FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * MOORE KEVIN S   2. Issuer Name and Ticker or Trading Symbol 3D SYSTEMS CORP [TDSC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 333 THREE D SYSTEMS CIRCLE 3. Date of Earliest Transaction (Month/Day/Year) 05/18/2011 (Street) ROCK HILL, SC 29730 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 05/18/2011   A   25,150 (1) A (1) 50,300 D   Common Stock 05/18/2011   A   2,742 A (2) 53,042 D   Common Stock 05/18/2011   A   1,560,857 (1) A (1) 3,121,714 I See Footnotes (3) (4)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Stock Option (Right to Buy)

$ 7.12

05/18/2011

A

10,000 (5)

05/14/2003(6)

05/14/2012

Common Stock

10,000 (5)

$ 0 (7)

30,000

D

Stock Option (Right to Buy)

$ 4.065

05/18/2011

A

10,000 (5)

08/26/2004(8)

08/26/2013

Common Stock

10,000 (5)

$ 0 (7)

40,000

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
MOORE KEVIN S 333 THREE D SYSTEMS CIRCLE ROCK HILL, SC 29730	X

Signatures

/s/Robert M. Grace, Jr., Attorney-in-Fact		05/19/2011
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	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.
(2)	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.
(3)	These securities are beneficially owned through The Clark Estates, Inc., a New York corporation, of which the Reporting Person is President and a director.
(4)	Above reporting person disclaims beneficial ownership of these securities except to the extent of any pecuniary interest therein.
(5)	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.
(6)	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.
(7)	Granted as compensation for services as director.
(8)	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.

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