The GDPR (in Article 15(4)) states that the right to obtain a copy of your personal data should not ‘adversely affect the rights or freedoms of others’. This means that when responding to an access request, the controller should consider the rights of third parties, such as their data protection rights, trade secrets, or intellectual property rights such as copyright. This could arise, for example, where your access request relates to a record containing both your personal data but also the personal data, trade secrets, or intellectual property of others.
A balancing of rights exercise would need to be conducted by the controller to balance your right of access your personal data as against the identified risk to the third party that may be brought about by the disclosure of the information. The GDPR notes that these considerations should not result simply in a refusal to provide all relevant information, but the controller should endeavour to comply with the request insofar as possible whilst also ensuring adequate protection for the rights and freedoms of others.