https://wiki.c2.com/?WarningSignsOfCorporateDoom
There are many interesting warning signs on that list.
> Toilet paper quality suddenly drops This is not a joke. Most of the time, the company buys supplies, rather than the hired cleaning firm. If they are skimping on TP, it is a bad sign, since it is a very minor expense. I once worked at a place that was constantly running out of TP. Massive layoff a few months after this started happening. Our company has just stopped the paper hand towels in the toilets (we still have air dryers)!(Cash flow)
I've seen this happen at a startup I worked at. About a month after they started skimping on the TP (and drinks, random supplies, etc) everyone discovered one morning that the building was locked and management/owners couldn't be reached.
Circa 2009 we had a layoff (we weren't the only ones) despite being profitable. The warning signs were obvious (to me at least, everyone else seemed caught off guard). We were profitable, but our most profitable project was coming to a close (a massive retrofit project for US military vehicles, they'd nearly finished retrofitting the entire fleet so the amount of work was due to drop massively). Despite that, we were still very profitable but without the same margins. The other divisions, however, were all losing money. Corporate didn't want to lose them, it was better to scale them back and rebuild after the recession (a large amount of other revenue our division was in both new construction and renovation of office and industrial buildings, which obviously weren't happening as much in 2009). Knowing where money comes into the corporation is critical for understanding how national/world events will impact it.
I got the phone call!!! It wasn't what I expected, I got the choice of either redundancy (which I'd secretly hoped for) or reassignment. I took reassignment, figuring it might be interesting and the option of redundancy would probably be available in the future anyway.
Anyway, they moved me to another team for 3 months so they could tick the box of removing a resource from my team and then moved me back. The work was pretty interesting so I didn't care.
After 14 years I did actually get the option of redundancy and this time I took it!
If the career advancement suddenly stops and project budgets shrink, that could be a sign. My company recently "transferred" (read that as laid off with a position at another company as part of the severance) a couple thousand people. It was a complete surprise even to the managers about 3 levels up (department heads). The only thing I saw in hindsight was promotions were basically frozen and budgets were shrinking.
Firing sales people: too much quotas not achieved
Buy-out and mergers: Duplicate roles (HR, common services, facilities mgmt), and restructuration.
All-hands meetings (unexpected).
Change of major providers (health, insurance, etc.)
Subcontractor consolidation - usually 1-2 fiscal years ahead of firing employees.