From what schools, from what companies?

I went to Harvard, so most of the examples I know are from Harvard at the common hot employers. I know of some examples from other schools, though. It's also often the case that not all hires get a six figure signing bonus at a particular company from a particular school, but just some of the people at the top of the pay spectrum.

But is this in tech? I know several people who have gotten these type of offers but they have almost all be exclusively in the financial sector. And even more so in trading type positions as quants or analysts.

Yes, in tech. Your typical Googamafacesoft type companies. There are people with similar offers in finance, but they're not to whom I was referring in the earlier comment.

Off-topic: Any advice for a business school hopeful? I'm a financial analyst for a tech company but want to move into management/strategy consulting.

Cash or vesting equity?

The 100k was in reference to cash. I know people who have gotten up to $500k in vesting equity upon graduation.