UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

x

Rule 13d-1(d)

CUSIP No. 74346Y 103

1.

Names of Reporting Persons.
I.R.S. Identification Nos. of above persons (entities only).

Ronald Woestemeyer and Mariette Woestemeyer

2.

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)

o

(b)

o

3.

SEC Use Only

4.

Citizenship or Place of Organization
United States of America

5.

Sole Voting Power
3,758,243

6.

Shared Voting Power
1,000,000

7.

Sole Dispositive Power
3,758,243

8.

Shared Dispositive Power
1,000,000

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
4,758,243

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
18.5%

12.

Type of Reporting Person (See Instructions)
IN

Item 1.

(a)

Name of Issuer
PROS Holdings, Inc.

(b)

Address of Issuer’s Principal Executive Offices
3100 Main Street, Suite 900, Houston, TX 77002

Item 2.

(a)

Name of Person Filing
Ronald Woestemeyer and Mariette Woestemeyer

(b)

Address of Principal Business Office or, if none, Residence
3100 Main Street, Suite 900, Houston, TX 77002

(c)

Citizenship
United States of America

(d)

Title of Class of Securities
Common Stock, par value $0.001 per share

(e)

CUSIP Number
7436Y 103

Item 3.

If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:

(a)

o

Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

(b)

o

Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

(c)

o

Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).

(d)

o

Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C 80a-8).

(e)

o

An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);

(f)

o

An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);

(g)

o

A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);

(h)

o

A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i)

o

A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j)

o

Group, in accordance with § 240.13d–1(b)(1)(ii)(J).

Item 4.

Ownership.

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

(a)

Amount beneficially owned:   

4,758,243 shares, consisting of (i) 1,604,136 shares held of record by Ronald F. Woestemeyer and Mariette Woestemeyer, (ii) 962,464 shares held of record by Ronald F. Woestemeyer 2007 Annuity Trust, of which Mr. Woestemeyer is the sole trustee, (iii) 641,643 shares held of record by Mariette M. Woestemeyer 2007 Annuity Trust, of which Mrs. Woestemeyer is the sole trustee, (iv) 1,000,000 shares held of record by DB Trust Co. – Woestemeyer 1999 Gift Trust, of which DB Trust Company NA is the sole trustee (v) 520,000 shares held of record by Karoma LLC, of which Mr. and Mrs. Woestemeyer are the sole managers, and (vi) stock options held by Mrs. Woestemeyer to acquire 30,000 shares, which are immediately exercisable.  Mr. Woestemeyer disclaims beneficial ownership of the shares held of record by Mariette M. Woestemeyer 2007 Annuity Trust and Woestemeyer 1999 Gift Trust and the shares issuable upon the exercise of the stock options held by Mrs. Woestemeyer.  Mrs. Woestemeyer disclaims beneficial ownership of the shares held of record by Ronald F. Woestemeyer 2007 Annuity Trust and Woestemeyer 1999 Gift Trust.

(b)

Percent of class:   

18.5%

(c)

Number of shares as to which the person has:

(i)

Sole power to vote or to direct the vote   

3,758,243

(ii)

Shared power to vote or to direct the vote    

1,000,000

(iii)

Sole power to dispose or to direct the disposition of   

3,758,243

(iv)

Shared power to dispose or to direct the disposition of   

1,000,000

Item 5.

Ownership of Five Percent or Less of a Class

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following   o.

Item 6.

Ownership of More than Five Percent on Behalf of Another Person.

Not applicable

Item 7.

Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company

Not applicable

Item 8.

Identification and Classification of Members of the Group

Not applicable

Item 9.

Notice of Dissolution of Group

Not applicable

Item 10.

Certification

Not applicable

February 17, 2008

/s/ Ronald F. Woestemeyer

Ronald F. Woestemeyer

/s/ Mariette M. Woestemeyer

Mariette M. Woestemeyer