Initial Statement of Beneficial Ownership (3)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response... 0.5
	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 Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount 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
	Director	10% Owner	Officer	Other
SOSIN CLIFFORD C/O CAS INVESTMENT PARTNERS, LLC 135 E 57TH STREET, SUITE 18-108 NEW YORK, NY 10022		X

Signatures
/s/ Clifford Sosin		3/17/2020
**Signature of Reporting Person		Date