The 4th edition of the conference took place on 18-20th May 2019 at Campus Albano, the new home of Stockholm Business School in Stockholm, Sweden. The conference once again brought together an impressive line-up of researchers from around the world to discuss the fundamentally important topic of information in financial markets. After two virtual editions, it was a great pleasure to welcome participants in person again, while maintaining the possibility for everyone to attend remotely. The hybrid format proved successful and is likely to serve as a template for future editions. The event was funded by a research grant from Handelsbankens Forskningsstiftelser.