Austin, TX & San Francisco, CA — February 3, 2026 — Mainsail Partners, a growth equity firm investing in bootstrapped B2B software companies to help them grow into market leaders, today announced six internal promotions, including Anthony Hayes and Phil Stern to Partner. In their expanded roles, Anthony and Phil will help shape Mainsail’s strategy, deepen the firm’s operational support capabilities, and enhance value creation across the portfolio.

On the firm’s Growth and Finance & Firm Operations Teams, Aeri Miller was promoted to Vice President, Finance; Ania Frankel to Senior Director, Internal Operations; Immad Baig to Director, Accounting; and Rachel Byrne to Senior Talent Manager. Their promotions reflect each colleague’s contributions to both the firm and its portfolio companies.

“Anthony and Phil exemplify the kind of leadership and integrity that define Mainsail — they combine thoughtful investment perspectives with a true operational mindset and collaborative approach that are essential to the partnerships we form with software founders,” said Gavin Turner, Co-Founder and Managing Partner, Mainsail Partners. “We are proud to recognize the impact of all our colleagues promoted in 2026 and look forward to their continued contributions to Mainsail and our portfolio.”

Introducing Mainsail’s New Partners

Anthony Hayes joined Mainsail in 2018 as an Associate and has been a cornerstone of the firm’s Investment Team since, with rising responsibility and success in cultivating new portfolio investments and partnering with each company in their growth. He serves on multiple boards including Steelhead, CourtReserve, Flyntlok, ChiroHD, Skimmer, ServiceCore, ProShop, and Flight Schedule Pro.

Prior to joining Mainsail, Anthony was an investment banker at Bank of America Merrill Lynch. He is a graduate of Stanford University, where he also competed on the varsity football team.

Phil Stern joined Mainsail in 2020 and has been a key leader on the Growth Team, helping portfolio companies optimize go-to-market strategies and scale sales operations. Drawing from his experience as a former software operator and SaaS sales leader, Phil brings deep domain experience and a collaborative approach to each portfolio partnership. He currently serves on the boards of Fullbay, ServiceCore and Teamfront.

Before Mainsail, he held sales and growth leadership roles at Gusto, Zen Planner, LogMeIn, and Forrester Research. He is a graduate of Bowdoin College where he was co-captain of the varsity lacrosse team.

About Mainsail Partners

Mainsail Partners is a growth equity firm that invests in bootstrapped B2B software companies to help them grow into market leaders. Our team is purpose-built to include experienced investors and software operators who help founders build great teams, develop industry-leading products, design data-driven and scalable infrastructure, harness the power of AI to drive productivity and innovation, and grow market share. Mainsail’s hands-on support and best practices are delivered through a collaborative approach that respects founder-led cultures and helps build on each company’s commitment to its people and customers. With offices in Austin and San Francisco, Mainsail Partners has raised nearly $4 billion in committed capital and partnered with 100+ companies over the nearly 23 years. For more information, visit www.mainsailpartners.com.