Concentration of Risks and Significant Customers

12 Months Ended

Dec. 31, 2021

Concentration of Risks and Significant Customers

Concentration Risks and Significant Customers

Financial instruments that potentially expose the Company to concentration of credit risk consist of cash and cash equivalents, marketable securities, accounts receivable and unbilled Customers' receivable, or collectively, Customers' receivables, and settlements receivable. Cash on deposit with financial institutions may, at times, exceed federally insured limits. Management believes that these financial institutions are financially sound and, accordingly, minimal credit risk exists. Cash and cash equivalents as of December 31, 2021 and December 31, 2020 included $1.2 billion and $203.6 million, respectively, of investments in three money market mutual funds which invest primarily in securities issued by the U.S. Government or U.S. Government agencies.

As of December 31, 2021, marketable securities were $452.9 million, and there was no concentration of securities of the same issuer with an aggregate fair value greater than 5% of this total balance, except for U.S. Treasuries, which amounted to $418.3 million, or 92% of the marketable securities. All debt securities within the Company's marketable securities portfolio are investment grade.

As of December 31, 2020, marketable securities were $149.9 million, and there was no concentration of securities of the same issuer with an aggregate fair value greater than 5% of the total balance, except for U.S. Treasuries, which amounted to $125.9 million, or 84% of the marketable securities.

A significant portion of the Company's payment transactions is settled through one Issuing Bank, Sutton Bank. For the years ended December 31, 2021, 2020 and 2019, 90%, 96% and 97% of Total Processing Volume, which is the total dollar amount of payments processed through the Company’s Platform, net of returns and chargebacks, was settled through Sutton Bank, respectively.

For each significant Customer, net revenue as a percentage of total net revenue and customers' receivables as a percentage of total customers' receivables are as follows:


	Percent of Net Revenue for the Year Ended December 31,
	2021	2020	2019
Customer A	69%	70%	60%
Customer B	*	*	11%
* Less than 10%


	Percent of Customers' Receivables as of December 31,
	2021	2020
Customer C	20%	*
Customer D	13%	*
Customer E	*	14%
* Less than 10%