UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of March 2026

Commission File Number 001-36202

NAVIGATOR HOLDINGS LTD.

(Exact name of Registrant as specified in its Charter)

c/o NGT Services UK Ltd

10 Bressenden Place

London, SW1E 5DH

United Kingdom

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.  Form 20-F ☒ Form 40-F ☐

ITEM 1—INFORMATION CONTAINED IN THIS FORM 6-K REPORT

On March 20, 2026, Navigator Holdings Ltd. (the “Company”) announced the upsize and pricing of the previously announced public offering of a total of 8,000,000 shares of the Company’s common stock by BW Group Limited, as the selling shareholder of the Company.

Attached to this Report on Form 6-K as Exhibit 99.1 is a copy of the Company’s press release, titled “Navigator Gas Announces Pricing of Upsized Secondary Public Offering by Selling Shareholder and Concurrent Repurchase of Shares by Navigator Gas”, dated March 20, 2026.

ITEM 2—EXHIBITS

The following exhibit is attached to this Report on Form 6-K:

SIGNATURE

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, thereunto duly authorized.