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Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2023
Fair Value Disclosures [Abstract]  
Schedule of Carrying Value and Fair Value of Assets and Liabilities
The following table shows assets and liabilities that are measured at fair value on a recurring basis and their carrying value (in millions):
As of December 31, 2023
Fair Value
Carrying ValueLevel 1Level 2Level 3
Assets
Cash and cash equivalents$482.4 $482.4 $— $— 
Marketable securities$298.1 $298.1 $— $— 
Collateral for interest rate swap$6.0 $6.0 $— $— 
Liabilities
Interest rate swap$1.2 $— $1.2 $— 
Deferred consideration$5.7 $— $5.7 $— 
Contingent consideration$84.6 $— $— $84.6 
As of December 31, 2022
Fair Value
Carrying ValueLevel 1Level 2Level 3
Assets
Cash and cash equivalents$1,074.0 $1,074.0 $— $— 
Marketable securities$74.2 $74.2 $— $— 
Collateral for interest rate swap$5.0 $5.0 $— $— 
Liabilities
Interest rate swap$1.5 $— $1.5 $— 
Deferred consideration$7.4 $— $7.4 $— 
Contingent consideration$58.1 $— $— $58.1 
Schedule of Observable Inputs in Valuation of Deferred Consideration
The following observable input was used in the valuation of the deferred consideration as of December 31, 2023 and 2022:
Fair Value as of December 31, 2023
(in millions)
Observable InputInput Value
Deferred consideration$5.7
Insmed share price on December 31, 2023
$30.99
Fair Value as of December 31, 2022
(in millions)
Observable InputInput Value
Deferred consideration$7.4
Insmed share price on December 31, 2022
$19.98
The following significant unobservable inputs were used in the valuation of the contingent consideration liabilities as of December 31, 2023 and 2022 (in millions):
Contingent Consideration LiabilitiesFair Value as of December 31, 2023Valuation TechniqueUnobservable InputsValues
Development and regulatory milestones$74.8Probability-adjustedProbabilities of success
14% - 97%
Priority review voucher milestone$6.0Probability-adjusted discounted cash flowProbability of success16.4%
Discount rate10.0%
Contingent Consideration LiabilitiesFair Value as of December 31, 2022Valuation TechniqueUnobservable InputsValues
Development and regulatory milestones$48.1Probability-adjustedProbabilities of success
14% - 95%
Priority review voucher milestone$6.8Probability-adjusted discounted cash flowProbability of success16.4%
Discount rate8.5%
A rollforward of the Company's valuations deferred and contingent consideration liabilities for the years ended December 31, 2023 and 2022 follows (in thousands):
Deferred Consideration (level 2 liabilities)Contingent Consideration
 (level 3 liabilities)
Balance as of December 31, 2021$14,931 $75,668 
Additions— — 
Change in Fair Value(3,234)(17,568)
Payments(4,297)— 
Balance as of December 31, 20227,400 58,100 
Additions— — 
Change in Fair Value2,197 26,500 
Payments(3,897)— 
Balance as of December 31, 2023$5,700 $84,600