About Us

About Porthaven Partners

Porthaven Partners is a national real estate and advisory firm providing a wide range of services to institutional and private investors, banking institutions, developers, tenants and corporations.

By combining our real estate track record with our background and experience in public accounting, consulting and banking, we are able to provide unique guidance and solutions to accomplish our clients’ goals and objectives.



Investment Sales

Porthaven Partners has completed in excess of $4.0 billion in commercial real estate transactions across the United States. Services provided to a variety of industry participants including institutional investors, private equity firms, developers, private individuals, REITs and corporations include the following:
• Dispositions – Public Offerings or Private Placements of single assets or portfolios
• Acquisitions – Asset or Portfolio Origination, Underwriting and Closing
• Financing – Debt Placement or Equity solutions for Permanent Loans, Constructions Loans, Mezzanine Loans and Joint Ventures


Management and Leasing

Porthaven’s Property Management and Leasing division specializes in commercial office, retail, and industrial properties. With over 500,000 SF of commercial property in Kansas, Oklahoma, and Texas, Porthaven’s clients range from publicly traded REIT’s to financial institutions to individual property owners. Porthaven Property Management’s goal is to provide the highest level of professionalism and stewardship.


Bank Consulting/Advisory

Porthaven Partners brings a unique blend of analytical and transactional expertise. With over $2.5 billion in transactional experience combined with backgrounds in audit, consulting, and finance, Porthaven’s Advisory division provides valuable insight to financial institutions and commercial real estate owners throughout the United States. In collaboration with various experts throughout the industry, the Porthaven Advisory division has developed a Property Evaluation product that provides financial institutions with high quality analytics covering all types of commercial real estate. These reports have been instrumental in helping our clients make decisions in a timely and cost-effective manner.


Darren Sides – Partner


Mr. Sides is a founding partner of Porthaven Partners, and has been instrumental in working for over a decade with a wide range of clients including developers, financial institutions, publicly-traded REITs and private equity investors to develop strategies for optimizing commercial real estate development, ownership and disposition. Under his leadership, Mr. Sides has led teams in the completion of over $4.0 billion in commercial real estate transactions including industrial, office and retail properties.

Prior to Mr. Sides’ entry into commercial real estate, he spent approximately five years with PricewaterhouseCoopers, serving a variety of clients in developing optimum business turnaround strategies and determining underlying values of assets and credit exposure levels.

Mr. Sides holds his B.S. in Accounting from Louisiana State University.

Ryan S. Carter – Partner


Mr. Carter is a founding partner of Porthaven Partners, with a primary focus on advising clients through the acquisition, financing, and disposition of investment properties throughout the United States. Dating back to 2002, Mr. Carter’s clients include public and private REIT’s, developers, financial institutions, and high net worth individuals. In addition to investment sales, Mr. Carter has provided leadership to the asset management, and consulting services divisions, serving private owners, REITs, and financial institutions.

Mr. Carter began his career as an auditor for KPMG. In this capacity, he served middle-market and large cap publicly traded clients within the manufacturing and oil & gas sectors. Prior to his entry into commercial real estate, Mr. Carter was fortunate to have the opportunity to serve his home church as business administrator leading into the development of a 36-acre; 300,000+ SF facility.

Mr. Carter earned his B.S.B.A. in Accounting from The University of Tulsa, his M.B.A. from Oklahoma State University, and holds a C.P.A. designation (inactive) within the State of Oklahoma.

Zack Ziegenhorn – Senior Associate


Mr. Ziegenhorn joined Porthaven Partners in 2020 working directly with Mr. Sides and focusing on investment sales of industrial and retail properties across the country. In his short time in commercial real estate, Zack has been able to assist a wide range of clients in advising them on their acquisition and disposition needs. He emphasizes long-term client relationships and takes a unique approach to help each client achieve their personal goals and objectives.

Mr. Ziegenhorn began his career in commercial real estate directly out of college starting with Marcus & Millichap in their Tulsa office before transitioning into his current role. Zack enjoys spending time with friends and family, playing golf, and loves sooner football and the St. Louis Cardinals. He is also a member of the Sigma Chi Fraternity.

Mr. Ziegenhorn earned his B.A. in Communication from the University of Oklahoma in 2017 after spending one year playing college baseball at Seminole State College.

Kenneth Boykin – Analyst


Mr. Boykin joined Porthaven Partners in 2019, with a primary focus on providing relevant market research to team members and clients as well as support to the various production teams prospecting for new opportunities to serve our clients. In addition, Kenneth works directly with Landlords to not only maintain but also add value on existing investment properties through direct communication with tenants and other third parties.

Before joining Porthaven Partners, Mr. Boykin competed in NCAA Division I athletics as a tennis player for Oral Roberts University for four years, and during this time was named to the All-Conference team twice, and the NCAA All-Academic team three times. Kenneth still enjoys playing tennis and competing in other sports with friends.

Mr. Boykin earned his B.S. in Business Administration from Oral Roberts University.

Amy Carey – Accountant


Amy Carey has been a key member of Porthaven Partners dating back to 2010. She currently serves within the Property Management division as an Accountant, relating with owners, tenants and vendors. In this role, Amy is responsible for all financial reporting matters as well as identifying opportunities for improved efficiency and asset management.

Prior to Amy’s tenure with Porthaven, she served in various capacities within the real estate and investment brokerage industries, including as a licensed securities broker with Merrill Lynch. Amy has volunteered her time and talents extensively, including as an officer for Jenks Public Schools PTA. Amy holds a Bachelor’s Degree from The University of Arkansas.