NEW YORK (TheStreet) -- Another earnings week came and went, and while earnings bumped up some CEOs' net worth, others were not so lucky. 

On Tuesday, Twitter (TWTR) - Get Report reported earnings that were above estimates. However, once Jack Dorsey started the earnings call, the stock plummeted. Dorsey, in his first-ever earnings call since becoming the interim CEO of Twitter, essentially said the company had some user growth problems that would take awhile to figure out. Dorsey did not comment on whom the next CEO was going to be or whether he would remain the company's head.

At Monday's open, Twitter shares were trading at $35.11. By Friday's close, they were trading at $31.00. Owning 3% of the company's stock, Dorsey lost around $89 million dollars on his Twitter shares.

Facebook's (FB) - Get Report CEO, Mark Zuckerberg, was also down this week after his company reported earnings that beat estimates but showed an 82% increase in spending.

But while Twitter is suffering from a growth slowdown lately, Zuckerberg's social media giant matched estimates for monthly active user growth. Twitter was only able to grow its user base by two million users, excluding the six million SMS-only Twitter users. Facebook was able to increase its user base by 50 million users. Facebook also showed strong numbers for the mobile advertising division.

From Monday's open at $96.58 to Friday's close at $94.01, Zuckerberg lost $10 million on his four million Facebook shares.

While these weekly losses may seem like huge drops, they are based off the CEO's stock holdings in the company and are not realized losses. And to put these losses in better perspective, they are relatively small fractions of these CEOs' overall net worth. According to Forbes, Zuckerberg is worth around $34 billion and Dorsey is worth about $2.7 billion.