Historical shareholding details of CAMBRIDGE Invest RESEARCH ADVISORS, INC. holdings in Research Frontiers Inc. (REFR)

Monthly changes of CAMBRIDGE Invest RESEARCH ADVISORS, INC. shareholding in Research Frontiers Inc. over the previous months

Month	Name	Total no. shares held	Percent Holding
Month	Name	Total no. shares held	Percent Holding
Dec 31, 2024	Cambridge Invest Research Advisors, Inc.	12,000	0.04%

Sep 30, 2024	Cambridge Invest Research Advisors, Inc.	12,000	0.04%

Jun 30, 2024	Cambridge Invest Research Advisors, Inc.	12,000	0.04%

Mar 31, 2024	Cambridge Invest Research Advisors, Inc.	12,000	0.04%

Dec 31, 2023	Cambridge Invest Research Advisors, Inc.	0	0.00%

Sep 30, 2023	Cambridge Invest Research Advisors, Inc.	12,166	0.04%

Jun 30, 2023	Cambridge Invest Research Advisors, Inc.	12,166	0.04%

Mar 31, 2023	Cambridge Invest Research Advisors, Inc.	15,166	0.05%