Here is the full list of all 10 Interstellar Transport Company achievements.
Build a colony
Have $1,000,000 in cash
Have $10,000,000 in cash
Have $100,000,000 in cash
Transport 1,000,000,000 humans
Have one of your colonies reach 100% development
Send a ship to another solar system
Play a game to the 10 year milestone
Play a game to the 25 year milestone
Play a game to the 50 year milestone