1995–today   1993–1994   1990–1992   since going public (1986)–1989 Changes in capital structure since going public 1986–1989 year what bearer shares (BS) registered shares (RS) participat. certificates (PC) 1989 status at year end 31,200 48,000 18,004  1) 1989 20% capital increase +5,200 +8,000 +3,000 1989 creation of approved capital (8,000 BS, 2,000 RS, 3,000 PC) 1987 status at year end 26,000 40,000 15,000 1987 PC placed +15,000 1987 warrant issue launched  2) 1986 BS placed on occasion of going public  3) +18,000 1986 status before going public 8,000 40,000 1) Incl. 4 options on PC exercised (from warrant issue in 1987) 2) Options on 30,000 PC 3) The shares were placed at CHF 2,000 each.     The annual general meeting approved the creation of 50,000 participation     certificates (nominal value CHF 100) and authorized the board to issue them