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Fair Value Measurements
9 Months Ended
Sep. 30, 2023
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
The following tables present the Company’s fair value hierarchy for financial assets and liabilities measured as of September 30, 2023 and December 31, 2022 ($ in millions):

September 30, 2023
Level 1Level 2Level 3Total
Financial Assets:
Corporate debt securities$— $451.0 $— $451.0 
U.S. Government obligations— 182.0 — 182.0 
Asset-backed securities— 0.4 — 0.4 
Fixed maturities$— $633.4 $— $633.4 
Short term investments— 73.4 — 73.4 
Total$— $706.8 $— $706.8 
Financial Liabilities:
Warrant Liability (1)
$— $— $— $— 
(1) Fair value of Public and Private warrant liability amounted to less than $0.1 million as of September 30, 2023.
December 31, 2022
Level 1Level 2Level 3Total
Financial Assets:
Corporate debt securities$— $530.2 $— $530.2 
U.S. Government obligations— 117.3 — 117.3 
Asset-backed securities— 2.8 — 2.8 
Fixed maturities $— $650.3 $— $650.3 
Short term investments— 99.8 — 99.8 
Total$— $750.1 $— $750.1 
Financial Liabilities:
Warrant Liability$— $— $0.3 $0.3 
The fair value of all different classes of Level 2 fixed maturities and short-term investments are estimated by using quoted prices from a third-party valuation service provider to gather, analyze and interpret market information and derive fair values based upon relevant methodologies and assumptions for individual instruments.
There were no transfers between Level 1, Level 2, or Level 3 during the three and nine months ended September 30, 2023, other than the public and private warrants previously reported as Level 3 except as discussed below. There were no transfers between Level 1, Level 2, or Level 3 during the year ended December 31, 2022.
Warrant liability
As part of the Metromile Acquisition as discussed in Note 5, public and private warrants were assumed and are measured at fair value on a recurring basis at the end of the reporting period, and classified as Level 3 for fair value hierarchy disclosure purposes as of December 31, 2022. These warrants do not meet the criteria for equity treatment and are recorded as a liability and presented under "Other liabilities and accrued expenses" on the consolidated balance sheet at fair value, with changes in fair value recognized and presented under "General and administrative expenses" in the consolidated statements of operations and comprehensive loss. The Company utilized the binomial Monte-Carlo simulation to estimate the fair value of the warrants which were not actively traded as of December 31, 2022.
The public warrants liability is classified as Level 1 for fair value hierarchy disclosure purposes as of March 31, 2023, due to the use of an observable market quote in an active market, following the listing of the public warrants in New York Stock Exchange American. The Company also reclassified the private warrants liability from Level 3 to Level 2 as of March 31, 2023, as the Company utilizes the observable prices of the public warrants in deriving the value of the private placement warrants.
The following table below presents the change in fair value of the warrant liability (Public and Private) ($ in millions):
September 30, 2023
Balance as of January 1$0.3 
Change in fair value(0.3)
Balance as of September 30 (1)
$— 
(1) Fair value of Public and Private warrant liability amounted to less than $0.1 million as of September 30, 2023.