Statements of Assets, Liabilities and Members' Capital - USD ($) $ in Thousands	Dec. 31, 2024		Dec. 31, 2023
Assets
Non-controlled/non-affiliated investments at fair value (cost of $375,695 and $85,367, respectively)	$ 377,794	[1]	$ 86,613	[2]
Cash and cash equivalents	19,551		19,876
Interest and dividend receivable	2,446		687
Other assets	121		148
Total assets	399,912		107,324
Borrowings
Deferred financing costs (net of accumulated amortization of $334 and $68, respectively)	(88)		(144)
Net borrowings	57,912		(144)
Payable for unsettled securities purchased	4,837		0
Income based incentive fee payable	777		153
Management fee payable	705		120
Interest payable	390		66
Accrued capital gains incentive fee	142		0
Accrued organizational and offering expenses	0		804
Total liabilities	65,570		1,494
Commitments and contingencies (See Note 8)
Members' Capital
Common units, 33,306,325 units and 10,560,000 issued and outstanding, respectively	332,573		105,445
Accumulated underdistributed earnings	1,769		385
Total members' capital	334,342		105,830	[3]
Total liabilities and members' capital	$ 399,912		$ 107,324
Members' capital per unit (in dollars per share)	$ 10.04		$ 10.02
BMO Subscription Line
Borrowings
BMO Subscription Line	$ 58,000		$ 0
Payable to affiliate
Borrowings
Payable to affiliates/ Other liabilities	305		63
Nonrelated Party
Borrowings
Payable to affiliates/ Other liabilities	$ 502		$ 432

[1] New Mountain Guardian IV Income Fund, L.L.C. (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 Guardian IV Income Fund, L.L.C. (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.

[3] For the year ended December 31, 2023, amounts represent the period from May 24, 2023 (commencement of operations) to December 31, 2023.