The following is a summary of net sales—standard products business (which does not include the Transitional Fab 3 Foundry Services) by geographic region, based on the location to which the products are billed (in thousands):

For the three months ended June 30, 2022 and 2021, of the Company’s net sales – standard products business in Asia Pacific (other than Korea), net sales – standard products business in China and Hong Kong represented 56.5% and 60.6%, respectively, and net sales—standard products business in Vietnam represented 26.7% and 32.0%, respectively. For the six months ended June 30, 2022 and 2021, of the Company’s net sales – standard products business in Asia Pacific (other than Korea), net sales – standard products business in China and Hong Kong represented 64.0% and 58.6%, respectively, and net sales—standard products business in Vietnam represented 20.4% and 35.0%, respectively.

Net sales from the Company’s top ten largest customers in the standard products business (which does not include the Transitional Fab 3 Foundry Services) accounted for 73% and 80% for the three months ended June 30, 2022 and 2021, respectively, and 72% and 81% for the six months ended June 30, 2022 and 2021, respectively.

For the three months ended June 30, 2022, the Company had two customers that represented 26.7% and 13.3% of its net sales – standard products business. For the six months ended June 30, 2022, the Company had two customers that represented 26.1% and 13.1% of its net sales – standard products business. For the three months ended June 30, 2021, the Company had two customers that represented 40.0% and 11.7% of its net sales – standard products business. For the six months ended June 30, 2021, the Company had two customers that represented 44.6% and 10.8% of its net sales – standard products business.

As of June 30, 2022, two customers of the Company’s standard products business accounted for 35.1% and 18.9% of its accounts receivable – standard products business (which does not include the Transitional Fab 3 Foundry Services), respectively. As of December 31, 2021, two customers of the Company’s standard products business accounted for 31.5% and 16.1% of its accounts receivable – standard products business (which does not include the Transitional Fab 3 Foundry Services), respectively.