3D SYSTEMS CORP — Director's Dealing 2011

May 6, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3D SYSTEMS CORP (TDSC)
CIK: 0000910638
Period of Report: 2011-05-05

Reporting Person: MOORE KEVIN S (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-05-05	Common Stock	M	10000	$16.055	Acquired	35150	Direct
2011-05-05	Common Stock	S	400	$39.01	Disposed	34750	Direct
2011-05-05	Common Stock	S	100	$39.02	Disposed	34650	Direct
2011-05-05	Common Stock	S	300	$39.03	Disposed	34350	Direct
2011-05-05	Common Stock	S	1400	$39.04	Disposed	32950	Direct
2011-05-05	Common Stock	S	100	$39.05	Disposed	32850	Direct
2011-05-05	Common Stock	S	100	$39.07	Disposed	32750	Direct
2011-05-05	Common Stock	S	300	$39.09	Disposed	32450	Direct
2011-05-05	Common Stock	S	100	$39.10	Disposed	32350	Direct
2011-05-05	Common Stock	S	400	$39.13	Disposed	31950	Direct
2011-05-05	Common Stock	S	600	$39.15	Disposed	31350	Direct
2011-05-05	Common Stock	S	200	$39.17	Disposed	31150	Direct
2011-05-05	Common Stock	S	100	$39.18	Disposed	31050	Direct
2011-05-05	Common Stock	S	500	$39.19	Disposed	30550	Direct
2011-05-05	Common Stock	S	800	$39.20	Disposed	29750	Direct
2011-05-05	Common Stock	S	100	$39.205	Disposed	29650	Direct
2011-05-05	Common Stock	S	500	$39.21	Disposed	29150	Direct
2011-05-05	Common Stock	S	100	$39.22	Disposed	29050	Direct
2011-05-05	Common Stock	S	600	$39.24	Disposed	28450	Direct
2011-05-05	Common Stock	S	1400	$39.25	Disposed	27050	Direct
2011-05-05	Common Stock	S	200	$39.31	Disposed	26850	Direct
2011-05-05	Common Stock	S	400	$39.32	Disposed	26450	Direct
2011-05-05	Common Stock	S	200	$39.33	Disposed	26250	Direct
2011-05-05	Common Stock	S	100	$39.335	Disposed	26150	Direct
2011-05-05	Common Stock	S	300	$39.34	Disposed	25850	Direct
2011-05-05	Common Stock	S	100	$39.36	Disposed	25750	Direct
2011-05-05	Common Stock	S	100	$39.37	Disposed	25650	Direct
2011-05-05	Common Stock	S	500	$39.40	Disposed	25150	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-05-05	Stock Option (Right to Buy)	$16.055	M	10000	Disposed	2011-05-09	Common Stock (10000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1560857	Indirect

Footnotes

F1: These securities are beneficially owned through The Clark Estates, Inc., a New York corporation, of which the Reporting Person is President and a director.

F2: Above reporting person disclaims beneficial ownership of these securities except to the extent of any pecuniary interest therin.

F3: The shares subject to this option vested over a period of three years, in equal annual installments of 3,333 shares per year for the first two years and in an amount of 3,334 for the third year, commencing on May 9, 2002, the first anniversary of the date of grant.

F4: Granted as compensation for services as director.