Ownership Submission
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

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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(Print or Type Responses)
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 (Month/Day/Year)
03/01/2019
(Street)

HOUSTON, TX 77002		 4. If Amendment, Date Original Filed(Month/Day/Year)
 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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 03/01/2019   M   22,500 A $ 43.05 486,106 D  
Common Stock 03/01/2019   F   8,854 D $ 43.05 477,252 D  

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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 (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 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
(Month/Day/Year)		 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
Restricted Stock Units (1) 03/01/2019   M     22,500   (2)   (2) Common Stock 22,500 $ 0 197,059 (3) D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Reiner Andres
3100 MAIN STREET
SUITE 900
HOUSTON, TX 77002		   X     President & CEO  

Signatures

 Damian Olthoff, attorney-in-fact for Andres D. Reiner   03/05/2019
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Each restricted stock unit represents the contingent right to receive one share of PROS Holdings, Inc. common stock.
(2) This is the third tranche of a restricted stock unit grant awarded on March 24, 2016 in the amount of 90,000 units, and vests annually in equal installments over a four year period on March 1st of each year,with a final lapse date of March 1, 2020.
(3) Includes: (i) 22,500 unvested restricted stock units with a final lapse date of March 1, 2020, and is associated with a March 24, 2016 grant; (ii) 42,000 unvested restricted stock units which vest in equal installments on January 1 for the next two years, with a final lapse date of January 1, 2021, and is associated with a January 20, 2017 grant; (iii) 62,211 unvested restricted stock units which vest in equal installments on January 10 for the next three years, with a final lapse date of January 10, 2022 and is associated with a January 8, 2018 grant; and (iv) 70,348 unvested restricted stock units which vest in equal installments on January 15 for the next four years, with a final lapse date of January 15, 2023, and is associated with a January 15, 2019 grant.

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