Nonprofit leaders face a rapidly shifting environment as year-end giving surges, regulatory pressures intensify, and new human-resources, IRS, and state-level developments reshape operational priorities. This week’s Navigator Update highlights record-breaking Giving Tuesday results, the critical importance of December fundraising, major federal compliance shifts, workforce trends, Form 990 deadlines, new retirement plan limits, and emerging state-level risks involving security funding, DEI pressures, and litigation threats. This comprehensive briefing consolidates real, verifiable developments nonprofit executives must monitor to protect funding streams, maintain compliance, and guide strategic planning in a volatile 2025–2026 landscape.s.