144 0001972424 XXXXXXXX LIVE 0001832038 Invivyd, Inc. 001-40703 1601 Trapelo Road Suite 178 Waltham MA 02451 781-819-0080 Allen Robert D. III Officer Common Stock Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

36631 25901.78 120142811 08/18/2025 Nasdaq Common Stock 08/15/2025 Common Stock acquired upon vesting of restricted stock units granted under the Issuer's 2021 Equity Incentive Plan Issuer N 99000 08/15/2025 Equity Compensation Y This Form 144 reports shares to be sold to satisfy the Reporting Person's tax withholding obligations upon vesting of a restricted stock unit award in non-discretionary "sell-to-cover" transactions pursuant to a Rule 10b5-1 plan applicable to the Reporting Person. Aggregate Market Value of the sale is based on a closing price of $0.7071 for the Issuer's common stock on August 15, 2025. The actual number of shares sold will depend on the sale price of the Issuer's common stock at the time of sale. Exhibit List: Exhibit 24.1 - Power of Attorney. 08/18/2025 02/20/2025 /s/ Jill Andersen attorney-in-fact for Robert D. Allen III