Research Frontiers Incorporated REFR

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Research Frontiers Incorporated - Common Stock · Company · Nasdaq

Paper trade (simulated — no real money)

Fill: USD 0.4600 · FX 1 USD = 1.290100 SGD · about SGD 0.5934 per unit

Sign in to place simulated trades. USD fills are converted into the SGD portfolio at the displayed rate.

Announcement types: (default: consequential filings)
Results & current reports
Capital markets
Ownership & governance

USD closing-price chart (daily close from yfinance · Last year)

USD 1.71 → 0.46 · -73.1%
2.3601.4100.460 1 2 3 4 5 6 7 8 9 10 Jul 25Oct 25Jan 26Apr 26Jul 26

Numbered dotted lines mark the filtered filings under Announcement Events below.

Price & SEC Filing History 26 Jul 2025 — 27 Jul 2026 (Last year)

Daily Nasdaq prices are sourced from yfinance. Yellow highlighting marks an intraday rise or a gap up between adjacent trading sessions. SEC acceptance times are converted to US Eastern time: pre-market filings appear below that day’s OHLCV row; filings accepted after the 09:30 ET open appear above it. The SEC does not publish an exact first-public-availability timestamp, so acceptance time is the best available proxy.

No data yet
Weekend
Weekend
0.4800 0.5000 0.4600 0.4600 21,100
0.4800 0.5400 0.4500 0.4800 97,700
0.5100 0.5200 0.4800 0.4900 33,500
0.5800 0.5800 0.5100 0.5100 22,700
0.5600 0.5600 0.4600 0.5100 47,200
Weekend
Weekend
0.5400 0.5500 0.4800 0.5500 119,300
0.5300 0.6000 0.5300 0.5300 22,100
0.5400 0.5800 0.5400 0.5500 45,900
0.5600 0.6000 0.5400 0.5500 32,300
0.5300 0.5900 0.5300 0.5400 25,100
Weekend
Weekend
0.5500 0.5900 0.5300 0.5500 58,300
0.5300 0.5300 0.5000 0.5300 119,300
0.5300 0.5500 0.5300 0.5400 25,700
0.5500 0.5600 0.5300 0.5400 30,400
0.5700 0.5700 0.5200 0.5400 50,500
Weekend
Weekend
No trading
0.5800 0.5800 0.5000 0.5500 54,600
0.5200 0.5900 0.5000 0.5300 86,100
0.5500 0.5900 0.5200 0.5200 171,400
0.5400 0.5500 0.5100 0.5500 111,200
Weekend
Weekend
0.5900 0.5900 0.4800 0.4800 135,000
0.6000 0.6500 0.5500 0.6200 73,600
0.6500 0.6500 0.5900 0.6200 46,200
0.6200 0.6300 0.6100 0.6100 10,400
0.6000 0.6300 0.6000 0.6100 41,800
Weekend
Weekend
No trading
0.6400 0.6600 0.6000 0.6000 65,300
0.6800 0.7000 0.6400 0.6400 15,900
0.6400 0.7100 0.6300 0.6700 90,300
0.7000 0.7500 0.6500 0.6500 67,700
Weekend
Weekend
0.7500 0.7500 0.7100 0.7100 24,600
10 · 8-K Pre-market · 02:02 ET 8-K ↗
0.7500 0.7500 0.7200 0.7400 15,400
0.7500 0.7800 0.7300 0.7300 64,700
0.7300 0.8100 0.7300 0.7300 41,400
0.7400 0.7600 0.7200 0.7300 24,600
Weekend
Weekend
9 · 8-K After market open · 13:00 ET 8-K ↗
0.7500 0.7700 0.7200 0.7400 30,400
0.7700 0.7800 0.7500 0.7500 13,700
0.7500 0.7900 0.7500 0.7600 12,300
0.7500 0.7900 0.7500 0.7600 9,400
0.8200 0.8200 0.7500 0.7700 18,800
Weekend
Weekend
0.7700 0.7700 0.7600 0.7700 22,100
0.7500 0.7700 0.7400 0.7600 53,400
0.7500 0.7500 0.7400 0.7500 10,100
0.7400 0.7900 0.7300 0.7600 26,800
No trading
Weekend
Weekend
0.7600 0.7600 0.7400 0.7500 8,800
0.7700 0.7900 0.7300 0.7400 16,300
0.7700 0.8000 0.7300 0.7500 35,800
0.8200 0.8200 0.7600 0.7700 16,900
0.7900 0.8000 0.7800 0.7900 13,000
Weekend
Weekend
0.8100 0.8100 0.7800 0.8000 19,600
0.7800 0.8300 0.7800 0.8100 15,800
0.8100 0.8600 0.7900 0.7900 67,000
0.7900 0.7900 0.7600 0.7800 27,600
0.9000 0.9000 0.7600 0.7600 80,300
Weekend
Weekend
0.8900 0.8900 0.7500 0.7500 75,500
8 · 10-Q Next filing day · accepted 07 May, 14:19 ET 10-Q ↗
0.8700 0.9900 0.8300 0.8300 90,700
0.9900 0.9900 0.8800 0.8800 27,500
0.8700 0.9500 0.8600 0.8700 28,600
0.8800 0.9400 0.8300 0.8700 95,500
Weekend
Weekend
0.9200 0.9200 0.8700 0.8800 58,400
7 · DEF 14A After market open · 12:01 ET DEF 14A ↗
0.9500 0.9600 0.9100 0.9200 67,100
0.9300 0.9500 0.9300 0.9400 2,500
0.9300 0.9800 0.9300 0.9400 25,200
0.9900 0.9900 0.9400 0.9500 7,900
Weekend
Weekend
1.0100 1.0200 0.9300 0.9600 26,900
0.9900 1.0200 0.9900 1.0000 10,900
0.9700 1.0200 0.9700 0.9700 6,600
1.0000 1.0200 0.9800 0.9900 37,700
0.9300 1.0000 0.9300 1.0000 23,500
Weekend
Weekend
0.9500 0.9500 0.9300 0.9300 4,900
0.9100 0.9500 0.9100 0.9400 17,300
1.0100 1.0100 0.9100 0.9100 40,000
0.9100 1.0200 0.9100 1.0200 94,600
0.9500 0.9700 0.9200 0.9300 17,700
Weekend
Weekend
0.9700 0.9700 0.9600 0.9600 4,600
0.9300 0.9700 0.9100 0.9400 35,900
0.9800 0.9800 0.9200 0.9200 35,200
0.9200 0.9700 0.9100 0.9300 20,700
0.9300 0.9700 0.9000 0.9400 6,200
Weekend
Weekend
No trading
0.9300 0.9300 0.9000 0.9300 2,300
0.9400 0.9700 0.9400 0.9500 8,500
0.8700 0.9600 0.8700 0.9200 16,800
0.8900 0.9400 0.8800 0.9100 6,400
Weekend
Weekend
0.8700 0.9400 0.8700 0.8900 9,300
0.8600 0.9100 0.8600 0.9000 31,700
0.8700 0.9700 0.8200 0.8300 91,900
0.8600 0.9000 0.8500 0.8500 20,500
0.8600 0.9000 0.8600 0.8600 36,500
Weekend
Weekend
1.0200 1.0300 0.8000 0.8000 172,700
6 · 10-K/A After market open · 12:01 ET 10-K/A ↗
1.0100 1.0200 1.0000 1.0200 13,800
1.0200 1.0300 1.0000 1.0000 22,300
1.0000 1.0300 1.0000 1.0000 10,300
1.0000 1.0300 1.0000 1.0100 30,600
Weekend
Weekend
1.0100 1.0100 1.0000 1.0100 30,000
0.9300 1.0200 0.9200 1.0200 27,900
0.9300 0.9500 0.9000 0.9000 25,700
0.9700 0.9700 0.9200 0.9300 40,100
0.9600 0.9700 0.9400 0.9400 20,800
Weekend
Weekend
0.9900 1.0100 0.9600 0.9800 48,000
5 · 10-K After market open · 11:01 ET 10-K ↗
1.0500 1.0500 0.9900 0.9900 41,000
1.0000 1.0500 1.0000 1.0100 13,100
1.0100 1.0900 0.9800 1.0100 23,100
1.0200 1.1000 1.0200 1.0300 20,500
Weekend
Weekend
1.0300 1.0500 0.9800 1.0000 87,300
1.1400 1.1400 0.9800 0.9800 76,000
1.1300 1.1300 1.1100 1.1100 5,500
1.1200 1.1200 1.0700 1.1000 13,600
1.1300 1.1300 1.1000 1.1100 15,700
Weekend
Weekend
1.0300 1.1300 1.0300 1.1100 48,000
1.0100 1.0500 1.0100 1.0300 18,600
4 · 8-K After market open · 12:30 ET 8-K ↗
1.0400 1.0900 1.0000 1.0100 33,800
1.0200 1.1200 1.0200 1.0200 8,200
No trading
Weekend
Weekend
1.0400 1.0900 0.9800 1.0000 72,500
1.0500 1.0800 1.0100 1.0300 33,900
1.0500 1.0600 1.0200 1.0400 46,400
1.0200 1.0800 1.0200 1.0400 14,400
1.1100 1.1700 1.0000 1.0300 134,300
Weekend
Weekend
1.1100 1.2500 1.1100 1.1200 26,500
1.1300 1.1400 1.0900 1.1300 30,800
1.1500 1.1800 1.1100 1.1300 18,000
1.1500 1.2000 1.1500 1.1600 25,800
1.1800 1.2100 1.1400 1.1400 50,200
Weekend
Weekend
1.2000 1.2300 1.1400 1.2000 83,000
1.2500 1.3200 1.2000 1.2000 74,800
1.2700 1.2900 1.2300 1.2700 17,500
1.2900 1.3000 1.2500 1.2800 46,500
1.2900 1.3100 1.2100 1.3000 64,800
Weekend
Weekend
1.2700 1.3200 1.2600 1.2700 29,600
1.2200 1.3100 1.2100 1.2700 111,200
1.2300 1.3000 1.2100 1.2400 70,000
1.3200 1.3400 1.2500 1.2700 41,200
No trading
Weekend
Weekend
1.3300 1.3800 1.3000 1.3300 43,000
1.3500 1.4000 1.3000 1.3200 19,300
1.3400 1.3700 1.3200 1.3600 21,400
1.3100 1.3400 1.3100 1.3300 14,600
1.2800 1.3400 1.2800 1.2800 22,300
Weekend
Weekend
1.2700 1.3500 1.2000 1.2500 85,900
1.3100 1.3400 1.2700 1.2700 55,200
1.3500 1.4300 1.2700 1.2900 23,300
1.3100 1.3500 1.3100 1.3200 22,500
1.2800 1.4400 1.2700 1.3200 42,000
Weekend
Weekend
1.3100 1.3100 1.2600 1.2800 46,900
No trading
1.3100 1.3400 1.2600 1.3100 85,200
1.3600 1.3600 1.3000 1.3200 48,500
1.3600 1.4500 1.3100 1.3700 148,700
Weekend
Weekend
1.4100 1.4900 1.3000 1.3800 96,000
No trading
1.4000 1.4200 1.3600 1.3900 16,700
1.5000 1.5000 1.3600 1.4100 62,800
1.5000 1.5400 1.4100 1.4500 77,100
Weekend
Weekend
1.5200 1.5300 1.4200 1.4600 100,100
1.4600 1.4800 1.2700 1.4800 102,000
1.4900 1.5300 1.4200 1.4400 36,600
1.5000 1.5200 1.4400 1.4800 51,000
1.5200 1.5900 1.5000 1.5600 60,900
Weekend
Weekend
1.5900 1.5900 1.5200 1.5400 30,300
1.5700 1.6200 1.5400 1.5600 32,100
1.5900 1.6300 1.5700 1.5800 48,500
1.5800 1.6900 1.5600 1.5900 41,500
1.6400 1.6500 1.5500 1.5900 60,100
Weekend
Weekend
1.6300 1.6500 1.5200 1.6200 66,500
1.6400 1.6500 1.5600 1.5700 34,800
1.6200 1.7100 1.5600 1.6500 46,300
1.8500 1.8500 1.6000 1.6300 52,500
1.7500 1.9200 1.7500 1.7800 16,900
Weekend
Weekend
1.9700 1.9700 1.8400 1.8900 24,200
No trading
2.0100 2.0100 1.8500 1.9100 35,400
2.0800 2.0800 1.9000 1.9300 22,700
1.9100 2.1000 1.8400 2.0800 154,700
Weekend
Weekend
1.7300 2.0000 1.6800 1.9900 97,400
1.7900 1.8500 1.7200 1.7600 53,300
1.7600 1.7900 1.7500 1.7600 25,200
1.5800 1.7200 1.5800 1.7000 23,300
1.7700 1.8500 1.6200 1.6200 77,000
Weekend
Weekend
1.7000 1.9300 1.6600 1.8100 96,900
1.7000 1.8700 1.5700 1.8700 113,100
1.7500 1.8900 1.6800 1.8000 43,400
1.5800 1.7400 1.5700 1.7400 36,700
1.5800 1.6200 1.5300 1.5700 83,700
Weekend
Weekend
1.6500 1.6500 1.5400 1.5800 96,500
3 · 10-Q After market open · 11:02 ET 10-Q ↗
1.6900 1.8900 1.6000 1.6000 41,500
1.8000 1.8400 1.7100 1.7100 46,900
1.8300 1.8900 1.7500 1.7500 63,800
1.9500 1.9900 1.8600 1.8800 24,600
Weekend
Weekend
1.9000 2.0000 1.7800 1.9400 72,000
2.0200 2.1400 1.6000 1.8400 186,800
2.0200 2.1800 1.9700 2.0300 104,700
2.3000 2.4500 2.0000 2.0200 215,000
2.0000 2.7000 1.9800 2.3600 904,100
Weekend
Weekend
1.6900 2.0000 1.6300 2.0000 208,500
1.6200 1.7000 1.6200 1.6400 112,100
1.6400 1.7100 1.6000 1.6500 65,900
1.6800 1.7400 1.6800 1.6900 27,000
1.6500 1.7500 1.6500 1.7300 34,200
Weekend
Weekend
1.7200 1.8000 1.6000 1.6400 34,800
1.8100 1.8100 1.6100 1.6200 112,600
1.7800 1.9500 1.7700 1.7800 47,400
1.8000 1.9800 1.8000 1.8100 120,700
1.7800 1.8600 1.7200 1.8200 77,400
Weekend
Weekend
1.8700 1.9400 1.7500 1.8200 103,200
1.8800 1.9200 1.8100 1.8900 56,300
1.8200 1.8800 1.6300 1.8800 64,200
1.5600 1.7900 1.4700 1.7900 115,500
1.4500 1.5700 1.4000 1.5400 68,400
Weekend
Weekend
1.4400 1.5500 1.4300 1.4400 47,100
1.6000 1.6000 1.4400 1.4500 63,500
1.6100 1.6100 1.5200 1.5700 16,700
1.5300 1.6500 1.5200 1.5900 86,400
1.5700 1.6100 1.5000 1.5100 35,200
Weekend
Weekend
1.6000 1.6600 1.4800 1.5400 24,800
1.6800 1.6800 1.5000 1.5600 75,100
1.4500 1.7300 1.4200 1.6900 156,700
1.4400 1.4400 1.3800 1.4200 27,700
1.4400 1.4500 1.3700 1.4100 29,100
Weekend
Weekend
1.4000 1.4300 1.3500 1.4300 58,200
1.3800 1.4500 1.3700 1.4000 18,900
1.3500 1.4200 1.3500 1.3800 11,200
1.2100 1.3500 1.2100 1.3500 25,300
1.2600 1.2700 1.2100 1.2600 43,100
2 · 8-K Pre-market · 04:35 ET 8-K ↗
Weekend
Weekend
1.2800 1.2900 1.2200 1.2500 49,800
1.2900 1.3300 1.2700 1.2700 10,200
1.2800 1.3200 1.2800 1.2900 10,700
1.3100 1.3100 1.2400 1.2500 41,300
1.3000 1.3300 1.2900 1.3000 4,900
Weekend
Weekend
1.3000 1.3200 1.2500 1.2900 34,000
1.3300 1.3600 1.3000 1.3000 25,400
1.3200 1.3400 1.3000 1.3200 5,400
1.3600 1.3600 1.3100 1.3400 15,900
No trading
Weekend
Weekend
1.3900 1.4500 1.3500 1.3500 52,200
1.4200 1.4700 1.4200 1.4700 13,000
1.4100 1.4200 1.4000 1.4000 10,700
1.4200 1.4400 1.3800 1.4000 15,500
1.3700 1.4100 1.3700 1.3800 27,300
Weekend
Weekend
1.4300 1.4500 1.3800 1.4000 15,300
1.3900 1.4400 1.3700 1.3700 22,400
1.4300 1.4400 1.3700 1.3900 22,000
1.4700 1.4900 1.3800 1.4300 84,000
1.4700 1.4900 1.4700 1.4700 35,500
Weekend
Weekend
1.5600 1.5600 1.4700 1.4700 28,400
1.5300 1.5300 1.5000 1.5200 9,100
1.5000 1.5700 1.5000 1.5100 17,800
1.5000 1.5700 1.5000 1.5000 20,000
1.5100 1.5400 1.5000 1.5000 18,800
Weekend
Weekend
1.5000 1.6200 1.4900 1.5300 49,900
1 · 10-Q After market open · 12:01 ET 10-Q ↗
1.5400 1.6100 1.5200 1.5700 51,700
1.5200 1.6300 1.5200 1.5300 28,800
1.5300 1.6500 1.5300 1.5700 10,300
1.5800 1.7000 1.5200 1.5800 63,900
Weekend
Weekend
1.6100 1.6500 1.5300 1.6000 34,500
1.6400 1.7100 1.5800 1.5800 94,900
1.6000 1.6600 1.6000 1.6500 8,900
1.6900 1.6900 1.6200 1.6200 52,700
1.8500 1.9300 1.7100 1.7100 17,500
Weekend
Weekend

Announcement Events

Each title opens the filing on the SEC website. Registered users can summarise the filing and up to seven relevant exhibits linked within the same SEC submission.

10 8-K 8-K (opens SEC filing in a new tab) Pre-market · 02:02 ET Summarise
9 8-K 8-K (opens SEC filing in a new tab) After market open · 13:00 ET Summarise
8 10-Q 10-Q (opens SEC filing in a new tab) Next filing day · accepted 07 May, 14:19 ET Summarise
7 DEF 14A DEF 14A (opens SEC filing in a new tab) After market open · 12:01 ET Summarise
6 10-K/A 10-K/A (opens SEC filing in a new tab) After market open · 12:01 ET Summarise
5 10-K 10-K (opens SEC filing in a new tab) After market open · 11:01 ET Summarise
4 8-K 8-K (opens SEC filing in a new tab) After market open · 12:30 ET Summarise
3 10-Q 10-Q (opens SEC filing in a new tab) After market open · 11:02 ET Summarise
2 8-K 8-K (opens SEC filing in a new tab) Pre-market · 04:35 ET Summarise
1 10-Q 10-Q (opens SEC filing in a new tab) After market open · 12:01 ET Summarise