GICS sorts public companies by a rule venture labels lack

The record

The Global Industry Classification Standard (GICS) is a company classification system MSCI and S&P Dow Jones Indices jointly developed in 1999 and continue to govern together. The joint GICS Methodology document, dated 7 January 2023, describes a four-level hierarchy of "11 Sectors, 25 Industry Groups, 74 Industries, and 163 Sub-Industries," with every company assigned exactly one classification at each level. The assignment rule is explicit: "a company is classified in the Sub-Industry whose definition most closely describes the business activities that generate more than 60% of the company's revenues," with earnings and market perception used only as secondary considerations when no single activity clears that threshold.

What the sources establish

GICS is a rules-based, jointly governed classification applied to companies that have issued public equity securities, maintained through what MSCI's own GICS overview page, retrieved 16 September 2026, describes as an annual review process "to ensure it remains fully representative of global market dynamics." The methodology document adds that structural changes go through a documented Structure Review governed jointly by both firms, citing as its most recent major example the creation of a standalone Real Estate sector carved out of Financials and the renaming of Telecommunication Services to Communication Services. By contrast, a private-market data provider's sector or vertical label for a startup is typically assigned by that provider's own research staff, often from limited disclosure, without a public numeric revenue-share rule comparable to GICS's 60% test.

Scope and revision

GICS applies to companies "that have issued equity securities," per the methodology document's own outline, a scope limited to the public-market use case the document was built for; the same document separately addresses corporate bond issuers under a distinct fixed-income section rather than folding them into the equity structure. The document is versioned and dated, this trace cites the edition published 7 January 2023, and MSCI's overview page confirms the structure is revisited annually, meaning a sub-industry definition current today may not match an older GICS edition cited elsewhere without checking the version.

The decision in front of you

An analyst comparing a private company's provider-assigned sector to a public comparable set should confirm which GICS sub-industry the public peers actually sit in, using the revenue-share rule rather than assuming the labels line up, and should treat any private-market sector tag as that provider's own judgment call rather than a GICS-equivalent classification. This is an editorial practice for building a defensible comp set, not an instruction from MSCI or S&P Dow Jones Indices. Checking the GICS edition date behind a public comp set is a small step that avoids comparing companies classified under two different structural vintages.

• Does the private company's provider-assigned sector label state a comparable revenue-share rule, or is it a judgment call?
• Which GICS sub-industry, specifically, do the public comparables sit in, and does it match the private company's actual revenue mix?
• Which GICS structure edition is being used, given the classification is revisited annually?

A GICS sub-industry code and a venture provider's sector tag can look interchangeable in a slide, but only one of them is built on a disclosed, numeric rule.