Research Frontiers Incorporated (REFR)

Research Frontiers Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Oct 14, 2026	0.59	0.64	0.59	0.63	0.63	6.42%	126,220
Oct 13, 2026	0.59	0.64	0.56	0.59	0.59	3.93%	136,298
Oct 12, 2026	0.58	0.59	0.54	0.57	0.57	-4.01%	138,893
Oct 9, 2026	0.61	0.62	0.56	0.59	0.59	-4.68%	162,524
Oct 8, 2026	0.68	0.68	0.59	0.62	0.62	-8.95%	99,138
Oct 7, 2026	0.68	0.70	0.68	0.68	0.68	-4.59%	100,352
Oct 6, 2026	0.77	0.77	0.70	0.72	0.72	-1.61%	314,577
Oct 5, 2026	0.73	0.75	0.67	0.73	0.73	-0.05%	195,074
Oct 2, 2026	0.69	0.73	0.68	0.73	0.73	4.85%	82,422
Oct 1, 2026	0.71	0.73	0.66	0.69	0.69	-5.42%	158,745
Sep 30, 2026	0.69	0.73	0.67	0.73	0.73	5.15%	116,960
Sep 29, 2026	0.74	0.77	0.67	0.70	0.70	-9.78%	202,312
Sep 28, 2026	0.79	0.79	0.71	0.77	0.77	-2.15%	132,504
Sep 25, 2026	0.71	0.85	0.68	0.79	0.79	6.84%	382,911
Sep 24, 2026	0.71	0.81	0.65	0.74	0.74	3.77%	613,515
Sep 23, 2026	0.76	0.76	0.66	0.71	0.71	-8.42%	229,197
Sep 22, 2026	0.74	0.81	0.61	0.78	0.78	2.69%	890,405
Sep 21, 2026	0.48	0.78	0.46	0.76	0.76	16.54%	5,530,055
Sep 18, 2026	0.39	0.94	0.36	0.65	0.65	68.49%	92,095,952
Sep 17, 2026	0.39	0.41	0.37	0.39	0.39	1.24%	48,935
Sep 16, 2026	0.37	0.41	0.34	0.38	0.38	6.00%	202,857
Sep 15, 2026	0.37	0.39	0.35	0.36	0.36	-5.46%	105,974
Sep 14, 2026	0.38	0.42	0.37	0.38	0.38	-2.06%	98,725
Sep 11, 2026	0.38	0.42	0.37	0.39	0.39	1.04%	52,380
Sep 10, 2026	0.40	0.40	0.39	0.39	0.39	-1.86%	95,593
Sep 9, 2026	0.39	0.40	0.38	0.39	0.39	-0.56%	61,150
Sep 8, 2026	0.41	0.42	0.37	0.39	0.39	-4.87%	242,824
Sep 4, 2026	0.41	0.43	0.40	0.41	0.41	1.12%	142,731
Sep 3, 2026	0.40	0.43	0.40	0.41	0.41	1.96%	63,031
Sep 2, 2026	0.45	0.46	0.40	0.40	0.40	-9.41%	102,573
Sep 1, 2026	0.47	0.47	0.43	0.44	0.44	-4.95%	408,753
Aug 31, 2026	0.47	0.47	0.45	0.47	0.47	1.08%	61,662
Aug 28, 2026	0.49	0.49	0.45	0.46	0.46	-4.72%	174,514
Aug 27, 2026	0.51	0.53	0.47	0.49	0.49	1.04%	352,178
Aug 26, 2026	0.48	0.50	0.46	0.48	0.48	0.44%	363,942
Aug 25, 2026	0.49	0.51	0.46	0.48	0.48	2.33%	182,107
Aug 24, 2026	0.44	0.49	0.43	0.47	0.47	4.92%	94,772
Aug 21, 2026	0.46	0.47	0.43	0.45	0.45	-1.09%	66,667
Aug 20, 2026	0.46	0.49	0.44	0.45	0.45	2.23%	128,860
Aug 19, 2026	0.42	0.46	0.40	0.44	0.44	4.81%	223,134
Aug 18, 2026	0.44	0.47	0.42	0.42	0.42	-2.44%	35,377
Aug 17, 2026	0.43	0.48	0.42	0.43	0.43	-2.16%	64,771
Aug 14, 2026	0.45	0.45	0.43	0.44	0.44	1.20%	11,570
Aug 13, 2026	0.48	0.48	0.43	0.43	0.43	-9.68%	78,469
Aug 12, 2026	0.49	0.49	0.47	0.48	0.48	-2.37%	50,862
Aug 11, 2026	0.50	0.51	0.49	0.49	0.49	0.63%	40,198
Aug 10, 2026	0.49	0.50	0.47	0.49	0.49	0.72%	161,757
Aug 7, 2026	0.50	0.50	0.45	0.49	0.49	4.06%	94,171
Aug 6, 2026	0.46	0.50	0.45	0.47	0.47	-1.37%	230,082
Aug 5, 2026	0.47	0.49	0.45	0.47	0.47	1.28%	18,778

Data Source: S&P Global Market Intelligence Last updated: Oct 14, 2026

Historical price data is provided by S&P Global Market Intelligence. New prices are added after the close of each trading day, and past prices are adjusted for stock splits.

Update frequency:

Daily

Last checked:

Oct 14, 2026

Data Sources Report a data error

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