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 — 1997

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1997-12-31$8.56$8.56122,900
1997-12-30$8.75$8.75113,100
1997-12-29$8.50$8.5090,100
1997-12-26$8.50$8.5033,500
1997-12-24$9.00$9.0047,900
1997-12-23$9.00$9.0070,400
1997-12-22$8.88$8.8771,600
1997-12-19$8.75$8.7554,900
1997-12-18$8.75$8.7540,000
1997-12-17$9.00$9.0068,900
1997-12-16$9.56$9.5653,300
1997-12-15$9.13$9.1362,900
1997-12-12$9.31$9.3179,100
1997-12-11$8.75$8.7550,300
1997-12-10$9.19$9.1926,000
1997-12-09$9.50$9.5028,000
1997-12-08$9.75$9.7526,900
1997-12-05$10.13$10.1224,400
1997-12-04$9.81$9.8144,500
1997-12-03$9.75$9.7571,000
1997-12-02$9.88$9.8749,400
1997-12-01$10.38$10.3788,800
1997-11-28$9.88$9.8711,400
1997-11-26$9.88$9.8736,900
1997-11-25$9.13$9.1353,100
1997-11-24$9.50$9.5043,200
1997-11-21$10.13$10.1226,500
1997-11-20$10.06$10.0629,800
1997-11-19$10.06$10.0624,300
1997-11-18$10.25$10.2516,200
1997-11-17$10.25$10.2520,200
1997-11-14$10.44$10.4420,500
1997-11-13$10.13$10.1275,700
1997-11-12$10.38$10.3760,300
1997-11-11$10.69$10.6916,000
1997-11-10$10.88$10.8731,700
1997-11-07$10.38$10.3761,500
1997-11-06$11.00$11.0058,200
1997-11-05$11.38$11.3836,600
1997-11-04$10.94$10.9417,400
1997-11-03$11.00$11.0028,800
1997-10-31$10.44$10.4428,700
1997-10-30$10.50$10.5056,700
1997-10-29$10.75$10.7577,100
1997-10-28$10.63$10.6290,400
1997-10-27$10.38$10.3777,200
1997-10-24$11.13$11.1226,200
1997-10-23$11.50$11.5070,300
1997-10-22$11.81$11.8126,900
1997-10-21$11.50$11.5061,900
1997-10-20$10.75$10.75189,700
1997-10-17$11.38$11.3876,000
1997-10-16$11.63$11.6244,000
1997-10-15$12.38$12.3763,200
1997-10-14$12.50$12.5077,200
1997-10-13$11.75$11.7577,900
1997-10-10$12.63$12.62128,600
1997-10-09$13.00$13.00276,300
1997-10-08$11.94$11.94189,300
1997-10-07$11.50$11.5089,400
1997-10-06$11.19$11.1986,100
1997-10-03$10.88$10.8769,000
1997-10-02$10.50$10.5083,200
1997-10-01$10.00$10.00176,600
1997-09-30$11.19$11.19679,300
1997-09-29$9.81$9.819,500
1997-09-26$10.00$10.0062,500
1997-09-25$10.03$10.0359,700
1997-09-24$10.06$10.0633,500
1997-09-23$10.06$10.0634,600
1997-09-22$10.13$10.1232,500
1997-09-19$10.38$10.37113,100
1997-09-18$10.13$10.12101,400
1997-09-17$10.00$10.00385,200
1997-09-16$9.03$9.03304,600
1997-09-15$9.00$9.00115,500
1997-09-12$8.88$8.8783,800
1997-09-11$8.75$8.7516,100
1997-09-10$8.75$8.75119,100
1997-09-09$8.88$8.8744,900
1997-09-08$8.88$8.87160,100
1997-09-05$9.00$9.0038,500
1997-09-04$9.00$9.0031,400
1997-09-03$9.00$9.0026,000
1997-09-02$9.00$9.0061,700
1997-08-29$9.25$9.2513,200
1997-08-28$9.25$9.2564,300
1997-08-27$9.25$9.2532,200
1997-08-26$8.88$8.87116,300
1997-08-25$9.13$9.1311,400
1997-08-22$9.38$9.3729,200
1997-08-21$9.38$9.3728,300
1997-08-20$9.38$9.3719,900
1997-08-19$9.50$9.5026,200
1997-08-18$9.88$9.8760,000
1997-08-15$9.13$9.1365,700
1997-08-14$9.38$9.3725,200
1997-08-13$9.31$9.31100,400
1997-08-12$9.38$9.3783,900
1997-08-11$9.75$9.7534,700
1997-08-08$9.63$9.6335,700
1997-08-07$10.00$10.0068,500
1997-08-06$9.88$9.8772,200
1997-08-05$10.25$10.2589,100
1997-08-04$10.13$10.12109,300
1997-08-01$10.25$10.25196,700
1997-07-31$10.00$10.00161,600
1997-07-30$9.69$9.6950,200
1997-07-29$10.13$10.1221,800
1997-07-28$9.88$9.8741,100
1997-07-25$10.13$10.1286,200
1997-07-24$10.50$10.50332,300
1997-07-23$9.13$9.13135,800
1997-07-22$9.25$9.2545,600
1997-07-21$9.63$9.6379,300
1997-07-18$9.75$9.75109,000
1997-07-17$9.88$9.8769,100
1997-07-16$10.50$10.50182,800
1997-07-15$10.00$10.0038,500
1997-07-14$9.75$9.7542,100
1997-07-11$9.75$9.7513,600
1997-07-10$9.75$9.7526,300
1997-07-09$9.75$9.7550,400
1997-07-08$9.50$9.5050,600
1997-07-07$9.63$9.63125,500
1997-07-03$9.81$9.8130,900
1997-07-02$10.13$10.1234,400
1997-07-01$10.00$10.0061,600
1997-06-30$10.13$10.1292,400
1997-06-27$10.13$10.1288,300
1997-06-26$10.44$10.44223,200
1997-06-25$10.00$10.00160,100
1997-06-24$10.13$10.1258,700
1997-06-23$10.13$10.1286,600
1997-06-20$10.13$10.1273,200
1997-06-19$10.25$10.2552,300
1997-06-18$10.25$10.2584,400
1997-06-17$10.63$10.62139,800
1997-06-16$10.25$10.2533,500
1997-06-13$10.00$10.00133,800
1997-06-12$10.25$10.2599,600
1997-06-11$10.50$10.5057,600
1997-06-10$10.88$10.8740,500
1997-06-09$10.63$10.6239,500
1997-06-06$11.00$11.0084,400
1997-06-05$10.88$10.8730,200
1997-06-04$10.88$10.8771,100
1997-06-03$10.63$10.6224,000
1997-06-02$10.50$10.5060,100
1997-05-30$10.63$10.62104,500
1997-05-29$10.63$10.6254,600
1997-05-28$11.00$11.0041,800
1997-05-27$11.13$11.12115,900
1997-05-23$11.25$11.25177,700
1997-05-22$10.38$10.3780,100
1997-05-21$11.00$11.0043,600
1997-05-20$10.88$10.87108,400
1997-05-19$10.63$10.62177,700
1997-05-16$10.63$10.62169,400
1997-05-15$11.13$11.12315,500
1997-05-14$11.50$11.50919,300
1997-05-13$11.89$11.893,472,700
1997-05-12$7.88$7.8779,900
1997-05-09$8.50$8.5059,100
1997-05-08$8.50$8.5053,100
1997-05-07$8.63$8.63258,000
1997-05-06$8.38$8.37187,500
1997-05-05$7.50$7.5060,200
1997-05-02$7.25$7.25115,600
1997-05-01$6.50$6.50108,800
1997-04-30$6.50$6.50127,100
1997-04-29$6.75$6.7532,900
1997-04-28$6.88$6.87134,500
1997-04-25$7.06$7.0687,800
1997-04-24$7.38$7.3743,700
1997-04-23$7.25$7.25244,800
1997-04-22$7.63$7.6280,100
1997-04-21$7.63$7.6262,300
1997-04-18$7.52$7.5226,300
1997-04-17$7.63$7.62107,700
1997-04-16$7.38$7.3733,200
1997-04-15$7.56$7.5638,500
1997-04-14$7.75$7.7533,400
1997-04-11$7.69$7.6942,800
1997-04-10$8.00$8.0049,900
1997-04-09$7.75$7.7550,700
1997-04-08$7.25$7.25113,300
1997-04-07$8.13$8.1380,300
1997-04-04$8.63$8.63364,600
1997-04-03$7.13$7.13416,600
1997-04-02$8.00$8.00746,000
1997-04-01$8.00$8.0059,800
1997-03-31$8.00$8.00132,500
1997-03-27$8.50$8.5065,600
1997-03-26$8.75$8.7538,500
1997-03-25$9.38$9.37117,200
1997-03-24$9.50$9.50184,400
1997-03-21$8.50$8.50115,900
1997-03-20$7.88$7.87162,100
1997-03-19$7.50$7.5083,100
1997-03-18$7.88$7.87129,500
1997-03-17$8.13$8.1372,400
1997-03-14$8.13$8.13143,400
1997-03-13$8.50$8.5040,700
1997-03-12$8.44$8.4470,900
1997-03-11$8.63$8.63112,500
1997-03-10$9.25$9.2542,400
1997-03-07$9.50$9.5078,300
1997-03-06$9.75$9.7535,600
1997-03-05$9.50$9.5080,200
1997-03-04$9.88$9.87155,000
1997-03-03$9.98$9.9874,500
1997-02-28$10.00$10.0099,000
1997-02-27$9.75$9.7547,500
1997-02-26$9.75$9.7545,500
1997-02-25$9.63$9.63100,000
1997-02-24$9.94$9.94176,100
1997-02-21$10.00$10.0061,200
1997-02-20$10.00$10.0091,200
1997-02-19$9.88$9.8729,800
1997-02-18$10.00$10.0070,100
1997-02-14$10.13$10.1251,200
1997-02-13$10.00$10.0045,900
1997-02-12$10.13$10.1232,400
1997-02-11$9.88$9.8749,700
1997-02-10$9.88$9.8766,200
1997-02-07$10.13$10.12104,100
1997-02-06$10.63$10.62147,700
1997-02-05$10.13$10.12105,300
1997-02-04$10.25$10.25110,100
1997-02-03$9.50$9.50147,700
1997-01-31$9.75$9.75189,200
1997-01-30$9.50$9.50184,300
1997-01-29$9.63$9.6342,600
1997-01-28$9.88$9.87125,000
1997-01-27$10.25$10.2596,000
1997-01-24$10.25$10.25100,500
1997-01-23$10.38$10.37109,400
1997-01-22$10.50$10.50191,000
1997-01-21$10.50$10.50316,300
1997-01-20$11.13$11.121,007,300
1997-01-17$9.63$9.63223,100
1997-01-16$9.13$9.13279,400
1997-01-15$9.13$9.13915,100
1997-01-14$8.56$8.561,749,900
1997-01-13$9.38$9.375,630,400
1997-01-10$10.88$10.872,050,600
1997-01-09$19.13$19.12210,600
1997-01-08$19.38$19.38418,700
1997-01-07$19.13$19.12426,400
1997-01-06$18.50$18.50553,500
1997-01-03$18.00$18.00336,400
1997-01-02$17.13$17.12454,200