Sec Form 3 Filing - Stern Sadie @ 3D SYSTEMS CORP - 2020-01-01

FORM 3 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 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 Stern Sadie 2. Issuer Name and Ticker or Trading Symbol 3D SYSTEMS CORP [ DDD] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) EVP, Human Resources (Last) (First) (Middle) 333 THREE D SYSTEMS CIRCLE 3. Date of Earliest Transaction (MM/DD/YY) 01/01/2020 (Street) ROCK HILL, SC29730 4. If Amendment, Date Original Filed (MM/DD/YY) 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 9,480 D Common Stock 71,174 ( 1 ) D

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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 Performance Based Restricted Stock ( 2 ) ( 2 ) ( 2 ) Common Stock 8,000 ( 2 ) D Performance Based Restricted Stock ( 3 ) ( 3 ) ( 3 ) Common Stock 8,000 ( 3 ) D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Stern Sadie 333 THREE D SYSTEMS CIRCLE ROCK HILL, SC29730 EVP, Human Resources Signatures Andrew M. Johnson, Attorney-in-Fact, for Sadie Stern 01/09/2020 Signature of Reporting Person Date

Explanation of Responses:

( 1 )This amount includes 71,174 shares of restricted stock ("RSAs") issued pursuant to the Issuer's 2015 Incentive Plan. Of these shares, 6,668 RSAs vest on October 23, 2020; 5,700 RSAs vest on August 15, 2020; 2,352 RSAs vest on March 1, 2020; 2,351 RSAs vest on March 1, 2021; 6,092 RSAs vest on February 15, 2020; 6,092 RSAs vest on February 15, 2021; 6,091 RSAs vest on February 15, 2022; 2,028 RSAs vest on June 13, 2020; 2,028 RSAs vest on June 13, 2021; 2,027 RSAs vest on June 13, 2022; 14,872 RSAs vest on December 13, 2020; 7,437 RSAs vest on December 13, 2021; and 7,436 RSAs vest on December 13, 2022. ( 2 )The Reporting Person has been awarded 8,000 shares of RSAs under the Issuer's 2015 Incentive Plan. These RSAs vest, if at all, on the later date that is six months after the date of grant and the date that the closing price of a share of the common stock on each trading day during the immediately prior ninety consecutive calendar days is at least $30. ( 3 )he Reporting Person has been awarded 8,000 shares of RSAs under the Issuer's 2015 Incentive Plan. These RSAs vest, if at all, on the later date that is six months after the date of grant and the date that the closing price of a share of the common stock on each trading day during the immediately prior ninety consecutive calendar days is at least $40.

Remarks: Exhibit 24 - Power of Attorney

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