UnitedGlobalCom, Inc. Class C Common Stock Certificate and Transfer Restrictions

Summary

This document certifies ownership of Class C Common Stock in UnitedGlobalCom, Inc., a Delaware corporation. The shares are fully paid, non-assessable, and can only be transferred on the company's books by the holder or an authorized attorney upon proper endorsement and surrender of the certificate. The shares are restricted securities under the Securities Act of 1933 and may only be transferred if registered or exempt from registration. Additionally, the shares are subject to a Stockholders Agreement and a Standstill Agreement, both dated January 30, 2002, which impose further transfer restrictions.

EX-4.3 5 a2074362zex-4_3.htm EXHIBIT 4.3
QuickLinks -- Click here to rapidly navigate through this document

EXHIBIT 4.3

SEE RESTRICTIVE LEGEND ON REVERSE SIDE HEREOF

	A Delaware Corporation

NUMBER **		SHARES **

	UNITEDGLOBALCOM, INC. CLASS C COMMON STOCK Shares are with $.01 par value

This Certifies that is the owner of Shares of the Capital Stock of

UnitedGlobalCom, Inc.

Fully Paid and Non-Assessable

transferable only on the books of the Corporation by the holder hereof in person or by Attorney upon surrender of this Certificate properly endorsed.

In Witness Whereof, the said Corporation has caused this Certificate to be signed by its duly authorized officers and its Corporate Seal to be hereunto affixed this day of A.D.

Senior Vice President

Assistant Secretary

THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 (THE "ACT") AND ARE "RESTRICTED SECURITIES" AS THAT TERM IS DEFINED IN RULE 144 UNDER THE ACT. THE SHARES MAY NOT BE OFFERED FOR SALE, SOLD OR OTHERWISE TRANSFERRED EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE ACT OR PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE ACT, THE AVAILABILITY OF WHICH IS TO BE ESTABLISHED TO THE SATISFACTION OF THE COMPANY.

THE SECURITIES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO A STOCKHOLDERS AGREEMENT AND A STANDSTILL AGREEMENT, EACH DATED AS OF JANUARY 30, 2002, COPIES OF WHICH ARE AVAILABLE FROM UNITEDGLOBALCOM, INC. UPON REQUEST, AND ANY SALE, PLEDGE, HYPOTHECATION, TRANSFER, ASSIGNMENT OR OTHER DISPOSITION OF SUCH SECURITIES IS SUBJECT TO SUCH STOCKHOLDERS AGREEMENT AND STANDSTILL AGREEMENT.

CERTIFICATE

FOR

SHARES

CAPITAL STOCK

ISSUED TO

DATED

For Value Received, hereby sell, assign and transfer

unto

				Shares
of the Capital Stock represented by the within Certificate, and do hereby irrevocably constitute and appoint
				Attorney

to transfer the said Stock on the books of the within named Corporation with full power of substitution in the premises.


Dated ,

In presence of

NOTICE: THE SIGNATURE OF THIS ASSIGNMENT MUST CORRESPOND WITH THE NAME AS WRITTEN UPON THE FACE OF THE CERTIFICATE, IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT, OR ANY CHANGE WHATEVER.

QuickLinks