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 Andres
2. Issuer Name and Ticker or Trading Symbol

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

__X__ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
President & CEO
(Last)          (First)          (Middle)

3100 MAIN STREET, 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  22500 A$46.70 700407 D  
Common Stock 3/1/2020  F  9057 D$46.70 691350 D  
Common Stock 3/2/2020  M  168000 A$46.70 859350 D  
Common Stock 3/2/2020  F  67620 D$46.70 791730 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     22500   (2) (2)Common Stock 22500.0 $0 154735 (3)D  
Market Stock Units  (4)3/2/2020  M     168000   (5) (5)Common Stock 168000.0 $0 385592 (6)D  

Explanation of Responses:
(1) Each restricted stock unit ("RSU") vesting represents the continent right to receive one share of PROS Holdings, Inc. common stock.
(2) This is the final tranche of a RSU grant awarded on March 24, 2016 in the amount of 90,000 units, which vested annually in equal installments over a four-year period on March 1st of each year, with the final lapse date of March 1, 2020.
(3) Includes (i) 21,000 unvested RSUs awarded on January 20, 2017 - the award vests in four equal annual installments which began on January 1, 2018, with a final lapse date of January 1, 2021; (ii) 41,474 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) 52,761 unvested RSUs granted 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) 39,500 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.
(4) Each market stock unit ("MSU") finally awarded represents the contingent right to receive one share of PROS Holdings, Inc. common stock.
(5) Represents the MSUs granted on January 20, 2017. The number of shares awarded reflects a 200% achievement level earned.
(6) All performance grants are shown at the maximum possible number of shares which may be earned at 200% of target award, and include: (i) 165,896 MSUs - the performance period for these shares will end on December 31, 2020 and will vest on January 10, 2021, associated with a January 12, 2018 grant; (ii) 140,696 performance RSUs - the performance period for these shares will end on December 31, 2021 and will vest on January 15, 2022, associated with a January 15, 2019 grant; and (iii) 79,000 performance RSUs - the performance period for these shares will end on December 31, 2021 and will vest on January 13, 2023, and is associated with a February 7, 2020 grant.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Reiner Andres
3100 MAIN STREET
SUITE 900
HOUSTON, TX 77002
X
President & CEO

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

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