Exhibit 21.1

SIGNIFICANT SUBSIDIARIES OF BKV CORPORATION

As of December 31, 2025

The following subsidiaries are deemed “significant subsidiaries” pursuant to Item 601(b)(21) of Regulation S-K:

Name			State or Other Jurisdiction of Incorporation or Organization
BKV Barnett, LLC			Delaware
BKV Barnett II, LLC			Texas
BKV-BPP Power, LLC			Delaware
BKV Chelsea, LLC			Delaware
BKV dCarbon Barnett Zero, LLC			Delaware
BKV dCarbon High West, LLC			Delaware
BKV dCarbon Las Tiendas, LLC			Delaware
BKV dCarbon Temple, LLC			Delaware
BKV dCarbon Ventures, LLC			Delaware
BKV Midstream, LLC			Delaware
BKV North Texas, LLC			Delaware
BKV Operating, LLC			Delaware
BKV Upstream Midstream, LLC			Delaware
BKV-BPP Cotton Cove, LLC			Delaware
BKVerde, LLC			Delaware
High West Sequestration, LLC			Louisiana
Temple Generation I, LLC			Delaware
Temple Generation II, LLC			Delaware

Note: Pursuant to Item 601(b)(21) of Regulation S-K, the registrant has omitted the names of subsidiaries, which considered in the aggregate as a single subsidiary, would not constitute a “significant subsidiary” (as defined under Rule 1-02(w) of Regulation S-X) as of the date set forth above.