A common question to put to an AI assistant is "what did this fund buy last quarter? ", and the answer comes from Form 13F-HR. I build Equibles , which has an MCP server that answers it.
Source: [Dev.to](https://dev.to/daniel_oliveira_4bd55d35d/diff-two-13f-filings-by-cusip-and-check-an-ais-what-did-berkshire-buy-answer-7ad)