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 — 1991

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1991-12-31$3.33$3.3318,750
1991-12-30$3.33$3.3326,438
1991-12-27$3.27$3.2727,750
1991-12-26$3.27$3.2747,625
1991-12-24$3.40$3.4021,938
1991-12-23$3.47$3.4776,125
1991-12-20$3.53$3.5362,250
1991-12-19$3.33$3.33115,313
1991-12-18$3.47$3.47391,500
1991-12-17$3.93$3.9350,063
1991-12-16$4.07$4.0787,188
1991-12-13$4.13$4.1344,813
1991-12-12$4.13$4.1348,188
1991-12-11$4.13$4.1362,250
1991-12-10$3.93$3.9360,750
1991-12-09$4.27$4.2740,875
1991-12-06$4.27$4.2774,438
1991-12-05$4.53$4.5320,063
1991-12-04$4.73$4.7370,313
1991-12-03$4.60$4.6092,250
1991-12-02$4.40$4.4062,813
1991-11-29$4.27$4.2780,063
1991-11-27$4.07$4.0767,313
1991-11-26$4.13$4.1334,500
1991-11-25$4.47$4.4772,750
1991-11-22$4.53$4.5345,000
1991-11-21$4.40$4.4046,688
1991-11-20$4.53$4.5312,750
1991-11-19$4.47$4.4714,625
1991-11-18$4.53$4.5353,250
1991-11-15$4.73$4.7375,750
1991-11-14$5.33$5.33116,625
1991-11-13$5.80$5.80107,813
1991-11-12$5.20$5.2047,250
1991-11-11$4.53$4.5330,563
1991-11-08$4.40$4.4047,250
1991-11-07$4.07$4.0718,375
1991-11-06$4.13$4.1315,563
1991-11-05$4.13$4.135,250
1991-11-04$4.13$4.139,563
1991-11-01$4.33$4.3397,500
1991-10-31$4.20$4.2064,313
1991-10-30$3.73$3.7359,625
1991-10-29$3.60$3.6047,250
1991-10-28$3.60$3.6075,375
1991-10-25$3.93$3.9341,625
1991-10-24$4.13$4.1318,938
1991-10-23$4.40$4.4032,063
1991-10-22$4.47$4.4715,188
1991-10-21$4.47$4.4721,188
1991-10-18$4.80$4.8018,000
1991-10-17$4.80$4.8028,125
1991-10-16$4.73$4.7321,938
1991-10-15$5.00$5.0037,688
1991-10-14$5.13$5.1351,375
1991-10-11$4.73$4.7365,063
1991-10-10$4.53$4.5394,313
1991-10-09$4.53$4.5347,438
1991-10-08$4.60$4.6023,438
1991-10-07$4.60$4.606,188
1991-10-04$4.60$4.6016,688
1991-10-03$4.53$4.5323,625
1991-10-02$4.53$4.5346,688
1991-10-01$4.87$4.8739,750
1991-09-30$5.07$5.0777,063
1991-09-27$5.13$5.1327,188
1991-09-26$4.87$4.8746,875
1991-09-25$4.87$4.8737,875
1991-09-24$4.73$4.7331,125
1991-09-23$4.80$4.8034,500
1991-09-20$4.93$4.9319,125
1991-09-19$4.87$4.8715,563
1991-09-18$4.80$4.8020,063
1991-09-17$4.80$4.800
1991-09-16$4.80$4.8041,625
1991-09-13$4.93$4.9322,875
1991-09-12$5.13$5.1332,438
1991-09-11$5.13$5.1338,625
1991-09-10$4.93$4.9357,375
1991-09-09$5.07$5.0740,313
1991-09-06$5.60$5.6077,250
1991-09-05$5.33$5.3360,000
1991-09-04$5.67$5.67110,438
1991-09-03$6.00$6.0074,438
1991-08-30$6.27$6.2790,188
1991-08-29$6.93$6.93145,125
1991-08-28$6.07$6.07139,875
1991-08-27$5.67$5.6795,250
1991-08-26$5.27$5.2772,188
1991-08-23$4.87$4.8738,625
1991-08-22$4.80$4.80100,313
1991-08-21$4.80$4.8067,500
1991-08-20$4.80$4.8076,125
1991-08-19$4.73$4.7397,500
1991-08-16$4.73$4.7369,375
1991-08-15$4.47$4.4747,063
1991-08-14$4.27$4.2745,563
1991-08-13$4.20$4.2090,188
1991-08-12$4.00$4.00113,625
1991-08-09$3.53$3.5353,625
1991-08-08$3.87$3.8722,875
1991-08-07$4.00$4.0024,563
1991-08-06$4.00$4.0044,438
1991-08-05$4.13$4.1328,875
1991-08-02$4.07$4.0763,000
1991-08-01$4.27$4.2792,438
1991-07-31$3.73$3.7365,625
1991-07-30$3.33$3.3315,188
1991-07-29$3.33$3.3337,688
1991-07-26$3.53$3.5334,688
1991-07-25$3.67$3.6755,500
1991-07-24$3.27$3.2720,438
1991-07-23$3.20$3.2033,938
1991-07-22$3.20$3.2058,125
1991-07-19$3.47$3.4725,500
1991-07-18$3.60$3.6046,688
1991-07-17$3.73$3.7378,188
1991-07-16$3.87$3.8758,500
1991-07-15$3.73$3.7371,813
1991-07-12$3.33$3.3373,125
1991-07-11$3.80$3.80108,563
1991-07-10$3.47$3.4780,438
1991-07-09$3.13$3.1387,938
1991-07-08$3.00$3.00104,813
1991-07-05$2.80$2.8068,438
1991-07-03$2.27$2.2742,750
1991-07-02$2.00$2.0015,000
1991-07-01$2.07$2.0724,938
1991-06-28$2.00$2.0018,000
1991-06-27$1.93$1.9311,063
1991-06-26$1.93$1.9316,125
1991-06-25$1.93$1.9330,000
1991-06-24$2.00$2.0021,563
1991-06-21$2.13$2.1312,563
1991-06-20$2.20$2.2014,250
1991-06-19$2.20$2.2017,438
1991-06-18$2.20$2.2016,688
1991-06-17$2.20$2.2019,688
1991-06-14$2.27$2.2729,813
1991-06-13$2.13$2.1336,000
1991-06-12$1.87$1.874,313
1991-06-11$1.87$1.8725,688
1991-06-10$1.87$1.8721,000
1991-06-07$1.87$1.8733,563
1991-06-06$1.93$1.934,313
1991-06-05$1.93$1.9315,375
1991-06-04$1.93$1.9333,188
1991-06-03$1.73$1.7327,000
1991-05-31$1.60$1.6036,375
1991-05-30$1.87$1.8725,875
1991-05-29$2.07$2.0713,688
1991-05-28$2.13$2.1311,813
1991-05-24$2.20$2.2018,375
1991-05-23$2.27$2.2710,688
1991-05-22$2.33$2.3318,750
1991-05-21$2.33$2.3363,750
1991-05-20$2.33$2.3343,500
1991-05-17$2.20$2.2025,313
1991-05-16$2.20$2.2010,125
1991-05-15$2.20$2.204,500
1991-05-14$2.20$2.2013,688
1991-05-13$2.27$2.2712,000
1991-05-10$2.20$2.2027,000
1991-05-09$2.20$2.2038,438
1991-05-08$2.20$2.2014,250
1991-05-07$2.20$2.2041,813
1991-05-06$2.13$2.1371,250
1991-05-03$2.13$2.1320,250
1991-05-02$2.13$2.1312,375
1991-05-01$2.20$2.2012,188
1991-04-30$2.20$2.208,250
1991-04-29$2.20$2.2025,875
1991-04-26$2.20$2.2026,813
1991-04-25$2.20$2.2045,375
1991-04-24$2.13$2.13117,375
1991-04-23$2.00$2.0046,688
1991-04-22$2.00$2.0060,750
1991-04-19$2.07$2.0733,188
1991-04-18$2.07$2.0726,063
1991-04-17$2.07$2.0754,375
1991-04-16$2.00$2.0011,813
1991-04-15$1.93$1.9326,813
1991-04-12$2.00$2.0065,250
1991-04-11$1.87$1.871,313
1991-04-10$1.87$1.876,188
1991-04-09$1.87$1.8735,625
1991-04-08$1.80$1.8011,063
1991-04-05$2.00$2.0032,250
1991-04-04$2.00$2.00118,125
1991-04-03$1.87$1.87140,438
1991-04-02$1.07$1.0723,438
1991-04-01$1.07$1.0721,750
1991-03-28$1.07$1.0716,875
1991-03-27$1.07$1.0712,938
1991-03-26$1.07$1.0735,813
1991-03-25$1.07$1.0711,625
1991-03-22$1.07$1.0768,063
1991-03-21$1.13$1.1322,688
1991-03-20$1.13$1.13375
1991-03-19$1.13$1.131,125
1991-03-18$1.13$1.1320,813
1991-03-15$1.20$1.2027,188
1991-03-14$1.27$1.273,563
1991-03-13$1.27$1.277,875
1991-03-12$1.27$1.276,000
1991-03-11$1.27$1.274,688
1991-03-08$1.27$1.272,813
1991-03-07$1.27$1.277,688
1991-03-06$1.27$1.2754,938
1991-03-05$1.27$1.275,250
1991-03-04$1.27$1.2731,500
1991-03-01$1.27$1.277,125
1991-02-28$1.27$1.2733,938
1991-02-27$1.20$1.2046,875
1991-02-26$1.13$1.1326,438
1991-02-25$1.07$1.0733,750
1991-02-22$1.00$1.0023,625
1991-02-21$1.00$1.009,188
1991-02-20$1.00$1.004,688
1991-02-19$1.00$1.005,625
1991-02-15$1.00$1.002,813
1991-02-14$1.00$1.002,250
1991-02-13$1.00$1.004,500
1991-02-12$1.00$1.001,125
1991-02-11$1.00$1.0010,125
1991-02-08$1.00$1.001,875
1991-02-07$1.00$1.001,313
1991-02-06$1.00$1.000
1991-02-05$1.00$1.004,688
1991-02-04$1.00$1.002,250
1991-02-01$1.00$1.001,125
1991-01-31$1.00$1.0010,500
1991-01-30$1.00$1.001,313
1991-01-29$1.00$1.0014,813
1991-01-28$1.00$1.004,313
1991-01-25$1.00$1.003,750
1991-01-24$1.00$1.003,000
1991-01-23$1.00$1.005,063
1991-01-22$1.00$1.000
1991-01-21$1.00$1.002,250
1991-01-18$1.00$1.00188
1991-01-17$1.00$1.001,500
1991-01-16$1.00$1.006,938
1991-01-15$1.00$1.00938
1991-01-14$1.00$1.0020,625
1991-01-11$1.07$1.075,813
1991-01-10$1.13$1.1311,625
1991-01-09$1.13$1.13938
1991-01-08$1.13$1.132,063
1991-01-07$1.13$1.133,375
1991-01-04$1.13$1.134,500
1991-01-03$1.07$1.078,250
1991-01-02$1.07$1.07938