The filing describes an amendment to the equity incentive plan, not a management change.

Other Events. On June 16, 2026, Myseum.AI, Inc. (the “Company”) issued a press release announcing the signing of a non-binding letter of intent with Scanon.ai Systems, Inc. (“Scanon”) to explore a collaborative development partnership focused on co-developing and integrating Scanon’s current privacy-first artificial intelligence and computer vision capabilities into the Company’s flagship Picture Party platform. A copy of the press release is furnished as Exhibit 99.1 to this Current Report o…

Other Events. On April 17, 2026, the Company issued a press release announcing that it has been accepted into the AMD AI Developer Program by Advanced Micro Devices. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K. On April 23, 2026, the Company filed Amendment No. 1 to the prospectus supplement dated February 6, 2026 and filed with the Securities and Exchange Commission on February 6, 2026 for an additional $2,754,500 of shares of the Company’s com…

Chief Technology Officer — Peter Shelus: Salary increase for Chief Technology Officer, Peter Shelus.

Entry into a Material Definitive Agreement. On February 6, 2026, DatChat, Inc. (“we,” “us,” the “Company” or “MYSE”) entered into a First Amendment to Sales Agreement (the “First Amendment”) with The Benchmark Company, LLC (“Benchmark”), which First Amendment amends that certain Sales Agreement dated February 10, 2025 between the Company and Benchmark (as amended, the “Sales Agreement”). The Sales Agreement provides for the sale of shares of our common stock, par value $0.0001 per share, (the…

Other Events. On December 15, 2025, Myseum, Inc. issued a press release announcing the completion of the sale of its approximately 34% ownership interest in RPM Interactive as part of a 100% acquisition of RPM Interactive by Avalon GloboCare Corp. (Nasdaq: ALBT). A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Entry into a Material Definitive Agreement. On December 11, 2025, Myseum, Inc. (the “Company”) entered into a Debt Forgiveness and Contribution Agreement (the “Debt Forgiveness and Contribution Agreement”) with RPM Interactive, Inc., a Nevada corporation (“RPM Interactive”). Pursuant to the Debt Forgiveness and Contribution Agreement, the Company agreed to forgive and extinguish, without any payment or other consideration, an aggregate of $5,202,132 previously advanced by the Company to RPM I…

The filing describes an amendment to the equity incentive plan, not a management change.

Other Events. On April 1, 2025, DatChat, Inc. (the “Company”) issued a press release announcing its Myseum social media platform has entered into a strategic relationship agreement with The Photo Managers (TPM) for collaboration, marketing and engagement with TPM’s broad network of over 700 professional photo managers. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Entry into a Material Definitive Agreement. On February 10, 2025, DatChat, Inc. (“we,” “us,” the “Company” or “DatChat”) entered into a Sales Agreement (the “Sales Agreement”) with The Benchmark Company, LLC (“Benchmark”), to sell shares of our common stock, par value $0.0001 per share, (the “Shares”) having an aggregate sales price of up to $6,000,000, from time to time, through an “at the market offering” program under which Benchmark will act as sales agent. The sales, if any, of the Share…

Entry into a Material Definitive Agreement. On January 8, 2025, DatChat, Inc. (the “Company”) entered into a securities purchase agreement (the “Purchase Agreement”) with certain institutional investors, pursuant to which the Company agreed to sell to such investors 1,200,000 shares (the “Shares”) of common stock of the Company (the “Common Stock”), at a purchase price of $4.25 per share of Common Stock (the “Offering”). The shares of Common Stock were offered by the Company pursuant to its s…

Entry into a Material Definitive Agreement. Dragon RPM Acquisition On October 29, 2024, Dragon Interact, Inc. (“Dragon”), a majority-owned subsidiary of DatChat, Inc (the “Company”), entered into a Share Exchange Agreement (the “Agreement”) with RPM Interactive, Inc., a Florida corporation (“RPM”), pursuant to which Dragon acquired 100% of the equity interests of RPM, including all assets of RPM in consideration for the issuance of 3,500,000 restricted shares of Dragon’s common stock. RPM’s a…

Other Events. On August 29, 2024, the Company issued a press release announcing the Purchase Agreement and acquisition of the Assets. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Entry into a Material Definitive Agreement. On August 27, 2024, DatChat, Inc. (the “Company”) entered into an Asset Purchase Agreement with Judaopta LLC, a Delaware limited liability company (the “Seller”), pursuant to which it acquired from Seller (i) certain software (the “RenAI Software”), which consists of an artificial intelligence (AI) tool designed used for media library organization with the ability to tag and rename images for PC and MAC devices using AI with integration to Gemini, O…