Facebook's monthly active users were 1.44 billion as of 31 March, representing an increase of 13% year-on-year.
'This stock will have to be earned over time, and will also have to be earned by performance,' said Parker.
First-quarter profit was $512m (£341m), a fall of 20% from a year earlier - but revenues are up 42%.
Facebook invited Instagram users into its huge new building in Menlo Park, designed by Frank Gehry.
Facebook will begin testing its internet-connected drones this summer to help drive its Internet.org project.
Facebook unveils embeddable video feature to rival YouTube at the firm's F8 conference.
Mark Zuckerberg announced next phase of Messenger app at the social network's annual F8 conference
To send money using Facebook Messenger, users will have to add a debit card and create a PIN.
Paris court rules French judges have final say in controversy over Gustave Courbet's L'Origine du Monde painting.
The Facebook billionaire said he has one simple test that helps him employ the right people.
There are now a record 1,826 billionaires in the world says Forbes magazine
Facebook's head of product Chris Cox reveals firm is working on VR apps following Oculus Rift deal.
Gates was taking part in an 'Ask Me Anything' session when he said he 'feels pretty stupid' for not learning another language.
Mark Zuckerberg contradicts #JeSuisCharlie post as Facebook censors images of prophet Muhammad.
McAfee tells us about Belize, aliens, and life on the run - but is it all real?
Facebook considered Xiaomi friend request as Zuckerberg eyes opportunity to expand into China and smartphone market.
Zuckerberg said an extremist wanted him sentenced to death because Facebook refused to ban content about the Prophet Mohammed.
Apple and Google add 'je suis Charlie' message to French websites, while Zuckerberg defends free speech.
Facebook is thinking about adding more ways for users to quickly express emotion, beyond the 'like' button
World Bank releases report saying bitcoin is not Ponzi scheme, while Ethereum trumps Facebook.
Elon Musk reveals announcement regarding micro-satellites will be made in two to three months.
The social network has more than doubled the people on its messaging service since April.