It is reported TRON will launch virtual machine on May 25 (UTC+8), mainnet on May 31, token migration on June 21, and the first 27 super representative elections on June 26. With this date approaching, today, stocks.exchange announced that it would support the TRON blockchain upgrade and token migration. Investors only need to deposit TRX’s ERC-20 tokens to stocks.exchange before June 24th in 2018 (UTC+8) and will receive the equivalent TRX token after mainnet launch. No transaction is affected during the migration.
Stocks.exchange allows users to trade assets of your company for cryptocurrency. The platform facilitates the circulation of cryptocurrencies through crypto-based instruments and the determination of their market prices. Our platform maintains a high level of professional security for your personal data.

Here is what you should know about TRX migration: https://medium.com/tron-foundation/guide-to-independence-trx-token-migration-269302b6655c