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Consolidated Statements of Assets and Liabilities (Parenthetical) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Investments, cost | $ 3,094,186 | [1] | $ 3,038,208 | [2]
Securities purchased under collateralized agreements to resell, cost | 30,000 |  | 30,000 |
Deferred financing costs, accumulated amortization | $ 56,248 |  | $ 54,263 |
Preferred stock, par value (in dollars per share) | $ 0.01 |  | $ 0.01 |
Preferred stock, authorized (in shares) | 2,000,000 |  | 2,000,000 |
Preferred stock, issued (in shares) | 0 |  | 0 |
Common stock, par value (in dollars per share) | $ 0.01 |  | $ 0.01 |
Common stock, authorized (in shares) | 200,000,000 |  | 200,000,000 |
Common stock, issued (in shares) | 106,289,293 |  | 102,558,859 |
Common stock, outstanding (in shares) | 106,289,293 |  | 102,558,859 |
Non-controlled/Non-affiliated |  |  |  |
Investments, cost | $ 2,330,396 |  | $ 2,283,490 |
Non-controlled/Affiliated |  |  |  |
Investments, cost | 109,980 |  | 107,895 |
Controlled |  |  |  |
Investments, cost | $ 653,810 |  | $ 646,823 |
[1] | New Mountain Finance Corporation (the "Company") generally acquires its investments in private transactions exempt from registration under the Securities Act of 1933, as amended (the "Securities Act"). These investments are generally subject to certain limitations on resale, and may be deemed to be "restricted securities" under the Securities Act.
[2] | New Mountain Finance Corporation (the "Company") generally acquires its investments in private transactions exempt from registration under the Securities Act of 1933, as amended (the "Securities Act"). These investments are generally subject to certain limitations on resale, and may be deemed to be "restricted securities" under the Securities Act.

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