And now there is one.
With the Carlson family signing a deal to sell its hotel division to a Chinese conglomerate, the lone corporate division under the second- and third-generation shareholders lies with Carlson Wagonlit Travel, one of the world's top two corporate travel managers.
And CWT, as it's widely known, is embarking on a new chapter as well.
Just a week before announcing the sale of the hotel group, CWT replaced its Chief Executive Doug Anderson "with immediate effect" after eight years on the job and installed travel industry veteran Kurt Ekert.
The change at the top came on the heels of a less-than-stellar year, after the company reported overall sales of $24.2 billion in 2015, down from $27.3 billion the year before. Anderson had attributed some of the drop to a reduction in travel expenses by energy customers affected by declining energy prices.
Despite CWT's dip, the corporate travel business has been relatively steady over the years, though it can be affected by shivers in the global economy, said Paul Tilstone, managing partner of business travel consulting company Festive Road.
Over the past few years, CWT has been a "quiet achiever" in the industry with a reputation for investing in staff and technology, which is critical in today's market, Tilstone said. Younger travelers especially are expecting better and more personalized services and tools to help them have travel experiences that can sometimes mix business with leisure, he said.
The company's "CWT To Go" mobile app experienced 62 percent growth in user registrations to 560,000 in 2015.