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PAGE 1 SECURITIES AND EXCHANGE COMMISSION FORM 13F-E Report for the Calendar Year or Quarter Ended: 03/31/98 Institutional Investment Manager: INVESTOR AB ARSENALSGATAN 8C, S-103 32 STOCKHOLM SWEDEN V7 NA I REPRESENT THAT I AM AUTHORIZED TO SUBMIT THIS FORM AND THAT ALL INFORMATION IN THIS FORM AND THE ATTACHMENTS TO IT IS TRUE, CORRECT AND COMPLETE, AND I UNDERSTAND THAT ALL REQUIRED ITEMS, STATEMENTS AND SCHEDULES ARE INTEGRAL PARTS OF THIS FORM AND THAT THE SUBMISSION OF ANY AMENDMENT REPRESENTS THAT ALL UNAMENDED ITEMS, STATEMENTS AND SCHEDULES REMAIN TRUE, CORRECT AND COMPLETE AS PREVIOUSLY SUBMITTED. I AM SIGNING THIS REPORT AS REQUIRED BY THE SECURITIES EXCHANGE ACT OF 1934. Name, Title and Telephone Number of Person Submitting Report: FREDRIK NILERT VP, TREAS., & SEC. (212) 508-0900 Signature, Place and Date of Signing: /s/ FREDRIK NILERT NEW YORK NY 05/15/98 Other Managers on Whose Behalf this Report is Filed: 01 AB CATOR 02 EXTORIA TRADE AB 03 INVESTOR INTERNATIONAL (U.S.), INC. 04 INVESTOR INVESTMENTS AB 05 INVESTOR UK, LTD. 06 INVESTORS TRADING AB 07 SAAB SCANIA AB PAGE 2 VALUE SHARES/ SH/ PUT/ INVSTMT -----VOTING AUTHORITY----- NAME OF ISSUER -TITLE OF CLASS- --CUSIP-- (x$1000) PRN AMT PRN CALL DSCRETN -MANAGERS- SOLE SHARED NONE Metromedia Intl. Group Inc. COM 591695101 2137 150000 SH DEFINED 0105 150000 Swedish Match Co. COM 870309507 3167 950000 SH DEFINED 01 950000 UST Inc. COM 902911106 983 30000 SH DEFINED 01 30000 Astra AB COM CL A 046298105 3393206 82250515 SH DEFINED 0102 82137002 227026 Astra AB COM CL A 046298105 3393206 82250515 SH DEFINED 0102 82137002 227026 Astra AB COM CL B 046298204 54939 2835901 SH DEFINED 010206 2490501 345400 Scania Aktiebolag COM CL A 806018107 1114793 45504200 SH DEFINED 07 26704200 18800000 Scania Aktiebolag COM CL B 806018206 1128811 45841886 SH DEFINED 02 45558586 283300 Ericsson LM Telephone Co. COM CL B 294821400 524689 11018500 SH DEFINED 0206 10638500 380000 Forest Labs Inc. COM CL A 345838106 564 564219 SH DEFINED 04 564219 MedImmune, Inc. COM 584699102 90563 1619000 SH DEFINED 04 1619000 Neuromedical Systems, Inc. COM 64124H109 2722 1088830 SH DEFINED 04 1088830 Sylvan Learning Systems, Inc. COM 871399101 31938 685000 SH DEFINED 04 685000 Aracruz Celulose S.A. ADR CL B 038496204 3118 202000 SH DEFINED 02 202000 Asia Pulp & Paper Ltd. COM 04516V100 2194 150000 SH DEFINED 02 150000 Checkpoint Systems Inc. COM 162825013 3505 168400 SH DEFINED 02 168400 Kulicke Soffa Inds. Inc. COM 501242101 1398 65000 SH DEFINED 02 65000 SCI Systems Inc. COM 783890106 1144 30000 SH DEFINED 02 30000 Symbol Technologies Inc. COM 871508107 1244 37500 SH DEFINED 02 37500 Zygo Corp. COM 989855101 646 42000 SH DEFINED 02 42000 Cytotherapeutics Inc. COM 232923102 320 102500 SH DEFINED 03 102500 Gilead Sciences COM 375558103 2712 70000 SH DEFINED 03 70000 Human Genome Sciences, Inc. COM 444903108 794 20000 SH DEFINED 03 20000 Millennium Pharm. Inc. COM 599902103 4166 215000 SH DEFINED 03 215000 Sola Intl. Inc. COM 834092108 1941 47844 SH DEFINED 03 47844 Cambridge Tech Partners COM 132524109 2977 60000 SH DEFINED 05 60000 Industri-Matemotik Intl. Corp. COM 455792101 2620 80000 SH DEFINED 05 80000 Saville Systems PLC COM 805174109 2948 60000 SH DEFINED 05 60000 Sitel Corp. COM 81980K107 2193 175400 SH DEFINED 05 175400 Walsh Intl. Inc. COM 933131104 810 52500 SH DEFINED 05 52500 Mettler - Toledo Intl. Inc. COM CL A 592688105 24970 158034 SH DEFINED 03 1158034 Agouron Pharmaceuticals, Inc. COM 008488108 570 15000 SH DEFINED 03 15000 Vivus Inc. COM 928551100 500 40000 SH DEFINED 03 40000 Pharmacyclics Inc. COM 716933106 2636 95000 SH DEFINED 03 95000 Aktiebolag Electrolux COM 10198208 72244 873500 SH DEFINED 02 833000 40500 Robotic Vision Sys. Inc. COM 771074951 1615 142000 SH DEFINED 02 142000 ABB AB, CLB COM CL B 00256Q103 6955 500,000 SH DEFINED 06 7160000 Alkermes Inc. COM 01642T108 480 20000 SH DEFINED 03 20000 Minimed COM 60365K108 840 20000 SH DEFINED 03 20000 Novellus Sys Inc COM 670008101 1423 33000 DEFINED 02 REPORT SUMMARY 40 DATA RECORDS 9888681 7 OTHER MANAGERS ON WHOSE BEHALF REPORT IS FILED