X0306 4 2017-03-09 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 2017-03-09 4 M 0 13236 A 1669372 D Common Stock 2017-03-09 4 F 0 3621 30.98 D 1665751 D Common Stock 2017-03-10 4 M 0 20554 A 1686305 D Common Stock 2017-03-10 4 F 0 6089 31.05 D 1680216 D Common Stock 4344250 I By Intervac, L.L.C. Common Stock 1524155 I By Biovac, LLC Restrictive Stock Units 2017-03-09 4 M 0 13236 0.00 D Common Stock 13236 82618 D Restrictive Stock Units 2017-03-10 4 M 0 20554 0.00 D Common Stock 20554 62064 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 the Issuer's continuing employees. Accordingly, Mr. El-Hibri received an equitable adjustment to the number and grant price of his restricted stock units. On March 10, 2015, Mr. El-Hibri was granted 39,709 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 March 11, 2014, Mr. El-Hibri was granted 61,622 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. /s/ Carl A. Valenstein, attorney-in-fact 2017-03-10