ClearSign Technologies Corporation that designs and develops products and technologies for the purpose of improving key performance characteristics of industrial and commercial systems, is set to join the Russell Microcap Index at the conclusion of the 2021 Russell indexes annual reconstitution, effective after the US market opens on June 28.

Membership in the Russell Microcap Index, which remains in place for one year, means automatic inclusion in the appropriate growth and value style indexes. FTSE Russell determines membership for its Russell indexes primarily by objective, market capitalization rankings and style attributes.

"We are happy to be included in this year's additions to the Russell Indexes," said Jim Deller, Chief Executive Officer, ClearSign.

"We believe this can only increase visibility and drive shareholder value as we continue with the commercialization of our technology in multiple product lines," added Deller.

Russell indexes are widely used by investment managers and institutional investors for index funds and as benchmarks for active investment strategies. Approximately $10.6 trillion in assets are benchmarked against Russell's US indexes. Russell indexes are part of FTSE Russell, a leading global index provider.