
| 1. | Details of the person discharging managerial responsibilities / person closely associated | |||||||||||||
| a) | Name | Jan van de Winkel | ||||||||||||
| 2. | Reason for the notification | |||||||||||||
| a) | Position/status | President & Chief Executive Officer | ||||||||||||
| b) | Initial notification/Amendment | Amendment to Company Announcement no. 13 of March 2, 2026 | ||||||||||||
| 3. | Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor | |||||||||||||
| a) | Name | Genmab A/S | ||||||||||||
| b) | LEI-code | 529900MTJPDPE4MHJ122 | ||||||||||||
| 4. | Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted | |||||||||||||
| a) | Description of the financial instrument, type of instrument Identification code | Share DK0010272202 | ||||||||||||
| b) | Nature of the transaction | Acquisition due to vesting of restricted stock units | ||||||||||||
| c) | Price(s) and volume(s) | Price(s) | Volume(s) | |||||||||||
DKK 1,867.50 | 567 | |||||||||||||
| d) | Aggregated information - Aggregated volume - Price | 567 shares DKK 1,867.50 | ||||||||||||
| e) | Date of the transaction | 2026-03-02 | ||||||||||||
| f) | Place of the transaction | Outside the market | ||||||||||||
| Genmab A/S Carl Jacobsens Vej 30 2500 Valby, Denmark | Tel: +45 7020 2728 www.genmab.com | Company Announcement no. 14 Page 1/6 CVR no. 2102 3884 LEI Code 529900MTJPDPE4MHJ122 | ||||||

| 1. | Details of the person discharging managerial responsibilities / person closely associated | |||||||||||||
| a) | Name | Anthony Pagano | ||||||||||||
| 2. | Reason for the notification | |||||||||||||
| a) | Position/status | Executive Vice President & Chief Financial Officer | ||||||||||||
| b) | Initial notification/Amendment | Amendment to Company Announcement no. 13 of March 2, 2026 | ||||||||||||
| 3. | Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor | |||||||||||||
| a) | Name | Genmab A/S | ||||||||||||
| b) | LEI-code | 529900MTJPDPE4MHJ122 | ||||||||||||
| 4. | Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted | |||||||||||||
| a) | Description of the financial instrument, type of instrument Identification code | Share DK0010272202 | ||||||||||||
| b) | Nature of the transaction | Acquisition due to vesting of restricted stock units | ||||||||||||
| c) | Price(s) and volume(s) | Price(s) | Volume(s) | |||||||||||
DKK 1,867.50 | 200 | |||||||||||||
| d) | Aggregated information - Aggregated volume - Price | 200 shares DKK 1,867.50 | ||||||||||||
| e) | Date of the transaction | 2026-03-02 | ||||||||||||
| f) | Place of the transaction | Outside the market | ||||||||||||
| Genmab A/S Carl Jacobsens Vej 30 2500 Valby, Denmark | Tel: +45 7020 2728 www.genmab.com | Company Announcement no. 14 Page 2/6 CVR no. 2102 3884 LEI Code 529900MTJPDPE4MHJ122 | ||||||

| 1. | Details of the person discharging managerial responsibilities / person closely associated | |||||||||||||
| a) | Name | Mijke Zachariasse | ||||||||||||
| 2. | Reason for the notification | |||||||||||||
| a) | Position/status | Member of the Board of Directors | ||||||||||||
| b) | Initial notification/Amendment | Amendment to Company Announcement no. 13 of March 2, 2026 | ||||||||||||
| 3. | Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor | |||||||||||||
| a) | Name | Genmab A/S | ||||||||||||
| b) | LEI-code | 529900MTJPDPE4MHJ122 | ||||||||||||
| 4. | Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted | |||||||||||||
| a) | Description of the financial instrument, type of instrument Identification code | Share DK0010272202 | ||||||||||||
| b) | Nature of the transaction | Acquisition due to vesting of restricted stock units (as employee of Genmab B.V.) | ||||||||||||
| c) | Price(s) and volume(s) | Price(s) | Volume(s) | |||||||||||
DKK 1,867.50 | 64 | |||||||||||||
| d) | Aggregated information - Aggregated volume - Price | 64 shares DKK 1,867.50 | ||||||||||||
| e) | Date of the transaction | 2026-03-02 | ||||||||||||
| f) | Place of the transaction | Outside the market | ||||||||||||
| Genmab A/S Carl Jacobsens Vej 30 2500 Valby, Denmark | Tel: +45 7020 2728 www.genmab.com | Company Announcement no. 14 Page 3/6 CVR no. 2102 3884 LEI Code 529900MTJPDPE4MHJ122 | ||||||

| 1. | Details of the person discharging managerial responsibilities / person closely associated | |||||||||||||
| a) | Name | Martin Schultz | ||||||||||||
| 2. | Reason for the notification | |||||||||||||
| a) | Position/status | Member of the Board of Directors | ||||||||||||
| b) | Initial notification/Amendment | Amendment to Company Announcement no. 13 of March 2, 2026 | ||||||||||||
| 3. | Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor | |||||||||||||
| a) | Name | Genmab A/S | ||||||||||||
| b) | LEI-code | 529900MTJPDPE4MHJ122 | ||||||||||||
| 4. | Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted | |||||||||||||
| a) | Description of the financial instrument, type of instrument Identification code | Share DK0010272202 | ||||||||||||
| b) | Nature of the transaction | Acquisition due to vesting of restricted stock units (as employee of Genmab A/S) | ||||||||||||
| c) | Price(s) and volume(s) | Price(s) | Volume(s) | |||||||||||
DKK 1,867.50 | 197 | |||||||||||||
| d) | Aggregated information - Aggregated volume - Price | 197 shares DKK 1,867.50 | ||||||||||||
| e) | Date of the transaction | 2026-03-02 | ||||||||||||
| f) | Place of the transaction | Outside the market | ||||||||||||
| Genmab A/S Carl Jacobsens Vej 30 2500 Valby, Denmark | Tel: +45 7020 2728 www.genmab.com | Company Announcement no. 14 Page 4/6 CVR no. 2102 3884 LEI Code 529900MTJPDPE4MHJ122 | ||||||

| 1. | Details of the person discharging managerial responsibilities / person closely associated | |||||||||||||
| a) | Name | Michael Kavanagh | ||||||||||||
| 2. | Reason for the notification | |||||||||||||
| a) | Position/status | Member of the Board of Directors | ||||||||||||
| b) | Initial notification/Amendment | Amendment to Company Announcement no. 13 of March 2, 2026 | ||||||||||||
| 3. | Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor | |||||||||||||
| a) | Name | Genmab A/S | ||||||||||||
| b) | LEI-code | 529900MTJPDPE4MHJ122 | ||||||||||||
| 4. | Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted | |||||||||||||
| a) | Description of the financial instrument, type of instrument Identification code | Share DK0010272202 | ||||||||||||
| b) | Nature of the transaction | Acquisition due to vesting of restricted stock units (as employee of Genmab US, Inc.) | ||||||||||||
| c) | Price(s) and volume(s) | Price(s) | Volume(s) | |||||||||||
DKK 1,867.50 | 305 | |||||||||||||
| d) | Aggregated information - Aggregated volume - Price | 305 shares DKK 1,867.50 | ||||||||||||
| e) | Date of the transaction | 2026-03-02 | ||||||||||||
| f) | Place of the transaction | Outside the market | ||||||||||||
| Genmab A/S Carl Jacobsens Vej 30 2500 Valby, Denmark | Tel: +45 7020 2728 www.genmab.com | Company Announcement no. 14 Page 5/6 CVR no. 2102 3884 LEI Code 529900MTJPDPE4MHJ122 | ||||||

| Genmab A/S Carl Jacobsens Vej 30 2500 Valby, Denmark | Tel: +45 7020 2728 www.genmab.com | Company Announcement no. 14 Page 6/6 CVR no. 2102 3884 LEI Code 529900MTJPDPE4MHJ122 | ||||||