Transparence | About Us

Mr. Venditti joined South Street Securities (SSS) in February 2020 as a Managing Director and Senior Executive. He joined SSS with over 35 years of experience in the securities industry. As Head of Equity Finance, Mr. Venditti has spearheaded the expansion of SSS into the U.S Equity Finance and Trading business. He is also responsible for seeking out strategic partnerships and/or acquisitions. Prior to joining South Street Securities, Mr. Venditti spent 10 years with Nomura Securities from 1995-2005. In his time at Nomura, he held various roles such as the Global Head of Equity Finance in London where he also oversaw the Structured Equity Group. He also served as Nomura’s Co-Head of U.S. Equity Sales business in New York. In 2006, Mr. Venditti joined Paloma Securities as President and was responsible for expanding the firms’ sales, trading and financing capabilities. He remained at Paloma Securities until BMO acquired the Global Securities Lending business in 2009. Mr. Venditti was the Co-Head of BMO Global Prime Finance and Delta 1 trading business. His group was responsible for growing all aspects of BMO’s financing and trading capabilities globally until he departed in 2019. In addition, Mr. Venditti was an active Board Member of the Canadian Securities Lending Association from 2012 to 2019. Mr. Venditti attended the College of Staten Island. He is also FINRA Series 17, 24 and 63 registered.

Mr. Veeramallu joined South Street Securities in January 2021 as the Lead Technology Officer and Head of Product Development for the equity stock loan business. He has been an Investment Banking IT Executive with over 19 years of experience in building complex trading systems and high-performance teams across trading, operational and various support functions, primarily in Hedge Fund, Prime Brokerage and Securities Lending. He began his finance career by working for global banks namely UBS and Credit Suisse in Hong Kong, Singapore and New York. Soon after, he became the Vice President at Nomura Int’l Securities, managing the Domestic Securities Lending Technology team. He then moved up to head Prime Services Delivery and Production Services group at Bank of Nova Scotia, New York/Toronto. In his most recent position, Mr. Veeramallu was managing the Global Production Services Group at S3 partners for about 5 years where he was handling production services, client onboarding, data collection & distribution (financing rates, real time short interest, disclosure, etc.) and predictive analytics in the securities lending space. Mr. Veeramallu completed his Executive MBA at Rutgers Business School and holds a Master’s Degree in Computer Science from India.

Mr. Wilkinson joined South Street Securities in October 2020. As Vice President, he manages processes and operations for the stock loan department. He began his career in 1996 at Morgan Staley Trust for two years, followed by working a year in Securities Lending at Smith Barney. Mr. Wilkinson then served as Securities Associate Director for Securities Lending at UBS for 17 years. Finally, he served as Vice President at Cantor Fitzgerald from 2017 to 2020, where he oversaw the daily operations of securities lending that included collateral, settlements, trade bookings, billing, recalls and daily balancing. Mr. Wilkinson is a graduate of St. John’s University with a Bachelor’s Degree in Business Management. He is also FINRA Series 99 registered.

Mr. Leone joined South Street Securities in September 2021 as Managing Director of Equity Finance. He is imperative in cultivating the Equity Finance and Delta 1 trading business. Prior to joining South Street Securities, Mr. Leone spent 6 years with Nomura Securities from 1998-2004. At Nomura, he managed trading for securities lending and various strategies in equity products. In 2004, Mr. Leone joined Satellite Asset Management, a multi-strategy Hedge Fund as Head of Securities Lending and Equity Derivatives. While at Satellite, he co-managed and traded a 500mm SPAC portfolio and worked on Special Situations. He was also responsible for funding the firms credit positions through various structures until the fund was unwound in 2008. In 2010, Mr. Leone joined MUFG where he successfully built out the securities lending and equity derivatives platform. Over his 10 year tenor, he was responsible for managing securities financing team and their activities until departing in 2021. Mr. Leone attended Villanova University. He is also FINRA Series 7, 24, 55 and 63 registered.

Mr. Giusti joined South Street Securities in 2020 as Director of Equity Finance. He has been building out the Securities Lending Match Book, focusing on specials and equity funding. Prior to joining South Street Securities, he gained experience managing the specials book at Soc Gen. Mr. Giusti began his professional career at UBS supporting their equity derivative desk. He was then introduced to the stock loan/equity finance space during his five years at Newedge USA LLC. In 2013, Frank was hired as Vice President of the Securities Lending desk at Mitsubishi UFJ Securities, now known as MUFG Securities. He was responsible for growing and maintaining both the firm's Securities Lending and Repo Tri Party books. For his final two years at Mitsubishi, Mr. Giusti worked out of London in their EMEA office. While in London, he not only managed the firm's Securities Lending and Equity Finance Books, but also provided coverage on US Treasuries and French and German Government Bonds. Mr. Giusti graduated from Fairfield University in 2006 with a Bachelor of Science in Finance. He is also FINRA Series 7, 55 and 63 registered.

Ms. Judge began her career as a Management Associate for Matrix Applications and South Street Securities in 2020 following a Marketing & Finance Internship in 2018 and 2019. She later transitioned into a Business Development Specialist role, focused on supporting sales, marketing, client relations, onboarding, business strategy and project development. As Head of Marketing & Communications at Matrix Applications and Head of Digital Marketing at South Street Securities, she is responsible for overseeing the development and implementation of marketing strategies. Recently, she also helped lead the strategic rebranding and website launch for the Independent Dealer Trader Association (IDTA).

Ms. Judge graduated Magna Cum Laude from Elon University in May 2020 with majors in Marketing, Finance and Economics. In December 2022, Ms. Judge graduated Magna Cum Laude from The College of William & Mary with a Master's degree in Marketing. Currently, she volunteers as Head of Memberships for the FinTech B2B Marketing Community.

Karanjit transitioned from the military to AmeriVet Securities, a service-disabled broker/dealer where he helped build out the firm across equity, corporate debt, and public finance. Karanjit supports strategic initiatives & sales across South Street Securities conducting analysis, research, and evaluation of prospective companies. In addition, he supports our portfolio companies and manager our cryptocurrency/blockchain initiatives. He is registered with his Series 7 and 63.

Jay is a seasoned professional with a strong background in operational trade support and client service. With significant contributions to the Securities Lending Desk at Mizuho Securities, Cantor Fitzgerald, and Wells Fargo Securities, Jay’s expertise lies in providing front office support. This includes handling tasks such as contract comparison, daily domestic MTM and OCC MTM, corporate actions, settlements, billing, and account setups. At Wells Fargo Securities, Jay took the initiative in developing Excel sheets using macros, PivotTable, and VLOOKUP to streamline daily functions, enhancing efficiency and productivity. Jay graduated from Rutgers University with a Bachelors in Finance in 2017 and is registered with his Series 7 and 99.

Matt Rafizadeh is a Business Analyst with 7+ years of experience working in Financial Services. As a member of the Business Development Team, he focuses on implementation of client requirements, contract negotiations, and enhancing sales and development workflows while delivering top-notch results for Matrix clients. He holds a Bachelor’s Degree in Economics and has experience working in trade operations on a repo desk as well as in valuation and performance for a global asset management firm. Mr. Rafizadeh is also currently pursuing his J.D. at Seton Hall University School of Law.

Mr. Mellert oversees business development and acts as client advocate for Matrix Applications, promoting the firm’s fixed income collateral management and margining platforms along with the company’s Managed Services for the back office.

In 1999, Mr. Mellert co-founded Capital Markets Engineering & Trading LLC. And in 2000, he and the team launched Matrix Applications, a technology service bureau whose clients span from small broker / dealers to asset managers to global banks. He was responsible for the formation and infrastructure development of South Street Securities (SSS), which launched in 2004.

In 1989, Mr. Mellert spent two years in Citibank’s Global Custody division, followed by three at The Federal Reserve Bank of New York’s Funds Transfer and Electronic Securities divisions. He re-joined Citibank in 1993, in the Reserve Management division before moving to the Treasury Finance Desk where he traded US, Canadian and high yield repo.

Mr. Mellert is a graduate of Georgetown University and holds an MBA from the NYU Stern School of Business.

A fintech service bureau providing technology and operational solutions for the capital markets

Our History

Since 2000, Matrix Applications has been a transformative force in the capital markets space. Learn about our history by watching our quick, 60-second video.

A fintech service bureau providing technology and operational solutions for the capital markets

Our History

Since 2000, Matrix Applications has been a transformative force in the capital markets space. Learn about our history by watching our quick, 60-second video.

Anthony Venditti

Raghu Veeramallu

Doug Wilkinson

Andrew Leone

Frank Guisti

Colleen Judge

Karanjit Paul

Jay Tucker

Matt Rafizadeh

Stephen Mellert