Van Oers and HLB Den Hartog Merge to Strengthen Regional Accounting Presence

Van Oers and HLB Den Hartog have agreed to merge, combining their strengths to better serve clients in the economically significant Rotterdam and The Hague regions. The transaction, described as a ‘samengaan’ or coming together, focuses on uniting Van Oers’ broad expertise with HLB Den Hartog’s deep local knowledge and network.

While no financial terms were disclosed, the merger is positioned as a strategic move to enhance service quality, accessibility, and continuity for clients. Both firms emphasize that the core of their client relationships—personal attention and trusted advisory—will remain unchanged, even as they expand their reach and capabilities.

HLB Den Hartog employs around 80 people, while Van Oers has approximately 500 staff. Over the past year, Van Oers held the 21st position in the Accountancy Vanmorgen Top-50 ranking. The combination creates an accounting firm of nearly 600 people, with offices spanning from the western Randstad to East Brabant.

Van Oers has built its reputation on close relationships with entrepreneurs, families, and organizations, delivering personalized and long-term advisory services. HLB Den Hartog, a well-established accounting firm rooted in the Rotterdam and The Hague area, brings a strong regional network and local market insight.

The merger aims to address the increasing complexity faced by businesses and organizations, where demand for expert, reliable, and accessible advice continues to grow. By joining forces, the combined entity will leverage economies of scale, share knowledge more effectively, and enhance responsiveness through a stronger local presence.

Strategically, the merger strengthens Van Oers’ footprint in key economic hubs, allowing cross-selling of advisory and accounting services to a broader client base. It also supports talent development and retention by offering expanded career opportunities within a larger organization committed to quality and involvement.

Industry consolidation is accelerating in the accounting sector, particularly in regional markets. This merger positions Van Oers and HLB Den Hartog to better compete against peers by combining complementary expertise and operational efficiencies. Competitors in the Rotterdam and The Hague regions may face increased pressure as a result.

Integration challenges include aligning corporate cultures while preserving the firms’ client-centric approach, maintaining service continuity, and harmonizing IT and operational systems. Both firms acknowledge these risks but emphasize their commitment to a smooth transition.

Looking ahead, the merged firm plans to deepen its expertise, expand specialized service lines, and continue investing in client relationships. This step reflects a deliberate choice for sustainable growth that maintains proximity to clients and colleagues alike.