X0306 4 2018-10-12 0 0001279704 Cellectar Biosciences, Inc. CLRB 0001237404 HILL STEPHEN A C/O CELLECTAR BIOSCIENCES, INC. 3301 AGRICULTURE DRIVE MADISON WI 53716 1 0 0 0 Stock option (right to buy) 2.61 2018-10-12 4 A 0 13000 0 A 2028-10-12 Common Stock 13000 13000 D This option grant was divided into a definitive grant of 6,150 shares, which vest in equal monthly installments over a seven month period from the grant date, and a contingent grant of 6,850 shares, which are subject to the following conditions: (i) approval by Cellectar's stockholders of an increase in shares available under the Amended and Restated 2015 Stock Incentive Plan at the Corporation's 2019 annual meeting of stockholders or other special meeting of stockholders called for such purpose; and (ii) to the extent stockholder approval is received, the contingent grant shall vest immediately upon such stockholder approval. /s/ Christina Blakley, attorney-in-fact for Stephen A. Hill 2018-10-15