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SEC Filings Group 3,4,5Annual FilingsCurrent ReportsMergers & AcquisitionsOtherProxy FilingsQuarterly FilingsRegistration Statements Filing year - Any -202420232022202120202019201820172016201520142013201220112010200920082007200620052004200320022001200019991998199719961995 Items per page 102550 Filing date Form Description Filing Group View April 03, 2012 4 Statement of changes in beneficial ownership of securities 3,4,5 0000790816-12-000052.pdf 0000790816-12-000052.rtf View HTML April 03, 2012 4 Statement of changes in beneficial ownership of securities 3,4,5 0000790816-12-000054.pdf 0000790816-12-000054.rtf View HTML April 03, 2012 4 Statement of changes in beneficial ownership of securities 3,4,5 0000790816-12-000056.pdf 0000790816-12-000056.rtf View HTML April 03, 2012 4 Statement of changes in beneficial ownership of securities 3,4,5 0000790816-12-000058.pdf 0000790816-12-000058.rtf View HTML May 02, 2012 4 Statement of changes in beneficial ownership of securities 3,4,5 0000790816-12-000070.pdf 0000790816-12-000070.rtf View HTML May 04, 2012 4 Statement of changes in beneficial ownership of securities 3,4,5 0000790816-12-000074.pdf 0000790816-12-000074.rtf View HTML May 15, 2012 4 Statement of changes in beneficial ownership of securities 3,4,5 0000790816-12-000076.pdf 0000790816-12-000076.rtf View HTML May 29, 2012 4 Statement of changes in beneficial ownership of securities 3,4,5 0000790816-12-000079.pdf 0000790816-12-000079.rtf View HTML June 01, 2012 4 Statement of changes in beneficial ownership of securities 3,4,5 0000790816-12-000092.pdf 0000790816-12-000092.rtf View HTML June 01, 2012 4 Statement of changes in beneficial ownership of securities 3,4,5 0000790816-12-000093.pdf 0000790816-12-000093.rtf View HTML Pagination First page « First Previous page ‹ Previous Page 1 Page 2 Page 3 Page 4 Current page 5 Page 6 Page 7 Page 8 Page 9 … Next page Next › Last page Last » Data provided by Kaleidoscope.