Equity Method and Other Equity Investments	9 Months Ended
Sep. 30, 2022
Equity Method And Cost Method Investment [Abstract]
Equity Method and Other Equity Investments	7. Equity Method and Other Equity Investments In October 2019, our subsidiary, BridgeBio Pharma LLC (“BBP LLC”), entered into an exclusivity agreement with LianBio, pursuant to which BBP LLC received equity in LianBio representing a 10% ownership interest, valued at approximately $3.8 million at the time of the transaction. The equity interest was issued in consideration for certain rights of first negotiation and rights of first offer granted by BBP LLC to LianBio with respect to specified transactions covering intellectual property rights owned or controlled by BBP LLC or its affiliates in certain territories outside the United States. The equity interest gave BBP LLC the right to appoint or remove one director to the board of directors of LianBio, and, therefore, the ability to exercise significant influence over LianBio. As a result, we accounted for this investment under the equity method and LianBio was considered a related party. There were no impairments and the carrying amount of the equity method investment represented our maximum loss exposure related to our investment in LianBio during the three and nine months ended September 30, 2021. On November 1, 2021, LianBio completed its IPO. Upon completion of the LianBio IPO, BBP LLC’s ownership in LianBio was reduced to approximately 4.7% of LianBio’s fully-diluted equity and, pursuant to the exclusivity agreement, BBP LLC’s right to appoint or remove one director to the board of directors of LianBio was terminated. As of November 1, 2021, BBP LLC no longer exercises significant influence over LianBio; and, therefore, we accounted for BBP LLC’s equity interest in LianBio under ASC 321. LianBio is also no longer considered a related party. Consequently, we recognized a $68.5 million gain on conversion from equity method investment to investment in equity securities during the fourth quarter of fiscal year 2021. As of September 30, 2022 and December 31, 2021, we recorded $58.5 million and $37.7 million, respectively, in cumulative unrealized loss for the ongoing mark-to-market adjustments of this investment. Pursuant to a License Agreement entered into in October 2019 between QED and LianBio, QED also received warrants which entitled QED to purchase 10% of the then-fully diluted shares of one of the subsidiaries of LianBio upon achievement of certain contingent development milestones. Changes in fair value of the warrants were not material in 2021. In October 2021, the warrants held by QED to purchase shares of one of the subsidiaries of LianBio were converted into the LianBio Warrant, which entitles QED to purchase 347,569 shares of LianBio. The LianBio Warrant is measured at fair value on a recurring basis, with changes in fair value recognized in our condensed consolidated statements of operations as part of “Other income (expense), net.” The LianBio Warrant, which is presented as part of “Other assets” in our condensed consolidated balance sheets, had a fair value of $0.7 million and $2.1 million as of September 30, 2022 and December 31, 2021, respectively.

Equity Method and Other Equity Investments

9 Months Ended

Sep. 30, 2022

Equity Method And Cost Method Investment [Abstract]

Equity Method and Other Equity Investments

In October 2019, our subsidiary, BridgeBio Pharma LLC (“BBP LLC”), entered into an exclusivity agreement with LianBio, pursuant to which BBP LLC received equity in LianBio representing a 10% ownership interest, valued at approximately $3.8 million at the time of the transaction. The equity interest was issued in consideration for certain rights of first negotiation and rights of first offer granted by BBP LLC to LianBio with respect to specified transactions covering intellectual property rights owned or controlled by BBP LLC or its affiliates in certain territories outside the United States. The equity interest gave BBP LLC the right to appoint or remove one director to the board of directors of LianBio, and, therefore, the ability to exercise significant influence over LianBio. As a result, we accounted for this investment under the equity method and LianBio was considered a related party.

There were no impairments and the carrying amount of the equity method investment represented our maximum loss exposure related to our investment in LianBio during the three and nine months ended September 30, 2021.

On November 1, 2021, LianBio completed its IPO. Upon completion of the LianBio IPO, BBP LLC’s ownership in LianBio was reduced to approximately 4.7% of LianBio’s fully-diluted equity and, pursuant to the exclusivity agreement, BBP LLC’s right to appoint or remove one director to the board of directors of LianBio was terminated. As of November 1, 2021, BBP LLC no longer exercises significant influence over LianBio; and, therefore, we accounted for BBP LLC’s equity interest in LianBio under ASC 321. LianBio is also no longer considered a related party. Consequently, we recognized a $68.5 million gain on conversion from equity method investment to investment in equity securities during the fourth quarter of fiscal year 2021. As of September 30, 2022 and December 31, 2021, we recorded $58.5 million and $37.7 million, respectively, in cumulative unrealized loss for the ongoing mark-to-market adjustments of this investment.

Pursuant to a License Agreement entered into in October 2019 between QED and LianBio, QED also received warrants which entitled QED to purchase 10% of the then-fully diluted shares of one of the subsidiaries of LianBio upon achievement of certain contingent development milestones. Changes in fair value of the warrants were not material in 2021.

In October 2021, the warrants held by QED to purchase shares of one of the subsidiaries of LianBio were converted into the LianBio Warrant, which entitles QED to purchase 347,569 shares of LianBio. The LianBio Warrant is measured at fair value on a recurring basis, with changes in fair value recognized in our condensed consolidated statements of operations as part of “Other income (expense), net.” The LianBio Warrant, which is presented as part of “Other assets” in our condensed consolidated balance sheets, had a fair value of $0.7 million and $2.1 million as of September 30, 2022 and December 31, 2021, respectively.