0000920371-99-000042 4 1 19990831 19990909 SIMPSON MANUFACTURING CO INC /CA/ 0000920371 3420 943196943 DE 1231 4 34 001-13429 99708528 4637 CHABOT DR STE 200 PLEASANTON CA 94588 5106099912 4637 CHABOT DR STE 200 PLEASANTON CA 94588 TOWSEND DONALD M 0001036046 OFFICER 4 4637 CHABOT DRIVE SUITE 200 PLEASANTON CA 94588 4637 CHABOT DRIVE SUITE 200 PLEASANTON CA 94588 4 1 000092037199000042-001-seq1-4.txt FORM 4 - AUGUST 1999