The short answer
Custom software for private equity and holding companies connects portfolio companies after acquisition and builds the shared tools they need, such as system integrations, a portfolio data platform, shared services applications, and customer or partner portals. It lets companies work together without forcing a costly replacement of every system at once.
Where portfolio systems get in the way
Acquisitions combine businesses faster than their systems can follow.
- Add-ons that stay disconnected. Each acquired company keeps its own systems, so shared services stall.
- No common data layer. Reporting and analysis depend on manual exports from every company.
- Shared services without tools. Centralized teams work across companies using spreadsheets and email.
- Customer experience that varies by company. Customers buying from several portfolio companies get several different experiences.
$3.8 trillion
Value of the roughly 32,000 unsold companies held in private equity portfolios as of mid-2025, according to Bain and Company. Bain & Company, Global Private Equity Report 2026
Many of those companies were built through add-ons, and connecting their systems is often what turns a collection of businesses into a platform worth more at exit.
What custom software looks like for portfolio companies
Post-acquisition integrations
Customers, orders, and financials synced between acquired companies and the platform.
Portfolio data platform
A shared data layer that feeds reporting across every company.
Shared services tools
Applications for centralized finance, HR, or procurement teams working across entities.
Unified customer portals
One place for customers to order and track across portfolio companies.
Integrate now or consolidate later?
The right answer depends on the hold period and the value of integration.
| Approach | Best when | Watch out for |
|---|---|---|
| Integrate key flows | Fast value is needed | Too many point-to-point connections |
| Shared data platform | Reporting and analysis are priorities | Inconsistent definitions |
| Full consolidation | Long hold and deep integration | Long timelines and disruption |
Acquired a company whose systems still do not talk to yours? Book a working session.
How an engagement starts
We map the systems at each company and the flows that matter most for the value creation plan, such as orders, customers, or financials. That identifies the integrations worth building first.
Then we build in stages, starting with the highest-value connection, and add a shared data layer for reporting as companies come on board. See how we work.
Frequently asked questions
Should portfolio companies be moved onto one ERP after acquisition?
Not always. Full consolidation takes time and carries risk, which may not fit the hold period. Integrating key flows and building a shared data layer often delivers most of the value sooner. Consolidation makes sense when deep integration is central to the plan and time allows.
What is a portfolio data platform?
It is a shared data layer that collects financial and operational data from each portfolio company, maps it to common definitions, and feeds consolidated reporting. It lets the holding company see across businesses without replacing their individual systems.
How long do post-acquisition integrations take?
A single integration between two systems can take weeks to a few months, depending on the systems and data quality. Larger integration programs are delivered in stages, so the most important flows, such as financials or orders, are connected first.
Who owns the software built for a portfolio company?
Ownership should be agreed before the build. Usually the portfolio company or holding company owns the code and documentation, so it can be maintained by any provider and transferred cleanly at exit. Clear ownership also helps during buyer diligence.
Can custom software support an exit?
Yes. Clean integrations, a shared data platform, and documented systems make it easier to show buyers how the business operates and performs. Buyers also value platforms that can absorb further add-ons without major rework or new systems.
