Robinhood, a stock and cryptocurrency trading platform, stated that on the evening of November 3, an intruder entered the company’s system and stole the personal information of millions of users. The full names of the users, the names of about 310 users, the date of birth and postal code were leaked, and the more detailed account information of about 10 users was leaked. The intruder demanded blackmail for payment. The company notified law enforcement and continued to investigate the incident with the help of the external security company Mandiant. Robinhood stated that the attack had been contained. Robinhood believed that it did not expose social security numbers, bank account numbers or debit card numbers, and did not cause any economic losses to customers due to the incident.