Affinity group holding refers to a financial holding company that specifically invests in businesses related to a particular industry or niche. There are several synonyms for the term, including sector-specific holding company, industry-focused investment vehicle, thematic investment company, and specialized investment firm. These synonyms underline the fact that affinity group holdings are designed to cater to clients with specific interests or expertise in a particular sector. Such companies are often established to address the unique needs and demands of a particular marketplace, and may provide strategic support, operational expertise, and capital to help businesses within the industry to grow and succeed.