X0206 3 2021-02-03 0 0001785345 Landos Biopharma, Inc. LABP 0001843575 Bassaganya-Riera Josep C/O LANDOS BIOPHARMA, INC. 1800 KRAFT DRIVE, SUITE 216 BLACKSBURG VA 24060 1 1 1 0 Chairman, President and CEO Common Stock 8229881 I By Trust Common Stock 766405 I By GRAT Common Stock 823956 I By GRAT Of these shares, 285,140 shares are unvested and subject to repurchase by the Issuer if the Reporting Person ceases to provide services to the Issuer prior to the vesting of the shares. Reflects a 1.8249-for-1 stock split of the Issuer's common stock effected on January 29, 2021. Securities are held by the the Josep Bassaganya-Riera Revocable Trust Agreement dated April 9, 2018, as amended (the "2018 Trust"). The Reporting Person is the sole trustee of the 2018 Trust and the beneficiaries are the Reporting Person's immediate family members. The Reporting Person disclaims beneficial ownership of these securities, except to the extend of his pecuniary interest therein. These Shares are held by the the Josep Bassaganya-Riera Grantor Retained Annuity Trust No. 1 dated June 28, 2018 (the "2018 GRAT"). The Reporting Person is the sole trustee of the 2018 GRAT and the beneficiaries are the Reporting Person's immediate family members. The Reporting Person disclaims beneficial ownership of these securities, except to the extend of his pecuniary interest therein. These Shares are held by the the Josep Bassaganya-Riera Grantor Retained Annuity Trust No. 2 dated March 26, 2019 (the "2019 GRAT"). The Reporting Person is the sole trustee or the 2019 GRAT and the beneficiaries are the Reporting Person's immediate family members. The Reporting Person disclaims beneficial ownership of these securities, except to the extend of his pecuniary interest therein. Exhibit List - Exhibit 24 - Power of Attorney /s/ Eric W. Blanchard, Attorney-in-Fact 2021-02-03