What should sponsors include in an annual investor letter?

An annual letter should synthesize the year into a durable investor record rather than repeat four quarterly updates. For sponsors, reporting leads, fund administrators, and investor relations teams, the practical answer is to treat the question as part of period close, capital account reconciliation, valuation support, investor communication, governance notices, and follow-up tracking, not as a one-off definition. The record should show financial statements, capital accounts, valuation marks, portfolio commentary, notices, LPAC records, investor Q&A, and delivery logs so an investor, lender, counsel, administrator, or operating lead can reconstruct the decision later. Connect the letter to audited or year-end records, capital account movement, material portfolio events, and forward-looking priorities that management can actually own. The common failure mode is writing a broad narrative that does not reconcile to numbers, misses difficult issues, or fails to explain what the sponsor will do next.