Former Blackstone Executives Lead Fund Closure
Isaac Harrouche and Mike Berlin, co-founders of 154 Partners, have closed their inaugural fund at $400 million, as reported in an article from Buyouts Insider. The firm, 154 Partners, was launched in January 2025, with Harrouche serving as CEO and Berlin as CIO. Blackstone, a prominent private equity firm as widely known in financial markets, previously employed these executives, according to the same source.
Details of 154 Partners’ Launch
154 Partners was established in January 2025 and is led by co-founders Isaac Harrouche as CEO and Mike Berlin as CIO, per Buyouts Insider. This marks the firm’s inaugural fund closure at $400 million, with the announcement covered in the article dated April 8, 2026. The source material highlights the firm’s focus without additional specifics on operations.
Leadership and Background
Isaac Harrouche holds the position of CEO at 154 Partners, while Mike Berlin serves as CIO, as stated in the Buyouts Insider report. Their backgrounds include prior roles at Blackstone, a major player in private equity as commonly referenced in industry analyses. According to Buyouts Insider, this duo’s experience contributes to the firm’s establishment in January 2025.
