UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE TO

Tender Offer Statement under Section 14(d)(1) or 13(e)(1)
of the Securities Exchange Act of 1934

(Amendment No. 4)

STATS ChipPAC Ltd.

(Name of Subject Company (issuer))

Singapore Technologies Semiconductors Pte Ltd

a wholly-owned subsidiary of

Temasek Holdings (Private) Limited

(Names of Filing Persons (Offerors))

Ordinary Shares, including Ordinary Shares represented by
American Depositary Shares (each representing ten Ordinary Shares)

(Title of Class of Securities)

CUSIP No. 85227G102

(CUSIP Number of Class of Securities)

Lena Chia, Managing Director
Legal & Regulations
Temasek Holdings (Private) Limited
60B Orchard Road
#06-18 Tower 2
The Atrium@Orchard
238891
Singapore
Telephone: (65) 6890-7188

(Name, address, and telephone numbers of person authorized
to receive notices and communications on behalf of filing persons)

COPY TO:

David W. Hirsch
Cleary Gottlieb Steen & Hamilton LLP
One Garden Road
Bank of China Tower
Hong Kong
Telephone: (852) 2532-3731

Calculation of Filing Fee

Transaction valuation*
$1,494,980,186.70 Amount of filing fee**
$45,895.89

*Estimated for purposes of calculating the amount of filing fee only. The calculation assumes the purchase of all outstanding ordinary shares of STATS ChipPAC Ltd., a company organized under the laws of Singapore, other than the shares owned by the Offerors, at a purchase price of S$1.75 per share, net to the seller in cash. As of March 9, 2007, there were 2,016,277,910 ordinary shares outstanding, of which 712,228,050 shares are owned by the Offerors. As a result, this calculation assumes the purchase of 1,304,049,860 shares. The transaction valuation of S$2,282,087,255.00 has been translated at US$1.00=S$1.5265, the Bloomberg composite U.S. dollar to Singapore dollar exchange rate at the close of the New York market on March 12, 2007.

**The amount of filing fee, calculated in accordance with Rule 240.0-11 of the Securities Exchange Act of 1934, as amended, and Fee Rate Advisory No. 6 for fiscal year 2007, equals $30.70 per $1,000,000 of the transaction value, or $45,895.89.

þ Check the box if any part of the fee is offset as provided by Rule 0-11(a)(2) and identify the filing with which the offsetting fee was previously paid. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.

Amount Previously Paid:	$45,895.89
Form or Registration No.:	Schedule TO-T
Filing Party:	Singapore Technologies Semiconductors Pte Ltd
Date Filed:	March 16, 2007

o Check the box if the filing relates solely to preliminary communications made before the commencement of a tender offer.

Check the appropriate boxes below to designate any transactions to which the statement relates:

X third-party tender offer subject to Rule 14d-1.

o issuer tender offer subject to Rule 13e-4.

X going-private transaction subject to Rule 13e-3.

o amendment to Schedule 13D under Rule 13d-2.

SEC2559 (6-05) Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

Check the following box if the filing is a final amendment reporting the results of the tender offer: o

TABLE OF CONTENTS

EX-(a)(1)(xviii) Direct Mailer and Advertisement, distributed to shareholders on April 2, 2007 and published in Singapore newspapers on April 3, 4 and 5, 2007

EX-(a)(1)(xix) Press Release, dated April 3, 2007

EX-(g)(4) Additional questions and answers for STATS ChipPAC securityholder helpline, dated April 2, 2007

EX-(g)(5) Call script for shareholders, dated April 2, 2007

     This Amendment No. 4 amends and supplements the Tender Offer Statement and Rule 13E-3 Transaction Statement filed under cover of Schedule TO (this “Schedule TO”) with the Securities and Exchange Commission (“SEC”) on March 16, 2007 by Singapore Technologies Semiconductors Pte Ltd (“STSPL”), a company incorporated under the laws of Singapore and a wholly-owned subsidiary of Temasek Holdings (Private) Limited, a company incorporated under the laws of Singapore (“Temasek”), and by Temasek. This Schedule TO relates to the offer by STSPL to purchase all outstanding ordinary shares (“Ordinary Shares”) (including Ordinary Shares represented by American Depositary Shares) of STATS ChipPAC Ltd., a company organized under the laws of Singapore (the “Company”), not owned by Temasek or STSPL, upon the terms and subject to the conditions set forth in the Offer to Purchase, dated March 16, 2007 (the “Offer to Purchase”), and the related Form of Acceptance and Authorisation, Form of Acceptance and Transfer and Letter of Transmittal (which, as amended or supplemented from time to time, together constitute the “Offer”).

Item 11. Additional Information.

     On April 4, 2007, Singapore counsel to Fore Research & Management (“Fore”), a holder of US$43.6 million principal amount of the Convertible Subordinated Notes due 2008, sent a letter to the SIC stating that the recommendation of the Company with respect to the Offer for the Convertible Notes, and the price offered for the Convertible Notes, falls short of certain recommendations of the Singapore Code. The letter states that (1) the decision of the independent directors of the Company to take a neutral position on the Offer for the Convertible Notes does not satisfy the requirements under the Singapore Code that the independent directors of the Company give a firm recommendation and spell out the arguments for the acceptance or rejection of the Offer for the Convertible Notes and (2) the “see-through” price offered for the Convertible Notes is not an appropriate price, as required by the Singapore Code, because it does not take into account accrued or future interest on the Convertible Notes and the equity option premium of the Convertible Notes. Singapore counsel to Fore requested that the SIC provide guidance and intervention in investigating these claims and to take appropriate action as the SIC deemed fit, including by possibly requesting action on the part of the Independent Committee of independent directors of the Company. On April 6, 2006, Singapore counsel to STSPL sent a letter to Singapore counsel to Fore explaining why the “see-through” price is an appropriate price for the Offer for the Convertible Notes.

Item 12. Exhibits.

(a)(1)(xviii)	Direct Mailer and Advertisement, distributed to shareholders on April 2, 2007 and published in Singapore newspapers on April 3, 4 and 5, 2007
(a)(1)(xix)	Press Release, dated April 3, 2007
(g)(4)	Additional questions and answers for STATS ChipPAC securityholder helpline, dated April 2, 2007
(g)(5)	Call script for shareholders, dated April 2, 2007

SIGNATURES

After due inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Dated: April 6, 2007

SINGAPORE TECHNOLOGIES SEMICONDUCTORS PTE LTD
By:	/s/ Lena Chia Yue Joo
	Lena Chia Yue Joo
	Director
TEMASEK HOLDINGS (PRIVATE) LIMITED
By:	/s/ Lena Chia Yue Joo
	Lena Chia Yue Joo
	Managing Director Legal & Regulations

EXHIBIT INDEX

EXHIBIT NUMBER DESCRIPTION

(a)(1)(xviii)	Direct Mailer and Advertisement, distributed to shareholders on April 2, 2007 and published in Singapore newspapers on April 3, 4 and 5, 2007
(a)(1)(xix)	Press Release, dated April 3, 2007
(g)(4)	Additional questions and answers for STATS ChipPAC securityholder helpline, dated April 2, 2007
(g)(5)	Call script for shareholders, dated April 2, 2007