BITGO HOLDINGS, INC.

Appointment of Chief Accounting Officer

On November 6, 2026, the Board of Directors of the Company appointed Ali Vapra as Chief Accounting Officer of the Company, effective October 20, 2026. In this role, Mr. Vapra will serve as the Company’s principal financial officer and principal accounting officer. Prior to joining us, Mr. Vapra spent nearly two decades at KPMG, most recently as a Managing Director in the audit and assurance practice of KPMG LLP, which included a rotation in KPMG’s national office. Over the course of his career at KPMG, he also worked in the United Arab Emirates and Pakistan. Mr. Vapra earned a bachelor’s degree in accounting and finance from the University of Karachi and is a certified public accountant licensed in the Commonwealth of Virginia and a member of the Association of Chartered Certified Accountants and the Institute of Chartered Accountants of Pakistan.

There are no arrangements or understandings between Mr. Vapra and any other person pursuant to which he was selected as an officer, no family relationships between Mr. Vapra and any director or executive officer of the Company, and no transactions in which Mr. Vapra has an interest requiring disclosure under Item 404(a) of Regulation S-K.

Rule 10b5-1 Trading Plans

During the three months ended September 30, 2026, none of our directors or officers (as defined in Rule 16a-1(f) under the Exchange Act)adopted, modified orterminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as those terms are defined in Item 408 of Regulation S-K promulgated under the Securities Act.

In our Quarterly Report on Form 10-Q for the quarter ended June 30, 2026, which we filed with the SEC on August 12, 2026, we inadvertently omitted disclosure regarding the adoption of a Rule 10b5-1 trading arrangement (as defined in Item 408 of Regulation S-K) by Chen Fang, our Chief Revenue Officer, on May 29, 2026. Mr. Fang’s plan isintended to satisfy the affirmative defense of Rule 10b5-1(c) under the Exchange Act and provides for the potential sale of up to 270,400 shares of our Class A common stock, subject to certain price limits, until August 31, 2027, or earlier if all transactions under the plan are completed.