X0201 4 2003-10-28 0 0001001233 SANGAMO BIOSCIENCES INC SGMO 0001234384 BLUFORD PETER C/O SANGAMO BIOSCIENCES IN STE.A-100 POINT RICHMOND TECH CENTER 501 CANA BLVD RICHMOND CA 94804 0 1 0 0 V.P., Corporate Development Common Stock 2003-10-28 4 S 0 500 5.09 D 155591 D Common Stock 400 I By Trust for Son Common Stock 400 I By Trust for Son Common Stock 400 I By Trust for Daughter The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan adopted by the Reporting Person on April 22, 2003. Reporting Person disclaims beneficial ownership of the shares held by each of his children and this report shall not be deemed to be an admission that Mr. Bluford is the beneficial owner of such securities for purposes of Section 16 or for any other purpose /s/ Peter Bluford 2003-10-28