Fair Value Measurement and Disclosures (Tables) - ISQ Open Infrastructure Company LLC - Series II [Member]

12 Months Ended

Dec. 31, 2025

Fair Value Measurement and Disclosures (Tables) [Line Items]

Schedule of Investments and Cash and Cash Equivalents in Fair Value Hierarchy

The following table summarizes the valuation of Series II’s investments and cash and cash equivalents in the fair value hierarchy levels as of December 31, 2025:

Description	Level I		Level II		Level III		Total
Investments at fair value
Equity Investments	$	-	$	-	$	167,053,547	$	167,053,547
Debt Investments		-				16,126,398		16,126,398
Total Investments at fair value	$	-	$	-	$	183,179,945	$	183,179,945

Schedule of Reconciliation of Investments Level III Inputs

The following table provides a reconciliation of the beginning and ending balances for investments that use Level III inputs for the period from March 28, 2025 (Funding Date) to December 31, 2025.

Description	Amount
Balance as of the Funding Date	$	-
Purchases		139,937,414
Net change in unrealized gain (loss) on investments		43,242,531
Transfers out of Level III		-
Transfers into Level III		-
Balance as of December 31, 2025	$	183,179,945

Schedule of Quantitative Measures Used to Determine the Fair Values

The following table provides quantitative measures used to determine the fair values of the Level III assets as of December 31, 2025:

Level III Assets	Fair Value		Valuation Methodology & Inputs	Unobservable Input(s)(1)	Weighted Average(2)			Range	Impact to Valuation from an Increase in Input (3)
Equity Investments	$	167,053,547	Discounted Cash Flow	Discount Rate		12.3	%	11.5% - 17.3%	Decrease
			Discounted Cash Flow	Exit Multiple		7.4x		5.0x -15.0x	Increase
Debt Investments		16,126,398	Discounted Cash Flow	Discount Rate		10.4	%	9.0% - 13.0%	Decrease