UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

SCHEDULE 13D

(Rule 13d-101)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(a)

AND

AMENDMENTS THERETO FILED PURSUANT TO 240.13d-2(a)

Under the Securities Exchange Act of 1934

(Amendment No. 1)*

iSoftStone Holdings Limited

(Name of Issuer)

Ordinary Shares, par value $0.0001 per share

(Title of Class of Securities)

46489B108¹

(CUSIP Number)

Mr. Tianwen Liu

Building 16, Dong Qu, 10 Xibeiwang Dong Lu,

Haidian District, Beijing 100193, China

Telephone: +86 10 5874 9000

With a copy to:

Ling Huang, Esq.

Cleary Gottlieb Steen & Hamilton LLP

Twin Towers West (23Fl)

12B Jianguomenwai Avenue

Chaoyang District, Beijing 100022

People’s Republic of China

Telephone: +86 10 5920 1000

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

November 2, 2013

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box  ¨.

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See §240.13d-7 for other parties to whom copies are to be sent.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

Page 3 of 6 Pages

Unless otherwise specified, this amendment No. 1 (this “Amendment No. 1”) amends and supplements the Schedule 13D filed by Tianwen Liu (“Mr. Liu” or the “Reporting Person”) with respect to iSoftStone Holdings Limited (the “Company” or the “Issuer”) with the United States Securities and Exchange Commission (the “SEC”) on July 26, 2013 (the “Original
Schedule 13D”).

The fourth paragraph in (a) – (c) and (f) of Item 2 of the Original Schedule 13D is hereby amended and restated as follows:

As further described in Item 4 below, the Reporting Person may be deemed to (i) be a “group”, within the meaning of
Rule 13d-5(b) promulgated by the SEC under Section 13 of the Securities Exchange Act of 1934, as amended (the “Act”), with CSOF Technology Investments Limited, Accurate Global Limited and Advanced Orient Limited, each a company incorporated under the laws of the British Virgin Islands and controlled by China Everbright Limited (collectively, the “Everbright Entities”), which collectively directly hold 36,731,389 Ordinary Shares of the Issuer, as a result of the Consortium Agreement, the Proposal Letter, the Framework Agreement and the New Proposal Letter; and (ii) beneficially own the 36,731,389 Ordinary Shares held by the Everbright Entities. However, the Reporting Person expressly disclaims beneficial ownership of any Ordinary Shares held by the Everbright Entities, and does not affirm membership in a “group” (within the meaning of Rule 13d-5(b) of the Act) with the Everbright Entities, and this Schedule 13D shall not be construed as acknowledging that the Reporting Person beneficially owns any Ordinary Shares held by the Everbright Entities or any other person or is a member of a group with the Everbright Entities. The Reporting Person is only responsible for the information contained in this Schedule 13D and assumes no responsibility for information contained in any other Schedules 13D filed by the Everbright Entities.

Item 4 of the Original Schedule 13D is hereby amended and supplemented as follows:

On November 2, 2013, Mr. Liu, ChinaAMC Capital Management Limited, a company incorporated under the laws of the Cayman Islands (the “Sponsor”), and the Everbright Entities submitted a binding offer for the Company (the “New Proposal Letter”) to Goldman Sachs (Asia) L.L.C., the financial advisor to the independent committee of the board of directors of the Company (the “Independent Committee”), to acquire all the outstanding Ordinary Shares, including the Ordinary Shares represented by American Depositary Shares (the “ADSs”), of the Company that are not already owned by the Consortium (the “Transaction”), on the following terms and conditions:

Page 4 of 6 Pages

In addition, the Consortium has obtained a highly confident letter (the “Highly Confident Letter”) issued by a reputable bank on October 25, 2013, pursuant to which such bank is highly confident to be able to arrange the Debt Financing, has obtained initial approvals from its credit committees for the Debt Financing and would be able to complete the Debt Financing in a timely and efficient manner.

The description of the New Proposal Letter set forth above in this Item 4 does not purport to be complete and is qualified in its entirety by reference to the full text of the New Proposal Letter, which has been filed as Exhibit 7.05, and is incorporated herein by this reference.

Item 5 of the Original Schedule 13D is amended and restated in its entirety as follows:

The information contained on each of the cover pages of this Amendment No. 1 and the information set forth or incorporated in Items 2, 3, 4, and 6 of the Original Schedule 13D, as amended by this Amendment No. 1, are hereby incorporated herein by reference.

The above disclosure of percentage information is based on a total of 592,610,431 Ordinary Shares, including (i) 576,017,931 Ordinary Shares outstanding as of June 30, 2013 based on the Issuer’s Form 6-K filed with the SEC on August 28, 2013 and (ii) 16,592,500 Ordinary Shares issuable within 60 days after the date hereof upon exercise of certain options of the Issuer held by the Reporting Person.

Page 5 of 6 Pages

Except as described above in this Item 5(c), the Reporting Person has not effected any transactions in the Ordinary Shares of the Issuer during the 60 days preceding the filing of this Amendment No. 1.

Item 6 of the Original Schedule 13D is hereby amended and supplemented as follows:

The information regarding the New Proposal Letter and the Highly Confident Letter under Item 4 is incorporated herein by reference in its entirety.

Item 7 of the Original Schedule 13D is hereby amended and restated as follows:

Page 6 of 6 Pages

SIGNATURE

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

Exhibit 7.05

November 2, 2013

STRICTLY PRIVATE AND CONFIDENTIAL

Goldman Sachs (Asia) L.L.C.

Attention: Dan Swift and Andrew Huang

68/F Cheung Kong Center

2 Queen’s Road Central

Hong Kong, Hong Kong SAR

Dear Messrs. Swift and Huang:

Reference is made to your process letter, dated October 30, 2013, soliciting a non-binding proposal regarding the acquisition by the Consortium (as defined below) of all of the outstanding shares of iSoftStone Holdings Limited (the “Company”) that are not already owned by the Consortium (the “Transaction”).

We began legal and accounting due diligence on the Company on August 20, 2013 and have conducted business due diligence with the management for the past three weeks. During the course of such periods, we have substantially completed our due diligence based on the materials provided by the Company and we would like to express our sincere appreciation to the management, the Independent Committee of the Board of Directors of the Company and its advisors for the time and access with which we have been provided throughout the course of the process. As you are aware, we have committed significant time and resources to the evaluation of the Company, and we believe that we can complete due diligence and execute definitive documentation with respect to the Transaction promptly with the active engagement of the Independent Committee and its advisors. In addition, we would expect to be able to close the Transaction promptly after we complete our due diligence as the only substantive closing conditions would be required regulatory and shareholder approvals.

We are highly committed to complete the Transaction in an expeditious manner and are pleased to submit a binding offer (the “Proposal”) for the Company. This Proposal underscores our continued strong interest in the Company and we look forward to the opportunity to successfully consummate this transaction with the Company.

Set forth below are the key terms of our Proposal.

1. Consortium. The consortium (the “Consortium”) currently consists of the following members (collectively, the “Consortium Members”):

1

As you know, Mr. Tianwen Liu and the Everbright Entities have each agreed to work exclusively with the Sponsor and are interested only in pursuing this Transaction and are not interested in selling their ordinary shares or the American Depositary Shares (“ADSs,” each representing 10 ordinary shares of the Company) in any other transaction involving the Company.

2. Binding Offer Price. Our binding offer price for the Company is US$0.545 in cash per ordinary share or US$5.45 in cash per ADS, in each case other than for the ordinary shares and ADSs beneficially owned by Mr. Tianwen Liu and the Everbright Entities that may be rolled over in connection with the Transaction.

Our binding offer price has been adjusted down from the initial non-binding offer price stated in the preliminary proposal submitted by Mr. Tianwen Liu and the Sponsor to the Board of Directors on June 6, 2013 (the “Announcement”), which was based on publicly available information at that time, due to several factors, including the following:

2

Under our binding offer price, (i) the implied equity value of the Company is US$332.4 million based on a total outstanding number of ordinary shares of 609.9 million, assuming the exercise of all in-the-money options and restricted shares units, excluding any proceeds from such exercise, and (ii) the implied enterprise value of the Company is US$411.9 million, based on the implied equity value plus (1) total debt of US$155.5 million, plus (2) minority interest of US$6.8 million, and minus (3) cash of US$82.8 million, as of June 30, 2013. The implied enterprise value of the Company represents a multiple of 10.1 times the Non-GAAP income from operations of US$40.9 million and the equity value of the Company represents a multiple of 9.9 times the Non-GAAP net income of
US$33.5 million, as reported by the Company for the twelve months ended June 30, 2013.

We believe our Proposal, which represents a premium of 23.6% to the Company’s average closing price for the last 30-trading days prior to the Announcement, provides a very attractive opportunity to the Company’s shareholders to realize superior value and our commitment provides a high degree of comfort regarding the certainty of closing.

3. Transaction Structure. We plan to structure the Transaction as a merger, by which a wholly-owned subsidiary of the holding company that is 100% owned by the Consortium (“Parent”), will merge with and into the Company, making the Company privately held and wholly-owned by Parent. We hereby confirm that we are acting as principal and not as agent in relation to the proposed Transaction.

4. Financing Sources. We intend to finance the Transaction with a combination of equity provided by the Sponsor, rollover equity from Mr. Tianwen Liu, the Everbright Entities and possibly other rollover shareholders, a certain amount of cash of the Company, and debt (the “Debt Financing”) to be arranged by a reputable bank. Pursuant to a highly confident letter issued by such bank on October 25, 2013, such bank is highly confident to be able to arrange the Debt Financing, has obtained initial approvals from its credit committees for the Debt Financing and would be able to complete the Debt Financing in a timely and efficient manner. Please note that our Proposal is not subject to any financing conditions.

5. Management Retention. We plan to retain all senior management members of the Company after closing of the Transaction.

6. Internal Approvals. The signatories of the Proposal are duly authorized representatives of the Consortium. The Consortium has received all internal approvals necessary to submit this Proposal.

7. External Approvals. Other than customary SEC filings and antitrust approvals (if any), we do not expect that the Transaction will be subject to any governmental or regulatory approvals.

8. Due Diligence. Based upon the data access that we have received, we have substantially completed our due diligence. We have requested, and you have agreed to provide, access to certain confirmatory items (including tax due diligence) to be available at the final stage of the process. Our Proposal is subject to the completion of due diligence on such confirmatory items. We are highly confident that we will be able to complete our due diligence on these items expeditiously with your cooperation.

9. Merger Agreement. We have enclosed our proposed merger agreement as attachment 1. This agreement represents the form of merger agreement we would be prepared to execute.

3

10. Binding Offer Expiry Date. The Proposal will be effective until 5:00 p.m. Hong Kong time on November 30, 2013, after which we reserve the right to withdraw the Proposal, of which we would notify you in writing, unless the terms outlined in the Proposal are previously accepted or otherwise agreed. We are highly committed and are confident that the Transaction can be closed on a highly expedited basis as outlined in this letter, and we remain eager to engage with the Independent Committee or its advisors as soon as practicable. This Proposal does not constitute a binding obligation to effect the proposed Transaction, and any such binding obligation will be set forth only in the definitive agreements with respect to the proposed Transaction.

11. Public Disclosure. Mr. Tianwen Liu and Everbright Entities will, as required by law, promptly file an amendment to their respective existing Schedules 13D to disclose this Proposal. We are sure you will agree with us that it is otherwise in all of our interests to ensure that we proceed in a confidential manner, unless otherwise required by law, until we have executed the definitive agreements or terminated our discussions in connection with the proposed Transaction.

Our Proposal is highly attractive and provides full value for the shareholders of the Company. Moreover, our Proposal would deliver this value with great certainty, as we are prepared to move quickly and able to provide a cash transaction without financing contingencies. We look forward to working together with the Independent Committee and its advisors to consummate the Transaction successfully and expeditiously.

Enclosed:

Attachment 1: Merger Agreement

4

5