6-K

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 August, 2021

Commission File Number: 001-37877

The Bank of N.T. Butterfield & Son Limited

(Translation of registrant’s name into English)

65 Front Street

Hamilton, HM 12

Bermuda

(Address of principal executive offices)

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

Form 20-F ý Form 40-F o

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): o

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): o

DOCUMENTS INCLUDED AS PART OF THIS FORM 6-K

Attached hereto as Exhibit 99.1 is the press release announcing the resolution with the United States Department of Justice ("DOJ") concerning the DOJ's inquiry into Butterfield’s legacy business with US clients that had been publicized in November 2013.

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.

EXHIBIT INDEX

Document

BUTTERFIELD REACHES RESOLUTION WITH US DEPARTMENT OF JUSTICE

Hamilton, Bermuda — August 3, 2021: The Bank of N.T. Butterfield & Son Limited (“Butterfield”) (NYSE: NTB | BSX: NTB.BH) today announced that it has reached a resolution with the United States Department of Justice concerning the inquiry into Butterfield’s legacy business with US clients reported in November 2013.

The resolution is in the form of a non-prosecution agreement ("NPA") with a three-year term. The financial payments totaling $5.6 million in respect of Forfeiture and Tax Restitution Amounts are in line with the existing provision included in Butterfield’s financial statements as recorded in 2015 and 2016.

Michael Collins, Chairman and Chief Executive Officer of Butterfield, said, “We are pleased to resolve this matter which dates back to late 2013. Since that time, we have enhanced our compliance controls for business with US clients and the total payment has been provisioned. Moving forward, we remain focused on delivering for our clients and our stakeholders.”

-ENDS-

About Butterfield:

Butterfield is a full-service bank and wealth manager headquartered in Hamilton, Bermuda, providing services to clients from Bermuda, the Cayman Islands, Guernsey and Jersey, where our principal banking operations are located, and The Bahamas, Switzerland, Singapore and the United Kingdom, where we offer specialized financial services. Banking services comprise deposit, cash management and lending solutions for individual, business and institutional clients. Wealth management services are composed of trust, private banking, asset management and custody. In Bermuda, the Cayman Islands and Guernsey, we offer both banking and wealth management. In The Bahamas, Singapore and Switzerland, we offer select wealth management services. In the UK, we offer residential property lending. In Jersey, we offer select banking and wealth management services. Butterfield is publicly traded on the New York Stock Exchange (symbol: NTB) and the Bermuda Stock Exchange (symbol: NTB.BH). Further details on the Butterfield Group can be obtained from our website at: www.butterfieldgroup.com.

Investor Relations Contact:                Media Relations Contact:

Noah Fields                    Nicky Stevens

Investor Relations                 VP, Group Strategic Marketing & Communications

The Bank of N.T. Butterfield & Son Limited        The Bank of N.T. Butterfield & Son Limited

Phone: (441) 299 3816                Phone: (441) 299 1624

E-mail: noah.fields@butterfieldgroup.com         Cellular: (441) 524 4106

E-mail: nicky.stevens@butterfieldgroup.com