SCHEDULE 13G 0001224962 XXXXXXXX LIVE Common Stock, $0.0001 par value per share 11/18/2025 0001832038 INVIVYD, INC. 00534A102 209 Church Street New Haven CT 06510 Rule 13d-1(c) Perceptive Advisors LLC b DE 0 21785166 0 21785166 21785166 N 7.9 IA Joseph Edelman b X1 0 21785166 0 21785166 21785166 N 7.9 IN Perceptive Life Sciences Master Fund, Ltd. b E9 0 21785166 0 21785166 21785166 N 7.9 CO INVIVYD, INC. 209 Church Street, New Haven, CT 06510 The names of the persons filing this report (collectively, the "Reporting Persons") with respect to shares of Common Stock, $0.0001 par value per share (the "Common Stock") of INVIVYD, INC. (the "Issuer") are: Perceptive Advisors LLC ("Perceptive Advisors") Joseph Edelman ("Mr. Edelman") Perceptive Life Sciences Master Fund, Ltd. (the "Master Fund") The address of the principal business office of each of the Reporting Persons is: 51 Astor Place, 10th Floor New York, NY 10003 Perceptive Advisors is a Delaware limited liability company Mr. Edelman is a United States citizen The Master Fund is a Cayman Islands corporation Y The information required by this item with respect to each Reporting Person is set forth in Rows 5 through 9 and 11 of the cover pages to this Schedule 13G. The ownership percentages reported are based on 277,064,852 outstanding shares of Common Stock, as reported by the Issuer in its prospectus supplement filed pursuant to Rule 424(b)(5) with the Securities and Exchange Commission on November 19, 2025. Neither Perceptive Advisors nor Mr. Edelman directly hold any shares of Common Stock. The Master Fund directly holds 21,785,166 shares of Common Stock. Perceptive Advisors serves as the investment manager to the Master Fund. Mr. Edelman is the managing member of Perceptive Advisors. Perceptive Advisors: 7.9% Mr. Edelman: 7.9% Master Fund: 7.9% Perceptive Advisors: 0 Mr. Edelman: 0 Master Fund: 0 Perceptive Advisors: 21,785,166 Mr. Edelman: 21,785,166 Master Fund: 21,785,166 Perceptive Advisors: 0 Mr. Edelman: 0 Master Fund: 0 Perceptive Advisors: 21,785,166 Mr. Edelman: 21,785,166 Master Fund: 21,785,166 Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. 99.1 - Joint Filing Agreement Perceptive Advisors LLC /s/ Joseph Edelman 11/25/2025 Joseph Edelman /s/ Joseph Edelman 11/25/2025 Perceptive Life Sciences Master Fund, Ltd. /s/ Joseph Edelman 11/25/2025