That's simply not correct.
It's an all stock transaction, so AppLovin can issue stock equal to $17.5B and transfer that to owners of Unity stock in return for their Unity stock. Then the two companies merge and the AppLovin stock owners now own both.
You can read details here:
> in a transaction where each outstanding share of Unity common stock would be exchanged for 1.152 shares of AppLovin Class A voting common stock and 0.314 shares of AppLovin Class C non-voting common stock. Under these terms, current Unity shareholders would receive approximately 55.0% of the outstanding shares of the combined company, with the Class A shares representing approximately 49.0% of the outstanding voting rights of the combined company.
https://www.businesswire.com/news/home/20220809005530/en/App...
Seems like they’re basically printing double the existing stock to cover it
Of course, the market may disagree on the value in either direction.
Mergers are weird.
Also, Unity stock holders end up holding 55% of the merged company.
And Unity is a loss making company, with only $297.0 Q2 revenue. https://www.marketscreener.com/quote/stock/UNITY-SOFTWARE-IN...
In this case, the expectation is that the value of Unity equals roughly the value of the issued shares.