US Steel (NYSE:X) said Monday it is still committed to pursuing a sale to Nippon Steel (OTCPK:NPSCY) (OTCPK:NISTF), saying "our stockholders will not be well served by turning over control of the company to Ancora.

Ancora Holdings Group, with $10 billion in assets, reported acquiring a 0.18% stake in the Pittsburgh company. It said Monday that U.S. Steel CEO David Burritt and the company’s board have prioritized a sale to Nippon because they stand to receive more than $100 million if it goes forward.

Activist investor Ancora called for a shakeup in U.S. Steel leadership on Monday and adding new members to the board of directors after the company's failed sale to Nippon Steel.