these cash savings. As of September 30, 2021 and December 31, 2020, Solaris Inc. recorded a payable related to the Tax Receivable Agreement of $73.5 and $68.7, respectively, $0.6 and $0.6 of which has been recorded as a current liability, respectively. The increase in payables related to the Tax Receivable Agreement is a result of Solaris Inc.’s acquisition (or deemed acquisition for United States federal income tax purposes) of Solaris LLC Units from TRA Holders during the nine months ended September 30, 2021.
7. Concentrations
For the three months ended September 30, 2021, 1 customer accounted for 26% of the Company’s revenues. For the three months ended September 30, 2020, 1 customer accounted for 28% of the Company’s revenues. For the nine months ended September 30, 2021, 1 customer accounted for 24% of the Company’s revenues. For the nine months ended September 30, 2020, 1 customer accounted for 11% of the Company’s revenues. As of September 30, 2021, 3 customers accounted for 49% of the Company’s accounts receivable. As of December 31, 2020, 4 customers accounted for 42% of the Company’s accounts receivable.
For the three months ended September 30, 2021, no supplier accounted for more than 10% of the Company’s total purchases. For the three months ended September 30, 2020, 3 suppliers accounted for 16%, 12%, and 10% of the Company’s total purchases. For the nine months ended September 30, 2021, no supplier accounted for more than 10% of the Company’s total purchases. For the nine months ended September 30, 2020, 1 supplier accounted for 32% of the Company’s total purchases. As of September 30, 2021, no supplier accounted for 10% of the Company’s accounts payable. As of December 31, 2020, 2 suppliers accounted for 23% of the Company’s accounts payable.
8. Commitments and Contingencies
In the normal course of business, the Company is subjected to various claims, legal actions, contract negotiations and disputes. The Company provides for losses, if any, in the year in which they can be reasonably estimated. In management’s opinion, there are currently no such matters outstanding that would have a material effect on the accompanying condensed consolidated financial statements.
See Note 9 “Related Party Transactions” for contingent payments related to contracts with customers.
9. Related Party Transactions
The Company recognizes certain costs incurred in relation to transactions incurred in connection with the amended and restated administrative services agreement, dated May 17, 2017, between Solaris LLC and Solaris Energy Management, LLC, a company partially owned by William A. Zartler, the Chief Executive Officer and Chairman of the Board. These services include rent paid for office space, travel services, personnel, consulting and administrative costs. For the three months ended September 30, 2021 and 2020, Solaris LLC paid $0.3 and $0.2, respectively, for these services. For the nine months ended September 30, 2021 and 2020, Solaris LLC paid $0.6 and $0.6, respectively, for these services. As of September 30, 2021, and December 31, 2020, the Company included $0.1 and $0.1, respectively, in prepaid expenses and other current assets on the condensed consolidated balance sheets. Additionally, as of September 30, 2021 and December 31, 2020, the Company included $0.1 and $0.1, respectively, of accruals to related parties in accrued liabilities on the consolidated balance sheet.
The Company has executed a guarantee of lease agreement with Solaris Energy Management, LLC, a related party of the Company, related to the rental of office space for the Company’s corporate headquarters. The total future guaranty under the guarantee of lease agreement with Solaris Energy Management, LLC is $4.5 as of September 30, 2021.
On March 26, 2021, THRC Holdings, LP (“THRC”), purchased shares representing an 8.7% ownership of the Company’s Class A common stock and 6.0% total shares outstanding as of September 30, 2021. THRC is affiliated with certain of the Company’s customers, including ProFrac Services, LLC (“ProFrac”) and FTS International and certain of the Company’s suppliers including Automatize Logistics, LLC, IOT-EQ, LLC and Cisco Logistics, LLC (“Cisco”) (together the “THRC Affiliates”). For the three and nine months ended September 30, 2021, the Company recognized revenues related to our service offering provided to the THRC Affiliates of $3.0 and $9.1, respectively. Accounts receivable related to THRC Affiliates as of September 30, 2021, were $1.9. For the three and nine months ended