Form 4 for NMFC New Mountain Finance Corp

Accepted 2026-03-12 00:00:00 ET · period of report 2026-03-10 · accession 0001580642-26-001781 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
MI	2026-03-12	2026-03-10+	NMFC	KLINSKY STEVEN B	Dir, 10%	P - Purchase	$8.05	+500.0K	1.37M	+57%	+$4.03M

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2026-03-10	P	A	149,172	$8.05	5,186,696	I See Note	—	—	(F8) The Steven B. Klinsky 2024 Revocable Trust ("2024 Trust 1") directly owns these shares. The reporting person disclaims beneficial ownership held by 2024 Trust 1 except to the extent of his pecuniary interest therein.
2	Common	Common Stock	2026-03-11	P	A	184,162	$8.05	5,370,858	I See Note	—	—	(F8) The Steven B. Klinsky 2024 Revocable Trust ("2024 Trust 1") directly owns these shares. The reporting person disclaims beneficial ownership held by 2024 Trust 1 except to the extent of his pecuniary interest therein.
3	Common	Common Stock	2026-03-11	P	A	92,080	$8.05	1,465,110	I See Note	—	—	(F2) The Steven B. Klinsky 2008 Long Term Trust directly owns these shares. The reporting person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.
4	Common	Common Stock	2026-03-10	P	A	74,586	$8.05	1,373,030	I See Note	—	—	(F2) The Steven B. Klinsky 2008 Long Term Trust directly owns these shares. The reporting person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.