[13] Israel A. Englander and Ronald Shear, an acquaintance from the American Stock Exchange (AMEX), founded the firm in 1989 with $35 million.

"[3] Millennium Management initially underperformed and co-founder Ronald Shear left the firm six months after founding it.

[3] In 2016, Millennium hired Bobby Jain, then global head of Credit Suisse Asset Management, to join Israel Englander as co-CIO.

[14] In the spring of 2018, Millennium launched a joint venture with WorldQuant, a quantitative investment management firm.

[15] In 2019, London-based investment firm LCH Investment ranked Millennium Management 12th on their ranking of most successful hedge funds of all time reporting that since its founding in 1989 the firm had made $22.4 billion for its investors,[3] an average of 14% annually since inception.