Ownership Submission
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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(Print or Type Responses)
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)

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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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