Acquisitions	12 Months Ended
Dec. 31, 2022
Business Combinations [Abstract]
Acquisitions	4. Acquisitions Acquisition of TomegaVax In September 2016, the Company entered into an agreement and plan of merger (“TomegaVax Merger Agreement”) to acquire all of the equity interests of TomegaVax. The primary asset purchased in the acquisition was an in-process cytomegalovirus (“CMV”) vector-based vaccine platform for use in HBV, HIV, and tuberculosis. The acquisition was accounted for as an asset purchase. In connection with the entry into the TomegaVax Merger Agreement, the Company also entered into a letter agreement with TomegaVax (the “TomegaVax Letter Agreement”), which provides for certain payments to TomegaVax’s former stockholders before September 2024, in each case so long as the Company is continuing to pursue the development of the TomegaVax technology. Under the terms of the TomegaVax Letter Agreement, the Company will be required to pay to the former stockholders of TomegaVax milestone payments of up to an aggregate of $30.0 million if the per-share price of the Company’s publicly traded common stock, or implied price per share of the Company’s Series A-1 convertible preferred stock (or common stock upon conversion) upon a certain asset sale, merger or stock sale, is at least $45 (as adjusted in the case of any stock dividend, stock split or other similar recapitalization), with the amount of such payments determined by the share price and/or the stage of the Company’s clinical development at the time of the relevant event triggering the payment. The share price of the Company’s publicly traded common stock will be determined using the average of the daily volume-weighted average trading price of the Company’s common stock for each trading day during a consecutive 90-day period. The foregoing payments are payable (i) during any date after the completion of an initial public offering by the Company or any successor or affiliate controlling the TomegaVax technology, provided that no payment will be due before the first anniversary of the initial public offering, (ii) upon the sale of all assets related to the TomegaVax technology or (iii) upon a merger or stock sale of the Company or any successor or affiliate controlling the TomegaVax technology, in each case subject to certain conditions with respect to the timing of the payments. The payments under the TomegaVax Letter Agreement can be made in cash or shares of the Company’s common stock, at the discretion of the Company’s board of directors. In February 2021, the Company achieved one of the milestones related to the specified per-share price of its common stock, which resulted in a $10.0 million payable to TomegaVax’s former stockholders. In July 2021, the Company made the milestone payment to the former TomegaVax stockholders through a combination of $8.1 million in cash and the issuance of 42,737 shares of common stock with a total fair value of $1.9 million. The remaining milestone payments of up to $20.0 million in the aggregate will be triggered if (i) the per-share price of the Company’s publicly traded common stock is at least $45 (as adjusted in the case of any stock dividend, stock split or other similar recapitalization) and upon the achievement of a certain milestone related to the stage of the Company’s clinical development at the time of the relevant event triggering the payment and/or (ii) the per-share price of the Company’s publicly traded common stock is at least $90 (as adjusted in the case of any stock dividend, stock split or other similar recapitalization). The Company determined that the future milestone payments contain net settlement provisions and, therefore, they were required to be accounted for as embedded derivatives under the relevant accounting guidance. As of December 31, 2022, the estimated fair value of the embedded derivative was $1.5 million and was included in the contingent consideration liability on the consolidated balance sheet. Acquisition of Humabs In August 2017, the Company acquired all of the outstanding equity of Humabs, a private Swiss company, which discovers and develops monoclonal antibodies (“mAbs”) derived from individuals whose immune systems have successfully responded to major diseases. The Company acquired all of Humabs’ rights, title and interest in and to substantially all of the assets of Humabs except for rights under certain license agreements with third parties. The Company is obligated to pass through to the former Humabs shareholders any amounts received by Humabs under such license agreements, net of any program expenses. The transaction was accounted for as an acquisition of a business. In addition to the cash payment and issuance of common stock to the former Humabs shareholders at the acquisition date, the Company also agreed to pay additional amounts in cash upon the achievement of specified milestone events: (i) up to $135.0 million upon the achievement of clinical, regulatory and commercial milestones for VIR-3434; and (ii) up to $105.0 million upon the achievement of clinical, regulatory and commercial milestones for another product, which the Company elected as sotrovimab, a severe acute respiratory syndrome coronavirus 2 (“SARS-CoV-2”) product. During the year ended December 31, 2020, the Company achieved two of the specified clinical milestones for the HBV product and sotrovimab totaling $20.0 million. During the year ended December 31, 2021, the Company achieved the specified regulatory milestone of $35.0 million and sales milestones totaling $60.0 million related to sotrovimab, which were paid in January and February 2022, respectively. The estimated fair value of the remaining contingent consideration was $23.4 million as of December 31, 2022. The acquired developed technologies that have associated patents issued are classified as finite-lived intangible assets and are amortized on a straight-lined basis over their estimated remaining useful lives, generally between seven to 12 years. The Company also acquired indefinite-lived intangible assets consisting of IPR&D. These assets will not be amortized until regulatory approval is obtained in a major market. At that time, the Company will determine the useful life of the asset and begin amortization. If the associated research and development effort is abandoned or otherwise impaired, the related IPR&D assets will be written-off and an impairment charge will be recorded. As of December 31, 2022, there have been no such impairments related to the IPR&D assets. The estimated fair value of the intangible assets was determined using the replacement cost method. The excess of the purchase price over the estimated fair value of the net assets acquired was recorded as goodwill. None of the goodwill is expected to be deductible for income tax purposes.

Acquisitions

12 Months Ended

Dec. 31, 2022

Acquisition of TomegaVax

In September 2016, the Company entered into an agreement and plan of merger (“TomegaVax Merger Agreement”) to acquire all of the equity interests of TomegaVax. The primary asset purchased in the acquisition was an in-process cytomegalovirus (“CMV”) vector-based vaccine platform for use in HBV, HIV, and tuberculosis. The acquisition was accounted for as an asset purchase.

In connection with the entry into the TomegaVax Merger Agreement, the Company also entered into a letter agreement with TomegaVax (the “TomegaVax Letter Agreement”), which provides for certain payments to TomegaVax’s former stockholders before September 2024, in each case so long as the Company is continuing to pursue the development of the TomegaVax technology. Under the terms of the TomegaVax Letter Agreement, the Company will be required to pay to the former stockholders of TomegaVax milestone payments of up to an aggregate of $30.0 million if the per-share price of the Company’s publicly traded common stock, or implied price per share of the Company’s Series A-1 convertible preferred stock (or common stock upon conversion) upon a certain asset sale, merger or stock sale, is at least $45 (as adjusted in the case of any stock dividend, stock split or other similar recapitalization), with the amount of such payments determined by the share price and/or the stage of the Company’s clinical development at the time of the relevant event triggering the payment. The share price of the Company’s publicly traded common stock will be determined using the average of the daily volume-weighted average trading price of the Company’s common stock for each trading day during a consecutive 90-day period. The foregoing payments are payable (i) during any date after the completion of an initial public offering by the Company or any successor or affiliate controlling the TomegaVax technology, provided that no payment will be due before the first anniversary of the initial public offering, (ii) upon the sale of all assets related to the TomegaVax technology or (iii) upon a merger or stock sale of the Company or any successor or affiliate controlling the TomegaVax technology, in each case subject to certain conditions with respect to the timing of the payments. The payments under the TomegaVax Letter Agreement can be made in cash or shares of the Company’s common stock, at the discretion of the Company’s board of directors.

In February 2021, the Company achieved one of the milestones related to the specified per-share price of its common stock, which resulted in a $10.0 million payable to TomegaVax’s former stockholders. In July 2021, the Company made the milestone payment to the former TomegaVax stockholders through a combination of $8.1 million in cash and the issuance of 42,737 shares of common stock with a total fair value of $1.9 million. The remaining milestone payments of up to $20.0 million in the aggregate will be triggered if (i) the per-share price of the Company’s publicly traded common stock is at least $45 (as adjusted in the case of any stock dividend, stock split or other similar recapitalization) and upon the achievement of a certain milestone related to the stage of the Company’s clinical development at the time of the relevant event triggering the payment and/or (ii) the per-share price of the Company’s publicly traded common stock is at least $90 (as adjusted in the case of any stock dividend, stock split or other similar recapitalization).

The Company determined that the future milestone payments contain net settlement provisions and, therefore, they were required to be accounted for as embedded derivatives under the relevant accounting guidance. As of December 31, 2022, the estimated fair value of the embedded derivative was $1.5 million and was included in the contingent consideration liability on the consolidated balance sheet.

Acquisition of Humabs

In August 2017, the Company acquired all of the outstanding equity of Humabs, a private Swiss company, which discovers and develops monoclonal antibodies (“mAbs”) derived from individuals whose immune systems have successfully responded to major diseases. The Company acquired all of Humabs’ rights, title and interest in and to substantially all of the assets of Humabs except for rights under certain license agreements with third parties. The Company is obligated to pass through to the former Humabs shareholders any amounts received by Humabs under such license agreements, net of any program expenses. The transaction was accounted for as an acquisition of a business. In addition to the cash payment and issuance of common stock to the former Humabs shareholders at the acquisition date, the Company also agreed to pay additional amounts in cash upon the achievement of specified milestone events: (i) up to $135.0 million upon the achievement of clinical, regulatory and commercial milestones for VIR-3434; and (ii) up to $105.0 million upon the achievement of clinical, regulatory and commercial milestones for another product, which the Company elected as sotrovimab, a severe acute respiratory syndrome coronavirus 2 (“SARS-CoV-2”) product.

During the year ended December 31, 2020, the Company achieved two of the specified clinical milestones for the HBV product and sotrovimab totaling $20.0 million. During the year ended December 31, 2021, the Company achieved the specified regulatory milestone of $35.0 million and sales milestones totaling $60.0 million related to sotrovimab, which were paid in January and February 2022, respectively. The estimated fair value of the remaining contingent consideration was $23.4 million as of December 31, 2022.

The acquired developed technologies that have associated patents issued are classified as finite-lived intangible assets and are amortized on a straight-lined basis over their estimated remaining useful lives, generally between seven to 12 years. The Company also acquired indefinite-lived intangible assets consisting of IPR&D. These assets will not be amortized until regulatory approval is obtained in a major market. At that time, the Company will determine the useful life of the asset and begin amortization. If the associated research and development effort is abandoned or otherwise impaired, the related IPR&D assets will be written-off and an impairment charge will be recorded. As of December 31, 2022, there have been no such impairments related to the IPR&D assets. The estimated fair value of the intangible assets was determined using the replacement cost method. The excess of the purchase price over the estimated fair value of the net assets acquired was recorded as goodwill. None of the goodwill is expected to be deductible for income tax purposes.