Background: Corporate social responsibility (CSR) reports are essential for companies to persuade stakeholders of their commitment to social, economic, and environmental responsibilities. This persuasion is to a large degree determined by how companies construct their stance in discourse. Literature review: Among efforts in academic discourse, stance analysis of shipping industry CSR reporting remains unexplored. Research questions: 1. How are stance resources distributed in COSCO Shipping and Maersk's CSR discourse? 2. How do similarities and differences between institutional speakers instantiate their stakeholder-oriented communication strategies? 3. Which stance markers show significant changes over time, and what factors drive these changes? Methodology: This study employed corpus linguistics and discourse analysis of CSR reports (2016-2022) of COSCO Shipping and of Maersk. Python and WordSmith 8.0 were used for stance feature retrieval and frequency analysis, and hierarchical clustering analysis was conducted on hedges and boosters. Chi-square tests evaluated differences in stance marker distribution, while diachronic analysis examined changes over time. Results and conclusion: Maersk employs more stance markers of hedges, attitude markers, and general self-mentions, reflecting a more personal communication style, while COSCO Shipping favors boosters and formal self-references, indicating an authoritative approach. We argue that these features are informed by the contrast between European rationalism and Eastern empiricism in corporate communication. Our novel four-category classification of self-mentions (general, specific reference, group, and affiliated) addresses the complexities of shipping corporate discourse. Diachronic analysis shows stance marker usage fluctuations, particularly during global events like the COVID-19 pandemic. These findings develop a stance framework, offering insights in terms of stance construction for effective cross-cultural CSR communication to foster global cooperation on shared social responsibilities.