ADAPY · Adaptimmune Therapeutics PLC

The ordinary shares whose sale is reported on this line are represented by American Depositary Shares ("ADS") and are held in the form of ADSs by the Reporting Person. Each ADS represents six ordinary shares of the Issuer.

The 96,000 ordinary shares reported in Column 4 are represented by 16,000 ADSs.

The price reported in Column 4 of $0.0099 per ordinary share is derived from the sale price of $0.0594 per ADS divided by six. These ADSs were sold in multiple transactions at a price of $0.0594. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission with full information regarding the ADSs sold at this price in this footnote.

The Reporting Person does not hold any ordinary shares in the form of ADSs following this transaction. However, the Reporting Person holds nominal cost options and other options covering an aggregate of 11,140,760 ordinary shares of the Issuer.

The ordinary shares whose sale is reported on this line are represented by American Depositary Shares ("ADS") and are held in the form of ADSs by the Reporting Person. Each ADS represents six ordinary shares of the Issuer.

The 207,000 ordinary shares reported in Column 4 are represented by 34,500 ADSs.

The price reported in Column 4 of $0.01005 per ordinary share is derived from the sale price of $0.0603 per ADS divided by six. These ADSs were sold in multiple transactions at a price of $0.0603. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission with full information regarding the ADSs sold at this price in this footnote.

The 986,352 ordinary shares reported in Column 5 are held in the form of 164,392 ADSs by the Reporting Person and represent solely those ADSs held by the Reporting Person following this transaction. Additionally, the Reporting Person holds RSU-style options and other options covering an aggregate of 16,108,722 ordinary shares of the Issuer.

The Ordinary Shares whose sale is reported in this row are represented by American Depositary Shares ("ADSs") and are held of record by New Enterprise Associates 16, L.P. ("NEA 16"). NEA 16 holds these Ordinary Shares in the form of ADSs. Each ADS represents six Ordinary Shares of Adaptimmune Therapeutics plc (the "Issuer").

The prices reported in Column 4 are per Ordinary Share and were derived from the price per ADS divided by six. The reported price of $0.012 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.0114 to $0.0130 per Ordinary Share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of ADSs sold at each separate price within the range set forth in this footnote.

The Reporting Person is a manager of NEA 16 GP, LLC ("NEA 16 GP"), which is the sole general partner of NEA Partners 16, L.P. ("NEA Partners 16"). NEA Partners 16 is the sole general partner of NEA 16, which is the direct beneficial owner of the securities. The Reporting Person disclaims beneficial ownership within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the securities held by NEA 16 in which the Reporting Person has no pecuniary interest.

The Ordinary Shares whose sale is reported in this row are represented by American Depositary Shares ("ADSs") and are held of record by New Enterprise Associates 16, L.P. ("NEA 16"). NEA 16 holds these Ordinary Shares in the form of ADSs. Each ADS represents six Ordinary Shares of Adaptimmune Therapeutics plc (the "Issuer").

The prices reported in Column 4 are per Ordinary Share and were derived from the price per ADS divided by six. The reported price of $0.011 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.0099 to $0.0118 per Ordinary Share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission (the "SEC"), upon request, full information regarding the number of ADSs sold at each separate price within the range set forth in this footnote.

The Reporting Person is a manager of NEA 16 GP, LLC ("NEA 16 GP"), which is the sole general partner of NEA Partners 16, L.P. ("NEA Partners 16"). NEA Partners 16 is the sole general partner of NEA 16, which is the direct beneficial owner of the securities. The Reporting Person disclaims beneficial ownership within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the securities held by NEA 16 in which the Reporting Person has no pecuniary interest.

These Ordinary Shares are held through American Depositary Shares ("ADS") of the Issuer. Each ADS represents 6 Ordinary Shares.

The reporting persons sold 4,572,223 ADSs representing 27,433,338 Ordinary Shares. Qualified Fund sold 4,270,000 of those ADSs, representing 25,620,000 Ordinary Shares.

The price reported in Column 4 is the price per ADS sold by the reporting persons.

After this transaction, the reporting persons beneficially owned 16,728,647 ADSs, including 15,881,331 ADSs held by Qualified Fund representing 95,287,986 Ordinary Shares.

The reporting persons are EcoR1 Capital, LLC ("Ecor1"), Oleg Nodelman and EcoR1 Capital Fund Qualified, L.P. ("Qualified Fund"). EcoR1 is the general partner and investment adviser of private funds, including Qualified Fund (the "Fund"). Mr. Nodelman is the manager and controlling owner of EcoR1. EcoR1 is filing this Form 4 for itself, Mr. Nodelman and Qualified Fund. The filers are filing this Form 4 jointly, but not as a group, and each expressly disclaims membership in a group within the meaning of Rule 13d-5(b) under the Securities Exchange Act of 1934. The Funds hold these securities directly for the benefit of their investors. EcoR1 may be deemed to indirectly beneficially own them as the investment adviser to the Funds. Mr. Nodelman may be deemed to indirectly beneficially own them as the control person of EcoR1. The filers disclaim beneficial ownership of the securities except to the extent of their respective pecuniary interests therein.

These Ordinary Shares are held through American Depositary Shares ("ADS") of the Issuer. Each ADS represents 6 Ordinary Shares.

The reporting persons sold 447,910 ADSs representing 2,687,460 Ordinary Shares. Qualified Fund sold 418,303 of those ADSs, representing 2,509,818 Ordinary Shares.

The price reported in Column 4 is the price per ADS sold by the reporting persons.

After this transaction, the reporting persons beneficially owned 21,300,870 ADSs, including 20,151,331 ADSs held by Qualified Fund representing 120,907,986 Ordinary Shares.

The reporting persons are EcoR1 Capital, LLC ("Ecor1"), Oleg Nodelman and EcoR1 Capital Fund Qualified, L.P. ("Qualified Fund"). EcoR1 is the general partner and investment adviser of private funds, including Qualified Fund (the "Fund"). Mr. Nodelman is the manager and controlling owner of EcoR1. EcoR1 is filing this Form 4 for itself, Mr. Nodelman and Qualified Fund. The filers are filing this Form 4 jointly, but not as a group, and each expressly disclaims membership in a group within the meaning of Rule 13d-5(b) under the Securities Exchange Act of 1934. The Funds hold these securities directly for the benefit of their investors. EcoR1 may be deemed to indirectly beneficially own them as the investment adviser to the Funds. Mr. Nodelman may be deemed to indirectly beneficially own them as the control person of EcoR1. The filers disclaim beneficial ownership of the securities except to the extent of their respective pecuniary interests therein.

These Ordinary Shares are held through American Depositary Shares ("ADS") of the Issuer. Each ADS represents 6 Ordinary Shares.

The reporting persons sold 5,655,290 ADSs representing 33,931,740 Ordinary Shares. Qualified Fund sold 5,281,476 of those ADSs, representing 31,688,856 Ordinary Shares.

The price reported in Column 4 is the price per ADS sold by the reporting persons. This price is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.1086 to $0.1184, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission upon request, full information regarding the number of ADSs sold at each separate price within the ranges set forth in this footnote.

After this transaction, the reporting persons beneficially owned 21,748,780 ADSs, including 20,569,634 ADS held by Qualified Fund representing 123,417,804 Ordinary Shares.

The reporting persons are EcoR1 Capital, LLC ("Ecor1"), Oleg Nodelman and EcoR1 Capital Fund Qualified, L.P. ("Qualified Fund"). EcoR1 is the general partner and investment adviser of private funds, including Qualified Fund (the "Fund"). Mr. Nodelman is the manager and controlling owner of EcoR1. EcoR1 is filing this Form 4 for itself, Mr. Nodelman and Qualified Fund. The filers are filing this Form 4 jointly, but not as a group, and each expressly disclaims membership in a group within the meaning of Rule 13d-5(b) under the Securities Exchange Act of 1934. The Funds hold these securities directly for the benefit of their investors. EcoR1 may be deemed to indirectly beneficially own them as the investment adviser to the Funds. Mr. Nodelman may be deemed to indirectly beneficially own them as the control person of EcoR1. The filers disclaim beneficial ownership of the securities except to the extent of their respective pecuniary interests therein.

The exercise price was converted from GBP0.001, being the nominal value of an ordinary share, based on an exchange rate of U.S.$ 1.257137 to GBP1.00. The actual exercise price will be the pounds sterling amount.

Exercisable as to 268,674 Ordinary Shares on February 20, 2026 and will be exercisable as to the remainder in annual installments of 268,674 Ordinary Shares on the twentieth of each February from February 20, 2027 through February 20, 2029.

The expiration date of each annual installment of ordinary shares is March 15 of the calendar year following the year in which that installment becomes exercisable.

The exercise price was converted from GBP0.001, being the nominal value of an ordinary share, based on an exchange rate of U.S.$ 1.257137to GBP1.00. The actual exercise price will be the pounds sterling amount.

Exercisable as to 268,674 Ordinary Shares on February 20, 2026 and will be exercisable as to the remainder in annual installments of 268,674 Ordinary Shares on the twentieth of each February from February 20, 2027 through February 20, 2029.

The expiration date of each annual installment of ordinary shares is March 15 of the calendar year following the year in which that installment becomes exercisable.

The exercise price was converted from GBP0.08 based on an exchange rate of U.S.$ 1.257137 to GBP1.00. The actual exercise price will be the pounds sterling amount.

Exercisable as to 403,008 Ordinary Shares on February 20, 2026 and will be exercisable as to the remainder in monthly installments of 33,582 Ordinary Shares on the twentieth of each month from March 20, 2026 through January 20, 2028 and 33,654 Ordinary Shares on February 20, 2029.

The exercise price was converted from GBP0.08 based on an exchange rate of U.S.$ 1.257137 to GBP1.00. The actual exercise price will be the pounds sterling amount.

Exercisable as to 1,285,812 Ordinary Shares on February 20, 2026 and will be exercisable as to the remainder in monthly installments of 107,148 Ordinary Shares on the twentieth of each month from March 20, 2026 through January 20, 2028 and 107,256 Ordinary Shares on February 20, 2029.

The exercise price was converted from GBP0.001, being the nominal value of an ordinary share, based on an exchange rate of U.S.$ 1.257137 to GBP1.00. The actual exercise price will be the pounds sterling amount.

Exercisable as to 268,674 Ordinary Shares on February 20, 2026 and will be exercisable as to the remainder in annual installments of 268,674 Ordinary Shares on the twentieth of each February from February 20, 2027 through February 20, 2029.

The exercise price was converted from GBP0.08 based on an exchange rate of U.S.$ 1.257137 to GBP1.00. The actual exercise price will be the pounds sterling amount.

Exercisable as to 403,008 Ordinary Shares on February 20, 2026 and will be exercisable as to the remainder in monthly installments of 33,582 Ordinary Shares on the twentieth of each month from March 20, 2026 through January 20, 2028 and 33,654 Ordinary Shares on February 20, 2029.

The exercise price was converted from GBP0.001, being the nominal value of an ordinary share, based on an exchange rate of U.S.$ 1.257137 to GBP1.00. The actual exercise price will be the pounds sterling amount.

Exercisable as to 268,674 Ordinary Shares on February 20, 2026 and will be exercisable as to the remainder in annual installments of 268,674 Ordinary Shares on the twentieth of each February from February 20, 2027 through February 20, 2029.

The expiration date of each annual installment of ordinary shares is March 15 of the calendar year following the year in which that installment becomes exercisable.

The exercise price was converted from GBP0.001, being the nominal value of an ordinary share, based on an exchange rate of U.S.$ 1.257137 to GBP1.00. The actual exercise price will be the pounds sterling amount.

Exercisable as to 857,208 Ordinary Shares on February 20, 2026 and will be exercisable as to the remainder in annual installments of 857,208 Ordinary Shares on the twentieth of each February from February 20, 2027 through February 20, 2029.

The expiration date of each annual installment of ordinary shares is March 15 of the calendar year following the year in which that installment becomes exercisable.

The exercise price was converted from GBP0.001, being the nominal value of an ordinary share, based on an exchange rate of U.S.$ 1.257137 to GBP1.00. The actual exercise price will be the pounds sterling amount.

Exercisable as to 268,674 Ordinary Shares on February 20, 2026 and will be exercisable as to the remainder in annual installments of 268,674 Ordinary Shares on the twentieth of each February from February 20, 2027 through February 20, 2029.

The expiration date of each annual installment of ordinary shares is March 15 of the calendar year following the year in which that installment becomes exercisable.

The exercise price was converted from GBP0.08 based on an exchange rate of U.S.$ 1.257137 to GBP1.00. The actual exercise price will be the pounds sterling amount.

Exercisable as to 403,008 Ordinary Shares on February 20, 2026 and will be exercisable as to the remainder in monthly installments of 33,582 Ordinary Shares on the twentieth of each month from March 20, 2026 through January 20, 2028 and 33,654 Ordinary Shares on February 20, 2029.

The exercise price was converted from GBP0.08 based on an exchange rate of U.S.$ 1.257137 to GBP1.00. The actual exercise price will be the pounds sterling amount.

Exercisable as to 403,008 Ordinary Shares on February 20, 2026 and will be exercisable as to the remainder in monthly installments of 33,582 Ordinary Shares on the twentieth of each month from March 20, 2026 through January 20, 2028 and 33,654 Ordinary Shares on February 20, 2029.

The exercise price was converted from GBP0.08 based on an exchange rate of U.S.$ 1.257137 to GBP1.00. The actual exercise price will be the pounds sterling amount.

Exercisable as to 403,008 Ordinary Shares on February 20, 2026 and will be exercisable as to the remainder in monthly installments of 33,582 Ordinary Shares on the twentieth of each month from March 20, 2026 through January 20, 2028 and 33,654 Ordinary Shares on February 20, 2029.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately 25% of an RSU-style share option covering ordinary shares of the Issuer granted on January 17, 2023 and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. Each exercise of the portion of these RSU-style share options and each sale reported in this Form 4 was effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.5797 to $0.589, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission with full information regarding the ADSs sold at this price in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from each Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 191,382 ADSs and RSU-style options and other options covering an aggregate of 13,421,994 ordinary shares of the Issuer.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately 25% of an RSU-style share option covering ordinary shares of the Issuer granted on January 17, 2023 and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. The exercise of the portion of these RSU-style share options and the sale reported in this Form 4 were effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.5797 to $0.589, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission full information regarding the ADSs sold at each separate price within the range set forth in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from the Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 350,900 ADSs and RSU-style options and other options covering an aggregate of 34,439,286 ordinary shares of the Issuer.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately 25% of an RSU-style share option covering ordinary shares of the Issuer granted on January 17, 2023, and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. The exercise of the portion of these RSU-style share options and the sale reported in this Form 4 were effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.5797 to $0.589, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission full information regarding the ADSs sold at each separate price within the range set forth in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from each Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 125,755 ADSs and RSU-style options and other options covering an aggregate of 8,772,230 ordinary shares of the Issuer.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately 25% of an RSU-style share option covering ordinary shares of the Issuer granted on January 17, 2023 and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. Each exercise of the portion of these RSU-style share options and each sale reported in this Form 4 was effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.5797 to $0.589, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission with full information regarding the ADSs sold at this price in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from each Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 163,380 ADSs and RSU-style options and other options covering an aggregate of 10,135,962 ordinary shares of the Issuer.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately 25% of an RSU-style share option covering ordinary shares of the Issuer granted on January 15, 2024 and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. The exercise of the portion of these RSU-style share options and the sale reported in this Form 4 were effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.57 to $0.595, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission with full information regarding the ADSs sold at this price in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from the Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 265,806 ADSs and RSU-style options and other options covering an aggregate of 34,888,854 ordinary shares of the Issuer.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately 25% of an RSU-style share option covering ordinary shares of the Issuer granted on January 15, 2024 and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. Each exercise of the portion of these RSU-style share options and each sale reported in this Form 4 was effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.57 to $0.595, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission with full information regarding the ADSs sold at this price in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from each Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 136,156 ADSs and RSU-style options and other options covering an aggregate of 10,214,526 ordinary shares of the Issuer.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately 25% of an RSU-style share option covering ordinary shares of the Issuer granted on January 15, 2024 and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. Each exercise of the portion of these RSU-style share options and each sale reported in this Form 4 was effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.57 to $0.595, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission with full information regarding the ADSs sold at this price in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from each Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 164,158 ADSs and RSU-style options and other options covering an aggregate of 13,500,558 ordinary shares of the Issuer.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of 25% of the remaining balance of an RSU-style share option covering ordinary shares of the Issuer granted on March 18, 2024 and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. The exercise of the portion of these RSU-style share options and the sale reported in this Form 4 were effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.57 to $0.595, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission full information regarding the ADSs sold at each separate price within the range set forth in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from the Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 92,652 ADSs and RSU-style options and other options covering an aggregate of 6,779,928 ordinary shares of the Issuer.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately 25% of an RSU-style share option covering ordinary shares of the Issuer granted on January 15, 2024, and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. The exercise of the portion of these RSU-style share options and the sale reported in this Form 4 were effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.57 to $0.595, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission full information regarding the ADSs sold at each separate price within the range set forth in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from each Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 94,638 ADSs and RSU-style options and other options covering an aggregate of 8,850,794 ordinary shares of the Issuer.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately 25% of an RSU-style share option covering ordinary shares of the Issuer granted on January 12, 2022 and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. The exercise of the portion of these RSU-style share options and the sale reported in this Form 4 were effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.58 to $0.603, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission with full information regarding the ADSs sold at this price in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from the Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 265,806 ADSs and RSU-style options and other options covering an aggregate of 34,888,854 ordinary shares of the Issuer.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately 25% of an RSU-style share option covering ordinary shares of the Issuer granted on January 11, 2021, and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. The exercise of the portion of these RSU-style share options and the sale reported in this Form 4 were effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.58 to $0.603, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission full information regarding the ADSs sold at each separate price within the range set forth in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from each Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 94,638 ADSs and RSU-style options and other options covering an aggregate of 8,850,794 ordinary shares of the Issuer.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately 25% of an RSU-style share option covering ordinary shares of the Issuer granted on January 12, 2022 and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. Each exercise of the portion of these RSU-style share options and each sale reported in this Form 4 was effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.58 to $0.603, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission with full information regarding the ADSs sold at this price in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from each Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 136,156 ADSs and RSU-style options and other options covering an aggregate of 10,214,526 ordinary shares of the Issuer.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately 25% of an RSU-style share option covering ordinary shares of the Issuer granted on January 12, 2022, and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. The exercise of the portion of these RSU-style share options and the sale reported in this Form 4 were effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.58 to $0.603, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission full information regarding the ADSs sold at each separate price within the range set forth in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from each Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 94,638 ADSs and RSU-style options and other options covering an aggregate of 8,850,794 ordinary shares of the Issuer.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately 25% of an RSU-style share option covering ordinary shares of the Issuer granted on January 11, 2021 and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. The exercise of the portion of these RSU-style share options and the sale reported in this Form 4 were effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.58 to $0.603, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission with full information regarding the ADSs sold at this price in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from the Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 265,806 ADSs and RSU-style options and other options covering an aggregate of 34,888,854 ordinary shares of the Issuer.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately 25% of an RSU-style share option covering ordinary shares of the Issuer granted on January 11, 2021 and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. Each exercise of the portion of these RSU-style share options and each sale reported in this Form 4 was effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.58 to $0.603, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission with full information regarding the ADSs sold at this price in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from each Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 164,158 ADSs and RSU-style options and other options covering an aggregate of 13,500,558 ordinary shares of the Issuer.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately 25% of an RSU-style share option covering ordinary shares of the Issuer granted on January 12, 2022 and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. Each exercise of the portion of these RSU-style share options and each sale reported in this Form 4 was effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.58 to $0.603, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission with full information regarding the ADSs sold at this price in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from each Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 164,158 ADSs and RSU-style options and other options covering an aggregate of 13,500,558 ordinary shares of the Issuer.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately 25% of an RSU-style share option covering ordinary shares of the Issuer granted on January 11, 2021 and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. Each exercise of the portion of these RSU-style share options and each sale reported in this Form 4 was effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.58 to $0.603, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission with full information regarding the ADSs sold at this price in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from each Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 136,156 ADSs and RSU-style options and other options covering an aggregate of 10,214,526 ordinary shares of the Issuer.

The exercise price was converted from GBP0.13 based on an exchange rate of $U.S. 1.263714 to GBP1.00. The actual exercise price will be the pounds sterling amount.

The exercise price was converted from GBP0.13 based on an exchange rate of $U.S. 1.263714 to GBP1.00. The actual exercise price will be the pounds sterling amount.

The exercise price was converted from GBP0.13 based on an exchange rate of U.S.$ 1.263714 to GBP1.00. The actual exercise price will be the pounds sterling amount.

The exercise price was converted from GBP0.13 based on an exchange rate of $U.S. 1.263714 to GBP1.00. The actual exercise price will be the pounds sterling amount.

The exercise price was converted from GBP0.13 based on an exchange rate of $U.S. 1.263714 to GBP1.00. The actual exercise price will be the pounds sterling amount.

The exercise price was converted from GBP0.13 based on an exchange rate of $U.S. 1.263714 to GBP1.00. The actual exercise price will be the pounds sterling amount.

The exercise price was converted from GBP0.13 based on an exchange rate of $U.S. 1.263714 to GBP1.00. The actual exercise price will be the pounds sterling amount.

The exercise price was converted from GBP0.13 based on an exchange rate of U.S.$1.263714 to GBP1.00. The actual exercise price will be the pounds sterling amount.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately one third of an RSU-style share option covering ordinary shares of the Issuer granted on March 18, 2024 and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. The exercise of the portion of these RSU-style share options and the sale reported in this Form 4 were effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is the sale price per ADS.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from the Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 54,359 ADSs and RSU-style options and other options covering an aggregate of 6,968,400 ordinary shares of the Issuer.

The exercise price was converted from GBP0.001, being the nominal value of an ordinary share, based on an exchange rate of $U.S. 1.273980 to GBP1.00. The actual exercise price will be the pounds sterling amount.

Exercisable as to 376,944 Ordinary Shares on June 18, 2024 and will be exercisable as to the remainder in installments of 188,472 Ordinary Shares on January 15, 2025, January 15, 2026, January 15, 2027 and January 15, 2028.

The expiration date of each annual installment of ordinary shares is March 15 of the calendar year following the year in which that installment becomes exercisable.

The exercise price was converted from GBP0.19 based on an exchange rate of $U.S. 1.273980 to GBP1.00. The actual exercise price will be the pounds sterling amount.

Exercisable as to 1,679,325 Ordinary Shares on March 18, 2024 and will be exercisable as to the remainder in monthly installments of 94,704 Ordinary Shares on the last day of each month from April 18, 2024 through February 18, 2027 and 94,899 Ordinary Shares on March 18, 2027.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately 25% of an RSU-style share option covering ordinary shares of the Issuer granted on January 17, 2023 and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. The exercise of the portion of these RSU-style share options and the sale reported in this Form 4 were effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.67 to $0.73, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission with full information regarding the ADSs sold at this price in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from the Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 129,149 ADSs and RSU-style options and other options covering an aggregate of 13,781,154 ordinary shares of the Issuer.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately 25% of an RSU-style share option covering ordinary shares of the Issuer granted on January 17, 2023 and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. The exercise of the portion of these RSU-style share options and the sale reported in this Form 4 were effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.67 to $0.73, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission with full information regarding the ADSs sold at this price in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from the Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 206,854 ADSs and RSU-style options and other options covering an aggregate of 35,756,832 ordinary shares of the Issuer.

Each American Depositary Share ("ADS") represents six ordinary shares, nominal value GBP 0.001 per ordinary share, of the Issuer. The ADSs were obtained from the exercise of approximately 25% of an RSU-style share option covering ordinary shares of the Issuer granted on January 17, 2023 and which have vested. Once vested, the RSU-style options must be exercised within a restricted period or they are forfeited. The exercise of the portion of these RSU-style share options and the sale reported in this Form 4 were effected pursuant to a Sell to Cover exercise implemented automatically in accordance with the Issuer's option plan, under which sufficient ADSs were sold by the Issuer to satisfy the Reporting Person's tax withholding obligations and associated sale costs. The residual ADSs are held by the Reporting Person.

The price reported in Column 4 is a weighted average price. These ADSs were sold in multiple transactions at prices ranging from $0.67 to $0.73, inclusive. Upon request, the Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission with full information regarding the ADSs sold at this price in this footnote.

The ADSs reported in this Column 5 represent solely those residual ADSs held by the Reporting Person which result from the Sell to Cover exercise transaction reported on this Form 4. Additionally, the Reporting Person holds 102,333 ADSs and RSU-style options and other options covering an aggregate of 10,495,122 ordinary shares of the Issuer.