How a specialty insurer closed the private-company ESG visibility gap with Veridion.

ESG ratings cover only 20% of the book

The customer writes specialty commercial insurance through syndicates and retail subsidiaries across the UK, US, Europe, and Asia. The line of business that drove the engagement is sustainability-linked underwriting, an ESG sub-syndicate writing only against clients with strong ESG credentials, plus broader sustainability-aligned products across the wider commercial book.

The data foundation for that product line had a structural ceiling. Public-company ESG ratings exist. The customer had been using a major incumbent ratings provider for the listed-company portion of the book. But the listed segment is roughly 20% of the eligible market. The other 80% (the private companies, SMBs, and mid-market businesses that make up most of a commercial-insurance portfolio) sits outside the listed-company ratings universe entirely. Across the major ESG ratings agencies, total covered listed companies number fewer than 20,000 in aggregate; commercial-insurance underwriters need to see the long tail of operating companies that doesn't appear in any of those agencies.

The second constraint was reinsurance defensibility. Black-box ESG scores (a number without an evidence chain) don't pass reinsurer review when a sustainability-linked product depends on the rating. The customer needed scores its reinsurer would accept, with the justifications attached.

The brief was to extend ESG underwriting visibility across the 80% private-company portion of the book, with explainable scores that hold up to reinsurer and regulatory review.

Four modules with evidence on every score

Veridion's ESG data package now feeds the customer's sustainability-linked underwriting flow as four independently-consumable modules sitting on top of the company knowledge graph: ESG Scores, ESG News, ESG Commitments, and GHG Metrics including Carbon Reduction Plan extraction.

The Scores module returns an overall 0-100 rating per company plus a breakdown across three pillars and twenty-six UNEP FI risk criteria, each carrying a justification string. The News module surfaces ESG-tagged events with sentiment classification, theme tagging, source URL, and confidence scores. The Commitments module extracts ESG-policy text verbatim with the source URL the commitment was drawn from, so a sustainability claim never enters underwriting unattributed. GHG Metrics adds Scope 1, 2, and 3 figures where companies disclose them, plus reduction targets and Carbon Reduction Plan extracts from the source documents.

Every score, every signal, every metric carries an evidence chain: the justification string for the score, the source URL for the news event, the verbatim text for the commitment, the source document for the emissions number. The same explainability that gives the customer's underwriters a defensible audit trail is what its reinsurer reviewed and endorsed.

The 4-module package runs on the same 134M+ operating-company graph the rest of Veridion's stack feeds from, with weekly refresh on the core graph. The UNEP FI taxonomy crosswalks underneath provide alignment to CSRD ESRS themes, EU Taxonomy activities, and other live regulatory frameworks, so the same scores serve underwriting decisions and downstream regulatory filings.

Eligible universe grew 2-3x, reinsurer endorsed

The work expanded the customer's eligible-company universe for sustainability-linked products by 2-3x. The 80% private-company visibility gap on the commercial book closed. The methodology was reviewed and endorsed by the customer's reinsurer, clearing the defensibility bar that black-box scores hadn't.