According to Forbes, the US Vegan Climate Index excludes companies listed on the Solactive US Large Cap Index (a proxy for the S&P 500 Index) that are involved in animal testing, animal-derived products, animals in sport and entertainment, fossil fuel, energy production from fossil fuel, other environmental and human rights concerns, military and defense, and tobacco. See:
https://www.forbes.com/sites/katrinafox/2018/05/23/new-stock-index-makes-it-easier-for-vegans-and-environmentalists-to-invest/#7e876c557a2e