Max cash levels in public corps (White Giant)

I issued some new shares with some of my public corps - two of them are at over 100 billion shares issued by now. Their cash level is at 1,200,000,000,000 (1,2T) $SC and not rising anymore, despite continued share sales. What is the max. cash level a corporation can reach and what happens with the excess money? Is it just not being displayed in the corporation's page or does the money disappear?
Also what exactly does a corporation do with all that money? I raised over 800B in cash in only 1 month this way and the corporation value has skyrocketed to over 2.5T - but what is it good for?
Also: Is there a way to disable the automatic sending of messages each time a share transaction happens? At the current amount of shares being traded for my corporations, I am receiving up to 12.000 messages within a few minutes. It takes ages to load a page and delete all these (useless) messages.

automatic settings has a turn off getting messages for share transactions button.

I would think like other corps there is a threshold where excess cash gets paid to the corp owner or share holders. Its about 60B for state and private, my publics normally max at about 200B. 1.2T sounds like a lot of cash in a corp, maybe its because I use profit transfer...

It'll all shoot out to the shareholders most likely on the next game month. Automatically, until it drops to 200B.

I already noticed a small decline in cash levels - though only 30B in the last month. I guess the share holders (IFs) will be happy puppies - especially me, because I own most of the shares ^^
Btw I disabled the automatic sending of messages for share transactions entered manually - I still get messages for share transactions being done automatically and there doesn't seem to be a button for that (yet?).

Emperor, you might want to use some of the corporation money to buy supplies, which will do your company more good than just letting your ceo or country collect it.

I will use this thread as my question is about corporations.
I have a state controlled public gasoline corp in Alekzander which is paying -1,299.03M SC$ in fixed property costs. That seems excessive, and is causing the corp to loss money every round.
I can find no other gasoline company paying this large amount.I have lowered the salary and supply quality in an effort to avoid closing it. Any ideas would be welcome, cause maybe I made some sort of mistake with the corp.

I closed 2 gasoline corps last game month due to them making losses (and taking loans) for some reason. I guess the same problem applied to those corps aswell. I am also interested in an answer to the problem posted above.

Country controlled corporations pay really high fixed property costs. Also, property cost is based on how upgraded the corporation is. Therefore, state controlled TP corps upgraded to 250 pay the most. The few I own are up around 1.3B per month in property costs too.

Thanks Kitsune`. I did not know this. I guess there will be no more state controlled public corporations for me! It really seems unfair to me. I think corporations should all be treated equally.