Building productive relationships with regulatory authorities is essential for small biotech companies to reduce development risk and accelerate timelines. By engaging early, preparing thoughtfully, and partnering with experienced CROs, companies can foster trust-based interactions with global regulators. Navigating the differing requirements of international regulatory bodies requires careful planning, transparent communication, and a clear understanding of jurisdiction-specific expectations. Avoiding common missteps—such as withholding data, arriving unprepared, or taking a defensive stance—can protect long-term regulatory relationships and support approvability. Selecting the right CRO partner with both technical expertise and strategic insight is a critical enabler of regulatory success.