Clearsign Technologies CORP Schedule 13D activist filings
Filed when an investor crosses five percent and intends to influence the company — the activist disclosure.
NASDAQ
SCHEDULE 13D/A: Major Shareholder clirSPV LLC Increases Stake in ClearSign Technologies Through $4.3 Million Equity and Warrant Purchase
clirSPV LLC, along with its affiliates including Robert T. Hoffman Sr., has significantly increased its beneficial ownership in ClearSign Technologies Corporation through a $4.3 million purchase of common stock and warrants, maintaining its participation right.