GSK Stockmann is a leading independent European corporate law firm with deep expertise in funds, financial services, mobility, energy, data centers, infrastructure, real estate, capital markets, and public law. With offices across Berlin, Frankfurt, Hamburg, Heidelberg, Munich, Luxembourg, and London, the firm offers a full service approach and is recognized for delivering pragmatic, business-oriented legal advice to both international and domestic clients.

Due diligence is one of the most resource-intensive aspects of transactional law. Teams routinely review hundreds of contracts and supporting documents under tight deadlines, where both accuracy and speed are paramount. More than 60% of lawyers at GSK Stockmann have frequent touch points with due diligence procedures. Traditional manual review consumes significant lawyer time and constrains capacity for higher-value strategic advisory work.

Recognizing this, GSK Stockmann identified generative AI as a way to rethink and streamline the entire complex process. With the goal of an end-to-end AI-enabled due diligence process, GSK Stockmann achieves key objectives, including:

The firm’s leadership took a pragmatic approach, focusing AI implementation on those elements of the due diligence workflow where it could drive the greatest value first.

To fast-track transformation, GSK Stockmann hosted a week-long offsite with Harvey in August 2025 in the Bavarian Alps, creating an immersive setting free from billing pressures to design and prototype new approaches. In preparation, a series of interviews with clients were conducted to ensure client expectations, questions, pain points, and potential gains were addressed with the new due diligence solution.

Together, GSK Stockmann and Harvey co-designed a set of generative AI workflows tailored for the corporate and real estate due diligence process with a number of key insights and innovations delivered. This not only included document review prompts, but the entire due diligence process from scope determination through to report delivery. Next to legal review-specific prompts, the overall process has been redesigned and enhanced with AI prompts and new workflows.

Conditional Workflows

AI checks were developed to discover missing documents, request additional items from target companies, and guide users step-by-step — eliminating wasted searches across hundreds of poorly organized files that were received in a data room.

Human-in-the-Loop

In conjunction with GSK Stockmann’s Proprietary Prompting engine and Harvey’s platform, surface risks were flagged leveraging Harvey’s citation engine, and lawyers were able to rapidly validate, iterate and categorize them, ensuring high levels of accuracy and trust. By inserting lawyer review — the human in the loop — as part of an AI-augmented workflow, GSK Stockmann and Harvey are able to drive a more collaborative experience between the lawyer and AI toolset, while reducing the chance of errors of AI over-dependency and ensuring correct results.

Web Search

Beyond the client’s data room, Harvey connected to statutory and regulatory databases, public disclosures, and web sources, surfacing external risks (e.g., regulatory fines, reputational red flags).

Workflow Playbooks

The Harvey team also collaborated with GSK Stockmann to introduce contextual inputs to ensure result accuracy. This included a system prompt that factored in details such as company size, jurisdictions, and debt facilities — front-loaded into the workflow to deliver tailored, precise outputs. For example, compliance reviews were tailored based on company size, ensuring the right regulatory checks were triggered and potential gaps flagged.

Embedding Harvey into GSK Stockmann’s due diligence process produced measurable results:

In addition to the outcomes highlighted above, the offsite also surfaced several important lessons:

Transforming a core legal process takes more than technology, it takes trust. Trust built through months of collaboration — and strengthened at the offsite — opened the door to honest dialogue, real feedback and, ultimately, a new way of working. Participants felt the offsite’s impact immediately. Here’s what they had to say:

“An inspiring week together, full of innovative ideas and insights at the AI Innovation Camp. This experience has set new impulses for the future and sparked curiosity for more.”

“After four months of preparation, we did it: a digital DD process that doesn’t just exist on paper. It was great to see how everyone got involved and made the week a success!”

In just one week in the Alps, our GSK team used Harvey to automate tax due diligence reports — showing how collective energy can turn cutting-edge AI in a rural setting into an inspiring, highly productive endeavor.”

“Between sunrise summit jumps and site power, together with the specially flown-in Harvey team, we tamed project "Springbok" and laid the AI foundation for the DD process — now the prompts are jumping!”

GSK Stockmann views Harvey as a strategic tool to refine due diligence and expand into compliance, regulatory checks, contract negotiation, and business development. With Harvey’s suite of tools, the firm envisions hundreds of tailored workflows per domain, scaling efficiency, improving quality, and embedding AI as part of its DNA so lawyers spend less time on mechanical tasks and more on strategic work, trusted advisory, and client service delivery.