About First National 1870, a division of 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.

Sunflower Bank, NA logos

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.

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$7.9 billion in assets*

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65 personal banking locations

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Originate mortgages in 40+ states

Sunflower Bank, N.A. has $7.9 billion in assets* as of December 31, 2023, headquarters in Dallas, TX, 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.

*SNL Financial

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Company Achievements

BaurFinancial Award


BauerFinancial 5-Star Rated Bank, December 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. 



Sunflower Bank, N.A. Named a Top 10 Commercial Lender by Independent Banker

We are proud to be named one of the top 10 Commercial lenders with more than $1 billion in assets by Independent Banker, the award-winning magazine of the Independent Community Bankers of America. It’s an honor to be recognized for this achievement among our community bank peers. We look forward to building on this momentum and continuing to cultivate full relationships that support business growth in our Sunflower Bank and First National 1870 communities. 


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Top Lenders Award



2023 Gold Marcom Award

2023 Gold Marcom Award 

We are proud to announce that our new website has received a Gold MarCom Award for marketing and communications excellence! With about 6,500 entries per year from various countries, these awards are one of the largest and most well-respected creative competitions in the world. Our website was recognized for new features like the guided navigation on our homepage, comparison tables for our different bank products, and the updated individual pages for all of our retail locations. Additionally, our client stories initiative was recognized for highlighting the business-side of our clients, while recognizing how Sunflower Bank fulfilled their financial needs.