Boeing has famously done stock buybacks of $43 Billion for the period of 2013-2019. Now they need to raise $10 Billion in cash. Whether they're doing that by issuing new stock or by selling bought stock is moot.
They converted $43 Billion dollars into stock (probably more since then, but let's make the point), raising their market cap from $57B in 2013 to $93B today. Which is a difference of $36B[1]. So they converted $43B in 2013 into $36B in 2024. It's worse than that, because if you account for inflation since 2019, The $36B is actually only equivalent to $28.8B [2] of the dollars that they spent on it.
This means, that in the period from 2013-2019 Boeing lost ~$14B in cash by spending it on stock buybacks.
My comment here is just that. They converted $43B cash (probably more) into $29B stock value. And now they need $10B cash. For which they will issue new stock, and likely tank the stock value even more. I would be surprised if there's enough float that they wouldn't just destroy the stock value entirely by trying to issue ($10B/154($/stk)) == 64M Stock. Their average volume (I assume float) is 9M according to Google stock, but they also say 20+M for the past few years. So I'm guessing we could see Boeing stock drop by half for this round of sales.
[1] https://www.macrotrends.net/stocks/charts/BA/boeing/market-c... [2] https://data.bls.gov/cgi-bin/cpicalc.pl?cost1=36%2C000.00&ye...