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Atkins Nutritionals

A low-carbohydrate food and nutrition brand created to support the Atkins diet. Company producing low-carb foods and supplements

Last updated October 14, 2026

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Overview

Atkins Nutritionals is a food and nutrition company associated with the Atkins diet, a low-carbohydrate eating approach developed and popularized by physician Robert Atkins. The company was established to extend the diet beyond published guidance by offering packaged foods and nutritional products intended for people following the Atkins program. The business began in 1989 under the name Complementary Formulations. It was subsequently renamed Atkins Nutritionals in 1998, reflecting the growing commercial identity of the Atkins diet and the company’s role in supplying products designed around its principles. The brand’s offering has centered on low-carbohydrate packaged foods, including bars, shakes, snacks, and related nutritional products. These products were positioned as convenient options for consumers seeking to reduce carbohydrate intake while following a structured diet plan. The intellectual and commercial origins of the company are closely connected with Atkins’s own experience. Atkins developed his diet after encountering research on weight reduction, including a 1958 paper by Alfred W. Pennington. He applied ideas from that research to his own weight-management efforts and later promoted a dietary system that emphasized restricting carbohydrates. Atkins Nutritionals was created to support that system with branded products and a broader consumer proposition. The company experienced substantial growth during the early-2000s popularity of low-carbohydrate dieting. In October 2003, Parthenon Capital and Goldman Sachs acquired stakes in the business. The death of Robert Atkins in 2003 coincided with a decline in public enthusiasm for the diet and weaker demand for Atkins products. Atkins Nutritionals filed for bankruptcy protection in July 2005, reporting losses of $340 million in the account cited by the company’s encyclopedia record. It emerged from bankruptcy in 2007 under the ownership of North Castle Partners. Ownership changed again when Roark Capital Group acquired the company in 2010. In 2017, Atkins was combined with Conyers Park Acquisition Corporation through a transaction that created The Simply Good Foods Company. Atkins consequently became part of a broader publicly traded food platform rather than remaining an independent company. The brand continues to be associated with low-carbohydrate bars, shakes, snacks, and the Atkins diet framework, although detailed current operating information, headquarters information, and a standalone corporate website are not established in the supplied reference material. Ownership changed again when Roark Capital Group acquired the company in 2010. In April 2017, Conyers Park Acquisition Corporation acquired Atkins from Roark, and Atkins and Conyers Park were combined under a new corporate entity, The Simply Good Foods Company. As a result, Atkins became part of a broader publicly listed food platform rather than continuing as an independent company. The brand remains associated with low-carbohydrate bars, shakes, snacks, and the Atkins diet framework, although the supplied references do not establish detailed current operations, headquarters information, or a standalone corporate website.

History

Atkins Nutritionals originated in 1989 as Complementary Formulations. Its purpose was to commercialize products that could supplement the Atkins diet, the low-carbohydrate regimen developed and promoted by physician Robert Atkins. Atkins had drawn on weight-reduction research, including a 1958 paper by Alfred W. Pennington, when forming the dietary approach and applying it to his own weight-management experience. The company adopted the Atkins Nutritionals name in 1998. The renaming aligned the corporate identity with the increasingly recognizable Atkins diet and established the brand as a consumer-products extension of the diet rather than simply a supplier of general nutritional goods. Its product portfolio focused on packaged foods and supplements suitable for a low-carbohydrate eating plan. Bars, shakes, and snacks became the most visible categories associated with the company. Atkins Nutritionals benefited from the rise in popularity of low-carbohydrate dieting in the early 2000s. In October 2003, Parthenon Capital LLC and Goldman Sachs both acquired stakes in the company. The same year, Robert Atkins died. The subsequent weakening of public interest in the diet and reduced demand for Atkins-branded products placed pressure on the business. In July 2005, Atkins Nutritionals filed for bankruptcy, with the cited record attributing losses of $340 million to the company. The business emerged from bankruptcy in 2007 with North Castle Partners as its owner. In 2010, Roark Capital Group acquired Atkins Nutritionals. Roark’s ownership was followed by reported efforts to sell the company in 2015. In April 2017, Conyers Park Acquisition Corporation acquired Atkins from Roark. Atkins and Conyers Park were then combined under a new corporate entity, The Simply Good Foods Company. Following that transaction, Atkins became part of The Simply Good Foods Company’s portfolio. The brand remains identified with low-carbohydrate packaged foods and with the Atkins diet program. The supplied reference material does not establish a standalone headquarters, a current executive roster, a separate corporate listing status, or a definitive standalone website. Its current corporate context is therefore best described through its relationship with The Simply Good Foods Company.

  • 2017

    Formation of The Simply Good Foods Company

    [1]

    Atkins combines with Conyers Park Acquisition Corporation to create The Simply Good Foods Company.

  • 2010

    Roark Capital acquisition

    [1]

    Roark Capital Group acquires Atkins Nutritionals.

  • 2007

    Emergence from bankruptcy

    [1]

    The company emerges from bankruptcy under North Castle Partners.

  • 2005

    Bankruptcy filing

    [1]

    Atkins Nutritionals files for bankruptcy in July amid declining demand and reported losses.

  • 2003

    Institutional investors acquire stakes

    [1]

    Parthenon Capital LLC and Goldman Sachs acquire stakes in Atkins Nutritionals in October.

  • 1998

    Company adopts the Atkins Nutritionals name

    [1]

    Complementary Formulations is renamed Atkins Nutritionals, linking the corporate identity directly to the Atkins diet.

  • 1989

    Complementary Formulations is founded

    [1]

    The company that later became Atkins Nutritionals is established as Complementary Formulations to support the Atkins diet with packaged nutrition products.

Products and positioning

Convenience-oriented nutrition products built around a low-carbohydrate diet system.

  • Diet program

    Atkins diet program

    The central offering associated with the brand is the Atkins low-carbohydrate diet program. It provides the dietary framework around which the company’s packaged foods and nutritional products were developed, linking consumer guidance with convenient branded products.

  • Nutrition bars

    Atkins bars

    Low-carbohydrate packaged bars are one of the company’s principal product categories. They are designed as convenient food or snack products for consumers following the Atkins approach or seeking reduced-carbohydrate alternatives.

  • Nutrition shakes

    Atkins shakes

    Atkins shakes form part of the brand’s low-carbohydrate nutrition range. They extend the diet program into a ready-to-consume format and are positioned as convenient products within the broader Atkins eating plan.

  • Packaged snacks

    Atkins snacks

    The snack range consists of packaged foods developed for the Atkins low-carbohydrate positioning. Snacks complement the brand’s bars and shakes by offering additional convenience-oriented options for people following the diet.

  • Nutritional supplements

    Atkins nutritional supplements

    The company was created to provide products that supplemented the Atkins diet, including nutritional products associated with the program. The supplied reference does not specify a complete supplement catalog or individual formulations.

Brand decisions

  • 2017

    Combine with Conyers ParkM&A

    Background

    Roark Capital had reportedly explored a sale of Atkins, and Conyers Park Acquisition Corporation subsequently agreed to acquire the company.

    Action taken

    Atkins and Conyers Park combined under the name The Simply Good Foods Company.

    Aftermath

    Atkins became part of The Simply Good Foods Company rather than continuing as an independent corporate platform.

  • 2005

    File for bankruptcyOther

    Background

    After Robert Atkins’s death in 2003, interest in the diet and demand for Atkins products declined, contributing to significant company losses.

    Action taken

    Atkins Nutritionals filed for bankruptcy in July 2005.

    Aftermath

    The company later emerged from bankruptcy in 2007 under North Castle Partners.

    Reported losses. $340 million (At the time of the July 2005 bankruptcy filing; the cited reference reports losses of $340 million.)

  • 1998

    Adopt the Atkins Nutritionals identityStrategy

    Background

    The company had operated since 1989 as Complementary Formulations while developing products intended to support the Atkins diet.

    Action taken

    It changed its name to Atkins Nutritionals, making the diet’s name the central commercial identity of the business.

    Aftermath

    The renamed company became directly associated with packaged low-carbohydrate foods and nutritional products linked to the Atkins program.

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