FORM 3
        
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF 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 *

SOSIN CLIFFORD
2. Date of Event Requiring Statement (MM/DD/YYYY)
3/16/2020 

3. Issuer Name and Ticker or Trading Symbol

Party City Holdco Inc. [PRTY]
(Last)        (First)        (Middle)

C/O CAS INVESTMENT PARTNERS, LLC, 135 E 57TH STREET, SUITE 18-108
4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                          ___X___ 10% Owner
_____ Officer (give title below)        _____ Other (specify below)
(Street)

NEW YORK, NY 10022      

(City)              (State)              (Zip)
5. 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 Beneficially Owned
1.Title of Security
(Instr. 4)
2. Amount of Securities Beneficially Owned
(Instr. 4)
3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)
4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 10022244 I See footnote (1)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 4)
2. Date Exercisable and Expiration Date
(MM/DD/YYYY)
3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)
4. Conversion or Exercise Price of Derivative Security5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)
6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date ExercisableExpiration DateTitleAmount or Number of Shares

Explanation of Responses:
(1) 6,844,804 of these shares are owned directly by Sosin Partners, L.P., and Reporting Person is the Managing Member of CAS Investment Partners, LLC, which is investment manager to Sosin Partners, L.P. The remaining 3,177,440 shares are owned directly by CSWR Partners, L.P., and Reporting Person is the Managing Member of CAS Investment Partners, LLC, which is investment manager to CSWR Partners, L.P.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
SOSIN CLIFFORD
C/O CAS INVESTMENT PARTNERS, LLC
135 E 57TH STREET, SUITE 18-108
NEW YORK, NY 10022

X


Signatures
/s/ Clifford Sosin3/17/2020
**Signature of Reporting PersonDate

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