NASDAQ:REGN | Historical Stock Price | REGENERON PHARMACEUTICALS, 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
1991-04-02 to 2026-09-04
Data captured

Stock Price Chart

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

$3.27$10.74$35.35$116.32$382.72$1,259.251991-04-022026-08-27

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

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Historical Stock Price — 2005

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2005-12-30$15.90$15.90623,800
2005-12-29$16.41$16.41557,900
2005-12-28$16.83$16.831,661,000
2005-12-27$16.59$16.592,246,300
2005-12-23$13.76$13.76673,300
2005-12-22$12.86$12.86499,800
2005-12-21$12.10$12.10254,900
2005-12-20$11.62$11.62232,700
2005-12-19$11.44$11.44235,100
2005-12-16$11.96$11.96473,600
2005-12-15$12.00$12.00366,100
2005-12-14$11.65$11.65180,600
2005-12-13$11.65$11.65198,000
2005-12-12$11.56$11.56594,300
2005-12-09$11.49$11.49506,100
2005-12-08$10.70$10.70405,800
2005-12-07$10.44$10.44370,600
2005-12-06$10.58$10.58359,900
2005-12-05$10.46$10.46618,500
2005-12-02$10.80$10.80250,000
2005-12-01$10.91$10.91286,600
2005-11-30$11.17$11.17970,700
2005-11-29$10.58$10.58229,500
2005-11-28$10.74$10.74398,000
2005-11-25$11.31$11.3175,500
2005-11-23$11.36$11.36197,100
2005-11-22$11.41$11.41374,600
2005-11-21$11.27$11.27265,700
2005-11-18$11.23$11.23405,400
2005-11-17$11.28$11.28153,000
2005-11-16$11.14$11.14618,300
2005-11-15$11.14$11.14908,500
2005-11-14$10.89$10.89425,200
2005-11-11$11.03$11.03285,700
2005-11-10$11.21$11.21682,000
2005-11-09$11.47$11.471,626,300
2005-11-08$12.72$12.72218,200
2005-11-07$13.09$13.09194,100
2005-11-04$13.00$13.00259,700
2005-11-03$12.98$12.98524,900
2005-11-02$12.11$12.11418,900
2005-11-01$12.01$12.01410,500
2005-10-31$12.51$12.51554,500
2005-10-28$11.97$11.97532,600
2005-10-27$11.40$11.40427,000
2005-10-26$10.94$10.94461,900
2005-10-25$11.01$11.01963,500
2005-10-24$11.21$11.211,381,400
2005-10-21$9.00$9.00421,200
2005-10-20$9.13$9.13158,600
2005-10-19$9.30$9.30401,800
2005-10-18$9.43$9.43241,500
2005-10-17$9.31$9.31307,000
2005-10-14$9.23$9.23220,900
2005-10-13$8.92$8.92466,600
2005-10-12$8.76$8.761,263,800
2005-10-11$9.40$9.40456,200
2005-10-10$9.39$9.39183,400
2005-10-07$9.50$9.50460,200
2005-10-06$9.25$9.251,054,600
2005-10-05$9.83$9.83544,300
2005-10-04$10.10$10.10571,300
2005-10-03$9.70$9.70474,300
2005-09-30$9.49$9.49252,000
2005-09-29$9.53$9.53203,500
2005-09-28$9.42$9.42414,700
2005-09-27$9.37$9.371,103,600
2005-09-26$8.50$8.50270,900
2005-09-23$8.26$8.26152,500
2005-09-22$8.24$8.24229,700
2005-09-21$8.28$8.28181,500
2005-09-20$8.67$8.67277,300
2005-09-19$8.44$8.44188,600
2005-09-16$8.35$8.35778,100
2005-09-15$7.77$7.77307,600
2005-09-14$8.01$8.01340,700
2005-09-13$8.36$8.36219,100
2005-09-12$8.55$8.55175,200
2005-09-09$8.41$8.41214,400
2005-09-08$8.49$8.49204,500
2005-09-07$8.39$8.39431,200
2005-09-06$8.05$8.05422,900
2005-09-02$7.78$7.78254,800
2005-09-01$7.64$7.64187,400
2005-08-31$7.47$7.47197,700
2005-08-30$7.61$7.61211,400
2005-08-29$7.83$7.83303,900
2005-08-26$7.49$7.49313,300
2005-08-25$7.98$7.98244,200
2005-08-24$8.18$8.18202,300
2005-08-23$8.30$8.30276,000
2005-08-22$8.62$8.62131,300
2005-08-19$8.45$8.4579,700
2005-08-18$8.40$8.40151,500
2005-08-17$8.47$8.47166,300
2005-08-16$8.62$8.62208,700
2005-08-15$8.89$8.89336,800
2005-08-12$8.41$8.41299,600
2005-08-11$8.82$8.82149,900
2005-08-10$8.91$8.91272,400
2005-08-09$8.68$8.68237,300
2005-08-08$8.57$8.57756,100
2005-08-05$9.41$9.41320,900
2005-08-04$9.75$9.75225,400
2005-08-03$9.95$9.95183,800
2005-08-02$10.17$10.17606,200
2005-08-01$9.86$9.86181,100
2005-07-29$9.64$9.64129,600
2005-07-28$9.75$9.75131,600
2005-07-27$9.55$9.55204,200
2005-07-26$9.77$9.77137,900
2005-07-25$9.52$9.52306,900
2005-07-22$9.93$9.93577,000
2005-07-21$10.27$10.27340,200
2005-07-20$10.22$10.22422,700
2005-07-19$9.49$9.49193,600
2005-07-18$9.40$9.40161,900
2005-07-15$9.51$9.51357,700
2005-07-14$9.52$9.52228,900
2005-07-13$9.30$9.30226,300
2005-07-12$9.26$9.26311,300
2005-07-11$9.63$9.63380,500
2005-07-08$9.50$9.50281,400
2005-07-07$8.98$8.98204,700
2005-07-06$9.11$9.11286,300
2005-07-05$9.04$9.04506,300
2005-07-01$8.62$8.62315,700
2005-06-30$8.39$8.39242,000
2005-06-29$8.64$8.64201,800
2005-06-28$8.75$8.75540,600
2005-06-27$8.24$8.24360,300
2005-06-24$8.80$8.80862,800
2005-06-23$8.44$8.44267,800
2005-06-22$8.61$8.61317,100
2005-06-21$8.68$8.68815,400
2005-06-20$8.64$8.64830,300
2005-06-17$7.65$7.65981,400
2005-06-16$7.29$7.29413,300
2005-06-15$6.93$6.93262,800
2005-06-14$6.60$6.60260,500
2005-06-13$6.22$6.22160,300
2005-06-10$6.36$6.36130,000
2005-06-09$6.20$6.20250,200
2005-06-08$6.15$6.15237,700
2005-06-07$6.25$6.25241,400
2005-06-06$6.24$6.24219,900
2005-06-03$6.16$6.16255,600
2005-06-02$6.40$6.40231,200
2005-06-01$6.41$6.41340,300
2005-05-31$6.23$6.23234,200
2005-05-27$6.63$6.63212,500
2005-05-26$6.42$6.42171,900
2005-05-25$6.40$6.40232,800
2005-05-24$6.63$6.63477,100
2005-05-23$6.51$6.51523,100
2005-05-20$6.22$6.22270,600
2005-05-19$6.32$6.32337,500
2005-05-18$6.50$6.50535,400
2005-05-17$6.57$6.57520,100
2005-05-16$6.02$6.02325,500
2005-05-13$6.04$6.04367,800
2005-05-12$6.28$6.28514,000
2005-05-11$6.72$6.72424,200
2005-05-10$6.84$6.84489,600
2005-05-09$6.89$6.89455,600
2005-05-06$6.90$6.90951,800
2005-05-05$7.28$7.28798,400
2005-05-04$6.64$6.64786,300
2005-05-03$6.16$6.16968,800
2005-05-02$6.06$6.06456,400
2005-04-29$5.57$5.57291,900
2005-04-28$5.38$5.38384,900
2005-04-27$5.75$5.75446,800
2005-04-26$5.70$5.70508,400
2005-04-25$5.25$5.25294,600
2005-04-22$5.02$5.02390,000
2005-04-21$5.21$5.21488,900
2005-04-20$4.84$4.84269,800
2005-04-19$4.80$4.80199,600
2005-04-18$4.73$4.73590,600
2005-04-15$4.74$4.74524,900
2005-04-14$4.63$4.63612,200
2005-04-13$4.80$4.80732,700
2005-04-12$4.73$4.73795,100
2005-04-11$4.92$4.92737,900
2005-04-08$4.77$4.77150,000
2005-04-07$4.87$4.87487,900
2005-04-06$4.68$4.68427,700
2005-04-05$4.65$4.65281,000
2005-04-04$4.88$4.88249,200
2005-04-01$4.99$4.99202,000
2005-03-31$5.11$5.11230,600
2005-03-30$5.05$5.05174,500
2005-03-29$4.86$4.86388,100
2005-03-28$5.23$5.23278,900
2005-03-24$5.37$5.37433,500
2005-03-23$5.51$5.51113,700
2005-03-22$5.45$5.45206,000
2005-03-21$5.52$5.52171,600
2005-03-18$5.51$5.51708,200
2005-03-17$5.34$5.34266,700
2005-03-16$5.35$5.35352,200
2005-03-15$5.71$5.71545,400
2005-03-14$5.97$5.97673,200
2005-03-11$5.23$5.23265,800
2005-03-10$5.44$5.44394,900
2005-03-09$5.77$5.77407,500
2005-03-08$5.74$5.74259,700
2005-03-07$5.94$5.94300,300
2005-03-04$5.88$5.88441,500
2005-03-03$6.05$6.05242,600
2005-03-02$6.05$6.05329,400
2005-03-01$6.02$6.02352,100
2005-02-28$6.11$6.11339,600
2005-02-25$6.47$6.47147,600
2005-02-24$6.48$6.48215,900
2005-02-23$6.40$6.40217,600
2005-02-22$6.46$6.46567,300
2005-02-18$6.39$6.39738,400
2005-02-17$6.57$6.57198,300
2005-02-16$6.77$6.77166,400
2005-02-15$6.90$6.90243,200
2005-02-14$6.87$6.87322,100
2005-02-11$7.09$7.09635,200
2005-02-10$7.23$7.23324,700
2005-02-09$7.05$7.05363,000
2005-02-08$7.37$7.37164,300
2005-02-07$7.46$7.46379,600
2005-02-04$7.51$7.51417,800
2005-02-03$7.23$7.23401,600
2005-02-02$7.19$7.19224,100
2005-02-01$7.22$7.22271,800
2005-01-31$7.20$7.20145,900
2005-01-28$6.99$6.99219,100
2005-01-27$7.25$7.25204,600
2005-01-26$7.26$7.26282,100
2005-01-25$7.15$7.15235,800
2005-01-24$7.03$7.03398,200
2005-01-21$7.14$7.14310,400
2005-01-20$7.34$7.34218,200
2005-01-19$7.52$7.52376,200
2005-01-18$7.86$7.86287,100
2005-01-14$7.73$7.73389,900
2005-01-13$7.64$7.64283,100
2005-01-12$7.73$7.73370,900
2005-01-11$7.50$7.50802,300
2005-01-10$8.47$8.47294,700
2005-01-07$8.15$8.15166,900
2005-01-06$8.30$8.30222,500
2005-01-05$8.41$8.41293,300
2005-01-04$8.35$8.35403,400
2005-01-03$9.04$9.04235,900