Equity security is owned by an equity partner of an organization formed as LLC, C-Corp, S-Corp, etc.
In public markets, many companies only have equity security as common stock on their balance sheet.
Preferred Stock is an equity security with certain economic rights and preferences, or privileges, over common stock.
Liquidation Preference is paid first to the preferred stockholders after debt holders and typically reflects the total sum capital contributed by the preferred stockholders.
Conversion Rights, or the ability to convert their preferred stock share for a share of common stock, allows preferred stockholders to maintain their parity.
Dividends afford the preferred shareholder a method to accrue value over time.
Conversion Ratio is defined as the OIP / conversion price and can be negotiated by reducing the conversion price.
Participation bridges the gap between liquidation preference and conversion rights with full participation being rare.
A participation cap will be negotiated to allow for equal upper end of positive returns but still allows preferred stock to receive some extra benefit in the middle.
Preferred stock would elect to convert to common, and the total distribution would be split pro rata between common and preferred, if the distribution out to common would result in a higher per value share of common stock than preferred.