Filing Details

Item 1(a).

Name of Issuer:

Post Holdings, Inc. (the "Issuer")

Item 1(b).

Address of Issuer's Principal Executive Offices:

2503 S. Hanley Road
St. Louis, Missouri 63144

Item 2(a).

Name of Persons Filing:

The names of the persons filing this statement on Schedule 13G are Tourbillon Capital Partners LP ("Tourbillon Capital Partners") and Jason H. Karp (together, the "Reporting Persons"). Mr. Karp is the Chief Executive Officer of Tourbillon Capital Partners.

Item 2(b).

Address of Principal Business Office or, if None, Residence:

The address of the principal business office of each of the Reporting Persons is 888 Seventh Avenue, 32^nd Floor, New York, NY 10019.

Item 2(c).

Citizenship:

Tourbillon Capital Partners is a Delaware limited partnership. Mr. Karp is a citizen of the United States of America.

Item 2(d).

Title of Class of Securities:

Common Stock, $.01 par value (the "Common Stock")

Item 2(e).

CUSIP Number:

737446 10 4

Item 3.

If This Statement is Filed Pursuant to Rule 13d 1(b), or 13d-2(b) or (c), Check Whether the Person Filing is a:

Item 4.

Ownership.

Provide the following information regarding the aggregate number and percentage of the class of securities of the Issuer.

(a)

Amount beneficially owned:

As of the close of business on December 31, 2017, the Reporting Persons may be deemed to have  beneficially owned 125,185 shares of Common Stock.

(b)

Percent of class:

The aggregate percentage of Common Stock reported owned by each person named herein is based upon 65,576,238 shares of Common Stock outstanding as of January 31, 2018 which is the total number of shares of Common Stock outstanding as reported in the Issuer's quarterly report on Form 10-Q filed with the Securities and Exchange Commission on February 2, 2018. As of the close of business on December 31, 2017 the Reporting Persons may be deemed to have beneficially owned less than 1% of the shares of Common Stock outstanding.

(c)

Number of shares as to which such person has:

(i)

Sole power to vote or to direct the vote:

See Cover Pages Items 5-9.

(ii)

Shared power to vote or to direct the vote

See Cover Pages Items 5-9.

(iii)

Sole power to dispose or to direct the disposition of

See Cover Pages Items 5-9.

(iv)

Shared power to dispose or to direct the disposition of

See Cover Pages Items 5-9.

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 Persons have ceased to be the beneficial owner of more than five percent of the class of securities, check the following [X].

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.

See Exhibit A to the Schedule 13G filed with the Securities and Exchange Commission on February 16, 2016.

Item 9.

Notice of Dissolution of Group.

Not applicable.

Item 10.

Certification.

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

SIGNATURES

After reasonable inquiry and to the best of its knowledge and belief, each of the undersigned certifies that the information with respect to it set forth in this statement is true, complete, and correct.

Dated:

February 14, 2018

TOURBILLON CAPITAL PARTNERS LP

By:  /s/ Brian A. Kessler

       Brian A. Kessler,

       Chief Financial Officer

Jason H. Karp