Don't just hand an integration plan to functional leaders post-close. Involve them early in the process as co-architects. Their input is crucial for validating financial models and strategic assumptions, ensuring realistic expectations and fostering ownership of the deal's success.

The firm's M&A success, marked by 93% cumulative leadership retention over 55 deals, hinges on preserving the target's operational autonomy post-close. They don't buy 'fixer-uppers,' instead empowering leaders to continue the practices that made them successful, which is as critical as initial cultural screening.

To ensure Day 1 alignment and retain key talent, treat integration planning as a collaborative process. Share the developing integration plan with the target's leadership during due diligence. This allows them to validate assumptions, provide critical feedback, and feel like partners in building the future company, rather than having a plan imposed on them.

Instead of arriving with a rigid 100-day plan, CPC advises using the initial post-acquisition period to build trust. The management team is exhausted from the sale process. Forcing immediate, top-down changes is a mistake; the priority should be establishing vulnerability and mutual understanding for long-term success.

A stated M&A strategy is only a hypothesis. To validate it, present the leadership team with actual potential targets that fit the criteria. Their reactions will reveal their true appetite and expose any misalignment between the written strategy and their operational instincts, saving time and effort.

On Day 2 post-close, Milliken's strategy team partners with the acquired company's leadership to co-develop a new 7-year strategic plan. This practice validates the diligence thesis while creating immediate buy-in and alignment around a shared long-term vision.

Before an LOI, share your high-level vision, then have the target's founders pitch back their own 6- and 12-month post-acquisition roadmap. This pre-commitment exercise reveals true alignment and integration potential far more effectively than traditional diligence, creating a joint vision early on.

To keep high-performers, beyond giving them equity, you must explicitly map out their trajectory. Galloway advises sitting down with employees to define their position, responsibilities, and financial standing three years into the future. This clarity on growth and demonstrated investment in their success is highly "intoxicating" for ambitious individuals.

The primary focus for a new portfolio company leader in the first 100 days should be on three pillars. First, align the company's plan with the PE firm's thesis. Second, ensure the right executive team is in place. Third, establish reliable data and KPIs to measure progress.