Chronologically, event by event: the share purchase agreement, the closing statement, the trust ledger showing receipt and disbursement, the holdback agreement and its release, each bank statement the money touched, and each currency conversion confirmation. The chain must be unbroken from sale to investment.
Building the chain
Start with the document that created the wealth, the share purchase agreement, and attach the closing statement that shows the price, the adjustments and the amount held back. Obtain the lawyer's trust ledger for the transaction; it is the record most founders forget and the one that explains why the proceeds did not arrive in one transfer. Then the holdback agreement and the letter or statement showing its release, followed by every personal bank statement between receipt and the day the EB-5 subscription is funded.
Where Canadian dollars were converted to U.S. dollars, include the conversion confirmation so the amounts reconcile. If some proceeds were used for other purposes, show that too, because the petition traces the specific funds invested, not the founder's net worth.
Tax filings for the sale year corroborate the source. Do not summarize any step in a narrative when the underlying document can be produced; the narrative explains the documents, it does not replace them.