X0303 4 2010-09-03 0 0000910638 3D SYSTEMS CORP TDSC 0001105969 MOORE KEVIN S 333 THREE D SYSTEMS CIRCLE ROCK HILL SC 29730 1 0 0 0 Common Stock 2010-09-03 4 P 0 400 13.19 A 2228257 I See Footnotes Common Stock 25150 D These securities are beneficially owned through The Clark Estates, Inc., a New York corporation, of which the Reporting Person is President and a director. The Reporting Person disclaims beneficial ownership of these securities except to the extent of any pecuniary interest therein. /s/Robert M. Grace, Jr., Attorney-in-Fact 2010-09-07