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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): October 30, 2025

Willis Towers Watson Public Limited Company

(Exact name of registrant as specified in its charter)

Ireland |  | 001-16503 |  | 98-0352587
(State or other jurisdiction of incorporation) |  | (Commission File Number) |  | (IRS Employer Identification No.)

c/o Willis Group Limited, 51 Lime Street, London, EC3M 7DQ, England

(Address, including Zip Code, of Principal Executive Offices)

Registrant’s telephone number, including area code: (011) (44)-(20)-3124-6000

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class |  | Trading Symbol(s) |  | Name of each exchange on which registered
Ordinary Shares, nominal value $0.000304635 per share |  | WTW |  | NASDAQ Global Select Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

| Item 2.02 | Results of Operations and Financial Condition.

On October 30, 2025, Willis Towers Watson Public Limited Company (“WTW”) issued a press release announcing its financial results for the period ended September 30, 2025.

A copy of WTW’s press release is attached hereto as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated by reference herein. A reconciliation between certain non-GAAP financial measures and reported financial results is provided as an attachment to the press release.

| Item 7.01 | Regulation FD.

WTW also posted to the investor relations section of its website a slide presentation which it may refer to during its conference call to discuss the results. The slide presentation is attached hereto as Exhibit 99.2 to this Current Report on Form 8-K and is incorporated by reference herein.

The information contained in Item 2.02 and Item 7.01 of this Current Report on Form 8-K (including Exhibits 99.1 and 99.2) is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. Such information shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in any such filing.

| Item 9.01 | Financial Statements and Exhibits.

(d) | Exhibits

The following exhibits are furnished herewith:

Exhibit No. |  | Description
99.1 |  | Press release, dated October 30, 2025, announcing the financial results for the period ended September 30, 2025, for WTW.
99.2 |  | Slide Presentation, supplementing the above press release.
104 |  | Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

| WILLIS TOWERS WATSON PUBLIC LIMITED COMPANY
Date: October 30, 2025 | By: | /s/ Andrew Krasner
| Name: | Andrew Krasner
| Title: | Chief Financial Officer