The bank operated as the primary subsidiary of the Chemical Banking Corporation, a bank holding company established in 1988.

And only once in seven years has Citibank, its primary subsidiary, met its profit goal.

In 1969 the bank was reorganized as the primary subsidiary of the new First Chicago Corporation, a newly formed bank holding company.

It operated two primary subsidiaries.

First Chicago's primary subsidiary is the First National Bank of Chicago.

In 2006, CEI opened an independent campus adjacent to its primary subsidiary, with the vision of expanded research programming and ecological design systems management.

Additionally, the company currently has two primary subsidiaries: Carbon Partner and Partner Energy.

The company's primary subsidiary, Protective Life Insurance Company, was established in 1907 and now markets its products and services in all 50 states.

Torchmark's conservative investment strategies earned its primary subsidiaries the industry's highest ratings.

In April 2000, Škoda Holding, a.s. took over the helm, controlling nineteen primary subsidiaries and most product lines.