100-Day Communications Post-Merger Integration Plan
Covers all Communications activities from pre-close through Day 100 (Integration Complete). Accompanying reports — Day 1 Checklist, RAID Log, Milestones, Next 14 Days, and Executive Dashboard — reflect progress as of T+30 (30 days post-close)
Day 1 helps launch the story, but the next 100 days determine whether people believe it. This 100-Day plan guides the Communications workstream through that transition, shifting from the intensity of Day 1 to the steady work of reinforcing trust, maintaining alignment, and ensuring every audience continues to hear one clear, consistent message.
The heart of the plan is a cadence of communications. Weekly employee updates, monthly customer communications, and quarterly investor briefings keep stakeholders informed long after the close announcement fades. Regular milestone messages reinforce progress, sustain confidence, and reduce uncertainty.
At the same time, the new brand becomes visible across the organization. Every digital and physical touchpoint is updated, and employees receive a transition kit with new email signatures, LinkedIn templates, and brand resources.
The work then shifts to tracking audience sentiment and message penetration. The real measure of the success of the Communications' workstream is whether employees, customers, investors, and partners understand the company's direction and trust its leadership.