MongoDB, Inc.

Item 5.03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year. On June 30, 2026, MongoDB, Inc. (the “Company”) held its Annual Meeting of Stockholders (the “Annual Meeting”), at which stockholders approved amendments to the Company's Amended and Restated Certificate of Incorporation (the "Existing Charter") to eliminate supermajority vote requirements (the "Supermajority Removal Amendment"). A summary of the Supermajority Removal Amendment was included in Proposal 4 in the Company's definitive proxy statement filed with the Securities and Exchange Commission (the "SEC") on May 19, 2026 and the supplement to the definitive proxy statement, filed with the SEC on June 1, 2026 (together, the "Proxy Statement"), which summary is incorporated herein by reference and is qualified in its entirety by reference to the full text of the new Twelfth Amended and Restated Certificate of Incorporation filed herewith as Exhibit 3.1 (the "Amended and Restated Charter"). The Amended and Restated Charter of the Company was filed with the Secretary of State of the State of Delaware on July 1, 2026 and became effective on July 1, 2026.

Item 5.07 Submission of Matters to a Vote of Security Holders. On June 30, 2026, the Company held its Annual Meeting. At the Annual Meeting, the Company’s stockholders voted on the four proposals set forth below. A more detailed description of each proposal is set forth in the Company’s Proxy Statement. Proposal 1 - Election of Directors. Each of Archana Agrawal, Hope Cochran and Dwight Merriman was elected to serve as a Class III director of the Company’s Board of Directors until the 2029 Annual Meeting of Stockholders and until his or her successor has been duly elected, or if sooner, until the director’s death, resignation or removal, by the following votes: Nominee Votes For Votes Withheld Broker Non-Votes ───────────────────────────────────────────────────────────────────────────── Archana Agrawal 46,240,992 12,616,760 9,262,190 Hope Cochran 42,656,764 16,200,988 9,262,190 Dwight Merriman 47,316,152 11,541,600 9,262,190 Proposal 2 - Approval, on a non-binding advisory basis, of the compensation of the Company’s named executive officers. The stockholders approved, on a non-binding advisory basis, the compensation of the Company’s named executive officers, by the following votes: Votes For Votes Against Abstentions Broker Non-Votes ──────────────────────────────────────────────────────────────────────── 52,364,797 6,338,858 154,097 9,262,190 Proposal 3 - Ratification of the selection of Independent Registered Public Accounting Firm. The stockholders ratified the selection of PricewaterhouseCoopers LLP as the Company’s independent registered public accounting firm for the Company’s fiscal year ending January 31, 2027, by the following votes: Votes For Votes Against Abstentions Broker Non-Votes ──────────────────────────────────────────────────────────────────────── 65,331,456 2,754,179 34,307 — Proposal 4 - Approval of an amendment to the Company's Existing Charter to eliminate supermajority vote requirements. The stockholders approved an amendment to the Company’s Existing Charter to eliminate supermajority vote requirements, by the following votes: Votes For Votes Against Abstentions Broker Non-Votes ──────────────────────────────────────────────────────────────────────── 58,762,935 68,287 26,530 9,262,190