Santander Holdings USA, Inc.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

For the quarterly period ended March 31, 2026

Commission File Number:001-16581

SANTANDER HOLDINGS USA, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number including area code (800)493-8219

Not applicable

(Former name, former address and former fiscal year, if changed since last report)

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

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☑. No☐.

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation ST (Section 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☑. No☐.

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See definitions of “large accelerated filer,” “accelerated filer,” "smaller reporting company," and “emerging growth company” in Rule 12b-2 of the Exchange Act.

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☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act) Yes☐. No☑.

Number of shares of common stock outstanding at April 30, 2026:530,391,043 shares

INDEX

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

SANTANDER HOLDINGS USA, INC., AND SUBSIDIARIES

This Quarterly Report on Form 10-Q contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Any statements about the Company’s expectations, beliefs, plans, predictions, forecasts, objectives, assumptions, or future events or performance are not historical facts and may be forward-looking. These statements are often, but not always, made through the use of words and phrases such as “may,” “could,” “should,” “will,” “would,” “believes,” “expects,” “anticipates,” “estimates,” “intends,” “plans,” “assumes," "goal," "seeks," "can," "predicts," "potential," "projects," "continuing," "ongoing," and similar expressions.

Although the Company believes that the expectations reflected in these forward-looking statements are reasonable as of the date on which the statements are made, these statements are not guarantees of future performance and involve risks and uncertainties which are subject to change based on various important factors and assumptions, some of which are beyond the Company's control. Among the factors that could cause the Company’s financial performance to differ materially from that suggested by forward-looking statements are:

•the effects of regulation, actions and/or policies of the Federal Reserve, the FDIC, the OCC and the CFPB, and other changes in monetary and fiscal policies and regulations, including policies that affect market interest rates and money supply, as well as the impact of changes in and interpretations of GAAP, the failure to adhere to which could subject SHUSA and/or its subsidiaries to formal or informal regulatory compliance and enforcement actions and result in fines, penalties, restitution and other costs and expenses, changes in our business practice, and reputational harm;

•increased credit risk exposure to the extent our loans are concentrated by loan type, industry segment, borrower type or location of the borrower or collateral, and changes in the credit quality of SHUSA's customers and counterparties;

•adverse economic conditions in the United States and worldwide, including the extent of recessionary conditions in the U.S. and the strength of the U.S. economy in general and regional and local economies in which SHUSA conducts operations in particular, which may affect, among other things, the level of non-performing assets, charge-offs, and credit loss expense;

•inflation, interest rate, market and monetary fluctuations may, among other things, reduce net interest margins and impact funding sources, revenue and expenses, the value of assets and obligations, and the ability to originate anddistribute financial products in the primary and secondary markets;

•the pursuit of trade related policies, including reciprocal tariffs and sanctions among global trade partners and/or other countries, and/or trade disputes generally;

•bank failures and actual or perceived adverse developments at other banks, including financial or operational failures and concerns about creditworthiness or the ability of other banks to fulfill their obligations, may lead to decreased customer and investor sentiment regarding the stability and liquidity of banks in general, reduced interest by customers and investors to use banking services and enter into transactions with banks, disruption in the financial markets, increased expenses for banks such as higher FDIC insurance premiums, and increased regulation of banks by supervisory authorities as they seek to manage or mitigate such adverse developments;

•risks SHUSA faces implementing its growth strategy, including SHUSA's ability to grow revenue, manage expenses, attract and retain highly-skilled people, successfully complete and integrate mergers and acquisitions, and raise capital necessary to achieve its business goals and comply with regulatory requirements; including, without limitation, the proposed acquisition of Webster by Santander and merger of Webster Bank into SBNA

•SHUSA’s ability to effectively manage its capital and liquidity, including non-objection to its capital plans by its regulators and its subsidiaries' ability to continue to pay dividends to it;

•reduction in SHUSA's access to funding or increases in the cost of its funding, such as in connection with changes in credit ratings assigned to SHUSA or its subsidiaries, or a significant reduction in customer deposits;

•adverse movements and volatility in debt and equity capital markets and adverse changes in securities markets, including those related to the financial condition of significant issuers in SHUSA’s investment portfolio;

•the ability to manage risks inherent in our businesses, including through effective use of systems and controls, insurance, derivatives and capital management;

•SHUSA’s ability to timely develop competitive new products and services in a changing environment that are responsive to the needs of SHUSA's customers and are profitable to SHUSA, the success of our marketing efforts to customers, and the potential for new products and services to impose additional unexpected costs, losses, or other liabilities not anticipated at their initiation, and expose SHUSA to increased operational risk;

•competitors of SHUSA who may have greater financial resources or lower costs, or be subject to different regulatory requirements than SHUSA, may innovate more effectively, or may develop products and technology that enable those

competitors to compete more successfully than SHUSA and cause SHUSA to lose business or market share and impact our net income adversely;

•Investments SHUSA makes in non-publicly traded securities of startup and small companies that we may not be able to reduce or exit quickly and that may as a result reduce compensation we receive for such investments in such an event;

•changes in customer spending, investment or savings behavior;

•changing demographic preferences for vehicle type, ownership and use that could affect markets for new and used vehicles

•the ability of SHUSA and its third-party vendors to convert, maintain and upgrade, as necessary, SHUSA’s data processing and other IT infrastructure on a timely and acceptable basis, within projected cost estimates and without significant disruption to our business;

•SHUSA's ability to control operational risks, data security breach risks and outsourcing risks, and the possibility of errors in quantitative models and software SHUSA uses in its business, including as a result of cyberattacks, technological failure, human error, fraud or malice by internal or external parties, and the possibility that SHUSA's controls will prove insufficient, fail or be circumvented;

•changing federal, state, and local tax laws and regulations, which may include tax rates changes, that could materially adversely affect our business, including changes to tax laws and regulations and the outcome of ongoing tax audits by federal, state and local income tax authorities that may require SHUSA to pay additional taxes or recover fewer overpayments compared to what has been accrued or paid as of period-end;

•the costs and effects of regulatory or judicial actions or proceedings, including possible business restrictions resulting from such actions or proceedings;

•adverse publicity or negative public opinion, whether specific to SHUSA or regarding other industry participants or industry-wide factors, or other reputational harm;

•SHUSA’s ability to address social, environmental and sustainability matters that may arise from its activities;

•natural or man-made disasters including pandemics and other significant public health emergencies, effects of climate change, and SHUSA's ability to deal with disruptions caused by such disasters and emergencies;

•local, regional or global geopolitical tensions and hostilities, including acts of terrorism or domestic or foreign military conflicts and escalations of hostilities; and

•the other factors that are described in Part I, Item IA - Risk Factors of the Company's Annual Report on Form 10-K for 2025.

If one or more of the factors affecting the Company’s forward-looking information and statements renders forward-looking information or statements incorrect, the Company’s actual results, performance or achievements could differ materially from those expressed in, or implied by, the forward-looking information and statements. Therefore, the Company cautions the reader not to place undue reliance on any forward-looking information or statements herein. The effect of these factors is difficult to predict. Factors other than these also could adversely affect the Company’s results, and the reader should not consider these factors to be a complete set of all potential risks or uncertainties as new factors emerge from time to time. Management cannot assess the impact of any such factor on the Company’s business or the extent to which any factor, or combination of factors, may cause results to differ materially from those contained in any forward-looking statement. Any forward-looking statements reflect the current beliefs and expectations of the Company's management and only speak as of the date of this document, and the Company undertakes no obligation to update any forward-looking information or statements, whether written or oral, to reflect any change, except as required by law. All forward-looking statements attributable to the Company are expressly qualified by these cautionary statements.

SHUSA provides the following list of abbreviations and acronyms as a tool for the readers that are used in Management’s Discussion and Analysis of Financial Condition and Results of Operations, the Condensed Consolidated Financial Statements and the Notes to the Condensed Consolidated Financial Statements.