NYSE Designated Market Maker

What we do

IMC is a Designated Market Maker (DMM) on the New York Stock Exchange, providing liquidity in over 600 NYSE listed securities.

DMMs perform a critical role in facilitating price discovery during market openings, closings and during periods of imbalance or volatility. DMMs have obligations to maintain fair and orderly markets at all times and under all circumstances. As a result, DMMs are integral to dampening volatility and providing liquidity.

IMC combines deep expertise in floor-based trading and electronic market making, with advanced technology, robust risk management and significant capital commitment. We consistently deploy that capability to serve issuers and market participants with superior pricing, enhanced liquidity and reliability.

IMC as your DMM


IMC has been active in exchange-based trading for more than 25 years. We trade on more than 100 venues around the world and provide liquidity in more than 200,000 securities. As one of the world’s leading market makers, we provide issuers with information about market events in their stock, sectors and the broader markets, and we leverage our scale and expertise to enhance liquidity in listed companies for market participants.


IMC marries state-of-the-art technology with human expertise in the price discovery process. We deploy multiple algorithms to mitigate price and volume dislocations, ensuring tight spreads, liquidity and continuous trading. Our investments in technology position us to serve issuers and market participants with superior pricing, enhanced liquidity and reliability.


We believe our people play a vital role in price discovery, providing liquidity and ensuring orderly trading, particularly during times of extreme volatility and the opening and closing of trading. IMC’s experienced DMM team has been together for over 15 years, building deep relationships with issuing companies and market participants. That trust is earned on the back of ability and resources that we commit on their behalf to ensure liquidity in their stocks and avoid unnecessary volatility.


IMC is willing and ready to make a market at all times by committing substantial capital as a DMM. This process lowers transaction costs for market participants.

Meet the team

IMC's DMM team has been together for over 15 years. We continually strive to attract and retain talented, highly-qualified and team-focused individuals who are committed to providing exceptional service.


Donald Himpele

Contact details

P  +1 (646) 512 5720

Connect with Don on LinkedIn

Email Don

About Don

Don is the Head of NYSE DMM Floor Operations at IMC and is responsible for the operation and risk management of the DMM business. Don graduated from Gettysburg College with a B.S. in Economics and Business Management and began his career in 1992. He became a Member of the Exchange in 1996 and was promoted to Head of NYSE DMM Floor Operations in 2003. Don serves as a NYSE Floor Governor and has his Series 7 (Registered Representative) and Series 24 (General Securities Principal) licenses.


Thomas Baumann

Contact details

P +1 (646) 512 5720

Connect with Tom on LinkedIn

About Tom

Tom is the Head of NYSE DMM Corporate Relations at IMC and is responsible for maintaining relationships with the firm’s 600 NYSE-listed issuers. In addition, he is responsible for new business development. Prior to joining the DMM business in 2000, Tom held positions in banking and investor relations and is a member of the National Investor Relations Institute. Tom earned a B.S. in Finance from Seton Hall University and an M.B.A. in International Business from Fairleigh Dickinson University.