Former Blackstone Colleagues Isaac Harrouche and Mike Berlin Partner with David Blitzer and Announce Final Close of $400 Million Debut Fund

154 Partners (“154” or the “Firm”), a private equity firm focused on partnering with founders and owner-operators, announced the final closing of 154 Partners Fund I LP (together with its parallel vehicle, the “Fund” or “Fund I”) at its $400 million hard cap. Isaac Harrouche and Mike Berlin launched the Firm in January 2025. The Firm primarily invests in residential, business, and sports & live event services.

Since its debut last year, 154 has invested in an accounting services consolidation platform and in a sports & live event-focused guest services platform.

Harrouche and Berlin began their careers together at Blackstone in its Tactical Opportunities group, working with David Blitzer. Together, they have extensive experience structuring transactions and evaluating opportunities across industries. Blitzer joins Harrouche and Berlin as the third member of the Firm’s Investment Committee.