Building a PDF Parser for Financial Data: Lessons from Arbiter V2

📰 Dev.to AI

Learn how to build a PDF parser for financial data using regex, and understand the trade-offs between regex and ML for extraction

intermediate Published 1 May 2026
Action Steps
  1. Build a PDF ingestion system using a library like PyPDF2 or pdfminer
  2. Configure regex patterns to extract relevant financial data from PDFs
  3. Test and refine the regex patterns to improve accuracy
  4. Compare the performance of regex and ML-based extraction methods
  5. Apply the chosen method to a real-world financial data parsing task
Who Needs to Know This

Data scientists and software engineers can benefit from this lesson to improve their PDF parsing skills, especially when working with financial data

Key Insight

💡 Regex can be a suitable choice for extracting financial data from PDFs, especially when the format is consistent

Share This
📊 Extract financial data from PDFs using regex! 🤖 Learn from Arbiter V2's experience and improve your PDF parsing skills #pdfparsing #financialdata

Key Takeaways

Learn how to build a PDF parser for financial data using regex, and understand the trade-offs between regex and ML for extraction

Full Article

I’m Matthew, building Arbiter Briefs — an AI engine that helps founders make high-stakes decisions. This week we shipped financial PDF ingestion, and I want to walk through the architecture, the gotchas, and why we chose regex over ML for extraction. The Problem Our v1 was generating rulings based on web research + user input. But founders kept saying the same thing: “This would be way more useful if you actually read my financial data.” So we added PDF upload. But now we had a ne
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