Formal word/phrase for "in one big move"

I'm working with the sentence:

The company raised over $1 billion, __________ placing it in the top band.

I initially considered "in one fell swoop" but this seems to be a stretch, typically the idiom is used to describe doing multiple things at once. Moreover, it's too casual for my application.

What formal choices might work here? (can change conjugations of my existing words around if necessary)

You might want to try instantly: "immediately, without the least delay (MW). Although it doesn't convey that particular sense of the single "fell swoop", it does make it plain that the company raised $1 billion and did not then have the need to do anything else to land at the top.

Not so sure about how academic it sounds but a suitable word would be Suddenly.

The company raised over $1 billion, *Suddenly* placing it in the top band.

A similar phrase without the swooping would be;

The company raised over $1 billion, *all at once* placing it in the top band.

Or, combining them;

The company raised over $1 billion, *all of a sudden* placing it in the top band.

For my tastes I would go with Suddenly.

How about the idiom in short order? The Free Dictionary offers the following defintions:

in short order: quickly, efficiently, and without any delays.

in short order: very quickly.

in short order: quickly, without delay

in short order: immediately; rapidly (chiefly North American)

Your example:

The company raised over $1 billion in short order, placing it in the top band.

In short order has the same feel as in one big move and in one feel swoop, but perhaps spread out a little more over time, as would be the (relatively prompt) response of the market to an action the company under discussion had taken, e.g., gone public.