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 — 2003

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2003-12-31$14.71$14.71333,600
2003-12-30$15.24$15.24635,800
2003-12-29$14.90$14.90308,200
2003-12-26$14.27$14.2795,100
2003-12-24$14.16$14.16265,500
2003-12-23$14.85$14.85418,800
2003-12-22$14.10$14.10551,000
2003-12-19$13.33$13.33417,800
2003-12-18$12.92$12.92276,000
2003-12-17$12.88$12.88114,500
2003-12-16$12.76$12.76238,600
2003-12-15$12.66$12.66365,500
2003-12-12$13.00$13.00151,700
2003-12-11$13.05$13.05265,800
2003-12-10$12.57$12.57288,500
2003-12-09$12.91$12.91225,800
2003-12-08$13.10$13.10353,700
2003-12-05$13.00$13.00174,000
2003-12-04$12.97$12.97250,200
2003-12-03$12.83$12.83352,100
2003-12-02$13.20$13.20673,900
2003-12-01$12.95$12.95341,700
2003-11-28$12.88$12.88108,100
2003-11-26$13.00$13.00123,500
2003-11-25$13.00$13.00422,200
2003-11-24$13.14$13.14318,000
2003-11-21$12.23$12.23248,300
2003-11-20$12.41$12.41323,200
2003-11-19$12.20$12.20455,500
2003-11-18$12.40$12.40479,900
2003-11-17$12.73$12.73471,300
2003-11-14$12.98$12.98206,400
2003-11-13$13.44$13.44225,400
2003-11-12$13.57$13.57415,300
2003-11-11$12.66$12.66417,500
2003-11-10$12.71$12.71341,900
2003-11-07$13.00$13.00387,800
2003-11-06$13.29$13.29323,400
2003-11-05$12.99$12.99447,500
2003-11-04$12.94$12.94612,900
2003-11-03$13.18$13.18478,800
2003-10-31$13.84$13.84376,400
2003-10-30$13.32$13.32531,600
2003-10-29$13.25$13.25281,100
2003-10-28$13.46$13.46517,500
2003-10-27$13.46$13.46607,500
2003-10-24$13.04$13.04374,600
2003-10-23$12.90$12.90390,800
2003-10-22$13.06$13.06487,100
2003-10-21$13.62$13.62768,400
2003-10-20$12.96$12.96604,900
2003-10-17$13.00$13.00500,700
2003-10-16$13.30$13.30401,300
2003-10-15$13.25$13.25241,600
2003-10-14$13.46$13.46568,000
2003-10-13$13.80$13.80566,200
2003-10-10$14.04$14.04370,700
2003-10-09$14.44$14.44636,800
2003-10-08$14.53$14.531,414,200
2003-10-07$14.59$14.597,728,000
2003-10-06$18.40$18.40274,000
2003-10-03$17.92$17.92294,300
2003-10-02$18.05$18.05384,200
2003-10-01$17.59$17.59684,400
2003-09-30$17.67$17.67650,700
2003-09-29$17.90$17.90769,200
2003-09-26$17.62$17.62687,300
2003-09-25$18.63$18.63546,900
2003-09-24$19.17$19.17640,500
2003-09-23$19.99$19.99359,100
2003-09-22$19.86$19.86417,000
2003-09-19$20.39$20.39350,900
2003-09-18$20.98$20.98679,700
2003-09-17$20.24$20.24943,700
2003-09-16$20.10$20.10654,800
2003-09-15$20.26$20.26378,300
2003-09-12$20.73$20.73482,700
2003-09-11$20.90$20.90975,700
2003-09-10$21.53$21.53692,200
2003-09-09$21.75$21.751,818,100
2003-09-08$22.31$22.316,101,800
2003-09-05$16.88$16.88727,500
2003-09-04$17.21$17.21746,700
2003-09-03$16.52$16.52838,400
2003-09-02$16.28$16.28588,400
2003-08-29$15.21$15.21151,000
2003-08-28$15.15$15.15413,000
2003-08-27$14.63$14.63283,800
2003-08-26$14.34$14.34351,800
2003-08-25$14.23$14.23300,100
2003-08-22$14.31$14.31613,400
2003-08-21$14.86$14.86197,400
2003-08-20$14.60$14.60239,600
2003-08-19$14.23$14.23322,800
2003-08-18$14.11$14.11448,000
2003-08-15$13.21$13.21135,600
2003-08-14$13.32$13.32300,400
2003-08-13$13.11$13.11391,200
2003-08-12$13.29$13.29665,900
2003-08-11$12.56$12.56572,300
2003-08-08$12.52$12.52374,500
2003-08-07$12.78$12.78361,400
2003-08-06$12.43$12.43408,600
2003-08-05$13.07$13.07311,800
2003-08-04$13.91$13.91744,100
2003-08-01$14.56$14.56302,500
2003-07-31$15.40$15.40259,300
2003-07-30$14.82$14.82165,600
2003-07-29$15.09$15.09215,300
2003-07-28$15.10$15.10440,300
2003-07-25$14.75$14.75207,700
2003-07-24$14.91$14.91341,200
2003-07-23$15.03$15.03166,100
2003-07-22$14.53$14.53374,400
2003-07-21$14.50$14.50504,300
2003-07-18$15.10$15.10350,900
2003-07-17$15.35$15.35409,200
2003-07-16$16.15$16.15321,200
2003-07-15$16.25$16.25213,500
2003-07-14$16.42$16.42316,400
2003-07-11$16.60$16.60242,100
2003-07-10$16.26$16.26197,500
2003-07-09$16.56$16.56602,300
2003-07-08$16.42$16.42516,300
2003-07-07$16.35$16.35388,400
2003-07-03$15.95$15.95244,500
2003-07-02$15.79$15.79623,100
2003-07-01$15.64$15.64582,000
2003-06-30$15.76$15.76602,000
2003-06-27$16.42$16.421,197,500
2003-06-26$15.70$15.70649,300
2003-06-25$15.94$15.94827,700
2003-06-24$16.21$16.21984,100
2003-06-23$15.21$15.211,019,700
2003-06-20$15.64$15.64980,700
2003-06-19$15.48$15.481,867,700
2003-06-18$16.97$16.971,259,500
2003-06-17$17.84$17.84579,800
2003-06-16$18.14$18.141,180,800
2003-06-13$17.79$17.791,064,300
2003-06-12$18.53$18.531,707,000
2003-06-11$17.60$17.602,035,600
2003-06-10$17.00$17.003,189,700
2003-06-09$15.96$15.962,721,500
2003-06-06$15.86$15.862,022,700
2003-06-05$15.52$15.521,695,300
2003-06-04$14.61$14.611,663,900
2003-06-03$13.75$13.752,482,500
2003-06-02$14.90$14.902,615,200
2003-05-30$13.74$13.741,242,200
2003-05-29$13.08$13.081,479,200
2003-05-28$13.38$13.382,215,600
2003-05-27$13.62$13.623,609,000
2003-05-23$11.22$11.221,339,600
2003-05-22$10.51$10.511,771,500
2003-05-21$10.21$10.211,491,900
2003-05-20$9.99$9.996,910,300
2003-05-19$9.99$9.997,222,100
2003-05-16$7.06$7.06627,300
2003-05-15$7.25$7.25954,000
2003-05-14$7.17$7.17779,900
2003-05-13$6.66$6.66549,700
2003-05-12$6.58$6.58456,500
2003-05-09$6.57$6.57587,400
2003-05-08$6.54$6.54336,400
2003-05-07$6.62$6.62673,100
2003-05-06$6.80$6.80999,600
2003-05-05$6.53$6.53536,800
2003-05-02$6.56$6.56720,600
2003-05-01$6.33$6.33364,900
2003-04-30$6.33$6.33421,400
2003-04-29$6.33$6.33608,300
2003-04-28$6.32$6.32489,900
2003-04-25$6.44$6.44783,600
2003-04-24$6.61$6.611,217,400
2003-04-23$6.22$6.22745,100
2003-04-22$5.88$5.881,086,300
2003-04-21$6.01$6.01881,700
2003-04-17$6.04$6.04586,900
2003-04-16$6.12$6.12502,900
2003-04-15$6.34$6.34567,500
2003-04-14$6.37$6.371,262,400
2003-04-11$6.15$6.15728,800
2003-04-10$6.40$6.40528,400
2003-04-09$6.46$6.46727,600
2003-04-08$6.64$6.641,217,500
2003-04-07$6.46$6.461,422,700
2003-04-04$6.71$6.711,152,800
2003-04-03$6.80$6.802,467,400
2003-04-02$6.60$6.603,973,200
2003-04-01$6.89$6.896,709,700
2003-03-31$7.52$7.5228,330,500
2003-03-28$17.31$17.314,518,900
2003-03-27$19.35$19.35678,600
2003-03-26$19.86$19.86614,300
2003-03-25$19.71$19.71567,600
2003-03-24$19.29$19.29891,100
2003-03-21$20.46$20.46657,000
2003-03-20$20.20$20.20391,600
2003-03-19$20.66$20.66459,000
2003-03-18$20.69$20.69864,000
2003-03-17$20.38$20.38696,200
2003-03-14$19.83$19.83841,200
2003-03-13$19.81$19.81733,400
2003-03-12$18.81$18.81640,600
2003-03-11$18.30$18.30956,000
2003-03-10$18.97$18.971,712,900
2003-03-07$17.75$17.75529,800
2003-03-06$17.31$17.31604,000
2003-03-05$18.10$18.10224,800
2003-03-04$18.36$18.36397,900
2003-03-03$17.75$17.75434,400
2003-02-28$18.34$18.34455,800
2003-02-27$18.50$18.50531,800
2003-02-26$18.15$18.15593,500
2003-02-25$17.67$17.67354,300
2003-02-24$17.31$17.31261,900
2003-02-21$17.50$17.50328,300
2003-02-20$17.27$17.27300,900
2003-02-19$17.52$17.52251,800
2003-02-18$17.56$17.56309,200
2003-02-14$17.25$17.25380,500
2003-02-13$17.04$17.04552,500
2003-02-12$17.00$17.00416,700
2003-02-11$17.39$17.39443,100
2003-02-10$17.40$17.40396,400
2003-02-07$17.89$17.89464,100
2003-02-06$17.74$17.74627,700
2003-02-05$18.44$18.44364,200
2003-02-04$18.84$18.84374,000
2003-02-03$18.85$18.85213,700
2003-01-31$18.73$18.731,506,000
2003-01-30$19.09$19.09961,100
2003-01-29$20.50$20.50518,800
2003-01-28$20.51$20.51363,300
2003-01-27$20.14$20.14458,500
2003-01-24$20.63$20.63398,000
2003-01-23$21.11$21.11396,600
2003-01-22$21.12$21.12458,400
2003-01-21$20.87$20.87447,900
2003-01-17$21.27$21.27327,200
2003-01-16$21.00$21.00674,900
2003-01-15$19.95$19.95265,700
2003-01-14$20.35$20.35499,100
2003-01-13$19.90$19.90354,300
2003-01-10$19.29$19.29283,000
2003-01-09$19.11$19.11403,600
2003-01-08$18.94$18.94504,300
2003-01-07$19.42$19.421,203,200
2003-01-06$18.70$18.70618,200
2003-01-03$18.56$18.56196,100
2003-01-02$19.09$19.09307,500