Company: KBSR
Filing Date: 2025-04-28
Form Type: DEF 14A
Source: 0001482430-25-000025
Chunk: 0

Company: KBS Real Estate Investment Trust III, Inc.
Filing Date: 2025-04-28
Form: DEF 14A
Chunk 0
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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### WASHINGTON, DC 20549

#### SCHEDULE 14A
<div align='center'>(RULE 14a-101)</div>

### INFORMATION REQUIRED IN PROXY STATEMENT

#### SCHEDULE 14A INFORMATION

#### Proxy Statement Pursuant to Section 14(a) of the

#### Securities Exchange Act of 1934
Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐ Preliminary Proxy Statement

☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

☒ Definitive Proxy Statement

☐ Definitive Additional Materials

☐ Soliciting Material Pursuant to § 240.14a-12

#### KBS REAL ESTATE INVESTMENT TRUST III, INC.
<div align='center'>(Name of Registrant as Specified in its Charter)</div>

Payment of Filing Fee (Check the appropriate box):

☒ No fee required.

☐ Fee paid previously with preliminary materials.

☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

800 Newport Center Drive, Suite 700

Newport Beach, California 92660

#### Proxy Statement and

#### Notice of Annual Meeting of Stockholders

#### To Be Held

#### Wednesday, July 23, 2025

### SOLICITATION OF PROXIES BY THE BOARD OF DIRECTORS
Dear Stockholder:

On Wednesday , July 23, 2025 , KBS Real Estate Investment Trust III, Inc. (“we,” “us” or the “Company”) will hold our annual meeting of stockholders at the offices of KBS, 800 Newport Center Drive, 7th Floor Boardroom, Newport Beach, California 92660. The annual meeting will begi n at 9:00 a.m. Pacifi c time. Directions to the annual meeting can be obtained by calling (866) 527-4264.

We are holding the annual meeting of stockholders for the following purposes:

1. To elect five directors to hold office for one-year terms.

The Board of Directors recommends a vote FOR each nominee.

2. To ratify the appointment of Ernst & Young LLP as our independent registered public accounting firm for the year ending December 31, 2025