Madison Bay Capital Partners

Madison Bay Capital Partners, founded in 2013 and based in New York, is a growth equity firm that focuses on investing in companies within the technology and consumer products sectors in the United States. The firm positions itself as a solution provider for business growth and investment opportunities, aiming to support companies as they expand and develop in their respective markets.

Eugene Song

Co-Founder and Managing Partner

4 past transactions

Aria Systems

Private Equity Round in 2018
Aria Systems, established in 2002 and headquartered in San Francisco, specializes in providing a cloud-based platform for managing and billing recurring revenues. Its core product, Aria, caters to enterprises seeking subscription-based billing solutions, while Aria Crescendo sets industry standards for cloud-based monetization. Aria for Communications serves mobile, multiple system operators, and over-the-top media providers. The company serves clients across hi-tech, media, telecom, cloud services, and finance industries worldwide, helping them maximize customer satisfaction, retention, and lifetime value through agile billing and active customer engagement.

Aria Systems

Series F in 2017
Aria Systems, established in 2002 and headquartered in San Francisco, specializes in providing a cloud-based platform for managing and billing recurring revenues. Its core product, Aria, caters to enterprises seeking subscription-based billing solutions, while Aria Crescendo sets industry standards for cloud-based monetization. Aria for Communications serves mobile, multiple system operators, and over-the-top media providers. The company serves clients across hi-tech, media, telecom, cloud services, and finance industries worldwide, helping them maximize customer satisfaction, retention, and lifetime value through agile billing and active customer engagement.

Midwestern BioAg

Venture Round in 2016
Midwestern BioAg, Inc. is an agricultural company based in Madison, Wisconsin, specializing in biologically-based products and consulting services aimed at enhancing soil health and farming practices. Founded in 1983, it manufactures a variety of fertilizers, livestock nutrition products, seeds, and organic agricultural goods. The company offers tailored farm management plans that focus on improving soil capacity, which in turn supports economic and environmental benefits for farmers. Midwestern BioAg's product lineup includes various fertilizer blends, soil amendments, and livestock feed solutions tailored for different animal needs and crop types. With additional facilities across several states, the company serves its customers through a network of sales consultants, helping farmers increase yields and the nutritional quality of their produce while promoting sustainable agricultural practices.

Aria Systems

Series E in 2016
Aria Systems, established in 2002 and headquartered in San Francisco, specializes in providing a cloud-based platform for managing and billing recurring revenues. Its core product, Aria, caters to enterprises seeking subscription-based billing solutions, while Aria Crescendo sets industry standards for cloud-based monetization. Aria for Communications serves mobile, multiple system operators, and over-the-top media providers. The company serves clients across hi-tech, media, telecom, cloud services, and finance industries worldwide, helping them maximize customer satisfaction, retention, and lifetime value through agile billing and active customer engagement.
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