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 *

Reiner Roberto D
2. Issuer Name and Ticker or Trading Symbol

PROS Holdings, Inc. [ PRO ]
5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
EVP, Chief Technology Officer
(Last)          (First)          (Middle)

3100 MAIN ST., SUITE 900
3. Date of Earliest Transaction (MM/DD/YYYY)

3/1/2020
(Street)

HOUSTON, TX 77002
(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 3/1/2020  M  30000 A$46.70 92218 D  
Common Stock 3/1/2020  F  12075 D$46.70 80143 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
Restricted Stock Units  (1)3/1/2020  M     30000   (2) (2)Common Stock 30000.0 $0 100479 (3)D  

Explanation of Responses:
(1) Each restricted stock unit represents the contingent right to receive one share of PROS Holdings, Inc. common stock.
(2) This is the last tranche of a restricted stock unit ("RSU") grant awarded on March 24, 2016 in the amount of 120,000 units, which vested in four equal annual installments on March 1st of each year, and had a final lapse date of March 1, 2020.
(3) Includes: (i) 16,325 unvested RSUs awarded on January 20, 2017 - the award vests in four equal annual installments which began January 1, 2018, with a final lapse date of January 1, 2021; (ii) 27,006 unvested RSUs awarded on January 8, 2018 - the award vests in four equal annual installments which began on January 10, 2019, with a final lapse date of January 10, 2022; (iii) 40,848 unvested RSUs awarded on January 15, 2019 - the award vests in four equal annual installments which began on January 15, 2020, with a final lapse date of January 15, 2023; and (iv) 16,300 unvested RSUs awarded on January 13, 2020 - the award will vest in four equal annual installments beginning January 13, 2021, with a final lapse date of January 13, 2024.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Reiner Roberto D
3100 MAIN ST., SUITE 900
HOUSTON, TX 77002


EVP, Chief Technology Officer

Signatures
Damian W. Olthoff, attorney-in-fact for Roberto D. Reiner3/3/2020
**Signature of Reporting PersonDate

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