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.

View year

Historical Stock Price — 1999

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1999-12-31$12.75$12.7551,500
1999-12-30$12.13$12.13163,100
1999-12-29$12.25$12.25186,400
1999-12-28$10.28$10.28143,300
1999-12-27$10.56$10.56214,500
1999-12-23$9.31$9.31139,900
1999-12-22$8.94$8.9472,100
1999-12-21$8.75$8.7550,300
1999-12-20$8.75$8.7572,000
1999-12-17$8.59$8.59112,600
1999-12-16$8.63$8.63127,900
1999-12-15$8.88$8.87210,700
1999-12-14$9.06$9.06109,300
1999-12-13$9.06$9.0680,700
1999-12-10$9.06$9.06221,100
1999-12-09$10.00$10.00416,300
1999-12-08$8.50$8.50185,400
1999-12-07$8.50$8.50126,400
1999-12-06$8.09$8.0961,300
1999-12-03$7.91$7.9126,700
1999-12-02$8.00$8.0056,500
1999-12-01$7.88$7.8714,900
1999-11-30$7.63$7.6283,200
1999-11-29$7.69$7.6977,000
1999-11-26$7.56$7.5631,400
1999-11-24$7.63$7.6263,900
1999-11-23$7.50$7.5068,400
1999-11-22$7.69$7.6960,500
1999-11-19$8.13$8.1355,400
1999-11-18$8.75$8.7560,100
1999-11-17$8.75$8.75100,500
1999-11-16$9.00$9.00229,900
1999-11-15$8.13$8.13113,200
1999-11-12$7.50$7.5019,700
1999-11-11$7.31$7.3118,800
1999-11-10$7.56$7.5614,800
1999-11-09$7.81$7.8118,600
1999-11-08$7.81$7.8121,300
1999-11-05$7.94$7.9435,300
1999-11-04$7.75$7.7516,400
1999-11-03$7.69$7.6921,400
1999-11-02$7.75$7.7531,400
1999-11-01$7.69$7.6918,200
1999-10-29$8.00$8.0035,600
1999-10-28$8.06$8.0664,900
1999-10-27$8.13$8.1332,000
1999-10-26$8.00$8.0092,300
1999-10-25$7.88$7.8776,700
1999-10-22$8.00$8.0084,300
1999-10-21$7.38$7.3754,600
1999-10-20$7.13$7.1346,300
1999-10-19$6.91$6.9163,500
1999-10-18$6.69$6.69140,700
1999-10-15$7.33$7.3347,000
1999-10-14$7.75$7.7594,500
1999-10-13$7.25$7.259,300
1999-10-12$7.69$7.6928,800
1999-10-11$7.81$7.8118,100
1999-10-08$8.00$8.0041,700
1999-10-07$8.00$8.008,700
1999-10-06$8.13$8.1319,600
1999-10-05$8.13$8.1339,100
1999-10-04$7.69$7.6918,100
1999-10-01$7.94$7.9426,800
1999-09-30$8.13$8.1367,100
1999-09-29$7.88$7.8767,800
1999-09-28$7.94$7.9429,500
1999-09-27$8.00$8.00214,100
1999-09-24$8.00$8.0067,800
1999-09-23$8.00$8.0052,600
1999-09-22$8.03$8.0321,400
1999-09-21$8.00$8.0037,700
1999-09-20$8.00$8.0041,000
1999-09-17$8.03$8.0342,700
1999-09-16$8.06$8.0661,500
1999-09-15$8.19$8.1945,900
1999-09-14$8.19$8.1967,700
1999-09-13$7.94$7.9458,500
1999-09-10$8.00$8.0056,800
1999-09-09$8.00$8.00178,300
1999-09-08$7.88$7.8782,800
1999-09-07$8.06$8.0635,700
1999-09-03$7.91$7.91210,100
1999-09-02$7.44$7.44311,400
1999-09-01$9.56$9.5635,400
1999-08-31$9.50$9.5062,600
1999-08-30$9.41$9.4155,900
1999-08-27$9.50$9.5022,700
1999-08-26$9.44$9.4423,500
1999-08-25$9.50$9.5047,100
1999-08-24$9.44$9.4436,900
1999-08-23$9.88$9.8736,500
1999-08-20$9.50$9.5014,200
1999-08-19$9.44$9.4462,600
1999-08-18$9.50$9.50113,000
1999-08-17$9.63$9.6348,400
1999-08-16$9.81$9.81108,600
1999-08-13$9.50$9.5099,600
1999-08-12$9.38$9.37106,200
1999-08-11$9.00$9.0053,300
1999-08-10$8.63$8.6331,500
1999-08-09$8.78$8.7841,900
1999-08-06$8.56$8.5627,600
1999-08-05$8.63$8.6358,300
1999-08-04$8.63$8.6375,200
1999-08-03$8.59$8.5988,300
1999-08-02$8.63$8.63110,200
1999-07-30$8.38$8.3760,300
1999-07-29$8.13$8.1338,000
1999-07-28$8.56$8.5613,100
1999-07-27$8.56$8.56167,200
1999-07-26$8.56$8.5632,100
1999-07-23$8.56$8.5638,800
1999-07-22$8.78$8.7855,700
1999-07-21$8.63$8.6333,600
1999-07-20$8.16$8.1674,400
1999-07-19$8.13$8.13130,800
1999-07-16$8.19$8.1941,900
1999-07-15$8.00$8.0077,300
1999-07-14$8.50$8.5043,300
1999-07-13$8.63$8.6357,300
1999-07-12$8.63$8.6325,000
1999-07-09$8.63$8.6341,400
1999-07-08$8.63$8.6384,100
1999-07-07$8.38$8.3782,900
1999-07-06$8.34$8.3466,000
1999-07-02$8.38$8.3753,500
1999-07-01$8.50$8.50116,400
1999-06-30$7.81$7.81180,800
1999-06-29$8.00$8.00132,600
1999-06-28$7.44$7.4453,400
1999-06-25$7.25$7.2568,200
1999-06-24$7.06$7.06111,300
1999-06-23$7.00$7.0079,600
1999-06-22$7.00$7.0047,200
1999-06-21$6.81$6.8147,800
1999-06-18$6.91$6.9166,500
1999-06-17$6.56$6.568,500
1999-06-16$6.81$6.8125,300
1999-06-15$6.38$6.3722,700
1999-06-14$6.44$6.4417,800
1999-06-11$6.63$6.6238,100
1999-06-10$6.69$6.6936,200
1999-06-09$6.75$6.75109,400
1999-06-08$6.88$6.8714,600
1999-06-07$6.94$6.9410,100
1999-06-04$7.00$7.0040,300
1999-06-03$6.88$6.8767,000
1999-06-02$7.00$7.0073,800
1999-06-01$7.13$7.1392,000
1999-05-28$7.13$7.1376,800
1999-05-27$6.88$6.8714,500
1999-05-26$7.13$7.1396,400
1999-05-25$7.13$7.1331,200
1999-05-24$7.13$7.1359,300
1999-05-21$7.19$7.19159,100
1999-05-20$6.63$6.6241,100
1999-05-19$6.97$6.9726,800
1999-05-18$6.94$6.9471,900
1999-05-17$6.56$6.5635,600
1999-05-14$6.56$6.5645,600
1999-05-13$6.81$6.8175,000
1999-05-12$6.25$6.2533,100
1999-05-11$6.38$6.3712,000
1999-05-10$6.33$6.3328,500
1999-05-07$6.38$6.3720,800
1999-05-06$6.38$6.3716,800
1999-05-05$6.31$6.3193,500
1999-05-04$6.38$6.3720,400
1999-05-03$6.63$6.62113,300
1999-04-30$6.63$6.6234,600
1999-04-29$6.50$6.5017,200
1999-04-28$6.63$6.6216,200
1999-04-27$6.88$6.8735,400
1999-04-26$6.69$6.6962,100
1999-04-23$6.25$6.2532,700
1999-04-22$6.00$6.0026,500
1999-04-21$6.13$6.1367,100
1999-04-20$6.00$6.0042,500
1999-04-19$5.94$5.9467,200
1999-04-16$6.56$6.5669,300
1999-04-15$6.72$6.7266,300
1999-04-14$6.31$6.3187,200
1999-04-13$6.25$6.2558,300
1999-04-12$6.34$6.3433,100
1999-04-09$6.38$6.3771,300
1999-04-08$5.75$5.75147,700
1999-04-07$5.56$5.56174,800
1999-04-06$6.00$6.00164,300
1999-04-05$6.50$6.5061,100
1999-04-01$6.56$6.5630,400
1999-03-31$6.63$6.62103,400
1999-03-30$6.50$6.50157,800
1999-03-29$6.56$6.5662,000
1999-03-26$6.50$6.50104,400
1999-03-25$6.73$6.73191,400
1999-03-24$6.56$6.56110,300
1999-03-23$6.63$6.62118,900
1999-03-22$7.25$7.2533,600
1999-03-19$7.31$7.3151,500
1999-03-18$7.38$7.3745,500
1999-03-17$7.31$7.3130,100
1999-03-16$7.63$7.62139,600
1999-03-15$7.88$7.8725,100
1999-03-12$7.75$7.7550,700
1999-03-11$7.75$7.7547,300
1999-03-10$7.56$7.5645,700
1999-03-09$7.38$7.3779,500
1999-03-08$7.56$7.5640,400
1999-03-05$7.63$7.62122,100
1999-03-04$7.69$7.6921,500
1999-03-03$7.63$7.6221,000
1999-03-02$7.63$7.6225,100
1999-03-01$7.69$7.6933,700
1999-02-26$7.75$7.7525,300
1999-02-25$7.63$7.6246,700
1999-02-24$7.50$7.5045,700
1999-02-23$7.63$7.6234,100
1999-02-22$7.63$7.6255,200
1999-02-19$7.75$7.7519,600
1999-02-18$7.77$7.7722,300
1999-02-17$7.94$7.9433,400
1999-02-16$8.25$8.2554,400
1999-02-12$8.13$8.1334,700
1999-02-11$8.31$8.3147,600
1999-02-10$7.75$7.7536,600
1999-02-09$7.81$7.8139,700
1999-02-08$8.31$8.3125,800
1999-02-05$8.25$8.2598,300
1999-02-04$9.00$9.00107,600
1999-02-03$8.50$8.50286,700
1999-02-02$9.88$9.871,047,000
1999-02-01$7.56$7.5645,700
1999-01-29$8.00$8.0029,300
1999-01-28$7.88$7.8739,900
1999-01-27$7.69$7.6939,100
1999-01-26$8.13$8.1328,600
1999-01-25$7.75$7.7516,000
1999-01-22$8.06$8.0660,700
1999-01-21$7.75$7.7530,800
1999-01-20$8.00$8.0036,100
1999-01-19$7.50$7.5066,500
1999-01-15$7.88$7.8749,500
1999-01-14$6.97$6.9750,800
1999-01-13$7.50$7.5038,000
1999-01-12$7.25$7.2533,200
1999-01-11$7.44$7.4441,300
1999-01-08$7.50$7.5036,100
1999-01-07$8.00$8.0028,500
1999-01-06$8.13$8.13102,200
1999-01-05$7.94$7.94133,700
1999-01-04$7.94$7.94207,000