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YellowStone Board of Directors

Sean Simpson


Sean Simpson has been with PIPESTONE since 2012 serving as General Counsel and Chief Strategy Officer. Sean has recently transitioned into the role of President of Pipestone Holdings’ Partnership Division. Sean obtained a Bachelor of Arts degree from the University of Iowa and his Juris Doctor degree (Magna Cum Laude) from Hamline University School of Law. Outside of his roles at PIPESTONE, Sean keeps busy with his wife and 3 sons.



Tyson Cure and Greg Cure, of Cure Land & Cattle, are cousins who were born and raised on a family cattle feeding operation.  The operation stands as a third-generation family-owned agricultural business operating mostly on the Eastern Plains of Colorado. With beginnings dating back to the early 1970s, the operation has become a vertically-integrated group of companies focused on corn, wheat, and beef production.  


Tyson and Greg were each raised as the eldest of six children within their respective families. Growing up on a family farm allowed them to obtain extensive knowledge and experience in the agricultural industry, but more importantly, it taught them many valuable life lessons.


Tyson earned his Ag Business degree from Northeastern Junior College in Sterling, CO in 2004.  Tyson currently lives near Idalia, CO with his wife and six children where he manages a feedlot, farm, and trucking operation.  



Greg attended Chadron State College in Chadron, NE.  He obtained a business degree while balancing college athletics.   He returned to the family operation in 1999.  He now lives in Goodland, KS with his wife and five children.  He currently serves as the Chief Operating Officer for Cure Land & Cattle.


casey & shelly cowan

Casey has gained valuable experience in lending, management, leadership and ownership position throughout a 30-year community banking career. As a shareholder, director and leader managing a community bank, Casey was responsible and involved in all aspects. This includes budgeting, financial reporting, compliance, asset liability management, lending and policy development, and dealing with both FDIC and SD State Division of Banking regulations and regulators. 


Casey and his wife, Shelly, currently operate a small retail beef operation, Cowan Ranch Beef, in conjunction with a family cow/calf, backgrounding and small cattle finishing operation in Pierre, South Dakota along Lake Oahe on the Missouri River. 


In addition to his current Ag Banking career with First Dakota National Bank, Casey serves as Chairman of the Ft Pierre Tourism and Promotion Council and as a Director of Beef Logic Inc., a non-profit organization with the purpose of promoting beef and the Build Your Base with Beef Program. 

Luke Minion


Dr. Luke Minion grew up in southwestern Minnesota and began his career with Pipestone Veterinary Services in 2000 after graduating from the University of Minnesota’s College of Veterinary Medicine.¬†


Dr. Minion served many years as CEO and Chairman of Pipestone Holdings. Today, he serves as CEO and Chairman of the Board for Wholestone Farms. Dr. Minion and his wife, Betsy, enjoy golfing and keeping up with their son, Landon, and twin daughters, Claire and Lauren.

Chuck Weinreis

Weinreis brothers gp

In a family of twelve siblings, Chuck Weinreis is is the oldest of seven brothers. The brothers formed Weinreis Brothers Partnership in 1975.  His grandparents homesteaded in SW North Dakota in the early 1900’s.  This area has been one of our headquarters ever since.

Weinreis Brothers primary business is farming and ranching with operations in ND, SD, WY, CO and NE, but also have interests in energy, ethanol production and recreational developments including hunting and fishing lodges.


Cattle activity includes all facets from cow/calf- including raising our own bulls, yearlings on grass, finishing cattle-basically conception through slaughter.  Weinreis Brothers has several backgrounding yards and are part of the ownership group of the Dinklage Feeding Organization.


Presently Weinreis Brothers consists of the seven brothers who started the partnership.  They have eight second generation sons in the operation.


After spending a lifetime in this field or industry, Chuck truly believes the only way to have some control over our destiny is to own and control the slaughter facility.  He believes that he owes it to his family and all families in the industry to do all he can to make this happen.  It is time we stop the flow of our young people leaving this nation’s farms and ranches just so they can make a living.

Jerry Niewohner

Jerry niewohner

Coming soon…

scott & Brad foote

Foote Cattle Company

Scott and Brad Foote grew up on a farm and feedlot south of Kansas City in the small town of Bucyrus, KS. They both attended Kansas State University where Scott graduated with a Agricultural Economics degree in 1997 and later received his master’s degree in 2001.  Brad graduated with a Bachelor’s degree in Animal Science in 1999.


After graduating, Scott moved to Hoxie, KS where he began to oversee Hoxie Feedyard and has help grown the family business to include multiple feedyards, farming, and banking across the state of Kansas.


Scott loves spending time with his family enjoying many each other’s company generally involving a good steak and quality football game.  


Brad joined the family business after his graduation back in Bucyrus and in 2007 moved to Imperial, NE were he helps oversee the Foote Cattle Company Feedyards in NW Kansas and SW Nebraska


In his spare time, Brad loves spending time with his wife, kids, nieces and nephews on the water and at the many high school and college football games they attend.


4M Feeders

Dr. Matthew May was raised on a diversified farming and feedlot operation in Stratton Colorado.  He received an Associate of Science (A.Sc) in Animal Science in 2003 from Northeastern Junior College, Bachelor of Science (B.Sc) in Animal Science in 2005 from Kansas State University, Manhattan Kansas.  He received a (M.Sc.) in Animal Science in 2008 from Kansas State University, Manhattan, Kansas.  While at Kansas State, his research focused on the effects of corn grain processing when adding distillers grain to the diet on cattle performance, carcass characteristics and ruminal fermentation.  Dr. May received his Ph.D. (Animal Science) in 2010 from Texas Tech University, Lubbock, Texas.  While at Texas Tech, his research focused on including wet distillers grains and roughage concentration in steam-flaked corn based diets and their effects on steer performance, carcass characteristics, apparent total tract digestion, and hydrogen sulfide production in vitro.  


Dr. May became associated with Feedlot Health Management Services Ltd. in 2010 as a Feedlot Nutrition and Production Consultant.  Dr. May currently is the Director of Production Services for Feedlot Health by Telus Agriculture and interacts closely with other consultants and clients to help deliver production service modules in North America.  Since moving back to Stratton, Matt has a played a more active role in some portions of the family business primarily in feedlot operations and ranch logistics.  Matt and his wife Jen reside in Stratton Colorado with their 4 children, which keep them both very busy.