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 — 1998

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1998-12-31$7.38$7.37301,300
1998-12-30$6.75$6.75131,000
1998-12-29$6.69$6.69153,900
1998-12-28$6.75$6.7589,200
1998-12-24$6.88$6.8773,200
1998-12-23$6.63$6.62105,800
1998-12-22$6.75$6.7542,900
1998-12-21$7.25$7.2534,300
1998-12-18$7.50$7.5057,500
1998-12-17$6.94$6.9452,400
1998-12-16$7.25$7.2532,900
1998-12-15$7.38$7.3761,000
1998-12-14$7.19$7.1926,600
1998-12-11$7.63$7.6240,000
1998-12-10$7.13$7.13258,600
1998-12-09$7.88$7.8740,200
1998-12-08$7.69$7.6935,100
1998-12-07$7.81$7.8128,500
1998-12-04$7.94$7.9440,500
1998-12-03$7.94$7.94120,400
1998-12-02$7.75$7.75127,100
1998-12-01$8.13$8.1327,300
1998-11-30$8.25$8.2557,500
1998-11-27$8.13$8.1326,000
1998-11-25$8.13$8.1339,600
1998-11-24$8.38$8.3754,300
1998-11-23$8.31$8.3146,300
1998-11-20$8.13$8.1327,800
1998-11-19$8.00$8.0049,500
1998-11-18$7.94$7.9432,400
1998-11-17$7.63$7.6249,800
1998-11-16$7.75$7.7536,100
1998-11-13$7.50$7.5020,000
1998-11-12$7.75$7.7524,400
1998-11-11$7.77$7.7770,300
1998-11-10$7.81$7.8137,600
1998-11-09$8.13$8.1350,000
1998-11-06$8.50$8.5046,000
1998-11-05$7.88$7.8726,700
1998-11-04$7.50$7.5039,200
1998-11-03$8.13$8.1338,900
1998-11-02$8.44$8.4499,700
1998-10-30$8.25$8.25118,100
1998-10-29$8.56$8.56137,200
1998-10-28$8.31$8.3161,200
1998-10-27$7.50$7.50117,300
1998-10-26$8.50$8.50122,800
1998-10-23$8.25$8.2540,700
1998-10-22$8.00$8.00151,700
1998-10-21$7.38$7.37121,400
1998-10-20$7.38$7.3765,800
1998-10-19$7.50$7.5082,000
1998-10-16$6.50$6.5067,200
1998-10-15$6.13$6.1344,900
1998-10-14$6.00$6.0078,800
1998-10-13$6.06$6.0693,800
1998-10-12$7.13$7.1318,300
1998-10-09$7.19$7.1949,300
1998-10-08$7.13$7.1354,500
1998-10-07$7.13$7.1388,200
1998-10-06$7.13$7.1325,700
1998-10-05$7.25$7.25103,900
1998-10-02$7.00$7.0037,600
1998-10-01$6.63$6.6238,400
1998-09-30$7.69$7.6931,400
1998-09-29$7.94$7.9477,100
1998-09-28$8.16$8.1636,100
1998-09-25$8.31$8.3137,400
1998-09-24$8.06$8.0658,600
1998-09-23$8.25$8.2583,600
1998-09-22$7.86$7.8657,100
1998-09-21$7.88$7.87132,000
1998-09-18$7.94$7.94112,300
1998-09-17$8.00$8.00158,600
1998-09-16$8.25$8.2581,200
1998-09-15$7.31$7.3152,600
1998-09-14$7.13$7.1344,600
1998-09-11$6.75$6.7513,400
1998-09-10$6.63$6.6275,200
1998-09-09$6.38$6.37217,000
1998-09-08$6.59$6.5958,200
1998-09-04$5.88$5.8838,200
1998-09-03$6.13$6.1325,100
1998-09-02$6.75$6.7554,300
1998-09-01$6.13$6.13124,700
1998-08-31$6.56$6.5641,900
1998-08-28$6.69$6.6950,600
1998-08-27$6.25$6.25110,300
1998-08-26$6.31$6.3152,800
1998-08-25$6.88$6.8768,500
1998-08-24$6.81$6.8189,100
1998-08-21$6.75$6.7569,400
1998-08-20$6.72$6.7247,300
1998-08-19$7.05$7.0515,600
1998-08-18$7.06$7.0685,500
1998-08-17$7.06$7.0617,300
1998-08-14$7.13$7.1337,200
1998-08-13$7.22$7.2286,400
1998-08-12$7.19$7.1948,700
1998-08-11$7.25$7.25136,700
1998-08-10$7.88$7.8723,100
1998-08-07$7.63$7.6265,100
1998-08-06$7.56$7.5696,500
1998-08-05$7.41$7.41115,500
1998-08-04$7.44$7.44189,100
1998-08-03$7.75$7.7550,500
1998-07-31$8.00$8.0071,700
1998-07-30$8.31$8.3136,600
1998-07-29$8.44$8.4474,300
1998-07-28$7.97$7.9744,700
1998-07-27$8.00$8.0025,100
1998-07-24$7.94$7.9422,700
1998-07-23$7.94$7.9440,300
1998-07-22$8.00$8.0025,100
1998-07-21$8.00$8.0070,100
1998-07-20$7.88$7.8767,900
1998-07-17$8.06$8.0667,200
1998-07-16$9.05$9.0531,100
1998-07-15$9.13$9.13364,200
1998-07-14$9.00$9.0051,700
1998-07-13$9.00$9.0064,800
1998-07-10$9.25$9.2511,900
1998-07-09$9.25$9.2517,400
1998-07-08$9.00$9.0027,200
1998-07-07$9.25$9.2523,200
1998-07-06$9.00$9.0079,500
1998-07-02$9.06$9.0629,700
1998-07-01$9.50$9.5073,500
1998-06-30$9.22$9.22205,300
1998-06-29$8.94$8.9414,100
1998-06-26$8.88$8.8726,600
1998-06-25$9.00$9.0018,500
1998-06-24$8.63$8.6353,200
1998-06-23$8.38$8.3786,000
1998-06-22$8.50$8.5036,000
1998-06-19$8.50$8.5038,800
1998-06-18$8.94$8.9424,600
1998-06-17$9.13$9.13104,800
1998-06-16$9.00$9.0064,600
1998-06-15$8.75$8.7549,900
1998-06-12$9.00$9.0054,200
1998-06-11$9.59$9.5981,300
1998-06-10$9.00$9.0032,700
1998-06-09$9.25$9.257,200
1998-06-08$9.31$9.3120,200
1998-06-05$9.13$9.1371,700
1998-06-04$9.75$9.7518,800
1998-06-03$9.25$9.2519,800
1998-06-02$9.31$9.3124,300
1998-06-01$9.63$9.63166,200
1998-05-29$9.34$9.3444,400
1998-05-28$9.50$9.5058,000
1998-05-27$9.25$9.2576,300
1998-05-26$9.38$9.3745,600
1998-05-22$9.75$9.7541,500
1998-05-21$9.75$9.7563,200
1998-05-20$9.44$9.4417,200
1998-05-19$9.75$9.7519,200
1998-05-18$9.63$9.63107,000
1998-05-15$9.56$9.5659,500
1998-05-14$9.25$9.2538,300
1998-05-13$9.63$9.6338,400
1998-05-12$9.63$9.6378,900
1998-05-11$9.38$9.3745,900
1998-05-08$9.94$9.9466,700
1998-05-07$9.38$9.3749,800
1998-05-06$9.69$9.6960,000
1998-05-05$10.00$10.0075,700
1998-05-04$10.50$10.50144,700
1998-05-01$9.88$9.8771,500
1998-04-30$9.81$9.81162,700
1998-04-29$9.88$9.8750,500
1998-04-28$9.44$9.4443,100
1998-04-27$9.31$9.31120,400
1998-04-24$9.63$9.6395,800
1998-04-23$9.61$9.61113,100
1998-04-22$10.56$10.56124,700
1998-04-21$10.94$10.94198,400
1998-04-20$10.13$10.1290,600
1998-04-17$9.75$9.75107,300
1998-04-16$9.88$9.87125,200
1998-04-15$9.97$9.97154,200
1998-04-14$9.25$9.2571,100
1998-04-13$9.50$9.50224,200
1998-04-09$9.94$9.94428,700
1998-04-08$9.50$9.50678,100
1998-04-07$8.38$8.37221,700
1998-04-06$8.25$8.25160,800
1998-04-03$8.13$8.13167,000
1998-04-02$7.63$7.62147,900
1998-04-01$7.31$7.31139,000
1998-03-31$7.38$7.37443,100
1998-03-30$7.50$7.5033,800
1998-03-27$7.50$7.5086,700
1998-03-26$7.56$7.56128,600
1998-03-25$7.75$7.7550,200
1998-03-24$7.94$7.9499,200
1998-03-23$7.88$7.8728,700
1998-03-20$8.25$8.2554,500
1998-03-19$8.50$8.5029,900
1998-03-18$8.56$8.5667,000
1998-03-17$8.50$8.5081,400
1998-03-16$8.63$8.6391,100
1998-03-13$8.88$8.87311,500
1998-03-12$8.50$8.50250,700
1998-03-11$7.81$7.81413,200
1998-03-10$7.56$7.5687,800
1998-03-09$7.56$7.5693,900
1998-03-06$7.63$7.6263,300
1998-03-05$7.52$7.5210,800
1998-03-04$7.50$7.5047,400
1998-03-03$7.63$7.62370,000
1998-03-02$7.75$7.75185,000
1998-02-27$8.13$8.134,061,000
1998-02-26$8.25$8.2568,600
1998-02-25$8.50$8.5049,000
1998-02-24$8.38$8.3763,600
1998-02-23$8.44$8.4487,500
1998-02-20$8.63$8.6344,800
1998-02-19$8.88$8.8729,000
1998-02-18$8.69$8.6932,400
1998-02-17$8.81$8.8129,100
1998-02-13$8.56$8.56108,800
1998-02-12$8.94$8.94111,900
1998-02-11$9.50$9.50269,000
1998-02-10$7.50$7.5062,200
1998-02-09$7.38$7.37151,000
1998-02-06$7.13$7.13104,700
1998-02-05$7.13$7.1342,200
1998-02-04$7.50$7.5083,500
1998-02-03$7.50$7.5097,100
1998-02-02$7.38$7.37130,800
1998-01-30$7.00$7.0069,300
1998-01-29$7.00$7.00179,500
1998-01-28$7.13$7.1388,100
1998-01-27$7.44$7.44115,800
1998-01-26$7.50$7.5030,900
1998-01-23$7.94$7.9410,900
1998-01-22$7.94$7.9418,800
1998-01-21$7.88$7.87126,900
1998-01-20$8.50$8.5048,200
1998-01-16$8.13$8.13101,800
1998-01-15$8.38$8.3730,100
1998-01-14$8.56$8.56104,600
1998-01-13$8.38$8.3735,300
1998-01-12$8.38$8.377,700
1998-01-09$8.69$8.6932,000
1998-01-08$8.25$8.2516,200
1998-01-07$8.25$8.2583,700
1998-01-06$8.50$8.5060,600
1998-01-05$9.00$9.0044,800
1998-01-02$8.88$8.8726,700