About Sunflower Bank, N.A.

Operating as Sunflower Bank, First National 1870 and Guardian Mortgage, Sunflower Bank, N.A. provides financial solutions to the individual communities we serve through a full range of relationship-focused services to meet personal, business and wealth management financial objectives.


Whether you know us as Sunflower Bank, First National 1870 or Guardian Mortgage, our philosophy is simple: we offer a full range of financial products that create possibility in the lives we touch and the communities we serve. We value the needs of each customer and partner with them to help achieve their goals with innovative solutions delivered through a regional structure that provides local expertise.

We are proud of our longevity and the long-term relationships it represents. Sunflower Bank was founded in 1892. We operate as First National 1870 in Albuquerque, Los Alamos and Santa Fe, New Mexico with roots dating back to 1870. Additionally, Guardian Mortgage, our residential mortgage division, has helped generations of valued customers across our footprint and beyond realize their dreams of homeownership.

$7.6 billion in assets

65 personal banking locations

Originate mortgages in 40+ states

Sunflower Bank, N.A. has $7.6 billion in assets as of March 31, 2023, headquarters in Denver, 65 personal banking locations in five states, and mortgage capabilities in more than 40 states. FirstSun Capital Bancorp (OTCQX: FSUN) is the financial holding company for Sunflower Bank, N.A.

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BauerFinancial 5-Star Rated Bank, June 2023

We are proud to be recognized as a BauerFinancial 5-Star rated bank for another consecutive quarter. The designation represents a Superior rating and recommendation from this leading independent bank research firm. 

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