The Menlo Park, Calif.-based company's stock never recovered from a botched initial public offering in May, at one point seeing its value slashed in half by shareholders who don't think it's increasing revenue fast enough, especially from its fast-growing mobile user base.
Last month Zuckerberg gave his first interview since Facebook's shaky IPO and since that time he's been working hard to boost confidence among investors, employees and the public.
The 28-year-old executive also continued to reassure that he is the right person to lead Facebook, as some on Wall Street have questioned whether he has the ability to lead a large public company.
"I take this responsibility very seriously," he said.
To further mark the occasion, Facebook also released a video Thursday that, somewhat abstractly, seeks to illustrate its ubiquity and utility in connecting people to one another. Directed by Alejandro Gonzalez Inarritu ("Babel," "21 Grams" and "Amores Perros"), the video starts off with an empty red chair suspended in midair in a forest. Then it moves to chairs with people, first just one then two, and groups around a dinner table, dancing, playing. Then more chairs.
"Chairs. Chairs are made so that anyone can sit down and take a break. Anyone can sit on a chair," a woman's voice assures the viewer. "And if the chair is large enough, they can sit down together. And tell jokes. Or make up stories. Or just listen. Chairs are for people. And that is why chairs are like Facebook."
See also: doorbells, airplanes and bridges.
"These are things people use to get together so they can open up and connect," the ad continues. The conclusion? The universe is vast and dark and makes us wonder if we are alone. And there is Facebook. And chairs, of course.
It's Facebook's first advertising campaign surrounding its brand. So far, though, the company is not saying whether the video will air on television.
Facebook Inc.'s stock slipped a penny to $21.82 in afternoon trading. The shares are 43 percent below their $38 IPO price.
AP Business Writer Michelle Chapman contributed to this story.The Facebook chair video