B ahaa Hariri is the eldest son of the assassinated former Lebanese Prime Minister, Rafic Hariri. He inherited a significant portion of his father's vast business empire, which was built on the construction giant Saudi Oger. After his father's death, Bahaa sold his stake in Saudi Oger to his younger brother, Saad Hariri, who would also go on to become Prime Minister of Lebanon.

After divesting from the family's core construction business, Bahaa Hariri forged his own path as an investor. He founded his own real estate and investment firm, Horizon Group, which has been involved in major development projects in Jordan and Lebanon. He has also been an outspoken critic of Hezbollah's influence in Lebanon and has positioned himself as a political figure from afar, though he has not held political office himself. His career represents a divergence from his family's direct political path, focusing instead on building his own investment portfolio.