​ | ​ |
| Geographic Region†                       | ​ | ​ | ​ | ​ | ​     | ​    | ​ | ​ | ​          | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| West                                           | ​ | ​ | ​ | $       | 52,427,327  | ​    | ​ | ​ | ​          | $       | 54,266,593 | ​ | ​ | ​ | ​ | ​ | 37.22% | ​ | ​ |
| Southeast                                      | ​ | ​ | ​ | ​ | 56,535,014  | ​    | ​ | ​ | ​          | ​ | 44,026,689 | ​ | ​ | ​ | ​ | ​ | 30.20% | ​ | ​ |
| South                                          | ​ | ​ | ​ | ​ | 45,437,808  | ​    | ​ | ​ | ​          | ​ | 43,758,859 | ​ | ​ | ​ | ​ | ​ | 30.01% | ​ | ​ |
| Northeast                                      | ​ | ​ | ​ | ​ | 43,622,806  | ​    | ​ | ​ | ​          | ​ | 38,144,071 | ​ | ​ | ​ | ​ | ​ | 26.16% | ​ | ​ |
| Midwest                                        | ​ | ​ | ​ | ​ | 24,841,625  | ​    | ​ | ​ | ​          | ​ | 23,614,916 | ​ | ​ | ​ | ​ | ​ | 16.20% | ​ | ​ |
| Canada                                         | ​ | ​ | ​ | ​ | 22,721,398  | ​    | ​ | ​ | ​          | ​ | 22,900,000 | ​ | ​ | ​ | ​ | ​ | 15.71% | ​ | ​ |
| Ireland                                        | ​ | ​ | ​ | ​ | 6,344,310   | ​    | ​ | ​ | ​          | ​ | 6,347,088 | ​ | ​ | ​ | ​ | ​ | 4.35% | ​ | ​ |
| US (CLO)                                       | ​ | ​ | ​ | ​ | 1,948,058   | ​    | ​ | ​ | ​          | ​ | 1,739,600 | ​ | ​ | ​ | ​ | ​ | 1.19% | ​ | ​ |
| Total                                          | ​ | ​ | ​ | $       | 253,878,346 | ​    | ​ | ​ | ​          | $       | 234,797,816 | ​ | ​ | ​ | ​ | ​ | 161.04% | ​ | ​ |
| Industry†                                | ​ | ​ | ​ | ​ | ​     | ​    | ​ | ​ | ​          | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Business Services                              | ​ | ​ | ​ | $       | 45,913,805  | ​    | ​ | ​ | ​          | $       | 46,130,114 | ​ | ​ | ​ | ​ | ​ | 31.64% | ​ | ​ |
| Healthcare Services                            | ​ | ​ | ​ | ​ | 44,727,905  | ​    | ​ | ​ | ​          | ​ | 45,038,816 | ​ | ​ | ​ | ​ | ​ | 30.89% | ​ | ​ |
| Technology & Telecom                       | ​ | ​ | ​ | ​ | 32,324,555  | ​    | ​ | ​ | ​          | ​ | 33,345,749 | ​ | ​ | ​ | ​ | ​ | 22.87% | ​ | ​ |
| Consumer Services                              | ​ | ​ | ​ | ​ | 26,231,367  | ​    | ​ | ​ | ​          | ​ | 26,237,699 | ​ | ​ | ​ | ​ | ​ | 17.99% | ​ | ​ |
| Industrial Services                            | ​ | ​ | ​ | ​ | 21,095,416  | ​    | ​ | ​ | ​          | ​ | 19,559,789 | ​ | ​ | ​ | ​ | ​ | 13.42% | ​ | ​ |
| Retail                                         | ​ | ​ | ​ | ​ | 12,051,199  | ​    | ​ | ​ | ​          | ​ | 12,119,708 | ​ | ​ | ​ | ​ | ​ | 8.31% | ​ | ​ |
| Oil & Gas Services                         | ​ | ​ | ​ | ​ | 11,385,108  | ​    | ​ | ​ | ​          | ​ | 11,382,254 | ​ | ​ | ​ | ​ | ​ | 7.81% | ​ | ​ |
| Wholesale/Distribution                         | ​ | ​ | ​ | ​ | 10,189,394  | ​    | ​ | ​ | ​          | ​ | 10,614,192 | ​ | ​ | ​ | ​ | ​ | 7.28% | ​ | ​ |
| High Tech Industries                           | ​ | ​ | ​ | ​ | 8,701,223   | ​    | ​ | ​ | ​          | ​ | 8,729,396 | ​ | ​ | ​ | ​ | ​ | 5.99% | ​ | ​ |
| Media: Advertising, Printing & Publishing  | ​ | ​ | ​ | ​ | 12,677,834  | ​    | ​ | ​ | ​          | ​ | 6,554,225 | ​ | ​ | ​ | ​ | ​ | 4.50% | ​ | ​ |
| Environmental/Recycling Services               | ​ | ​ | ​ | ​ | 6,757,790   | ​    | ​ | ​ | ​          | ​ | 5,699,791 | ​ | ​ | ​ | ​ | ​ | 3.91% | ​ | ​ |
| Telecommunications                             | ​ | ​ | ​ | ​ | 4,410,000   | ​    | ​ | ​ | ​          | ​ | 4,410,000 | ​ | ​ | ​ | ​ | ​ | 3.02% | ​ | ​ |
| USD CLO                                        | ​ | ​ | ​ | ​ | 1,948,058   | ​    | ​ | ​ | ​          | ​ | 1,739,600 | ​ | ​ | ​ | ​ | ​ | 1.19% | ​ | ​ |
| Security                                       | ​ | ​ | ​ | ​ | 5,485,401   | ​    | ​ | ​ | ​          | ​ | 1,023,999 | ​ | ​ | ​ | ​ | ​ | 0.70% | ​ | ​ |
| Waste Services                                 | ​ | ​ | ​ | ​ | 2,529,303   | ​    | ​ | ​ | ​          | ​ | 820,437 | ​ | ​ | ​ | ​ | ​ | 0.56% | ​ | ​ |
| Transportation Logistics                       | ​ | ​ | ​ | ​ | 1,254,000   | ​    | ​ | ​ | ​          | ​ | 726,000 | ​ | ​ | ​ | ​ | ​ | 0.50% | ​ | ​ |

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| ​                  | ​ | ​ | Cost    | ​ | ​     | Fair Value | ​ | ​ | % ofNetAssets* | ​ |
|--------------------------|---------|---------|---------|---------|-------------|------------|---------|---------|----------------|---------|
| Industrial Manufacturing | ​ | ​ | ​ | ​ | 500,000     | ​    | ​ | ​ | ​        | ​ | 666,047 | ​ | ​ | ​ | ​ | ​ | 0.46% | ​ | ​ |
| Education                | ​ | ​ | ​ | ​ | 5,695,988   | ​    | ​ | ​ | ​        | ​ | — | ​ | ​ | ​ | ​ | ​ | 0.0% | ​ | ​ |
| Total                    | ​ | ​ | ​ | $       | 253,878,346 | ​    | ​ | ​ | ​        | $       | 234,797,816 | ​ | ​ | ​ | ​ | ​ | 161.04% | ​ | ​ |
| ​                  |
| ​                                        | ​ | ​ | Cost    | ​ | ​     | Fair Value | ​ | ​ | % of Net Assets* | ​ |
|------------------------------------------------|---------|---------|---------|---------|-------------|------------|---------|---------|------------------|---------|
| Investment Type                                | ​ | ​ | ​ | ​ | ​     | ​    | ​ | ​ | ​          | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Senior Secured – First Lien  | ​ | ​ | ​ | $       | 181,664,266 | ​    | ​ | ​ | ​          | $       | 177,340,027 | ​ | ​ | ​ | ​ | ​ | 112.44% | ​ | ​ |
| Senior Subordinated                            | ​ | ​ | ​ | ​ | 81,397,386  | ​    | ​ | ​ | ​          | ​ | 66,884,849 | ​ | ​ | ​ | ​ | ​ | 42.41% | ​ | ​ |
| Equity/Other                                   | ​ | ​ | ​ | ​ | 45,824,064  | ​    | ​ | ​ | ​          | ​ | 29,125,978 | ​ | ​ | ​ | ​ | ​ | 18.47% | ​ | ​ |
| Senior Secured – Second Lien | ​ | ​ | ​ | ​ | 24,330,818  | ​    | ​ | ​ | ​          | ​ | 14,203,691 | ​ | ​ | ​ | ​ | ​ | 9.01% | ​ | ​ |
| Total                                          | ​ | ​ | ​ | $       | 333,216,534 | ​    | ​ | ​ | ​          | $       | 287,554,545 | ​ | ​ | ​ | ​ | ​ | 182.33% | ​ | ​ |
| Geographic Region†                       | ​ | ​ | ​ | ​ | ​     | ​    | ​ | ​ | ​          | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Southeast                                      | ​ | ​ | ​ | $       | 99,474,605  | ​    | ​ | ​ | ​          | $       | 78,667,734 | ​ | ​ | ​ | ​ | ​ | 49.88% | ​ | ​ |
| Northeast                                      | ​ | ​ | ​ | ​ | 57,107,756  | ​    | ​ | ​ | ​          | ​ | 54,446,210 | ​ | ​ | ​ | ​ | ​ | 34.52% | ​ | ​ |
| West                                           | ​ | ​ | ​ | ​ | 57,327,891  | ​    | ​ | ​ | ​          | ​ | 49,593,273 | ​ | ​ | ​ | ​ | ​ | 31.45% | ​ | ​ |
| South                                          | ​ | ​ | ​ | ​ | 56,444,310  | ​    | ​ | ​ | ​          | ​ | 48,087,167 | ​ | ​ | ​ | ​ | ​ | 30.49% | ​ | ​ |
| Midwest                                        | ​ | ​ | ​ | ​ | 39,883,664  | ​    | ​ | ​ | ​          | ​ | 33,560,162 | ​ | ​ | ​ | ​ | ​ | 21.28% | ​ | ​ |
| Canada                                         | ​ | ​ | ​ | ​ | 22,978,308  | ​    | ​ | ​ | ​          | ​ | 23,199,999 | ​ | ​ | ​ | ​ | ​ | 14.71% | ​ | ​ |
| Total                                          | ​ | ​ | ​ | $       | 333,216,534 | ​    | ​ | ​ | ​          | $       | 287,554,545 | ​ | ​ | ​ | ​ | ​ | 182.33% | ​ | ​ |
| Industry†                                | ​ | ​ | ​ | ​ | ​     | ​    | ​ | ​ | ​          | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Healthcare Services                            | ​ | ​ | ​ | $       | 55,159,796  | ​    | ​ | ​ | ​          | $       | 55,289,718 | ​ | ​ | ​ | ​ | ​ | 35.06% | ​ | ​ |
| Business Services                              | ​ | ​ | ​ | ​ | 51,334,231  | ​    | ​ | ​ | ​          | ​ | 51,724,999 | ​ | ​ | ​ | ​ | ​ | 32.80% | ​ | ​ |
| Industrial Services                            | ​ | ​ | ​ | ​ | 29,762,072  | ​    | ​ | ​ | ​          | ​ | 29,668,447 | ​ | ​ | ​ | ​ | ​ | 18.81% | ​ | ​ |
| Technology & Telecom                       | ​ | ​ | ​ | ​ | 23,951,328  | ​    | ​ | ​ | ​          | ​ | 23,318,694 | ​ | ​ | ​ | ​ | ​ | 14.79% | ​ | ​ |
| Wholesale/Distribution                         | ​ | ​ | ​ | ​ | 19,281,908  | ​    | ​ | ​ | ​          | ​ | 19,684,932 | ​ | ​ | ​ | ​ | ​ | 12.48% | ​ | ​ |
| High Tech Industries                           | ​ | ​ | ​ | ​ | 18,677,481  | ​    | ​ | ​ | ​          | ​ | 18,729,396 | ​ | ​ | ​ | ​ | ​ | 11.88% | ​ | ​ |
| Telecommunications                             | ​ | ​ | ​ | ​ | 15,641,231  | ​    | ​ | ​ | ​          | ​ | 17,677,538 | ​ | ​ | ​ | ​ | ​ | 11.21% | ​ | ​ |
| Retail                                         | ​ | ​ | ​ | ​ | 13,807,599  | ​    | ​ | ​ | ​          | ​ | 14,192,432 | ​ | ​ | ​ | ​ | ​ | 9.00% | ​ | ​ |
| Security                                       | ​ | ​ | ​ | ​ | 15,358,937  | ​    | ​ | ​ | ​          | ​ | 14,135,409 | ​ | ​ | ​ | ​ | ​ | 8.96% | ​ | ​ |
| Oil & Gas Services                         | ​ | ​ | ​ | ​ | 16,193,495  | ​    | ​ | ​ | ​          | ​ | 11,168,822 | ​ | ​ | ​ | ​ | ​ | 7.08% | ​ | ​ |
| Industrial Manufacturing                       | ​ | ​ | ​ | ​ | 8,833,734   | ​    | ​ | ​ | ​          | ​ | 9,219,455 | ​ | ​ | ​ | ​ | ​ | 5.85% | ​ | ​ |
| Environmental/Recycling Services               | ​ | ​ | ​ | ​ | 7,601,167   | ​    | ​ | ​ | ​          | ​ | 7,820,167 | ​ | ​ | ​ | ​ | ​ | 4.96% | ​ | ​ |
| Media: Advertising, Printing & Publishing  | ​ | ​ | ​ | ​ | 12,677,834  | ​    | ​ | ​ | ​          | ​ | 6,678,442 | ​ | ​ | ​ | ​ | ​ | 4.22% | ​ | ​ |
| Transportation Logistics                       | ​ | ​ | ​ | ​ | 7,691,296   | ​    | ​ | ​ | ​          | ​ | 5,474,294 | ​ | ​ | ​ | ​ | ​ | 3.47% | ​ | ​ |
| Waste Services                                 | ​ | ​ | ​ | ​ | 2,529,303   | ​    | ​ | ​ | ​          | ​ | 2,771,797 | ​ | ​ | ​ | ​ | ​ | 1.76% | ​ | ​ |

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| ​                      | ​ | ​ | Cost    | ​ | ​     | Fair Value | ​ | ​ | % ofNetAssets* | ​ |
|------------------------------|---------|---------|---------|---------|-------------|------------|---------|---------|----------------|---------|
| Media & Entertainment    | ​ | ​ | ​ | ​ | 10,355,366  | ​    | ​ | ​ | ​        | ​ | 2 | ​ | ​ | ​ | ​ | ​ | 0.0% | ​ | ​ |
| Education                    | ​ | ​ | ​ | ​ | 15,863,517  | ​    | ​ | ​ | ​        | ​ | 1 | ​ | ​ | ​ | ​ | ​ | 0.0% | ​ | ​ |
| Automotive Business Services | ​ | ​ | ​ | ​ | 8,496,239   | ​    | ​ | ​ | ​        | ​ | — | ​ | ​ | ​ | ​ | ​ | 0.0% | ​ | ​ |
| Total                        | ​ | ​ | ​ | $       | 333,216,534 | ​    | ​ | ​ | ​        | $       | 287,554,545 | ​ | ​ | ​ | ​ | ​ | 182.33% | ​ | ​ |
| ​                      |
| ​                                                                       | ​ | ​ | For the year ended December 31, 2018 | ​ | ​     | For the year ended December 31, 2017 | ​ | ​ | For the year ended December 31, 2016 | ​ | ​     | For the year ended December 31, 2015 | ​ | ​ | For the period from May 8, 2014* through December 31, 2014 | ​ |
|-------------------------------------------------------------------------------|---------|---------|--------------------------------------|---------|-------------|--------------------------------------|---------|---------|--------------------------------------|---------|-------------|--------------------------------------|---------|---------|------------------------------------------------------------|---------|
| Per share data(1)                                                             | ​ | ​ | ​                              | ​ | ​     | ​                              | ​ | ​ | ​                              | ​ | ​     | ​                              | ​ | ​ | ​                                                    | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Net asset value, beginning of period                                          | ​ | ​ | ​                              | $       | 11.09       | ​                              | ​ | ​ | ​                              | $       | 13.72       | ​                              | ​ | ​ | ​                                                    | $       | 14.43 | ​ | ​ | ​ | ​ | $ | 14.87 | ​ | ​ | ​ | ​ | $ | 14.55 | ​ | ​ |
| Net investment income (loss)                                                  | ​ | ​ | ​                              | ​ | 1.01        | ​                              | ​ | ​ | ​                              | ​ | 1.32        | ​                              | ​ | ​ | ​                                                    | ​ | 1.66 | ​ | ​ | ​ | ​ | ​ | 1.43 | ​ | ​ | ​ | ​ | ​ | 0.86 | ​ | ​ |
| Net realized and unrealized gains (losses)(2)                                 | ​ | ​ | ​                              | ​ | (0.28)      | ​                              | ​ | ​ | ​                              | ​ | (2.84)      | ​                              | ​ | ​ | ​                                                    | ​ | (1.06) | ​ | ​ | ​ | ​ | ​ | (0.68) | ​ | ​ | ​ | ​ | ​ | 0.57 | ​ | ​ |
| Benefit (Provision) for income taxes on unrealized gain (loss) on investments | ​ | ​ | ​                              | ​ | 0.03        | ​                              | ​ | ​ | ​                              | ​ | 0.19        | ​                              | ​ | ​ | ​                                                    | ​ | 0.05 | ​ | ​ | ​ | ​ | ​ | 0.17 | ​ | ​ | ​ | ​ | ​ | (0.13) | ​ | ​ |
| Net increase (decrease) in net assets resulting from operations               | ​ | ​ | ​                              | ​ | 0.76        | ​                              | ​ | ​ | ​                              | ​ | (1.33)      | ​                              | ​ | ​ | ​                                                    | ​ | 0.65 | ​ | ​ | ​ | ​ | ​ | 0.92 | ​ | ​ | ​ | ​ | ​ | 1.30 | ​ | ​ |
| Distributions to shareholders:(3)                                             | ​ | ​ | ​                              | ​ | ​     | ​                              | ​ | ​ | ​                              | ​ | ​     | ​                              | ​ | ​ | ​                                                    | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| From net investment income                                                    | ​ | ​ | ​                              | ​ | (0.72)      | ​                              | ​ | ​ | ​                              | ​ | (1.27)      | ​                              | ​ | ​ | ​                                                    | ​ | (1.36) | ​ | ​ | ​ | ​ | ​ | (1.36) | ​ | ​ | ​ | ​ | ​ | (0.86) | ​ | ​ |
| Net realized gains                                                            | ​ | ​ | ​                              | ​ | 0.00        | ​                              | ​ | ​ | ​                              | ​ | (0.03)      | ​                              | ​ | ​ | ​                                                    | ​ | 0.00 | ​ | ​ | ​ | ​ | ​ | 0.00 | ​ | ​ | ​ | ​ | ​ | 0.00 | ​ | ​ |
| Total dividend distributions declared                                         | ​ | ​ | ​                              | ​ | (0.72)      | ​                              | ​ | ​ | ​                              | ​ | (1.30)      | ​                              | ​ | ​ | ​                                                    | ​ | (1.36) | ​ | ​ | ​ | ​ | ​ | (1.36) | ​ | ​ | ​ | ​ | ​ | (0.86) | ​ | ​ |
| Offering costs                                                                | ​ | ​ | ​                              | ​ | 0.00        | ​                              | ​ | ​ | ​                              | ​ | 0.00        | ​                              | ​ | ​ | ​                                                    | ​ | 0.00 | ​ | ​ | ​ | ​ | ​ | 0.00 | ​ | ​ | ​ | ​ | ​ | (0.12) | ​ | ​ |
| Net asset value, end of period                                                | ​ | ​ | ​                              | $       | 11.13       | ​                              | ​ | ​ | ​                              | $       | 11.09       | ​                              | ​ | ​ | ​                                                    | $       | 13.72 | ​ | ​ | ​ | ​ | $ | 14.43 | ​ | ​ | ​ | ​ | $ | 14.87 | ​ | ​ |
| Market value per share, end of period                                         | ​ | ​ | ​                              | $       | 6.47        | ​                              | ​ | ​ | ​                              | $       | 8.39        | ​                              | ​ | ​ | ​                                                    | $       | 11.97 | ​ | ​ | ​ | ​ | $ | 11.60 | ​ | ​ | ​ | ​ | $ | 12.50 | ​ | ​ |
| Total return based on net asset value(4)                                      | ​ | ​ | ​                              | ​ | 6.8%        | ​                              | ​ | ​ | ​                              | ​ | (9.7)%      | ​                              | ​ | ​ | ​                                                    | ​ | 4.5% | ​ | ​ | ​ | ​ | ​ | 6.2% | ​ | ​ | ​ | ​ | ​ | 4.9%(5)(6) | ​ | ​ |
| Total return based on market value(4)                                         | ​ | ​ | ​                              | ​ | (14.3)%     | ​                              | ​ | ​ | ​                              | ​ | (19.0)%     | ​                              | ​ | ​ | ​                                                    | ​ | 14.9% | ​ | ​ | ​ | ​ | ​ | 3.7% | ​ | ​ | ​ | ​ | ​ | (10.9)%(5)(6) | ​ | ​ |
| Shares outstanding at end of period                                           | ​ | ​ | ​                              | ​ | 13,105,295  | ​                              | ​ | ​ | ​                              | ​ | 14,222,945  | ​                              | ​ | ​ | ​                                                    | ​ | 13,451,633 | ​ | ​ | ​ | ​ | ​ | 13,516,766 | ​ | ​ | ​ | ​ | ​ | 13,516,766 | ​ | ​ |
| Ratio/Supplemental Data:                                                      | ​ | ​ | ​                              | ​ | ​     | ​                              | ​ | ​ | ​                              | ​ | ​     | ​                              | ​ | ​ | ​                                                    | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Net assets, at end of period                                                  | ​ | ​ | ​                              | $       | 145,802,532 | ​                              | ​ | ​ | ​                              | $       | 157,714,175 | ​                              | ​ | ​ | ​                                                    | $       | 184,524,591 | ​ | ​ | ​ | ​ | $ | 195,032,211 | ​ | ​ | ​ | ​ | $ | 200,989,308 | ​ | ​ |
| Ratio of total expenses before waiver to average net assets                   | ​ | ​ | ​                              | ​ | 10.18%(7)   | ​                              | ​ | ​ | ​                              | ​ | 9.31%       | ​                              | ​ | ​ | ​                                                    | ​ | 9.58% | ​ | ​ | ​ | ​ | ​ | 7.79% | ​ | ​ | ​ | ​ | ​ | 5.12%(7) | ​ | ​ |
| Ratio of interest expenses to average net assets                              | ​ | ​ | ​                              | ​ | 4.73%       | ​                              | ​ | ​ | ​                              | ​ | 4.18%       | ​                              | ​ | ​ | ​                                                    | ​ | 3.59% | ​ | ​ | ​ | ​ | ​ | 2.50% | ​ | ​ | ​ | ​ | ​ | 1.04%(7) | ​ | ​ |
| Ratio of incentive fees to average net assets                                 | ​ | ​ | ​                              | ​ | (0.27)%     | ​                              | ​ | ​ | ​                              | ​ | 0.36%       | ​                              | ​ | ​ | ​                                                    | ​ | 1.71% | ​ | ​ | ​ | ​ | ​ | 1.63% | ​ | ​ | ​ | ​ | ​ | 0.75%(7) | ​ | ​ |
| Ratio of waiver of management and incentive fees to average net assets        | ​ | ​ | ​                              | ​ | 0.28%       | ​                              | ​ | ​ | ​                              | ​ | 0.76%       | ​                              | ​ | ​ | ​                                                    | ​ | —% | ​ | ​ | ​ | ​ | ​ | 0.50% | ​ | ​ | ​ | ​ | ​ | 1.57%(7) | ​ | ​ |

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| ​                                                                   | ​ | ​ | For the yearendedDecember 31,2018 | ​ | ​    | For the yearendedDecember 31,2017 | ​ | ​ | For the yearendedDecember 31,2016 | ​ | ​    | For the yearendedDecember 31,2015 | ​ | ​ | For the period fromMay 8, 2014* throughDecember 31,2014 | ​ |
|---------------------------------------------------------------------------|---------|---------|-----------------------------------|---------|------------|-----------------------------------|---------|---------|-----------------------------------|---------|------------|-----------------------------------|---------|---------|---------------------------------------------------------|---------|
| Ratio of net expenses to average net assets                               | ​ | ​ | ​                           | ​ | 9.90%      | ​                           | ​ | ​ | ​                           | ​ | 8.55%      | ​                           | ​ | ​ | ​                                                 | ​ | 9.58% | ​ | ​ | ​ | ​ | ​ | 7.29% | ​ | ​ | ​ | ​ | ​ | 3.55%(7) | ​ | ​ |
| Ratio of net investment income (loss) before waiver to average net assets | ​ | ​ | ​                           | ​ | 8.88%      | ​                           | ​ | ​ | ​                           | ​ | 9.67%      | ​                           | ​ | ​ | ​                                                 | ​ | 11.80% | ​ | ​ | ​ | ​ | ​ | 9.13% | ​ | ​ | ​ | ​ | ​ | 7.45%(7) | ​ | ​ |
| Ratio of net investment income (loss) after waiver to average net assets  | ​ | ​ | ​                           | ​ | 8.60%      | ​                           | ​ | ​ | ​                           | ​ | 10.43%     | ​                           | ​ | ​ | ​                                                 | ​ | 11.80% | ​ | ​ | ​ | ​ | ​ | 9.63% | ​ | ​ | ​ | ​ | ​ | 9.02%(7) | ​ | ​ |
| Total Credit Facility payable outstanding                                 | ​ | ​ | ​                           | $       | 28,536,441 | ​                           | ​ | ​ | ​                           | $       | 89,703,273 | ​                           | ​ | ​ | ​                                                 | $       | 39,133,273 | ​ | ​ | ​ | ​ | $ | 63,504,738 | ​ | ​ | ​ | ​ | $ | 62,499,154 | ​ | ​ |
| Total Notes payable outstanding                                           | ​ | ​ | ​                           | $       | 55,000,000 | ​                           | ​ | ​ | ​                           | $       | 55,000,000 | ​                           | ​ | ​ | ​                                                 | $       | 55,000,000 | ​ | ​ | ​ | ​ | $ | 40,000,000 | ​ | ​ | ​ | ​ | $ | — | ​ | ​ |
| Asset coverage ratio(8)                                                   | ​ | ​ | ​                           | ​ | 2.7        | ​                           | ​ | ​ | ​                           | ​ | 2.1        | ​                           | ​ | ​ | ​                                                 | ​ | 3.0 | ​ | ​ | ​ | ​ | ​ | 2.9 | ​ | ​ | ​ | ​ | ​ | 4.2 | ​ | ​ |
| Portfolio turnover rate                                                   | ​ | ​ | ​                           | ​ | 41%        | ​                           | ​ | ​ | ​                           | ​ | 32%        | ​                           | ​ | ​ | ​                                                 | ​ | 51% | ​ | ​ | ​ | ​ | ​ | 24% | ​ | ​ | ​ | ​ | ​ | 20%(5) | ​ | ​ |
| ​ | Tax Cost                               | ​ | ​ | ​ | $       | 253,878,346  | ​ | ​ |
|---------|----------------------------------------|---------|---------|---------|---------|--------------|---------|---------|
| ​ | Gross unrealized appreciation          | ​ | ​ | ​ | ​ | 79,553,373   | ​ | ​ |
| ​ | Gross unrealized depreciation          | ​ | ​ | ​ | ​ | (98,633,903) | ​ | ​ |
| ​ | Net unrealized investment depreciation | ​ | ​ | ​ | $       | (19,080,530) | ​ | ​ |
| ​ |

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| ​ | Tax Cost                               | ​ | ​ | ​ | $       | 333,216,534  | ​ | ​ |
|---------|----------------------------------------|---------|---------|---------|---------|--------------|---------|---------|
| ​ | Gross unrealized appreciation          | ​ | ​ | ​ | ​ | 5,655,729    | ​ | ​ |
| ​ | Gross unrealized depreciation          | ​ | ​ | ​ | ​ | (51,317,718) | ​ | ​ |
| ​ | Net unrealized investment depreciation | ​ | ​ | ​ | $       | (45,661,989) | ​ | ​ |
| ​ |
| Balance Sheet          | ​ | ​ | As of December 31, 2018 | ​ | ​    | Income Statement | ​ | ​ | For the year ended December 31, 2018 | ​ |
|------------------------|---------|---------|-------------------------|---------|------------|------------------|---------|---------|--------------------------------------|---------|
| Current Assets         | ​ | ​ | ​                 | $       | 15,536,556 | ​          | ​ | ​ | Net Sales                            | ​ | ​ | ​ | $ | 50,355,783 | ​ | ​ |
| Noncurrent Assets      | ​ | ​ | ​                 | ​ | 64,090,276 | ​          | ​ | ​ | Gross Profit                         | ​ | ​ | ​ | ​ | 12,732,260 | ​ | ​ |
| Current Liabilities    | ​ | ​ | ​                 | ​ | 10,838,139 | ​          | ​ | ​ | Net Income/EBITDA                    | ​ | ​ | ​ | ​ | 7,318,579 | ​ | ​ |
| Noncurrent Liabilities | ​ | ​ | ​                 | ​ | 32,322,997 | ​          | ​ | ​ | ​                              | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
| Balance Sheet          | ​ | ​ | As of December 31, 2017 | ​ | ​    | Income Statement | ​ | ​ | For the year ended December 31, 2017 | ​ |
|------------------------|---------|---------|-------------------------|---------|------------|------------------|---------|---------|--------------------------------------|---------|
| Current Assets         | ​ | ​ | ​                 | $       | 6,276,379  | ​          | ​ | ​ | Net Sales                            | ​ | ​ | ​ | $ | 19,716,632 | ​ | ​ |
| Noncurrent Assets      | ​ | ​ | ​                 | ​ | 18,281,690 | ​          | ​ | ​ | Gross Profit                         | ​ | ​ | ​ | ​ | 6,534,303 | ​ | ​ |
| Current Liabilities    | ​ | ​ | ​                 | ​ | 1,022,247  | ​          | ​ | ​ | Net Income/EBITDA                    | ​ | ​ | ​ | ​ | 3,339,407 | ​ | ​ |
| Noncurrent Liabilities | ​ | ​ | ​                 | ​ | 14,003,599 | ​          | ​ | ​ | ​                              | ​ | ​ | ​ | ​ | ​ | ​ | ​ |

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| ​                                                         | ​ | ​ | 2018                              | ​ |
|-----------------------------------------------------------------|---------|---------|-----------------------------------|---------|
| ​                                                         | ​ | ​ | For the quarter ended December 31 | ​ | ​ | For the quarter ended September 30 | ​ | ​ | For the quarter ended June 30 | ​ | ​ | For the quarter ended March 31 | ​ |
| Total investment income                                         | ​ | ​ | ​                           | $       | 6,979,385 | ​ | ​ | ​ | ​ | $ | 6,553,080 | ​ | ​ | ​ | ​ | $ | 7,253,950 | ​ | ​ | ​ | ​ | $ | 8,181,565 | ​ | ​ |
| Total investment income per common share                        | ​ | ​ | ​                           | ​ | 0.52 | ​ | ​ | ​ | ​ | ​ | 0.48 | ​ | ​ | ​ | ​ | ​ | 0.53 | ​ | ​ | ​ | ​ | ​ | 0.58 | ​ | ​ |
| Net investment income                                           | ​ | ​ | ​                           | ​ | 3,690,986 | ​ | ​ | ​ | ​ | ​ | 2,965,656 | ​ | ​ | ​ | ​ | ​ | 3,483,588 | ​ | ​ | ​ | ​ | ​ | 3,776,160 | ​ | ​ |
| Net investment income per common share                          | ​ | ​ | ​                           | ​ | 0.27 | ​ | ​ | ​ | ​ | ​ | 0.22 | ​ | ​ | ​ | ​ | ​ | 0.25 | ​ | ​ | ​ | ​ | ​ | 0.27 | ​ | ​ |
| Net realized and unrealized gain (loss)                         | ​ | ​ | ​                           | ​ | (2,550,805) | ​ | ​ | ​ | ​ | ​ | 116,346 | ​ | ​ | ​ | ​ | ​ | (5,722,599) | ​ | ​ | ​ | ​ | ​ | (237,200) | ​ | ​ |
| Net realized and unrealized (loss) gain per common share        | ​ | ​ | ​                           | ​ | (0.19) | ​ | ​ | ​ | ​ | ​ | 0.01 | ​ | ​ | ​ | ​ | ​ | (0.42) | ​ | ​ | ​ | ​ | ​ | (0.02) | ​ | ​ |
| Net increase (decrease) in net assets resulting from operations | ​ | ​ | ​                           | ​ | 1,140,181 | ​ | ​ | ​ | ​ | ​ | 3,082,002 | ​ | ​ | ​ | ​ | ​ | (2,239,011) | ​ | ​ | ​ | ​ | ​ | 3,538,960 | ​ | ​ |
| Basic and diluted earnings per common share                     | ​ | ​ | ​                           | ​ | 0.08 | ​ | ​ | ​ | ​ | ​ | 0.23 | ​ | ​ | ​ | ​ | ​ | (0.16) | ​ | ​ | ​ | ​ | ​ | 0.25 | ​ | ​ |
| Net asset value per common share at the end of quarter          | ​ | ​ | ​                           | ​ | 11.13 | ​ | ​ | ​ | ​ | ​ | 11.08 | ​ | ​ | ​ | ​ | ​ | 11.01 | ​ | ​ | ​ | ​ | ​ | 11.22 | ​ | ​ |
| ​                                                         | ​ | ​ | 2017                           | ​ |
|-----------------------------------------------------------------|---------|---------|--------------------------------|---------|
| ​                                                         | ​ | ​ | For thequarterendedDecember 31 | ​ | ​ | For thequarterendedSeptember 30 | ​ | ​ | For thequarterendedJune 30 | ​ | ​ | For the quarterendedMarch 31 | ​ |
| Total investment income                                         | ​ | ​ | ​                        | $       | 8,201,431 | ​ | ​ | ​ | ​ | $ | 7,610,521 | ​ | ​ | ​ | ​ | $ | 8,338,109 | ​ | ​ | ​ | ​ | $ | 9,201,448 | ​ | ​ |
| Total investment income per common share                        | ​ | ​ | ​                        | ​ | 0.58 | ​ | ​ | ​ | ​ | ​ | 0.53 | ​ | ​ | ​ | ​ | ​ | 0.61 | ​ | ​ | ​ | ​ | ​ | 0.68 | ​ | ​ |
| Net investment income                                           | ​ | ​ | ​                        | ​ | 4,044,773 | ​ | ​ | ​ | ​ | ​ | 4,843,375 | ​ | ​ | ​ | ​ | ​ | 4,843,375 | ​ | ​ | ​ | ​ | ​ | 4,592,616 | ​ | ​ |
| Net investment income per common share                          | ​ | ​ | ​                        | ​ | 0.28 | ​ | ​ | ​ | ​ | ​ | 0.34 | ​ | ​ | ​ | ​ | ​ | 0.36 | ​ | ​ | ​ | ​ | ​ | 0.34 | ​ | ​ |
| Net realized and unrealized (loss) gain                         | ​ | ​ | ​                        | ​ | (17,413,043) | ​ | ​ | ​ | ​ | ​ | (6,454,859) | ​ | ​ | ​ | ​ | ​ | (9,996,441) | ​ | ​ | ​ | ​ | ​ | (3,561,538) | ​ | ​ |
| Net realized and unrealized (loss) gain per common share        | ​ | ​ | ​                        | ​ | (1.25) | ​ | ​ | ​ | ​ | ​ | (0.45) | ​ | ​ | ​ | ​ | ​ | (0.73) | ​ | ​ | ​ | ​ | ​ | (0.26) | ​ | ​ |
| Net (decrease) increase in net assets resulting from operations | ​ | ​ | ​                        | ​ | (13,368,270) | ​ | ​ | ​ | ​ | ​ | (1,611,484) | ​ | ​ | ​ | ​ | ​ | (5,153,066) | ​ | ​ | ​ | ​ | ​ | 1,031,078 | ​ | ​ |
| Basic and diluted earnings per common share                     | ​ | ​ | ​                        | ​ | (0.96) | ​ | ​ | ​ | ​ | ​ | (0.11) | ​ | ​ | ​ | ​ | ​ | (0.38) | ​ | ​ | ​ | ​ | ​ | 0.08 | ​ | ​ |
| Net asset value per common share at the end of quarter          | ​ | ​ | ​                        | ​ | 11.09 | ​ | ​ | ​ | ​ | ​ | 12.27 | ​ | ​ | ​ | ​ | ​ | 12.73 | ​ | ​ | ​ | ​ | ​ | 13.43 | ​ | ​ |
| ​                                                  | ​ | ​ | 2016                           | ​ |
|----------------------------------------------------------|---------|---------|--------------------------------|---------|
| ​                                                  | ​ | ​ | For thequarterendedDecember 31 | ​ | ​ | For thequarterendedSeptember 30 | ​ | ​ | For thequarterendedJune 30 | ​ | ​ | For the quarterendedMarch 31 | ​ |
| Total investment income                                  | ​ | ​ | ​                        | $       | 10,899,771 | ​ | ​ | ​ | ​ | $ | 9,116,468 | ​ | ​ | ​ | ​ | $ | 10,639,969 | ​ | ​ | ​ | ​ | $ | 9,946,391 | ​ | ​ |
| Total investment income per common share                 | ​ | ​ | ​                        | ​ | 0.81 | ​ | ​ | ​ | ​ | ​ | 0.68 | ​ | ​ | ​ | ​ | ​ | 0.79 | ​ | ​ | ​ | ​ | ​ | 0.74 | ​ | ​ |
| Net investment income                                    | ​ | ​ | ​                        | ​ | 6,119,155 | ​ | ​ | ​ | ​ | ​ | 4,786,793 | ​ | ​ | ​ | ​ | ​ | 5,898,346 | ​ | ​ | ​ | ​ | ​ | 5,604,892 | ​ | ​ |
| Net investment income per common share                   | ​ | ​ | ​                        | ​ | 0.45 | ​ | ​ | ​ | ​ | ​ | 0.35 | ​ | ​ | ​ | ​ | ​ | 0.44 | ​ | ​ | ​ | ​ | ​ | 0.41 | ​ | ​ |
| Net realized and unrealized (loss) gain                  | ​ | ​ | ​                        | ​ | (1,195,769) | ​ | ​ | ​ | ​ | ​ | (6,629,320) | ​ | ​ | ​ | ​ | ​ | (4,503,177) | ​ | ​ | ​ | ​ | ​ | (1,291,134) | ​ | ​ |
| Net realized and unrealized (loss) gain per common share | ​ | ​ | ​                        | ​ | (0.09) | ​ | ​ | ​ | ​ | ​ | (0.49) | ​ | ​ | ​ | ​ | ​ | (0.33) | ​ | ​ | ​ | ​ | ​ | (0.10) | ​ | ​ |

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| ​                                                         | ​ | ​ | 2016                           | ​ |
|-----------------------------------------------------------------|---------|---------|--------------------------------|---------|
| ​                                                         | ​ | ​ | For thequarterendedDecember 31 | ​ | ​ | For thequarterendedSeptember 30 | ​ | ​ | For thequarterendedJune 30 | ​ | ​ | For thequarterendedMarch 31 | ​ |
| Net increase (decrease) in net assets resulting from operations | ​ | ​ | ​                        | ​ | 4,923,386 | ​ | ​ | ​ | ​ | ​ | (1,842,527) | ​ | ​ | ​ | ​ | ​ | 1,395,169 | ​ | ​ | ​ | ​ | ​ | 4,313,758 | ​ | ​ |
| Basic and diluted earnings per common share                     | ​ | ​ | ​                        | ​ | 0.37 | ​ | ​ | ​ | ​ | ​ | (0.14) | ​ | ​ | ​ | ​ | ​ | 0.10 | ​ | ​ | ​ | ​ | ​ | 0.32 | ​ | ​ |
| Net asset value per common share at the end of quarter          | ​ | ​ | ​                        | ​ | 13.72 | ​ | ​ | ​ | ​ | ​ | 13.69 | ​ | ​ | ​ | ​ | ​ | 14.16 | ​ | ​ | ​ | ​ | ​ | 14.41 | ​ | ​ |

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| ​ | Report of Independent Registered Public Accounting Firm                                                                                        | ​ | ​ | ​ | ​ | 72 | ​ | ​ |
|---------|------------------------------------------------------------------------------------------------------------------------------------------------|---------|---------|---------|---------|----|---------|---------|
| ​ | Consolidated Statements of Assets and Liabilities as of December 31, 2018 and December 31, 2017                                      | ​ | ​ | ​ | ​ | 73 | ​ | ​ |
| ​ | Consolidated Statements of Operations for the year ended December 31, 2018, December 31, 2017, and December 31, 2016            | ​ | ​ | ​ | ​ | 74 | ​ | ​ |
| ​ | Consolidated Statements of Changes in Net Assets for the year ended December 31, 2018, December 31, 2017, and December 31, 2016 | ​ | ​ | ​ | ​ | 75 | ​ | ​ |
| ​ | Consolidated Statements of Cash Flows for the year ended December 31, 2018, December 31, 2017, and December 31, 2016            | ​ | ​ | ​ | ​ | 76 | ​ | ​ |
| ​ | Consolidated Schedule of Investments as of December 31, 2018 and December 31, 2017                                                   | ​ | ​ | ​ | ​ | 77 | ​ | ​ |
| ​ | Notes to the Consolidated Financial Statements                                                                                                 | ​ | ​ | ​ | ​ | 85 | ​ | ​ |
| ​ |  3.1 | ​ | ​ | Articles of Amendment and Restatement of Alcentra Capital Corporation (the “Registrant”)(1)                                                             | ​ |
|---------|------------|---------|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------|
| ​ | 3.2        | ​ | ​ | Amended and Restated Bylaws(23)                                                                                                                                     | ​ |
| ​ | 4.1        | ​ | ​ | Form of Stock Certificate(4)                                                                                                                                        | ​ |
| ​ | 4.2        | ​ | ​ | Form of Base Indenture(6)                                                                                                                                           | ​ |
| ​ | 4.3        | ​ | ​ | Statement of Eligibility of Trustee on Form T-1(5)                                                                                                                  | ​ |
| ​ | 4.4        | ​ | ​ | Form of Supplemental Indenture(6)                                                                                                                                   | ​ |
| ​ | 4.5        | ​ | ​ | Form of First Supplemental Indenture relating to the Alcentra Capital Internotes® 6.500% Notes due 2022(6)                                                     | ​ |
| ​ | 4.6        | ​ | ​ | Form of Global Note relating to the Alcentra Capital Internotes® 6.500% Notes due 2022 (included as Exhibit A to the Form of First Supplemental Indenture)(6)  | ​ |
| ​ | 4.7        | ​ | ​ | Form of Second Supplemental Indenture relating to the Alcentra Capital Internotes® 6.375% Notes due 2020(7)                                                    | ​ |
| ​ | 4.8        | ​ | ​ | Form of Global Note relating to the Alcentra Capital Internotes® 6.375% Notes due 2020 (included as Exhibit A to the Form of Second Supplemental Indenture)(7) | ​ |
| ​ | 4.9        | ​ | ​ | Form of Third Supplemental Indenture relating to the Alcentra Capital Internotes® 6.375% Notes due 2020(8)                                                     | ​ |
| ​ | 4.10       | ​ | ​ | Form of Global Note relating to the Alcentra Capital Internotes® 6.375% Notes due 2020 (included as Exhibit A to the Form of Third Supplemental Indenture)(8)  | ​ |
| ​ | 4.11       | ​ | ​ | Form of Fourth Supplemental Indenture relating to the Alcentra Capital Internotes® 6.375% Notes due 2020(9)                                                    | ​ |

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| ​ |  4.12 | ​ | ​ | Form of Global Note relating to the Alcentra Capital Internotes® 6.375% Notes due 2020 (included as Exhibit A to the Form of Fourth Supplemental Indenture)(9)      | ​ |
|---------|-------------|---------|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------|
| ​ | 4.13        | ​ | ​ | Form of Fifth Supplemental Indenture relating to the Alcentra Capital Internotes® 6.375% Notes due 2020(10)                                                         | ​ |
| ​ | 4.14        | ​ | ​ | Form of Global Note relating to the Alcentra Capital Internotes® 6.375% Notes due 2020 (included as Exhibit A to the Form of Fifth Supplemental Indenture)(10)      | ​ |
| ​ | 4.15        | ​ | ​ | Form of Sixth Supplemental Indenture relating to the Alcentra Capital Internotes® 6.375% Notes due 2020(11)                                                         | ​ |
| ​ | 4.16        | ​ | ​ | Form of Global Note relating to the Alcentra Capital Internotes® 6.375% Notes due 2020 (included as Exhibit A to the Form of Sixth Supplemental Indenture)(12)      | ​ |
| ​ | 4.17        | ​ | ​ | Form of Seventh Supplemental Indenture relating to the Alcentra Capital Internotes® 6.750% Notes due 2022(11)                                                       | ​ |
| ​ | 4.18        | ​ | ​ | Form of Global Note relating to the Alcentra Capital Internotes® 6.750% Notes due 2022 (included as Exhibit A to the Form of Seventh Supplemental Indenture(11)     | ​ |
| ​ | 4.19        | ​ | ​ | Form of Eighth Supplemental Indenture relating to the Alcentra Capital Internotes® 6.25% Notes due 2020(12)                                                         | ​ |
| ​ | 4.20        | ​ | ​ | Form of Global Note relating to the Alcentra Capital Internotes® 6.25% Notes due 2020 (included as Exhibit A to the Form of Eighth Supplemental Indenture)(12)      | ​ |
| ​ | 4.21        | ​ | ​ | Form of Ninth Supplemental Indenture relating to the Alcentra Capital Internotes® 6.50% Notes due 2020(12)                                                          | ​ |
| ​ | 4.22        | ​ | ​ | Form of Global Note relating to the Alcentra Capital Internotes® 6.50% Notes due 2020 (included as Exhibit A to the Form of Ninth Supplemental Indenture)(12)       | ​ |
| ​ | 4.23        | ​ | ​ | Form of Tenth Supplemental Indenture relating to the Alcentra Capital Internotes® 6.50% Notes due 2021(14)                                                          | ​ |
| ​ | 4.24        | ​ | ​ | Form of Global Note relating to the Alcentra Capital Internotes® 6.50% Notes due 2021 (included as Exhibit A to the Form of Tenth Supplemental Indenture)(14)       | ​ |
| ​ | 4.25        | ​ | ​ | Form of Eleventh Supplemental Indenture relating to the Alcentra Capital Internotes® 6.50% Notes due 2021(15)                                                       | ​ |
| ​ | 4.26        | ​ | ​ | Form of Global Note relating to the Alcentra Capital Internotes® 6.50% Notes due 2021 (included as Exhibit A to the Form of Eleventh Supplemental Indenture)(15)    | ​ |
| ​ | 4.27        | ​ | ​ | Form of Twelfth Supplemental Indenture relating to the Alcentra Capital Internotes® 6.50% Notes due 2021(16)                                                        | ​ |
| ​ | 4.28        | ​ | ​ | Form of Global Note relating to the Alcentra Capital Internotes® 6.50% Notes due 2021 (included as Exhibit A to the Form of Twelfth Supplemental Indenture)(16)     | ​ |
| ​ | 4.29        | ​ | ​ | Form of Thirteenth Supplemental Indenture relating to the Alcentra Capital Internotes® 6.375% Notes due 2021(17)                                                    | ​ |
| ​ | 4.30        | ​ | ​ | Form of Global Note relating to the Alcentra Capital Internotes® 6.375% Notes due 2021 (included as Exhibit A to the Form of Thirteenth Supplemental Indenture)(17) | ​ |
| ​ | 4.31        | ​ | ​ | Form of Fourteenth Supplemental Indenture relating to the Alcentra Capital Internotes® 6.375% Notes due 2021(18)                                                    | ​ |
| ​ | 4.32        | ​ | ​ | Form of Global Note relating to the Alcentra Capital Internotes® 6.375% Notes due 2021 (included as Exhibit A to the Form of Fourteenth Supplemental Indenture)(18) | ​ |
| ​ | 4.33        | ​ | ​ | Form of Fifteenth Supplemental Indenture relating to the Alcentra Capital Internotes® 6.375% Notes due 2021(19)                                                     | ​ |
| ​ | 4.34        | ​ | ​ | Form of Global Note relating to the Alcentra Capital Internotes® 6.375% Notes due 2021 (included as Exhibit A to the Form of Fifteenth Supplemental Indenture)(19)  | ​ |

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| ​ |  4.35 | ​ | ​ | Form of Sixteenth Supplemental Indenture relating to the Alcentra Capital® Internotes 6.375% Notes due 2021(20)                                                                                                                                                                                                                                                          | ​ |
|---------|-------------|---------|---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------|
| ​ | 4.36        | ​ | ​ | Form of Global Note relating to the Alcentra Capital Internotes® 6.375% Notes due 2021 (included as Exhibit A to the Form of Sixteenth Supplemental Indenture)(20)                                                                                                                                                                                                       | ​ |
| ​ | 4.37        | ​ | ​ | Form of Seventeenth Supplemental Indenture relating to the Alcentra Capital® Internotes 6.25% Notes due 2021(21)                                                                                                                                                                                                                                                         | ​ |
| ​ | 4.38        | ​ | ​ | Form of Global Note relating to the Alcentra Capital Internotes® 6.25% Notes due 2021 (included as Exhibit A to the Form of Seventeenth Supplemental Indenture)(21)                                                                                                                                                                                                      | ​ |
| ​ | 4.39        | ​ | ​ | Form of Eighteenth Supplemental Indenture relating to the Alcentra Capital® Internotes 6.25% Notes due 2021(22)                                                                                                                                                                                                                                                          | ​ |
| ​ | 4.40        | ​ | ​ | Form of Global Note relating to the Alcentra Capital Internotes® 6.25% Notes due 2021 (included as Exhibit A to the Form of Eighteenth Supplemental Indenture)(22)                                                                                                                                                                                                       | ​ |
| ​ | 4.41        | ​ | ​ | Form of Warrant Certificate and Warrant Agreement(13)                                                                                                                                                                                                                                                                                                                         | ​ |
| ​ | 4.42        | ​ | ​ | Form of Articles Supplementary Establishing and Fixing the Rights and Preferences of Preferred Stock(13)                                                                                                                                                                                                                                                                      | ​ |
| ​ | 10.1        | ​ | ​ | Form of Dividend Reinvestment Plan(3)                                                                                                                                                                                                                                                                                                                                         | ​ |
| ​ | 10.2        | ​ | ​ | Amended and Restated Investment Advisory Agreement, dated as of May 4, 2018 by and between the Registrant and Alcentra NY, LLC(24)                                                                                                                                                                                                                                            | ​ |
| ​ | 10.3        | ​ | ​ | Fee Waiver Letter, dated as of May 4, 2018 by and between the Registrant and Alcentra NY, LLC(24)                                                                                                                                                                                                                                                                             | ​ |
| ​ | 10.4        | ​ | ​ | Form of Letter Agreement between the Registrant and Alcentra NY, LLC(3)                                                                                                                                                                                                                                                                                                       | ​ |
| ​ | 10.5        | ​ | ​ | Form of Custodian Agreement between the Registrant and State Street Bank and Trust Company(4)                                                                                                                                                                                                                                                                                 | ​ |
| ​ | 10.6        | ​ | ​ | Form of Master Administration and Accounting Agreement between the Registrant and State Street Bank and Trust Company(4)                                                                                                                                                                                                                                                      | ​ |
| ​ | 10.7        | ​ | ​ | Form of License Agreement between the Registrant and Alcentra NY, LLC(2)                                                                                                                                                                                                                                                                                                      | ​ |
| ​ | 10.8        | ​ | ​ | Form of Registration Rights Agreement between the Registrant and BNY Mellon-Alcentra Mezzanine III, L.P.(2)                                                                                                                                                                                                                                                                   | ​ |
| ​ | 10.9        | ​ | ​ | Amended and Restated Senior Secured Revolving Credit Agreement, dated as of September 21, 2018 by and among the Company, as borrower, the Lenders party thereto and ING Capital LLC, as Administrative Agent, Arranger and Bookrunner(25)                                                                                                                                     | ​ |
| ​ | 10.10       | ​ | ​ | Amended and Restated Guarantee, Pledge and Security Agreement, dated as of September 21, 2018 by and among the Company, as borrower, the Subsidiary Guarantors party thereto, ING Capital LLC, as Revolving Administrative Agent for the Revolving Lenders, each Financing Agent and Designated Indebtedness Holder party hereto, and ING Capital LLC as Collateral Agent(25) | ​ |
| ​ | 10.11       | ​ | ​ | Form of Selling Agent Agreement, by and among Alcentra Capital Corporation, Alcentra NY, LLC and Incapital LLC(6)                                                                                                                                                                                                                                                             | ​ |
| ​ | 10.12       | ​ | ​ | Form of Indemnification Agreement(23)                                                                                                                                                                                                                                                                                                                                         | ​ |
| ​ | 21.1        | ​ | ​ | Subsidiaries of the Registrant: Alcentra BDC Equity Holdings, LLC — Delaware                                                                                                                                                                                                                                                                                            | ​ |
| ​ | 31.1        | ​ | ​ | Certification of Chief Executive Officer Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934*                                                                                                                                                                                                                                                                | ​ |
| ​ | 31.2        | ​ | ​ | Certification of Chief Financial Officer Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934*                                                                                                                                                                                                                                                                | ​ |
| ​ | 32.1        | ​ | ​ | Certification of Chief Executive Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350)*                                                                                                                                                                                                                                                          | ​ |

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| ​ |  32.2 | ​ | ​ | Certification of Chief Financial Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. 1350)* | ​ |
|---------|-------------|---------|---------|----------------------------------------------------------------------------------------------------------------------|---------|

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| ​ | ​                   | ​ | ​ | ALCENTRA CAPITAL CORPORATION                                               | ​ |
|---------|---------------------------|---------|---------|----------------------------------------------------------------------------|---------|
| ​ | Date: March 11, 2019 | ​ | ​ | /s/ Vijay Rajguru​Name: Vijay Rajguru Title: Chief Executive Officer | ​ |
| ​ | Date: March 11, 2019 | ​ | ​ | /s/ Vijay Rajguru​Name: Vijay Rajguru Chief Executive Officer, (Principal Executive Officer) and Chairman                                                  | ​ |
|---------|---------------------------|---------|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------|
| ​ | Date: March 11, 2019 | ​ | ​ | /s/ Ellida McMillan​Ellida McMillan Chief Financial Officer, Chief Operating Officer, Treasurer and Secretary (Principal Financial and Accounting Officer) | ​ |
| ​ | Date: March 11, 2019 | ​ | ​ | /s/ Frederick Van Zijl​Frederick Van Zijl Director                                                                                                         | ​ |
| ​ | Date: March 11, 2019 | ​ | ​ | /s/ Douglas J. Greenlaw​Douglas J. Greenlaw Director                                                                                                       | ​ |
| ​ | Date: March 11, 2019 | ​ | ​ | /s/ Edward Grebow​Edward Grebow Director                                                                                                                   | ​ |
| ​ | Date: March 11, 2019 | ​ | ​ | /s/ William H. Wright II​William H. Wright II Director                                                                                                     | ​ |

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