Research Frontiers Inc
REFR- Exchange
- Nasdaq
- Industry
- Patent Owners & Lessors
- SEC CIK
- 0000793524
No open-market purchases or sales by Research Frontiers Inc insiders were filed in the last 90 days; 34 institutions reported holding it in 13F filings for Q2 2026, worth $1.91M in total; no superinvestor holds it.
Holders of 5% or more of REFR
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Research Frontiers Inc, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Morgan Stephen L. | 13G | 6.90%2.33M shares | New | Oct 17, 20251 filing | Oct 17, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
1 Schedule 13D or 13G filing on Research Frontiers Inc, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Oct 17, 20253:15 PM ET | Morgan Stephen L. | 13G | 6.90%2.33M shares | New | Sep 30, 2025 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Research Frontiers Inc shares.
No Form 144 notices for Research Frontiers Inc are on file.