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Investments
6 Months Ended
Jun. 30, 2024
Investments in and Advances to Affiliates [Abstract]  
Investments INVESTMENTS
Our investments as of June 30, 2024 and December 31, 2023 consist of the following:
June 30, 2024December 31, 2023
(in thousands)
Investment in Kodiak(1)
$12,279 $8,538 
Investment in CarbonFree6,798 6,850 
Investment in Standard Lithium1,000 1,616 
Other investments
350 350 
Total Investments$20,427 $17,354 
(1) Kodiak Gas Services, Inc. (NYSE: KGS) (“Kodiak”) acquired CSI Compressco LP (“CSI Compressco”) on April 1, 2024.
CarbonFree Chemicals Holdings LLC (“CarbonFree”) is a carbon capture company with patented technologies that capture CO2 and mineralize emissions to make commercial, carbon-negative chemicals. In December 2021, we invested $5.0 million in a convertible note issued by CarbonFree. During the three month period ended March 31, 2024, the convertible note agreement was amended and, in connection with that amendment, note holders agreed to defer their right to electively convert the convertible notes to common units of CarbonFree (“CarbonFree Units”) for two years. In exchange for the amendment, we received CarbonFree Units representing less than 1% of the CarbonFree Units outstanding as of June 30, 2024. The CarbonFree Units are not publicly traded and may not be offered, sold, transferred or pledged until such common units are registered pursuant to an effective registration statement or pursuant to an exemption from registration. Our exposure to potential losses by CarbonFree is limited to our investment, including capitalized and accrued interest associated with the CarbonFree convertible note and CarbonFree Units.

We are party to agreements whereby Standard Lithium Ltd. (NYSE: SLI) (“Standard Lithium”) has the rights to produce and extract lithium in a portion of our Arkansas leases. The Company received stock of Standard Lithium under the terms of its arrangements.

See Note 7 - “Fair Value Measurements” for further information.