NASDAQ:REFR | Historical Stock Price | RESEARCH FRONTIERS INC

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
1986-07-08 to 2026-09-03
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$0.47$1.11$2.63$6.25$14.85$35.311986-07-082026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

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Historical Stock Price — 2017

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2017-12-29$1.04$1.0473,200
2017-12-28$1.02$1.02125,500
2017-12-27$1.09$1.09115,600
2017-12-26$1.08$1.08132,000
2017-12-22$1.07$1.0786,900
2017-12-21$1.04$1.0472,600
2017-12-20$1.01$1.0141,300
2017-12-19$1.01$1.0182,200
2017-12-18$1.02$1.02269,200
2017-12-15$0.98$0.98186,100
2017-12-14$0.93$0.93137,400
2017-12-13$0.91$0.9193,400
2017-12-12$0.91$0.91131,900
2017-12-11$0.93$0.9342,400
2017-12-08$0.94$0.9449,500
2017-12-07$0.99$0.99450,700
2017-12-06$0.92$0.9289,100
2017-12-05$0.94$0.9491,700
2017-12-04$0.97$0.97157,100
2017-12-01$1.05$1.05114,300
2017-11-30$1.04$1.0476,100
2017-11-29$1.03$1.0319,600
2017-11-28$1.05$1.0529,900
2017-11-27$1.05$1.0531,000
2017-11-24$1.07$1.0767,800
2017-11-22$1.03$1.0342,300
2017-11-21$1.03$1.0341,000
2017-11-20$1.05$1.0527,900
2017-11-17$1.08$1.0839,000
2017-11-16$1.08$1.0873,600
2017-11-15$1.05$1.0555,500
2017-11-14$1.05$1.0515,400
2017-11-13$1.11$1.1141,200
2017-11-10$1.07$1.0752,500
2017-11-09$1.08$1.0815,300
2017-11-08$1.12$1.1219,600
2017-11-07$1.16$1.1623,000
2017-11-06$1.18$1.1840,500
2017-11-03$1.16$1.1698,600
2017-11-02$1.10$1.1036,300
2017-11-01$1.12$1.1230,600
2017-10-31$1.11$1.1129,700
2017-10-30$1.10$1.1084,400
2017-10-27$1.09$1.0993,800
2017-10-26$1.14$1.1422,100
2017-10-25$1.14$1.1428,700
2017-10-24$1.15$1.1519,300
2017-10-23$1.15$1.1526,900
2017-10-20$1.18$1.1878,900
2017-10-19$1.15$1.1584,400
2017-10-18$1.23$1.2381,600
2017-10-17$1.21$1.21101,600
2017-10-16$1.27$1.2785,000
2017-10-13$1.34$1.3460,700
2017-10-12$1.36$1.36218,800
2017-10-11$1.19$1.19111,000
2017-10-10$1.16$1.1640,700
2017-10-09$1.17$1.1724,900
2017-10-06$1.17$1.1718,700
2017-10-05$1.14$1.1450,000
2017-10-04$1.16$1.1622,900
2017-10-03$1.16$1.1620,100
2017-10-02$1.19$1.1918,300
2017-09-29$1.19$1.1923,300
2017-09-28$1.18$1.189,000
2017-09-27$1.19$1.1915,200
2017-09-26$1.17$1.174,100
2017-09-25$1.18$1.1864,800
2017-09-22$1.19$1.1935,700
2017-09-21$1.18$1.187,800
2017-09-20$1.19$1.1930,700
2017-09-19$1.22$1.2245,100
2017-09-18$1.21$1.2138,400
2017-09-15$1.25$1.2550,100
2017-09-14$1.16$1.1620,600
2017-09-13$1.16$1.1640,400
2017-09-12$1.17$1.1758,200
2017-09-11$1.20$1.2015,600
2017-09-08$1.20$1.2011,200
2017-09-07$1.20$1.2032,900
2017-09-06$1.19$1.1954,100
2017-09-05$1.19$1.1949,400
2017-09-01$1.25$1.2561,500
2017-08-31$1.18$1.1816,800
2017-08-30$1.28$1.286,600
2017-08-29$1.21$1.215,900
2017-08-28$1.25$1.2543,400
2017-08-25$1.27$1.27113,100
2017-08-24$1.17$1.17108,900
2017-08-23$1.16$1.1638,100
2017-08-22$1.17$1.1719,200
2017-08-21$1.14$1.14141,200
2017-08-18$1.10$1.1065,300
2017-08-17$1.10$1.108,800
2017-08-16$1.02$1.0242,600
2017-08-15$1.02$1.0233,600
2017-08-14$1.08$1.0851,200
2017-08-11$1.08$1.0837,700
2017-08-10$1.10$1.1029,200
2017-08-09$1.13$1.1339,400
2017-08-08$1.14$1.1423,400
2017-08-07$1.22$1.2275,000
2017-08-04$1.23$1.2369,300
2017-08-03$1.16$1.1655,500
2017-08-02$1.16$1.1674,800
2017-08-01$1.21$1.2110,600
2017-07-31$1.26$1.2624,600
2017-07-28$1.28$1.288,100
2017-07-27$1.29$1.298,900
2017-07-26$1.24$1.240
2017-07-25$1.24$1.2418,300
2017-07-24$1.23$1.238,600
2017-07-21$1.29$1.2943,000
2017-07-20$1.27$1.276,300
2017-07-19$1.26$1.2615,300
2017-07-18$1.26$1.2663,500
2017-07-17$1.26$1.2621,100
2017-07-14$1.31$1.3115,500
2017-07-13$1.31$1.3113,800
2017-07-12$1.21$1.21103,900
2017-07-11$1.20$1.2015,000
2017-07-10$1.23$1.2324,700
2017-07-07$1.25$1.253,300
2017-07-06$1.23$1.2315,600
2017-07-05$1.22$1.2224,400
2017-07-03$1.27$1.273,300
2017-06-30$1.29$1.2914,400
2017-06-29$1.28$1.2821,600
2017-06-28$1.25$1.2516,300
2017-06-27$1.27$1.2732,800
2017-06-26$1.28$1.2824,300
2017-06-23$1.30$1.3018,600
2017-06-22$1.32$1.3222,000
2017-06-21$1.31$1.3115,600
2017-06-20$1.34$1.3412,400
2017-06-19$1.33$1.3356,200
2017-06-16$1.36$1.3622,600
2017-06-15$1.33$1.3311,900
2017-06-14$1.33$1.3313,500
2017-06-13$1.36$1.3694,200
2017-06-12$1.29$1.29143,700
2017-06-09$1.42$1.42119,800
2017-06-08$1.20$1.2030,500
2017-06-07$1.20$1.2019,100
2017-06-06$1.19$1.1910,100
2017-06-05$1.16$1.1675,100
2017-06-02$1.08$1.088,900
2017-06-01$1.06$1.0619,000
2017-05-31$1.07$1.0721,200
2017-05-30$1.06$1.0650,000
2017-05-26$1.09$1.0958,500
2017-05-25$1.15$1.1542,500
2017-05-24$1.15$1.1522,600
2017-05-23$1.08$1.08122,500
2017-05-22$1.13$1.1361,300
2017-05-19$1.10$1.10161,800
2017-05-18$1.00$1.00270,800
2017-05-17$1.07$1.0749,300
2017-05-16$1.13$1.1367,000
2017-05-15$1.14$1.14132,400
2017-05-12$1.27$1.2714,800
2017-05-11$1.29$1.2930,200
2017-05-10$1.37$1.3737,900
2017-05-09$1.40$1.4033,800
2017-05-08$1.38$1.38106,200
2017-05-05$1.41$1.41245,600
2017-05-04$1.20$1.2080,400
2017-05-03$1.20$1.2026,000
2017-05-02$1.17$1.1756,900
2017-05-01$1.21$1.2165,400
2017-04-28$1.26$1.2651,600
2017-04-27$1.31$1.31304,900
2017-04-26$1.34$1.3497,500
2017-04-25$1.39$1.3914,400
2017-04-24$1.37$1.3718,200
2017-04-21$1.38$1.3823,600
2017-04-20$1.30$1.3061,600
2017-04-19$1.31$1.314,800
2017-04-18$1.30$1.3020,500
2017-04-17$1.29$1.2941,300
2017-04-13$1.38$1.3817,100
2017-04-12$1.37$1.3713,900
2017-04-11$1.38$1.3859,300
2017-04-10$1.23$1.2329,800
2017-04-07$1.27$1.2765,500
2017-04-06$1.31$1.314,100
2017-04-05$1.29$1.2922,600
2017-04-04$1.29$1.2942,900
2017-04-03$1.34$1.3426,100
2017-03-31$1.40$1.4016,700
2017-03-30$1.43$1.4352,600
2017-03-29$1.44$1.4419,800
2017-03-28$1.47$1.4747,200
2017-03-27$1.47$1.4712,100
2017-03-24$1.44$1.4421,900
2017-03-23$1.35$1.3519,900
2017-03-22$1.30$1.3063,100
2017-03-21$1.29$1.2984,800
2017-03-20$1.40$1.4065,400
2017-03-17$1.46$1.4635,000
2017-03-16$1.50$1.5012,800
2017-03-15$1.43$1.4337,100
2017-03-14$1.42$1.42106,700
2017-03-13$1.58$1.5869,700
2017-03-10$1.60$1.6042,200
2017-03-09$1.60$1.6060,100
2017-03-08$1.51$1.5167,700
2017-03-07$1.55$1.5567,700
2017-03-06$1.57$1.57133,200
2017-03-03$1.61$1.6132,000
2017-03-02$1.60$1.60122,200
2017-03-01$1.66$1.6669,500
2017-02-28$1.68$1.6830,000
2017-02-27$1.72$1.7214,100
2017-02-24$1.70$1.7020,500
2017-02-23$1.74$1.7443,600
2017-02-22$1.77$1.77143,500
2017-02-21$1.76$1.7670,500
2017-02-17$1.80$1.8032,100
2017-02-16$1.77$1.7729,500
2017-02-15$1.77$1.7749,800
2017-02-14$1.81$1.8148,000
2017-02-13$1.80$1.8040,200
2017-02-10$1.82$1.8256,100
2017-02-09$1.81$1.81115,100
2017-02-08$1.76$1.7624,400
2017-02-07$1.78$1.7843,100
2017-02-06$1.79$1.7922,800
2017-02-03$1.88$1.8822,600
2017-02-02$1.88$1.8814,700
2017-02-01$1.93$1.9316,500
2017-01-31$1.91$1.9130,500
2017-01-30$1.90$1.9011,100
2017-01-27$1.94$1.9437,700
2017-01-26$1.90$1.9017,000
2017-01-25$1.98$1.9870,300
2017-01-24$1.97$1.9724,400
2017-01-23$1.89$1.8922,800
2017-01-20$1.98$1.989,300
2017-01-19$2.00$2.0029,600
2017-01-18$1.99$1.9929,500
2017-01-17$1.96$1.9642,800
2017-01-13$2.04$2.0472,600
2017-01-12$1.99$1.9951,400
2017-01-11$2.09$2.09265,800
2017-01-10$1.94$1.9454,400
2017-01-09$1.76$1.7653,100
2017-01-06$1.85$1.859,800
2017-01-05$1.87$1.8721,900
2017-01-04$1.85$1.8529,700
2017-01-03$1.78$1.7848,900