Question: J. Barry Griswell is the Chairman and CEO of a company headquartered in which US State?

Context paragraphs:
Prasco Laboratories: Prasco is a pharmaceutical company headquartered in Cincinnati, Ohio, and founded in 2002 by E. Thomas Arington, former Chairman and CEO of Duramed Pharmaceuticals and former president of the healthcare consulting firm MarketMaster.  The company remains privately held.  It specializes in the field of authorized generics, generic drugs manufactured by the branded innovator company but marketed under a private label.  According to IMS Health, the pharmaceutical industry auditing service, Prasco is one of the fastest growing pharmaceutical companies in the industry, in terms of relative growth and prescriptions dispensed for the years 2005 and 2006.  Although it does not release financial data, $150 million in sales were tracked by an independent consulting company during 2005, reportedly doubling the previous years' figures.

Allen &amp; Company Sun Valley Conference: The Allen & Company Sun Valley Conference is an annual media finance conference hosted and wholly independently funded by private investment firm Allen & Company.  The conference has taken place in Sun Valley, Idaho for one week each July since 1983.  The conference typically features business leaders, political figures, and major figures in the philanthropic and cultural spheres.  Previous conference guests have included Bill and Melinda Gates, Warren and Susan Buffett, Tony Blair, Google founders Larry Page and Sergey Brin, Allen alumnus and former Philippine Senator Mar Roxas, Google Chairman Eric Schmidt, Yahoo! co-founder Jerry Yang, Facebook founder Mark Zuckerberg, Media Mogul Rupert Murdoch, eBay CEO Meg Whitman, BET founder Robert Johnson, Time Warner Chairman Richard Parsons, NBA player LeBron James, Governor Chris Christie, entertainer Dan Chan, Katharine Graham of "The Washington Post", Diane Sawyer, InterActiveCorp Chairman Barry Diller, Linkedin co-founder Reid Hoffman, Sandro Salsano from Salsano Group, and Washington Post CEO Donald E. Graham, and Oprah.

J. Barry Griswell: J. Barry Griswell is former Chairman and CEO of the Principal Financial Group and retired CEO of the Community Foundation of Greater Des Moines.

24/7 Media: 24/7 Media, formerly 24/7 Real Media is a technology company headquartered in New York City and 20 offices in 12 countries, specializing in Digital Marketing.  It provides new type of digital technology marketing solutions for publishers, advertisers and agencies globally.  It was formerly listed as "TFSM" on the NASDAQ stock exchange.  The company was purchased by WPP plc in 2007 for $649 million.  David J. Moore is the Chairman, Founder & CEO.  He also served as chairman of the Interactive Advertising Bureau.  In December, 2013, 24/7 Media announced it would merge with GroupM subsidiary, Xaxis.

Blacksands Pacific: The Blacksands Pacific Group is an international oil and gas exploration and production and trading company headquartered in Los Angeles and Houston, with assets in North America, Asia and Africa.  The company also transports, stores, purchases and markets crude oil and natural gas.  The Chairman and CEO of Blacksands Pacific is Raheem J. Brennerman.

Science Applications International Corporation: Science Applications International Corporation (SAIC) is an American company headquartered in Reston, Virginia that provides government services and information technology support.  The original SAIC was created in 1969 by J. Robert Beyster.  Then on September 27, 2013, it spun off a $4 billion unit which retained its name, while the parent company changed its name to Leidos.  Following the split, Anthony J. Moraco was appointed CEO of SAIC, and John P. Jumper was appointed CEO of Leidos.  The primary motivation for the spinoff was the conflicts of interest provisions in the Federal Acquisition Regulations which prevented the company from bidding on some new contracts because of existing contracts.

Principal Financial Group: The Principal Financial Group is a global financial investment management leader headquartered in Des Moines, Iowa.

LC Singh: LC Singh is the Vice Chairman and CEO of Nihilent Technologies Ltd. , a global integrated change management company headquartered at Pune, India.  Singh founded Nihilent in the year 2000.  Singh is an alumnus of the Institute of Technology (Banaras Hindu University) ,Varanasi] and Harvard Business School, and has contributed significantly towards building the Indian IT brand worldwide.  Singh performed key roles at Tata Consultancy Services (TCS).  At the time of leaving the company, he was the Senior Vice President, in charge of operations for UK, South Africa and the Middle East.  He briefly worked with Zensar Technologies as President and CEO.  He is the author of Nihilent's patented change management framework MC³ and 14Signals (a patented framework on Customer Loyalty Evaluation).  He is an internationally internationally recognized thought leader on design & systems thinking, and is an invited speaker at global conferences on Design Thinking, Change Management, and Digital Disruption.  Singh is a Fellow of The Institute of Management Consultants of India (IMCI) and Computer Society of India (CSI).  He scripted and produced the movie Banaras, A mystic love story.  He continues to be a student of ontology and epistemology

The Adversity Paradox: The Adversity Paradox is a business book written by J. Barry Griswell and Bob Jennings.  Released in April 2009, the book was published by St. Martin’s Press.  The book debuted at #8 on "The Wall Street Journal" Best Seller List.

Robert A. Funk: Robert A. Funk is the founder, CEO, and Chairman of the Board of Express Employment Professionals, an employment agency company headquartered in Oklahoma City.  He owns various enterprises, including sports teams, through his Express subsidiaries and is also a philanthropist who sits on the governing boards of multiple organizations.  He also served as chairman of the Federal Reserve Bank in Kansas City.

Supporting paragraphs: J. Barry Griswell Principal Financial Group
Answer: Iowa