Note 7 - Stockholders' (Deficit) Equity (Tables)

6 Months Ended

Jun. 30, 2026

Notes Tables

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

		*Three Months Ended June 30,*								*Six Months Ended June 30,*
		*2026*				*2025*				*2026*				*2025*
Numerator used in basic and diluted EPS:
Net income		$	228.6			$	253.3			$	462.8			$	485.6
Denominator:
Weighted average number of common shares used in basic EPS			130,762,236				139,818,324				132,891,314				140,056,221
Effect of dilutive shares:
Potential common shares issuable from stock options and stock-based awards			88,302				521,215				145,240				583,326
Weighted average number of common shares and dilutive potential common shares used in diluted EPS			130,850,538				140,339,539				133,036,554				140,639,547

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

		*June 30, 2026*				*December 31, 2025*
Foreign currency translation adjustment, net of tax		$	146.1			$	172.8
Pension and postretirement adjustment, net of tax			(64.0	)			(65.8	)
Accumulated other comprehensive income		$	82.1			$	107.0

Comprehensive Income (Loss) [Table Text Block]

		*Before Tax*				*Tax (Expense) Benefit*				*After Tax*
For the Three Months Ended June 30, 2026
Foreign currency translation adjustment attributable to Verisk		$	(4.9	)		$	—			$	(4.9	)
Foreign currency translation adjustment attributable to noncontrolling interests			0.1				—				0.1
Foreign currency translation adjustment			(4.8	)			—				(4.8	)
Pension and postretirement adjustment before reclassifications			2.2				(0.5	)			1.7
Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive income ⁽¹⁾			(1.2	)			0.3				(0.9	)
Pension and postretirement adjustment			1.0				(0.2	)			0.8
Total other comprehensive loss		$	(3.8	)		$	(0.2	)		$	(4.0	)
For the Three Months Ended June 30, 2025
Foreign currency translation adjustment		$	69.0			$	—			$	69.0
Pension and postretirement adjustment before reclassifications			2.3				(0.5	)			1.8
Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive income ⁽¹⁾			(1.2	)			0.3				(0.9	)
Pension and postretirement adjustment			1.1				(0.2	)			0.9
Total other comprehensive income		$	70.1			$	(0.2	)		$	69.9

		*Before Tax*				*Tax (Expense) Benefit*				*After Tax*
For the Six Months Ended June 30, 2026
Foreign currency translation adjustment attributable to Verisk		$	(26.7	)		$	—			$	(26.7	)
Foreign currency translation adjustment attributable to noncontrolling interests			0.1				—				0.1
Foreign currency translation adjustment			(26.6	)			—				(26.6	)
Pension and postretirement adjustment before reclassifications			4.7				(1.2	)			3.5
Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive income ⁽¹⁾			(2.3	)			0.6				(1.7	)
Pension and postretirement adjustment			2.4				(0.6	)			1.8
Total other comprehensive income		$	(24.2	)		$	(0.6	)		$	(24.8	)
For the Six Months Ended June 30, 2025
Foreign currency translation adjustment attributable to Verisk		$	98.9			$	—			$	98.9
Foreign currency translation adjustment attributable to noncontrolling interests			0.4				—				0.4
Foreign currency translation adjustment			99.3				—				99.3
Pension and postretirement adjustment before reclassifications			4.5				(1.1	)			3.4
Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive income ⁽¹⁾			(2.2	)			0.6				(1.6	)
Pension and postretirement adjustment			2.3				(0.5	)			1.8
Total other comprehensive loss		$	101.6			$	(0.5	)		$	101.1