We saw a spate of technology companies filing for IPO this week. They include:

• Asana, a project management tool;

• Snowflake, which helps companies handle large volumes of data;

• Unity, makes of 3-d gaming technologies;

• Corsair Gaming, which makes accessories for video games and live-streamers;

• JFrog, which makes developer tools;

• Palantir, a government contra…