Note 3 — Revenue

The Company had two revenue-generating contracts with customers in the three months ended March 31, 2023, compared to three in the three months ended March 31, 2022: a collaboration agreement with Astellas that was terminated as of March 6, 2023 and a strategic collaboration and license agreement with Genentech. A further collaboration and license agreement with GSK was terminated in 2022.

Revenue comprises the following categories (in thousands):

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Deferred revenue decreased by $42,857,000 from $184,412,000 at December 31, 2022 to $141,555,000 at March 31, 2023 primarily due to revenue recognized during the quarter but was partially offset by a $3,368,000 increase caused by the change in the exchange rate between pound sterling and the U.S. dollar from £1.00 to $1.21 at December 31, 2022 to £1.00 to $1.24 at March 31, 2023.

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As of December 31, 2022, there was deferred revenue of $184,412,000 of which $46,784,000 was recognized as revenue in the three months ended March 31, 2023

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The aggregate amount of the transaction price that is allocated to performance obligations that are unsatisfied or partially satisfied under the agreements as of March 31, 2023 was $283,005,000.

The Genentech Collaboration and License Agreement

The amount of the transaction price that is allocated to performance obligations that are unsatisfied or partially satisfied under the Genentech agreement as of March 31, 2023 was $283,005,000. Of this amount $174,008,000 is allocated to the research services and rights granted for the initial ‘off-the-shelf’ collaboration targets, $89,843,000 is allocated to the research services and rights granted for the personalized therapies, $12,929,000 is allocated to the material rights to designate the additional ‘off-the-shelf’ collaboration targets, $4,980,000 is allocated to the material right for the first option to extend the research term and $1,245,000 is allocated to the material right for the option to extend the research term a second time.

The Company expects to satisfy the performance obligations relating to the initial ‘off-the-shelf’ collaboration targets and the personalized therapies as development progresses and recognizes revenue based on an estimate of the percentage of completion of the project determined based on the costs incurred on the project as a percentage of the total expected costs. The Company expects to satisfy the performance obligations relating to the material rights to designate additional ‘off-the-shelf’ collaboration targets from the point that the options are exercised and then as development progresses, in line with the initial ‘off-the-shelf’ collaboration targets, or at the point in time that the rights expire. The Company expects to satisfy the performance obligations relating to the material rights to extend the

research term from the point that the options are exercised and then over the period of the extension, or at the point in time that the rights expire.

The Astellas Collaboration Agreement

The Company and Universal Cells mutually agreed to terminate the Astellas Collaboration Agreement as of March 6, 2023 (the “Termination Date”). In connection with the termination, all licenses and sublicenses granted to either party pursuant to the Collaboration Agreement ceased as of the Termination Date. There were no termination penalties in connection with the termination, however the Company is still entitled to receive reimbursement for research and development work performed up to and including a period of 30 days after the Termination Date.

The Company originally satisfied the performance obligations relating to the three co-development targets as development progresses and recognized revenue based on an estimate of the percentage of completion of the project determined based on the costs incurred on the project as a percentage of the total expected costs. The Company originally determined that the performance obligations relating to the two independent Astellas targets would be recognized at a point-in-time, upon commencement of the licenses in the event of nomination of the target, since they were right-to-use licenses.

The termination was accounted for as a contract modification on a cumulative catch-up basis. No performance obligations were identified as a result of the modification as there were no further goods or services to be provided by the Company and the modification resulted in the remaining unsatisfied and partially satisfied performance obligations under the collaboration becoming fully satisfied. The aggregate transaction price of the contract modification was $42,365,000 which included the remaining deferred income that had not been recognized as revenue as of the date of the modification and variable consideration from the remaining reimbursement income to be billed under the collaboration at the end of the 30 day period after the Effective Date. The transaction price of the modification was recognized in full in March 2023 and there is no remaining transaction price allocated to performance obligations that are unsatisfied or partially satisfied under, and no remaining deferred income relating to, the agreement as of March 31, 2023.

The GSK Collaboration and License Agreement

The GSK Collaboration and License Agreement consisted of multiple performance obligations, including the development of a third target, which was the only performance obligation for which revenue was recognised in 2022.

The collaboration was terminated by GSK in October 2022 (effective December 23, 2022). A further amendment to the collaboration agreement was entered into on December 19, 2022 for the deletion of certain provisions relating to GSK’s post termination manufacturing and supply obligations and payment of £5,000,000 by GSK to Adaptimmune. The aggregate transaction price of the contract modification was $6,500,000, which was recognized as revenue on the date of the modification. No revenue was recognized in relation to the GSK Collaboration and License Agreement in 2023.

A further Termination and Transfer Agreement was entered into on April 6, 2023. As this occurred after March 31, 2023, there was no impact on the Consolidated financial statements in the three months ended March 31, 2023, see Note 15 for further details.