Long non-coding RNAs (lncRNAs) play critical regulatory roles in primate-specific biological processes, yet many primate-specific lncRNAs and their protein interactors remain poorly characterized. In this study, we focused on primate-specific lncRNAs as potential drivers of protein interactions. Using RNA affinity pull-down coupled with liquid chromatography-tandem mass spectrometry (LC-MS/MS), we identified proteins interacting with LINC01021 in primate-derived cells. Key findings include specific enrichment of RBMS proteins, suggesting a functional role in RNA metabolism or gene regulation. This dataset provides proteomic evidence for primate-specific lncRNA-protein interactions and contributes to understanding evolutionary adaptations in primates.