回复：我是加拿大公民同时I１４０已得到批准，现持公司H１B。现在我想换一家公司，可行吗？因为我听说今年的H１B都已经用完了。谢谢

Yes, you can, but you can not use the approved I-140 to file I-485 in the future unless your current employer agree to hire you back after you get the green card. You can do H-1 transfer and do not need a new H-1 quote.