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 * GRASBERGER F NICHOLAS III 2. Issuer Name and Ticker or Trading Symbol HARSCO CORP [ HSC ] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable)__X__ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
Chairman, President and CEO
(Last)         (First)         (Middle)
350 POPLAR CHURCH ROAD
3. Date of Earliest Transaction (MM/DD/YYYY)
3/1/2021
(Street)
CAMP HILL, PA 17011
(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  3/2/2021    M    14378  A $0  658381  D   
Common Stock  3/2/2021    F    6252  D $17.02  652129  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 Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. 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 Date 7. 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)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Restricted Stock Units   (1) 3/1/2021    A     44591       (1)  (1) Common Stock  44591.0  $0  176115  D   
Performance Share Units   (2) 3/1/2021    A     89182       (2) 12/31/2023  Common Stock  89182.0  $0  263618  D   
Stock Appreciation Rights  $18.58  3/1/2021    A     79056       (3) 3/1/2031  Common Stock  79056.0  $0  79056  D   
Restricted Stock Units   (1) 3/2/2021    M        14378    (4)  (4) Common Stock  14378.0  $0  161737  D   

Explanation of Responses:
(1)  Restricted stock units granted under the 2013 Equity and Incentive Compensation Plan represent a contingent right to receive Harsco common stock on a one-for-one basis when the restricted stock units vest. The restricted stock units vest in one-third increments on each of the first three anniversaries of the date of the grant.
(2)  Each performance share unit represents a contingent right to receive the equivalent of one share of Harsco common stock. The performance share units vest based on the total shareholder return of Harsco common stock relative to the S&P 600 Industrial Index. The performance share units vest on 12/31/2023.
(3)  The stock appreciation rights vest in one-third increments on each of the first three anniversaries of the date of grant.
(4)  On March 2, 2018 the reporting person was granted 43,134 restricted stock units of which one-third vested on the third anniversary of the grant date.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
GRASBERGER F NICHOLAS III
350 POPLAR CHURCH ROAD
CAMP HILL, PA 17011
X
Chairman, President and CEO

Signatures
/s/F. Nicholas Grasberger III 3/3/2021
**Signature of Reporting Person Date