Twitter director Egon Durban will not leave Twitter’s board despite a Shareholder vote to boot him, Twitter said in a regulatory filing. The company said its board believes his lack of shareholder support was due to his commitments in director roles on other company boards. Since he had promised to reduce his other commitments, the board had chosen not to remove him, even though he had offered to resign.

Durban serves on six other boards of publicly traded companies, but promised to reduce the number of boards he serves on to five within one year.

The company said in the filing, “While the Board does not believe that Mr. Durban’s other public company directorships will become an impediment if such engagements were to continue, Mr. Durban’s commitment to reduce his board service commitment to five public company boards by the Remediation Date appropriately addresses the concerns raised by stockholders with regard to such engagements. Accordingly, the Board has reached the determination that accepting Mr. Durban’s Tendered Resignation at this time is not in the best interests of the Company.”

“The Board considers Mr. Durban a highly effective member and believes that he brings to the Board an unparalleled operational knowledge of the industry, a unique perspective, and an invaluable skill set and experience with mergers and acquisitions. The Board noted that Mr. Durban has strengthened its ability to oversee the Company’s long-term value creation strategy and effectively govern its implementation. Further, Mr. Durban is consistently well-prepared, engaged and a meaningful contributor to Board meetings and discussions.”

Durban is also the CEO of Silver Lake, a private equity firm which has a history with Elon Musk. It had invested $100 million into Solar City before the solar business was bought out by Tesla. In addition, when Musk had toyed with the idea of taking Tesla private in 2018, he had said he was working with Silver Lake. Twitter shareholders who are suing Elon Musk allege, among other things, that Musk made use of insider information he had acquired from Durban, in his acquisition bid.

Elon Musk was also to be appointed to Twitter’s board in Saturday, however he informed the board he would not be taking any board seat.