Company sustainability information and reports come in all shapes, sizes and styles. Generally, the reports will (well, should!) focus on environmental impact, communities, ingredients or material sourcing and packaging.
Lots of companies will publish information on their website instead of formal PDF or physical reports. Their reports should easily be found on the company website or through a search engine.
The level of detail varies. The bigger the company, the more complex the information generally is. Some companies actually publish f*ck all but publishing more doesn’t necessarily mean they’re better, it just means they’re publishing something. It's a good start but it doesn't mean the content is good news!
Companies that are owned by bigger companies will usually leave it to the big company to do the reporting for them - so you won’t find out much on the small company’s website in these cases. Big companies that own other companies might mean they're less sustainable, due to their size and scale of production.
The most advanced sustainability strategies will have:
1. Science-Based Targets.
2. TCFD (The Task Force on Climate-Related Financial Disclosures).
3. Integrated Report (includes finances and sustainability combined and not in separate reports).
Example Reports (not necessarily good or bad ones!)
Innocent drinks: https://www.innocentdrinks.co.uk/us/sustainability
Deliciously Ella: https://deliciouslyella.com/sustainability/