{"entity":{"type":"insider","cik":"0001749086","url":"/insider/0001749086","json_url":"/insider/0001749086.json","name":"Princeton Opportunity Management LLC","name_source":"as-filed","also_issuer":false,"cross_url":null},"coverage_statement":{"n_transactions":4,"n_filings":2,"first":"2022-07-13","last":"2024-06-26","span_basis":"filed_date"},"name_variants":[{"name":"Princeton Opportunity Management LLC","source":"filing","n_filings":2,"first_seen":"2022-07-13","last_seen":"2024-06-26"}],"transactions":[{"id":2372379,"accession":"0001104659-24-075270","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001104659-24-075270","line_url":"/filing/0001104659-24-075270#line-1","is_derivative":false,"issuer_cik":"0001434524","issuer_name":"ClearSign Technologies Corp","issuer_ticker":"CLIR","issuer_name_source":null,"issuer_url":"/issuer/0001434524","owner_cik":null,"owner_name":"HOFFMAN Robert Thurston Sr; GPclirSPV LLC; clirSPV LLC; Princeton Opportunity Management LLC","owner_display_name":"HOFFMAN Robert Thurston Sr","owner_url":null,"role":"Ten percent owner","role_mark":null,"role_mark_label":"Not attributed","role_mark_generic":"Not stated","n_reporting_owners":4,"other_reporting_owners":3,"officer_title":null,"security_title":"Common Stock","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":3350000.0,"shares_display":"3,350,000","price_per_share":0.91,"price_display":"0.91","price_state":"stated","total_value":3048500.0,"total_display":"3,048,500.00","total_whole":"3,048,500","shares_owned_after":9539857.0,"shares_owned_after_display":"9,539,857","ownership_form":"I","is_10b5_1":null,"transaction_date":"2024-06-24","filed_date":"2024-06-26","scope":"insider"},{"id":6453585,"accession":"0001062993-22-016287","txn_seq":3,"anchor":"line-3","filing_url":"/filing/0001062993-22-016287","line_url":"/filing/0001062993-22-016287#line-3","is_derivative":false,"issuer_cik":"0001434524","issuer_name":"ClearSign Technologies Corp","issuer_ticker":"CLIR","issuer_name_source":null,"issuer_url":"/issuer/0001434524","owner_cik":null,"owner_name":"Princeton Opportunity Management LLC; HOFFMAN Robert Thurston Sr; GPclirSPV LLC; clirSPV LLC","owner_display_name":"Princeton Opportunity Management LLC","owner_url":null,"role":"Director, Ten percent owner","role_mark":null,"role_mark_label":"Not attributed","role_mark_generic":"Not stated","n_reporting_owners":4,"other_reporting_owners":3,"officer_title":null,"security_title":"Common Stock (CLIR)","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":1591594.0,"shares_display":"1,591,594","price_per_share":1.11,"price_display":"1.11","price_state":"stated","total_value":1766669.34,"total_display":"1,766,669.34","total_whole":"1,766,669","shares_owned_after":7583234.0,"shares_owned_after_display":"7,583,234","ownership_form":"I","is_10b5_1":null,"transaction_date":"2022-07-08","filed_date":"2022-07-13","scope":"insider"},{"id":6453583,"accession":"0001062993-22-016287","txn_seq":2,"anchor":"line-2","filing_url":"/filing/0001062993-22-016287","line_url":"/filing/0001062993-22-016287#line-2","is_derivative":false,"issuer_cik":"0001434524","issuer_name":"ClearSign Technologies Corp","issuer_ticker":"CLIR","issuer_name_source":null,"issuer_url":"/issuer/0001434524","owner_cik":null,"owner_name":"Princeton Opportunity Management LLC; HOFFMAN Robert Thurston Sr; GPclirSPV LLC; clirSPV LLC","owner_display_name":"Princeton Opportunity Management LLC","owner_url":null,"role":"Director, Ten percent owner","role_mark":null,"role_mark_label":"Not attributed","role_mark_generic":"Not stated","n_reporting_owners":4,"other_reporting_owners":3,"officer_title":null,"security_title":"Common Stock (CLIR)","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":0.0,"shares_display":"0","price_per_share":0.0,"price_display":null,"price_state":"not-stated","total_value":0.0,"total_display":null,"total_whole":null,"shares_owned_after":110519.0,"shares_owned_after_display":"110,519","ownership_form":"I","is_10b5_1":null,"transaction_date":"2022-07-08","filed_date":"2022-07-13","scope":"insider"},{"id":6453578,"accession":"0001062993-22-016287","txn_seq":1,"anchor":"line-1","filing_url":"/filing/0001062993-22-016287","line_url":"/filing/0001062993-22-016287#line-1","is_derivative":false,"issuer_cik":"0001434524","issuer_name":"ClearSign Technologies Corp","issuer_ticker":"CLIR","issuer_name_source":null,"issuer_url":"/issuer/0001434524","owner_cik":null,"owner_name":"Princeton Opportunity Management LLC; HOFFMAN Robert Thurston Sr; GPclirSPV LLC; clirSPV LLC","owner_display_name":"Princeton Opportunity Management LLC","owner_url":null,"role":"Director, Ten percent owner","role_mark":null,"role_mark_label":"Not attributed","role_mark_generic":"Not stated","n_reporting_owners":4,"other_reporting_owners":3,"officer_title":null,"security_title":"Common Stock (CLIR)","transaction_code":"P","transaction_label":"Open-market purchase","open_market":true,"acquired_disposed":"A","direction_word":"acquired","shares":0.0,"shares_display":"0","price_per_share":0.0,"price_display":null,"price_state":"not-stated","total_value":0.0,"total_display":null,"total_whole":null,"shares_owned_after":13153.0,"shares_owned_after_display":"13,153","ownership_form":"D","is_10b5_1":null,"transaction_date":"2022-07-08","filed_date":"2022-07-13","scope":"insider"}],"collapsed":true,"next_cursor":null,"ledger_fault":false,"count":{"value":0,"kind":"exact"},"open_market_only":false,"composition":{"kind":"exact","rows":[{"code":"P","label":"Open-market purchase","n":0,"open_market":true},{"code":"S","label":"Open-market sale","n":0,"open_market":true},{"code":"M","label":"Option exercise","n":0,"open_market":false},{"code":"A","label":"Grant or award","n":0,"open_market":false},{"code":"F","label":"Tax withholding","n":0,"open_market":false},{"code":"D","label":"Disposition to the issuer","n":0,"open_market":false},{"code":"X","label":"In-the-money option exercise","n":0,"open_market":false}],"total":0},"affiliations":[{"type":"issuer","type_label":"ISSUER","cik":"0001434524","name":"ClearSign Technologies Corp","url":"/issuer/0001434524","role":"Ten percent owner","n_filings":2,"first_seen":"2022-07-13","last_seen":"2024-06-26"}],"order_statement":"Newest transaction date first, id breaking the tie.","canonical_url":"https://ebomi.com/insider/0001749086","retrieved_at":"2026-08-24T08:47:10+00:00","coverage":{"filings":1506293,"transactions":4290787,"issuers":28597,"insiders":152303,"first_filed_date":"2003-06-30","last_filed_date":"2026-08-21","last_ingest":"2026-08-22T05:23:40.159918+00:00","counts_are":{"filings":"estimate","transactions":"estimate","issuers":"estimate","insiders":"estimate"},"source":"SEC EDGAR Form 4 filings, parsed by ebomi","fault":false},"license":{"underlying_records":"US SEC filings are public records of the United States government and are not subject to copyright. The transactional facts in them are not ours to license.","this_presentation":"The parsing, normalisation, curation, and presentation are ebomi's own work.","grant":"undecided","grant_note":"The open licence for ebomi's own layer is an open owner decision (SPEC-20260731T1159Z open question 3: CC BY 4.0 or CC0 with a citation request). Until it is taken, no grant is asserted here.","citation_request":"Balogh, A. Insider trading. Scientific Data 10, 237 (2023)","url":"https://ebomi.com/license"},"fair_use":{"policy":"These JSON endpoints are open and unauthenticated. Please read them at a human pace, identify your client in the User-Agent header, and use the published dataset for bulk work rather than crawling page by page.","bulk_alternative":"doi:10.1038/s41597-023-02147-6"}}