<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>SEC FORM 
            4</title>
<style type="text/css">
              .FormData {color: blue; background-color: white; font-size: small; font-family: Times, serif;}
              .FormDataC {color: blue; background-color: white; font-size: small; font-family: Times, serif; text-align: center;}
              .FormDataR {color: blue; background-color: white; font-size: small; font-family: Times, serif; text-align: right;}
              .SmallFormData {color: blue; background-color: white; font-size: x-small; font-family: Times, serif;}
              .FootnoteData {color: green; background-color: white; font-size: x-small; font-family: Times, serif;}
              .FormNumText {font-size: small; font-weight: bold; font-family: arial, helvetica, sans-serif;}
              .FormAttention {font-size: medium; font-weight: bold; font-family: helvetica;}
              .FormText {font-size: small; font-weight: normal; font-family: arial, helvetica, sans-serif; text-align: left;}
              .FormTextR {font-size: small; font-weight: normal; font-family: arial, helvetica, sans-serif; text-align: right;}
              .FormTextC {font-size: small; font-weight: normal; font-family: arial, helvetica, sans-serif; text-align: center;}
              .FormEMText {font-size: medium; font-style: italic; font-weight: normal; font-family: arial, helvetica, sans-serif;}
              .FormULText {font-size: medium; text-decoration: underline; font-weight: normal; font-family: arial, helvetica, sans-serif;}
              .SmallFormText {font-size: xx-small; font-family: arial, helvetica, sans-serif; text-align: left;}
              .SmallFormTextR {font-size: xx-small; font-family: arial, helvetica, sans-serif; text-align: right;}
              .SmallFormTextC {font-size: xx-small; font-family: arial, helvetica, sans-serif; text-align: center;}
              .MedSmallFormText {font-size: x-small; font-family: arial, helvetica, sans-serif; text-align: left;}
              .FormTitle {font-size: medium; font-family: arial, helvetica, sans-serif; font-weight: bold;}
              .FormTitle1 {font-size: small; font-family: arial, helvetica, sans-serif; font-weight: bold; border-top: black thick solid;}
              .FormTitle2 {font-size: small; font-family: arial, helvetica, sans-serif; font-weight: bold;}
              .FormTitle3 {font-size: small; font-family: arial, helvetica, sans-serif; font-weight: bold; padding-top: 2em; padding-bottom: 1em;}
              .SectionTitle {font-size: small; text-align: left; font-family: arial, helvetica, sans-serif; 
              		font-weight: bold; border-top: gray thin solid; border-bottom: gray thin solid;}
              .FormName {font-size: large; font-family: arial, helvetica, sans-serif; font-weight: bold;}
              .CheckBox {text-align: center; width: 5px; cell-spacing: 0; padding: 0 3 0 3; border-width: thin; border-style: solid;  border-color: black:}
              body {background: white;}
      </style>
</head>
<body>SEC Form 4 
   <table width="100%" border="0" cellspacing="0" cellpadding="4">
<tr>
<td width="20%" colspan="2" valign="top" align="center" class="FormName">FORM 4</td>
<td rowspan="2" width="60%" valign="middle" align="center">
<span class="FormTitle">UNITED STATES SECURITIES AND EXCHANGE COMMISSION</span><br><span class="MedSmallFormText">Washington, D.C. 20549</span><br><br><span class="FormTitle">STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP</span><br><br><span class="MedSmallFormText">Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934</span><br><span class="MedSmallFormText">or Section 30(h) of the Investment Company Act of 1940</span>
</td>
<td rowspan="2" width="20%" valign="top" align="center"><table width="100%" border="1" summary="OMB Approval Status Box">
<tr><td class="FormTextC">OMB APPROVAL</td></tr>
<tr><td><table width="100%" border="0" summary="OMB Interior Box">
<tr>
<td class="SmallFormText" colspan="3">OMB Number:</td>
<td class="SmallFormTextR">3235-0287</td>
</tr>
<tr><td class="SmallFormText" colspan="4">Estimated average burden</td></tr>
<tr>
<td class="SmallFormText" colspan="3">hours per response:</td>
<td class="SmallFormTextR">0.5</td>
</tr>
</table></td></tr>
</table></td>
</tr>
<tr valign="middle">
<td><table width="100%" border="1" cellpadding="0" cellspacing="0"><tr><td>  </td></tr></table></td>
<td class="SmallFormText">Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. 
         <i>See</i>

         Instruction 1(b).</td>
</tr>
</table>
<table width="100%" border="1" cellspacing="0" cellpadding="4">
<tr>
<td rowspan="3" width="35%" valign="top">
<span class="MedSmallFormText">1. Name and Address of Reporting Person<sup>*</sup></span><table border="0" width="100%"><tr><td><a href="/cgi-bin/browse-edgar?action=getcompany&amp;CIK=0001514588">Havey Adam</a></td></tr></table>
<hr width="98%">
<table border="0" width="100%"><tr>
<td width="33%" class="MedSmallFormText">(Last)</td>
<td width="33%" class="MedSmallFormText">(First)</td>
<td width="33%" class="MedSmallFormText">(Middle)</td>
</tr></table>
<table border="0" width="100%">
<tr><td><span class="FormData">400 PROFESSIONAL DR, SUITE 400</span></td></tr>
<tr><td><span class="FormData"></span></td></tr>
</table>
<hr width="98%">
<span class="MedSmallFormText">(Street)</span><table border="0" width="100%"><tr>
<td width="33%"><span class="FormData">GAITHERSBURG</span></td>
<td width="33%"><span class="FormData">MD</span></td>
<td width="33%"><span class="FormData">20879</span></td>
</tr></table>
<hr width="98%">
<table border="0" width="100%"><tr>
<td width="33%" class="MedSmallFormText">(City)</td>
<td width="33%" class="MedSmallFormText">(State)</td>
<td width="33%" class="MedSmallFormText">(Zip)</td>
</tr></table>
</td>
<td width="35%" valign="top">
<span class="MedSmallFormText">2. Issuer Name <b>and</b> Ticker or Trading Symbol
      </span><br><a href="/cgi-bin/browse-edgar?action=getcompany&amp;CIK=0001367644">Emergent BioSolutions Inc.</a>
     [ <span class="FormData">EBS</span> ]
   </td>
<td rowspan="2" valign="top">
<span class="MedSmallFormText">5. Relationship of Reporting Person(s) to Issuer
      </span><br><span class="MedSmallFormText">(Check all applicable)</span><table border="0" width="100%">
<tr>
<td width="15%" align="center"></td>
<td width="35%" class="MedSmallFormText">Director</td>
<td width="15%" align="center"></td>
<td width="35%" class="MedSmallFormText">10% Owner</td>
</tr>
<tr>
<td align="center"><span class="FormData">X</span></td>
<td class="MedSmallFormText">Officer (give title below)</td>
<td align="center"></td>
<td class="MedSmallFormText">Other (specify below)</td>
</tr>
<tr>
<td width="15%" align="center"></td>
<td width="35%" align="left" style="color: blue">EVP, Business Operations</td>
<td width="15%" align="center"></td>
<td width="35%" align="left" style="color: blue"></td>
</tr>
</table>
</td>
</tr>
<tr><td valign="top">
<span class="MedSmallFormText">3. Date of Earliest Transaction
         (Month/Day/Year)</span><br><span class="FormData">02/28/2022</span>
</td></tr>
<tr>
<td valign="top">
<span class="MedSmallFormText">4. If Amendment, Date of Original Filed
         (Month/Day/Year)</span><br>
</td>
<td valign="top">
<span class="MedSmallFormText">6. Individual or Joint/Group Filing (Check Applicable Line)
      </span><table border="0" width="100%">
<tr>
<td width="15%" align="center"><span class="FormData">X</span></td>
<td width="85%" class="MedSmallFormText">Form filed by One Reporting Person</td>
</tr>
<tr>
<td width="15%" align="center"></td>
<td width="85%" class="MedSmallFormText">Form filed by More than One Reporting Person</td>
</tr>
</table>
</td>
</tr>
</table>
<table width="100%" border="1" cellspacing="0" cellpadding="4">
<thead>
<tr><th width="100%" valign="top" colspan="11" align="center" class="FormTextC"><b>Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned</b></th></tr>
<tr>
<th width="36%" valign="top" rowspan="2" align="left" class="MedSmallFormText">1. Title of Security (Instr. 
      3)
   </th>
<th width="6%" valign="top" rowspan="2" align="left" class="SmallFormText">2. Transaction Date
      (Month/Day/Year)</th>
<th width="5%" valign="top" rowspan="2" align="left" class="SmallFormText">2A. Deemed Execution Date, if any
      (Month/Day/Year)</th>
<th width="7%" valign="top" colspan="2" align="left" class="SmallFormText">3. Transaction Code (Instr. 
      8)
   </th>
<th width="19%" valign="top" colspan="3" align="left" class="SmallFormText">4. Securities Acquired (A) or Disposed Of (D) (Instr. 
      3, 4 and 5)
   </th>
<th width="11%" valign="top" rowspan="2" align="left" class="SmallFormText">5. 
      Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 
      3 and 4)
   </th>
<th width="9%" valign="top" rowspan="2" align="left" class="SmallFormText">6. Ownership Form: Direct (D) or Indirect (I) (Instr. 
      4)
   </th>
<th width="8%" valign="top" rowspan="2" align="left" class="SmallFormText">7. Nature of Indirect Beneficial Ownership (Instr. 
      4)
   </th>
</tr>
<tr>
<th width="4%" align="center" class="SmallFormText">Code</th>
<th width="3%" align="center" class="SmallFormText">V</th>
<th width="8%" align="center" class="SmallFormText">Amount</th>
<th width="5%" align="center" class="SmallFormText">(A) or (D)</th>
<th width="6%" align="center" class="SmallFormText">Price</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left"><span class="FormData">Common Stock</span></td>
<td align="center"><span class="FormData">03/01/2022</span></td>
<td align="center"></td>
<td align="center"><span class="SmallFormData">A</span></td>
<td align="center"></td>
<td align="center">
<span class="FormData">32,323</span><span class="FootnoteData"><sup>(1)</sup></span>
</td>
<td align="center"><span class="FormData">A</span></td>
<td align="center">
<span class="FormText">$</span><span class="FormData">0</span>
</td>
<td align="center"><span class="FormData">69,117</span></td>
<td align="center"><span class="FormData">D</span></td>
<td align="left"></td>
</tr>
<tr>
<td align="left"><span class="FormData">Common Stock</span></td>
<td align="center"><span class="FormData">03/01/2022</span></td>
<td align="center"></td>
<td align="center"><span class="SmallFormData">A</span></td>
<td align="center"></td>
<td align="center">
<span class="FormData">17,822</span><span class="FootnoteData"><sup>(2)</sup></span>
</td>
<td align="center"><span class="FormData">A</span></td>
<td align="center">
<span class="FormText">$</span><span class="FormData">0</span>
</td>
<td align="center"><span class="FormData">86,939</span></td>
<td align="center"><span class="FormData">D</span></td>
<td align="left"></td>
</tr>
<tr>
<td align="left">
<span class="FormData">Common Stock</span><span class="FootnoteData"><sup>(3)</sup></span>
</td>
<td align="center"><span class="FormData">02/28/2022</span></td>
<td align="center"></td>
<td align="center"><span class="SmallFormData">F</span></td>
<td align="center"></td>
<td align="center"><span class="FormData">739</span></td>
<td align="center"><span class="FormData">D</span></td>
<td align="center">
<span class="FormText">$</span><span class="FormData">39.64</span>
</td>
<td align="center"><span class="FormData">86,200</span></td>
<td align="center"><span class="FormData">D</span></td>
<td align="left"></td>
</tr>
</tbody>
</table>
<table width="100%" border="1" cellspacing="0" cellpadding="4">
<thead>
<tr><th width="100%" valign="top" colspan="16" align="center" class="FormTextC">
<b>Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned</b><br><b>(e.g., puts, calls, warrants, options, convertible securities)</b>
</th></tr>
<tr>
<th width="13%" valign="top" rowspan="2" align="left" class="SmallFormText">1. Title of Derivative Security (Instr. 
      3)
   </th>
<th width="5%" valign="top" rowspan="2" align="left" class="SmallFormText">2. Conversion or Exercise Price of Derivative Security
   </th>
<th width="5%" valign="top" rowspan="2" align="left" class="SmallFormText">3. Transaction Date
      (Month/Day/Year)</th>
<th width="5%" valign="top" rowspan="2" align="left" class="SmallFormText">3A. Deemed Execution Date, if any
      (Month/Day/Year)</th>
<th width="9%" valign="top" colspan="2" align="left" class="SmallFormText">4. Transaction Code (Instr. 
      8)
   </th>
<th width="10%" valign="top" colspan="2" align="left" class="SmallFormText">5. 
      Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 
      3, 4 and 5)
   </th>
<th width="9%" valign="top" colspan="2" align="left" class="SmallFormText">6. Date Exercisable and Expiration Date 
      (Month/Day/Year)</th>
<th width="17%" valign="top" colspan="2" align="left" class="SmallFormText">7. Title and Amount of Securities Underlying Derivative Security (Instr. 
      3 and 4)
   </th>
<th width="6%" valign="top" rowspan="2" align="left" class="SmallFormText">8. Price of Derivative Security (Instr. 
      5)
   </th>
<th width="6%" valign="top" rowspan="2" align="left" class="SmallFormText">9. 
      Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 
      4)
   </th>
<th width="6%" valign="top" rowspan="2" align="left" class="SmallFormText">10. Ownership Form: Direct (D) or Indirect (I) (Instr. 
      4)
   </th>
<th width="7%" valign="top" rowspan="2" align="left" class="SmallFormText">11. Nature of Indirect Beneficial Ownership (Instr. 
      4)
   </th>
</tr>
<tr>
<th width="4%" valign="bottom" align="center" class="SmallFormText">Code</th>
<th width="4%" valign="bottom" align="center" class="SmallFormText">V</th>
<th width="5%" valign="bottom" align="center" class="SmallFormText">(A)</th>
<th width="5%" valign="bottom" align="center" class="SmallFormText">(D)</th>
<th width="5%" valign="bottom" align="center" class="SmallFormText">Date Exercisable</th>
<th width="4%" valign="bottom" align="center" class="SmallFormText">Expiration Date</th>
<th width="10%" valign="bottom" align="center" class="SmallFormText">Title</th>
<th width="7%" valign="bottom" align="center" class="SmallFormText">Amount or Number of Shares</th>
</tr>
</thead>
<tbody><tr>
<td align="left"><span class="SmallFormData">Employee Stock Options (Right to Buy)</span></td>
<td align="center">
<span class="SmallFormText">$</span><span class="SmallFormData">41.38</span>
</td>
<td align="center"><span class="SmallFormData">03/01/2022</span></td>
<td align="center"></td>
<td align="center"><span class="SmallFormData">A</span></td>
<td align="center"></td>
<td align="center"><span class="SmallFormData">42,289</span></td>
<td align="center"></td>
<td align="center">
<span class="SmallFormData">
                
            </span><span class="FootnoteData"><sup>(4)</sup></span>
</td>
<td align="center"><span class="SmallFormData">02/28/2029</span></td>
<td align="center"><span class="SmallFormData">Common Stock</span></td>
<td align="center"><span class="FormData">42,289</span></td>
<td align="center">
<span class="SmallFormText">$</span><span class="SmallFormData">41.38</span>
</td>
<td align="center"><span class="SmallFormData">42,289</span></td>
<td align="center"><span class="SmallFormData">D</span></td>
<td align="left"></td>
</tr></tbody>
</table>
<table border="0" width="100%">
<tr><td class="MedSmallFormText"><b>Explanation of Responses:</b></td></tr>
<tr><td class="FootnoteData">1. Consists of restricted stock units granted under the company's Stock Incentive Plan. These restricted stock units vest either in three equal annual installments beginning on the day prior to the first anniversary of the date of grant (10,573 shares) or on the day prior to the second anniversary date of the grant (21,750 shares), assuming continued service with the company. Each restricted stock unit represents the right of the Reporting Person to receive one share of common stock of Emergent BioSolutions Inc., subject to adjustment as provided in the grant agreement.</td></tr>
<tr><td class="FootnoteData">2. Consists of performance stock units granted under the Emergent BioSolutions Inc. Stock Incentive Plan. Each PSU represents a right to receive one share of common stock. The PSUs vest upon achievement with respect to adjusted EBITDA as a percentage of total GAAP revenue calculated on a cumulative basis over the three-year period beginning January 1, 2022 and ending December 31, 2024, as certified by the Compensation Committee following the performance period.  The amount reported is based on the target performance payout factor, or 100%.</td></tr>
<tr><td class="FootnoteData">3. Represents shares of common stock withheld by the Company in exchange for payment of the employee's withholding taxes.</td></tr>
<tr><td class="FootnoteData">4. Vests in three equal installments beginning on the day prior to the first anniversary of the date of grant, assuming continued service with the company.</td></tr>
<tr><td class="FormText"><b>Remarks:</b></td></tr>
<tr><td class="FootnoteData"></td></tr>
</table>
<table width="100%" border="0">
<tr>
<td width="60%"></td>
<td width="20%"><u><span class="FormData">/s/ S. Scott Lieberman, Attorney-in-fact</span></u></td>
<td width="20%"><u><span class="FormData">03/02/2022</span></u></td>
</tr>
<tr>
<td></td>
<td class="MedSmallFormText">** Signature of Reporting Person</td>
<td class="MedSmallFormText">Date</td>
</tr>
<tr><td colspan="3" class="MedSmallFormText">Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.</td></tr>
<tr><td colspan="3" class="MedSmallFormText">* If the form is filed by more than one reporting person, 
                  <i>see</i>

                  Instruction 
                  4

                  (b)(v).</td></tr>
<tr><td colspan="3" class="MedSmallFormText">** Intentional misstatements or omissions of facts constitute Federal Criminal Violations 
                  <i>See</i>

                  18 U.S.C. 1001 and 15 U.S.C. 78ff(a).</td></tr>
<tr><td colspan="3" class="MedSmallFormText">Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, 
                  <i>see</i>

                  Instruction 6 for procedure.</td></tr>
<tr><td colspan="3" class="MedSmallFormText"><b>Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.</b></td></tr>
</table>
</body>
</html>
