Twitter Turmoil Continues As More Leaders Depart by Kia Kokalitcheva @FortuneMagazine May 26, 2016, 5:44 PM EDT E-mail Tweet Facebook Linkedin Share icons Twitter is losing more top leaders as the company continues to struggle with slowing growth. Nathan Hubbard, Twitter’s TWTR commerce and recently appointed media chief, and Jana Messerschmidt, its head of business development, plan to leave the microblogging service, Twitter COO Adam Bain confirmed on Thursday via tweets after a report by tech news site Recode. Twitter is working to bring its “Partnerships” teams—business development, media, and its brand-focused Amplify division—under the leadership of Ali Jafari, the company’s vice president of revenue partnerships, whose role is now expanding to head all partnerships, according to Bain. Thank you to @janamal and @nathanchubbard, who've helped us build great teams, and who I have no doubt will continue to have success. — adam bain (@adambain) May 26, 2016 Hubbard took over Twitter’s media division in January, amid several departures from the company’s top ranks including product chief Kevin Weil, who left to join Instagram, much to the surprise of Twitter employees. Messerschmidt joined Twitter in 2010 and has been responsible for the company’s relationships with other companies. Get Data Sheet, Fortune’s technology newsletter. News of Hubbard’s departure come just a day after a report by BuzzFeed that the company has disbanded its commerce team and is killing off its “Buy” button, which it debuted with much fanfare in 2014. Fortune has learned that they’ll be leaving at the end of the month, though it’s unclear where they’re headed to next. A Twitter spokesman only confirmed their departures and Jafari’s new role. In some ways, Hubbard and Messerschmidt’s departures are not surprising given the recent shakeups in the top Twitter ranks since co-founder Jack Dorsey’s return as the company’s CEO. However, just a couple of months ago, Twitter management seemed to be singing a different tune. For more on Twitter, watch: “People are here because they want to be here. And they want to be here to, like, continue to drive success of this company. So people are not here, like, phoning it in,” senior director of corporate development and strategy Jessica Verrilli told Fortune in March. “There’s no reason to come here and just, like, sit around and collect your [employee restricted stock units]. There’s a million places to work. If you are here, you’re here because you believe in this place and you’re trying to create something great.” For some time, Twitter has been battling a flat user growth, investor discontent over a falling stock price, and a service that was in much need of a new direction. As Fortune chronicled in March, Dorsey’s return last fall as CEO marked the company’s attempt to fix it all.