Antonia Sieber

Antonia Sieber is a principal in the private equity and venture capital team of LGT Capital Partners, which she joined in 2012. She works at the firm's headquarters in Pfäffikon in the canton of Schwyz. Before her current title she was an executive director at the firm.

Her focus is primary investments in European private equity funds. She is lead portfolio manager for several separate accounts and belongs to the leadership team of LGT Capital Partners' impact investing activities. By 2024 she had led more than 60 due diligences on primary funds, covering more than USD 4 billion of invested capital.

In 2024 Private Equity News named her one of its 25 Rising Stars of Private Equity.