It is tied to a company (and job description, and location). Any change in those requires amending/transferring the H1B, even just switching locations within the same company.
I found this out the hard way when I accidentally gave the lawyers my company's headquarters address instead of the office where I would be working. They're like 35 miles apart but that still required an amendment.
Plus while on H1B I can't sell a mobile app, or monetize a Youtube channel (things I could of course do if I were living in my home country), or even rent a room on AirBnB, as my visa restricts me to income from my sponsoring employer. Luckily I should have a green card soon.
I found this out the hard way when I accidentally gave the lawyers my company's headquarters address instead of the office where I would be working. They're like 35 miles apart but that still required an amendment.
Plus while on H1B I can't sell a mobile app, or monetize a Youtube channel (things I could of course do if I were living in my home country), or even rent a room on AirBnB, as my visa restricts me to income from my sponsoring employer. Luckily I should have a green card soon.