X0508 4 2025-05-30 0001595097 Corbus Pharmaceuticals Holdings, Inc. CRBP 0001947086 Altmeyer Anne C/O CORBUS PHARMACEUTICALS HOLDINGS, INC 500 RIVER RIDGE DRIVE NORWOOD MA 02062 true false false false true Common Stock, par value $0.0001 per share 2025-05-30 4 S false 1392 7.2526 D 1391 D Common Stock, par value $0.0001 per share 2025-05-30 4 A false 4800 0 A 6191 D Stock options (right to buy) 7.42 2025-05-30 4 A false 16000 0 A 2035-05-30 Common Stock 16000 16000 D This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 14, 2024. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.16 to $7.50. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. On May 30, 2025, 4,800 restricted stock units ("RSUs") were granted, which will be settled in shares of common stock, par value $0.0001. The RSUs will vest 100% on the one-year anniversary from the date of grant. This amount includes 4,800 unvested RSUs that were granted on May 30, 2025. The option award was made in accordance with the terms of the issuer's 2024 Equity Compensation Plan. The option will vest 100% on the one-year anniversary from the date of grant. /s/ Meghan Houghton, attorney-in-fact for Anne Altmeyer 2025-06-02