The First 100 Days: When Accountability Rises Faster Than CEO Authority

In many Flemish professional services firms, the first 100 days after a Private Equity transaction are treated as an integration phase. Reporting lines are reviewed. Priorities are reset. Synergies are mapped. Progress is tracked.

But the real shift is not operational.

It is structural.

What changes first is not always execution. It is accountability.

Under Code Buysse IV, directors of non-listed Belgian firms carry explicit duties of care and diligence. Board oversight becomes more formal. Expectations are documented more precisely. Performance is monitored more closely. Governance tightens quickly after the deal.

CEO authority does not always consolidate at the same speed.

That gap matters more than most integration plans acknowledge.

In newly consolidated groups, legacy dynamics remain influential. Former partners often continue to exercise local authority. Decision rights are assumed rather than explicitly defined. Group priorities compete with offices or business units that have operated autonomously for years.

In a Buy-and-Build structure, that is where mandate starts to fragment.

The CEO is expected to deliver integration, alignment and performance. Yet in practice, control over key decisions may still be shared, bypassed or informally contested.

That is the real risk of the first 100 days:

Accountability rises faster than authority.

And when that happens, the CEO can become fully accountable for outcomes without holding the full mandate to shape them.

By Day 100, the decisive question is not whether the integration plan was executed on paper.

The decisive question is whether the organisation can clearly answer four governance questions:

— Which decisions remain local
— Which decisions sit at group level
— Which decisions belong exclusively to the CEO
— How disagreement between board and CEO is handled before it turns political

If those boundaries remain unclear, execution does not simply slow down.

Decision velocity drops.
Escalations become informal.
Local power centres regain influence.
Board members start engaging below CEO level.
Strategic priorities are discussed, but not consistently enforced.

At that point, authority has already started to shift informally.

The consequences rarely appear immediately in reporting. They tend to surface later through delayed synergies, internal misalignment, slower execution, politicised governance and growing doubt about leadership effectiveness.

This is why a 100-day plan is not enough.

A 100-day plan structures activity.
It does not establish mandate.

Mandate requires explicit agreement between board and CEO. It requires clarity on decision rights, escalation paths, operating boundaries and the points at which board oversight ends and executive authority begins.

If that clarification is postponed, the first 100 days do not create alignment.

They create the conditions for an ongoing negotiation about who really decides what.

In work with CEOs after Private Equity entry, that negotiation is rarely a personality issue. It is usually a governance design issue.

And once mandate and authority no longer fully align, early intervention is far more effective than late correction.

If this pattern may be emerging in your group, a confidential diagnostic conversation can clarify whether mandate misalignment is already affecting execution, and what early intervention would require.