Alyssum partners with leading institutions, corporations, family-owned businesses and entrepreneurs to provide financial advisory services.

We work closely with clients seeking strategic alternatives for middle-market platform and add-on businesses across a variety of industries.

Our purpose is to provide fresh perspective and differentiated approach to ensure the best possible outcomes and scenarios are always within reach.




Buy-side Advisory

We understand institutional investors and corporate development professionals encounter a myriad of distractions taking time and effort away from new deal origination. Our M&A transaction intermediation program is designed to help our clients address a basic challenge—staying in the market.

Alyssum provides outsourced corporate development services to streamline your acquisition process and enhance current deal flow.

Sell-side Advisory

The sell-side process can be very arduous. That's why we work closely with our clients as a trusted partner throughout all phases of the transaction life cycle. From preliminary value discussions to preparing management teams for road show "readiness" and target companies for external scrutiny, all the way to facilitating transaction close.

Alyssum provides independent, conflict-free and client-focused advice to ensure the best possible outcomes and scenarios are always within reach.



We advise clients on a wide range of capital raising, restructuring and financing situations.

Alyssum can work across the entire capital structure to identify the best possible financing solutions that meet your goals and objectives.



Tom Thongprasert

Tom Thongprasert
Founder & Managing Partner

Tom is responsible for leading client engagements, business development, strategy, operations and marketing efforts at Alyssum. Prior to launching Alyssum, Tom was Senior Equity Analyst at Patara Capital focused on fundamental deep-dive research, due diligence, valuation and portfolio management of micro-to-small cap companies across a variety of sectors. Tom's prior experience also includes sell-side equity research covering oil service companies at Banc of America Securities and investment banking within the Real Estate & Lodging Group at JPMorgan where Tom began his career executing M&A transactions, capital raises, debt issuances, syndications and securitizations. Tom earned his BA from The University of Texas at Austin.

Roy Clauss

Roy Clauss
Managing Director

Roy is responsible for leading client engagements, business development, strategy and marketing efforts at Alyssum. Roy brings 40 years of investment banking experience across a broad range of debt, equity, M&A and other products and was formerly Managing Director and Transportation Group Head at Salomon Brothers and Lehman Brothers. Roy has completed over $70 billion in transactions across a diverse group of industries and clients, both domestic and international, including airlines, aviation, broadcasting, cruise lines, financial sponsors, governments, internet, leisure, rail, shipping, sovereigns and trucking companies. Roy earned his MBA from Harvard Business School and his BA from Amherst College.


444 N Michigan Ave
Suite 1200
Chicago, IL 60611
(312) 265-8860

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