Improving the Completeness and Comparability of Segment Disclosures: A Large Language Model Approach

Yue Liu; Zhiyuan Cheng; Longying Lai

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arXiv · 2605.23924

Improving the Completeness and Comparability of Segment Disclosures: A Large Language Model Approach

Yue Liu·Zhiyuan Cheng·Longying Lai

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Abstract

Segment-level disclosures are a central component of financial reporting, providing insight into firms' internal organization and the allocation of economic activities across operating units. However, segment information is often presented in both qualitative and quantitative forms, dispersed across tables and narrative sections of Form 10-K filings. Empirical research relying on structured databases faces both completeness and comparability challenges, as some firm-year observations may be missing, nested segment disclosures are not captured, and support for longitudinal and cross-firm comparability is limited. This study develops a large language model-based framework to extract segment disclosures directly from Form 10-K filings and to preserve both reportable and nested segment information. We further design a retrieval augmented system that incorporates information across multiple filings to support comparability. We use two representative settings to demonstrate its application: longitudinal analysis within a firm to interpret segment changes over time, and cross firm alignment of geographic segments across firms with different reporting structures. The results indicate that the artifact accurately extracts segment-level information and effectively addresses questions that require cross-period knowledge, demonstrating the potential of LLM-based approaches to enhance the measurement and interpretation of segment disclosures.

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Yue Liu, Zhiyuan Cheng, Longying Lai. 2026-04-20. Improving the Completeness and Comparability of Segment Disclosures: A Large Language Model Approach. https://arxiv.org/abs/2605.23924

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