3D SYSTEMS CORP — Director's Dealing 2011

May 19, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3D SYSTEMS CORP (TDSC)
CIK: 0000910638
Period of Report: 2011-05-18

Reporting Person: MOORE KEVIN S (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-05-18	Common Stock	A	25150	—	Acquired	50300	Direct
2011-05-18	Common Stock	A	2742	—	Acquired	53042	Direct
2011-05-18	Common Stock	A	1560857	—	Acquired	3121714	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-05-18	Stock Option (Right to Buy)	$7.12	A	10000	Acquired	2012-05-14	Common Stock (10000)	Direct
2011-05-18	Stock Option (Right to Buy)	$4.065	A	10000	Acquired	2013-08-26	Common Stock (10000)	Direct

Footnotes

F1: These options were issued to the Reporting Person pursuant to the two-for-one stock split distributed to the Corporation's stockholders on May 18, 2011.

F2: These shares were awarded to the Reporting Person pursuant to the 2004 Restricted Stock Plan for Non-Employee Directors after given effect to the stock split referred to in note 1. The Reporting Person was awarded 1,371 shares prior to this stock split at par value, or $0.001 per share.

F3: These securities are beneficially owned through The Clark Estates, Inc., a New York corporation, of which the Reporting Person is President and a director.

F4: Above reporting person disclaims beneficial ownership of these securities except to the extent of any pecuniary interest therein.

F5: These options were issued to the Reporting Person pursuant to the two-for-one stock split distributed to the Corporation's stockholders on May 18, 2011.

F6: 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 14, 2003, the first anniversary of the date of grant.

F7: Granted as compensation for services as director.

F8: 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 August 26, 2004, the first anniversary of the date of grant.