0000950123-04-014407 SC TO-I 9 20041203 20041203 REGENERON PHARMACEUTICALS INC 0000872589 2834 133444607 NY 1231 SC TO-I 34 005-41938 041184687 777 OLD SAW MILL RIVER RD TARRYTOWN NY 10591-6707 9143477000 REGENERON PHARMACEUTICALS INC 0000872589 2834 133444607 NY 1231 SC TO-I 777 OLD SAW MILL RIVER RD TARRYTOWN NY 10591-6707 9143477000 SC TO-I 1 y69289sctovi.htm ISSUER TENDER OFFER EX-99.A.1.I 2 y69289exv99waw1wi.htm EX-99.A.1.I OFFER TO EXCHANGE EX-99.A.1.II 3 y69289exv99waw1wii.htm EX-99.A.1.II FORM OF ELECTION FORM EX-99.A.1.III 4 y69289exv99waw1wiii.htm EX-99.A.1.III FORM OF NOTICE OF WITHDRAWAL EX-99.A.1.IV 5 y69289exv99waw1wiv.htm EX-99.A.1.IV FORM OF ACCEPTANCE LETTER EX-99.A.1.V 6 y69289exv99waw1wv.htm EX-99.A.1.V FORM OF COMMUNICATION EX-99.D.7 7 y69289exv99wdw7.htm EX-99.D.7 FORM OF REPLACEMENT OPTION AGREEMENT AND NOTICE OF GRANT OF REPLACEMENT OPTIONS EX-99.D.8 8 y69289exv99wdw8.htm EX-99.D.8 FORM OF REPLACMENT OPTION AGREEMENT AND NOTICE OF GRANT OF REPLACEMENT OPTIONS EX-99.D.9 9 y69289exv99wdw9.htm EX-99.D.9 FORM OF REPLACEMENT OPTION AGREEMENT AND NOTICE OF GRANT OF REPLACEMENT OPTIONS