0000950123-01-002016 SC 13D 5 20010305 INDIGO ACQUISITION CORP INVERESK RESEARCH (CANADA) INC INVERESK RESEARCH GROUP LTD CLINTRIALS RESEARCH INC 0000870978 8734 621406017 DE 1231 SC 13D 34 005-48381 1561490 11000 WESTON PARKWAY CARY NC 27513 9194622556 11000 WESTON PARKWAY CARY NC 27513 CLINTRIALS INC 19930930 INVERESK RESEARCH GROUP LTD 0001135362 000000000 1231 SC 13D ELPHINSTONE RESEARCH CENTRE TRANENT, EAST LOTHIAN EH33 2NE UNITED KINGDOM 4401875614545 SC 13D 1 y46160sc13d.txt SCHEDULE 13D EX-99.1 2 y46160ex99-1.txt JOINT FILING AGREEMENT EX-99.2.A 3 y46160ex99-2_a.txt OFFER TO PURCHASE EX-99.2.B 4 y46160ex99-2_b.txt AGREEMENT AND PLAN OF MERGER EX-99.2.C 5 y46160ex99-2_c.txt STOCKHOLDERS AGREEMENT