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
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Lucas Rick		 2. Issuer Name and Ticker or Trading Symbol

ExOne Co [ XONE ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
See Remarks
(Last)          (First)          (Middle)

127 INDUSTRY BOULEVARD		 3. Date of Earliest Transaction (MM/DD/YYYY)

11/1/2021
(Street)

NORTH HUNTINGDON, PA 15642
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
 6. Individual or Joint/Group Filing (Check Applicable Line)

_X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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, par value $0.01 11/1/2021  M(1)  15000 A$18.00 70234 D  
Common Stock, par value $0.01 11/1/2021  M(1)  25000 A$7.91 95234 D  
Common Stock, par value $0.01 11/1/2021  S(2)  40000 D$25.0948 (3)55234 D  
Common Stock, par value $0.01 11/1/2021  S(2)  38496 D$25.0866 (4)16738 D  

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)		2. Conversion or Exercise Price of Derivative Security3. Trans. Date3A. Deemed Execution Date, if any4. Trans. Code
(Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date7. Title and Amount of Securities Underlying Derivative Security
(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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Incentive Stock Option (right to buy) $18.00 11/1/2021  M (1)    15000   (5)2/6/2023 Common Stock 15000 $0.00 0 D  
Stock Option (right to buy) $7.91 11/1/2021  M (1)    25000   (6)8/14/2022 Common Stock 25000 $0.00 0 D  
Explanation of Responses:
(1) The exercise of stock options awarded under The ExOne Company 2013 Equity Incentive Plan reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.
(2) The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.
(3) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.0000 to $25.2800, inclusive. The reporting person undertakes to provide to The ExOne Company, any security holder of The ExOne Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (3) and (4) to this Form 4.
(4) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.0000 to $25.2800, inclusive.
(5) The option vested in three equal installments on February 6, 2014, 2015 and 2016.
(6) The option vested in two equal installments on August 14, 2017 and 2018.

Remarks:
Chief Technology Officer and Vice President of New Markets
Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Lucas Rick
127 INDUSTRY BOULEVARD
NORTH HUNTINGDON, PA 15642

See Remarks
Signatures
/s/ Loretta L. Benec, attorney-in-fact for Rick Lucas11/3/2021
**Signature of Reporting PersonDate
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