“Primary capital,” as used in this division, means the sum of common stock, perpetual preferred stock, capital surplus, undivided profits, capital reserves, and mandatory convertible debt (to the extent of 20 percent of primary capital exclusive of that debt).
Source:
Section 18018.1, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=FIN§ionNum=18018.1..