For Berg, the pride in her company is clear. "I love being a part of something that took three generations to create," she said. "You can't make a fourth- or fifth-generation company in one lifetime. You can sell one, though. I have no intention of letting that happen."
Analysts of the U.S.'s mid-market companies say they operate in a culture that more often than not favors on the short term and venture capital mindsets.
"We feel that the middle market doesn't get the attention it deserves," said Doug Farren, associate director at National Center for the Middle Market, in a 2014 interview. "It truly is the economic engine of the U.S."
For Farren, family-owned businesses enjoy distinct advantages. "With the family-owned businesses in particular, there's this great sense of pride of having started and built that company into a pillar of its community," he said. "If there's any pressure it's not from Wall Street, it's from the sense of responsibility to its people."
— CNBC's Katie Little contributed to this report.