Heather Kos, CPA, CMA, IRC
Builders FirstSource, Inc.

Heather Kos, CPA, IRC is Senior Vice President, Investor Relations at Builders FirstSource (NYSE: BLDR), the largest U.S. supplier of building products, prefabricated components, and value-added services to the professional market segment for new residential construction and repair and remodeling. Prior to BLDR, she served as the investor relations officer at Univar Solutions (NYSE: UNVR), Ingredion (NYSE: INGR), and Navistar (NYSE: NAV). Kos also has extensive finance, strategy and operations experience having served as director of finance, plant controller, and various finance positions at Navistar. An experienced investor relations professional, Heather has developed and implemented comprehensive IR programs for three Fortune 500 companies, effectively dealt with high-impact situations including earnings surprises and leadership changes, nimbly managed the communications of Navistar’s delisting by the NYSE and activist campaigns, and been nominated for several IR Magazine awards. She was recognized in the Institutional Investor “All-America Executive Team” in 2023.
Heather earned a B.A. degree in accounting from Michigan State University and a M.B.A. from DePaul University in Chicago. She is a Certified Public Accountant and Investor Relations Charter (IRC) holder.
Heather is an active member of the National Investor Relations Institute’s Senior Roundtable, having served as a member of Certification Council and the Editorial Advisory Board. She is also a Chicago Niri Board Member, currently serving as Chair.


Board Term
2024-2027