REFR
Research Frontiers Inc
$0.55
+0.02 (+3.77%)
At close · Jul 2
Market Cap
$19.09M
Shares
34,867,786
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Holders: 35
Total Value: $3,533,332
Total Shares: 3,840,595
Institutional Ownership Trend
25 quarters
Holder Concentration
Across 35 13F filers · Δ vs Dec 31, 2025Top Holder
23.9%
+1.0 pts
Top 5
75.4%
−2.1 pts
Top 10
91.5%
+1.0 pts
HHI
1,335
Broadly held−47
Quarterly Activity
vs Dec 31, 2025
New
9
Increased
6
Decreased
8
Sold Out
9
Unchanged
12
Holder count:
0
Institutional value:
-32.8%
Shares held:
-4.3%
Top Buyers
vs Dec 31, 2025| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | +33,184 | 171,786 | |
| Mid XTX Topco Ltd | +11,913 | 32,970 | |
| Mid Tower Research Capital LLC (TRC) | +3,986 | 6,055 | |
| Mega BlackRock, Inc. | +3,272 | 608,398 | |
| Mega CITIGROUP INC | +437 | 438 |
Top Sellers
vs Dec 31, 2025| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mid Kingsview Wealth Management, LLC | −58,110 | 44,950 | |
| Mega RAYMOND JAMES FINANCIAL INC | −25,052 | 17,880 | |
| Large RENAISSANCE TECHNOLOGIES LLC | −9,982 | 68,300 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC | −8,450 | 302,761 | |
| Small TWO SIGMA SECURITIES, LLC | −7,065 | 15,809 |
Top New Positions
vs Dec 31, 2025| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Mega VANGUARD CAPITAL MANAGEMENT LLC | 568,154 | $522,701 | |
| Mega VANGUARD FIDUCIARY TRUST CO | 177,030 | $162,867 | |
| Mega GOLDMAN SACHS GROUP INC | 18,506 | $17,025 | |
| Mid Focus Partners Advisor Solutions, LLC | 14,091 | $12,963 | |
| Mega Vanguard Global Advisers, LLC | 11,108 | $10,219 |
Top Sold-Out Positions
vs Dec 31, 2025| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mega VANGUARD GROUP INC | 774,479 | $1,014,566 | |
| Mega CITADEL ADVISORS LLC | 75,712 | $99,182 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 21,870 | $28,649 | |
| Mid Virtu Financial LLC | 20,798 | $27,245 | |
| Micro HALBERT HARGROVE GLOBAL ADVISORS, LLC | 15,000 | $19,650 |
| Holder | Value (USD) | % of 13F | Shares | Type | Discretion | Filed | Open | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Mid MGO ONE SEVEN LLC | $844,727 | 23.91% | 918,182 | Shares | Sole | 2026-05-14 | ||||
| Mega BlackRock, Inc. | $559,724 | 15.84% | 608,398 | Shares | Sole | 2026-05-13 | ||||
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $522,701 | 14.79% | 568,154 | Shares | Defined | 2026-05-15 | ||||
| Large Focus Partners Wealth | $456,708 | 12.93% | 496,422 | Shares | Sole | 2026-05-15 | ||||
| Mega GEODE CAPITAL MANAGEMENT, LLC | $278,539 | 7.88% | 302,761 | Shares | Defined | 2026-05-15 | ||||
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $162,867 | 4.61% | 177,030 | Shares | Defined | 2026-05-08 | ||||
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $144,242 | 4.08% | 156,786 | Shares | Other | 2026-05-15 | ||||
| Mega STATE STREET CORP | $97,173 | 2.75% | 105,623 | Shares | Defined | 2026-05-15 | ||||
| Small SHUFRO ROSE & CO LLC | $89,700 | 2.54% | 97,500 | Shares | Sole | 2026-05-15 | ||||
| Large RENAISSANCE TECHNOLOGIES LLC | $62,836 | 1.78% | 68,300 | Shares | Sole | 2026-05-14 | ||||
| Mega NORTHERN TRUST CORP Bank | $48,419 | 1.37% | 52,630 | Shares | Defined | 2026-05-14 | ||||
| Mid Kingsview Wealth Management, LLC | $41,354 | 1.17% | 44,950 | Shares | Sole | 2026-05-12 | ||||
| Mid XTX Topco Ltd | $30,332 | 0.86% | 32,970 | Shares | Defined | 2026-05-15 | ||||
| Mid HM PAYSON & CO | $18,400 | 0.52% | 20,000 | Shares | Sole | 2026-04-13 | ||||
| Micro FreeGulliver LLC | $18,400 | 0.52% | 20,000 | Shares | Sole | 2026-05-15 | ||||
| Mega GOLDMAN SACHS GROUP INC | $17,025 | 0.48% | 18,506 | Shares | Defined | 2026-05-15 | ||||
| Mega RAYMOND JAMES FINANCIAL INC | $16,449 | 0.47% | 17,880 | Shares | Defined | 2026-05-14 | ||||
| Small TWO SIGMA SECURITIES, LLC Broker-Dealer | $14,544 | 0.41% | 15,809 | Shares | Sole | 2026-05-15 | ||||
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $13,800 | 0.39% | 15,000 | Call | Other | 2026-05-15 | ||||
| Mid Focus Partners Advisor Solutions, LLC | $12,963 | 0.37% | 14,091 | Shares | Other | 2026-05-13 | ||||
| Large MERCER GLOBAL ADVISORS INC /ADV | $12,880 | 0.36% | 14,000 | Shares | Sole | 2026-05-15 | ||||
| Large Schonfeld Strategic Advisors LLC | $12,748 | 0.36% | 13,857 | Shares | Sole | 2026-05-15 | ||||
| Mega JANE STREET GROUP, LLC | $10,648 | 0.30% | 11,575 | Shares | Defined | 2026-05-12 | ||||
| Mega Vanguard Global Advisers, LLC | $10,219 | 0.29% | 11,108 | Shares | Defined | 2026-05-08 | ||||
| Micro Farrell Financial LLC | $9,620 | 0.27% | 10,457 | Shares | Sole | 2026-04-13 | ||||
| Mid HB Wealth Management, LLC | $9,200 | 0.26% | 10,000 | Shares | Sole | 2026-04-27 | ||||
| Mid Tower Research Capital LLC (TRC) | $5,570 | 0.16% | 6,055 | Shares | Defined | 2026-05-15 | ||||
| Large OSAIC HOLDINGS, INC. | $3,680 | 0.10% | 4,000 | Shares | Defined | 2026-05-15 | ||||
| Mega MORGAN STANLEY | $3,620 | 0.10% | 3,935 | Shares | Defined | 2026-05-15 | ||||
| Mid MAI Capital Management | $1,380 | 0.04% | 1,500 | Shares | Sole | 2026-05-15 | ||||
| Mega UBS Group AG | $1,080 | 0.03% | 1,174 | Shares | Defined | 2026-05-05 | ||||
| Mega JPMORGAN CHASE & CO | $958 | 0.03% | 1,042 | Shares | Defined | 2026-05-13 | ||||
| Mega CITIGROUP INC | $402 | 0.01% | 438 | Shares | Defined | 2026-05-11 | ||||
| Mid SIMPLEX TRADING, LLC | $305 | 0.01% | 332 | Shares | Sole | 2026-05-14 | ||||
| Micro Fairman Group, LLC | $115 | 0.00% | 125 | Shares | Sole | 2026-04-23 | ||||
| Mid SBI Securities Co., Ltd. Broker-Dealer | $4 | 0.00% | 5 | Shares | Defined | 2026-04-28 | ||||
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