X0306 4 2017-02-28 0 0001367644 Emergent BioSolutions Inc. EBS 0001380185 El-Hibri Fuad 400 PROFESSIONAL DRIVE, SUITE 400 GAITHERSBURG MD 20879 1 1 1 0 Chairman Common Stock 2017-02-28 4 M 0 9722 A 1658795 D Common Stock 2017-02-28 4 F 0 2659 30.63 D 1656136 D Common Stock 4344250 I By Intervac, L.L.C. Common Stock 1524155 I By Biovac, LLC Restrictive Stock Units 2017-02-28 4 A 0 29382 0.00 A Common Stock 29382 105576 D Restrictive Stock Units 2017-02-28 4 M 0 9722 0.00 D Common Stock 9722 95854 D Employee Stock Option (right to buy) 30.63 2017-02-28 4 A 0 58747 0.00 A 2024-02-27 Common Stock 58747 58747 D Restricted stock units convert into common stock on a one-for-one basis. Mr. El-Hibri's wife, individually, and Mr. and Mrs. El-Hibri, as tenants by the entirety, collectively hold an aggregate 40.65% equity interest in Intervac, L.L.C., which in turn is the direct owner of 4,344,250 shares of the Issuer's common stock. Mr. El-Hibri disclaims beneficial ownership of the shares of the Issuer's common stock directly owned by Intervac, L.L.C. for purposes of Section 16 of the Exchange act or otherwise, except to the extent of his pecuniary interest therein. Mr. El-Hibri holds individually and with his wife, as tenants by the entirety, an aggregate 89.2% equity interest in Biovac, LLC, which in turn is the direct owner of 1,524,155 shares of the Issuer's common stock. Mr. El-Hibri disclaims beneficial ownership of the shares of the Issuer's common stock directly owned by Biovac, LLC for purposes of Section 16 of the Exchange act or otherwise, except to the extent of his pecuniary interest therein. In connection with the Issuer's spin-off of Aptevo Therapeutics Inc. effective on August 1, 2016 (the "Spin-off"), the Issuer made certain adjustments to the price and number of equity awards held by continuing employees. Accordingly, Mr. El-Hibri, as a continuing Emergent employee with equity awards issued prior to the Spin-off, received an equitable adjustment to the number and grant price of his restricted stock units. On February 28, 2017, Mr. El-Hibri was granted 29,382 restricted stock units vesting in three equal annual installments beginning on the day prior to the anniversary of the grant date. On March 1, 2016, Mr. El-Hibri was granted 29,167 restricted stock units (after giving effect to the adjustment in connection with the Spin-off) vesting in three equal annual installments beginning on the day prior to the anniversary of the grant date. On February 28, 2017, Mr. El-Hibri was granted 58,747 stock options vesting in three equal annual installments beginning on the day prior to the anniversary of the grant date. /s/ Carl A. Valenstein, attorney-in-fact 2017-03-02