Company: TSI
Filing Date: 2025-08-08
Form Type: N-2
Source: 0001193125-25-177098
Chunk: 135

Company: TCW STRATEGIC INCOME FUND INC
Filing Date: 2025-08-08
Form: N-2
Chunk 135
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 to the copy of such contract or other document filed as an exhibit to the registration statement of which this Prospectus forms a part, each such statement being qualified in all respects by such reference. To the
extent they would be material to an investor’s decision to invest in the offer, the terms of any such contract or other document are described in the Prospectus or will be described in the Prospectus Supplement thereto.

68

TABLE OF CONTENTS OF THE FUND’S STATEMENT OF ADDITIONAL INFORMATION

|                                                 |     | Page |     |
| The Fund                                        |     |      |   2 |
| Investment Objective and Policies               |     |      |   2 |
| Investment Restrictions                         |     |      |  28 |
| Management of the Fund                          |     |      |  29 |
| Portfolio Transactions and Brokerage Allocation |     |      |  43 |
| Descriptions of Common Stock                    |     |      |  45 |
| Repurchase of Common Stock                      |     |      |  46 |
| Tax Matters                                     |     |      |  46 |
| Proxy Voting Policy and Proxy Voting Record     |     |      |  53 |
| Financial Statements                            |     |      |  56 |
| Legal Counsel                                   |     |      |  56 |
| Additional Information                          |     |      |  56 |
| Appendix A—Description of S&P and Moody’s       
 Ratings                                         |     |      | A-1 |
| Appendix B—Proxy Voting Policy and Procedures   |     |      | B-1 |

69

The information in this statement of additional information is not complete and may be changed. The Fund may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

Subject to Completion Dated August 8, 2025

TCW Strategic Income Fund, Inc.

Statement of Additional Information

TCW Strategic Income Fund, Inc. (the “Fund”) is a diversified, closed-end management
investment company registered under the Investment Company Act of 1940, as amended (the “1940 Act”). The Fund’s investment objective is to seek a total return comprised of current income and capital appreciation.

This Statement of Additional Information (the “SAI”) relating to shares of common stock of the Fund (“Common Stock