SC 13G

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934
(Amendment No.     )*

Emergent BioSolutions Inc.

(Name of Issuer)

Common Stock, $0.001 par value per share

(Title of Class of Securities)

29089Q 10 5

(CUSIP Number)

March 8, 2007

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

o Rule 13d-1(b)

o Rule 13d-1(c)

x Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

	1.	Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) S.S OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Advent Private Equity Fund III “A” Limited Partnership Advent Private Equity Fund III “B” Limited Partnership; Advent Private Equity Fund III “C” Limited Partnership; Advent Private Equity Fund III “D” Limited Partnership; Advent Private Equity Fund III GMBH & CO KG.; Advent Private Equity Fund III Affiliates; Advent Management III Limited Partnership.
	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)		o
		(b)		o
	3.	SEC Use Only
	4.	Citizenship or Place of Organization Advent Private Equity Fund III “A” Limited Partnership (England); Advent Private Equity Fund III “B” Limited Partnership (England); Advent Private Equity Fund III “C” Limited Partnership (England); Advent Private Equity Fund III “D” Limited Partnership (England); Advent Private Equity Fund III GMBH & CO KG. (Germany); Advent Private Equity Fund III Affiliates (England); Advent Management III Limited Partnership (Scotland).
Number of Shares Beneficially Owned by Each Reporting Person With			5.		Sole Voting Power 0
			6.		Shared Voting Power 0
			7.		Sole Dispositive Power 0
			8.		Shared Dispositive Power 0
	9.	Aggregate Amount Beneficially Owned by Each Reporting Person 0
	10.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o
	11.	Percent of Class Represented by Amount in Row (9) 0%
	12.	Type of Reporting Person (See Instructions) PN

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Item 1.
	(a)	Name of Issuer Emergent BioSolutions Inc.
	(b)	Address of Issuer’s Principal Executive Offices 300 Professional Drive Suite 250 Gaithersburg, Maryland 20879
Item 2.
	(a)	Name of Person Filing Advent Private Equity Fund III “A” Limited Partnership; Advent Private Equity Fund III “B” Limited Partnership; Advent Private Equity Fund III “C” Limited Partnership; Advent Private Equity Fund III “D” Limited Partnership; Advent Private Equity Fund III GMBH & CO KG.; Advent Private Equity Fund III Affiliates; Advent Management III Limited Partnership.
	(b)	Address of Principal Business Office or, if none, Residence Advent Private Equity Fund III “A” Limited Partnership 25 Buckingham Gate London SW1E 6LD United Kingdom Advent Private Equity Fund III “B” Limited Partnership 25 Buckingham Gate London SW1E 6LD United Kingdom Advent Private Equity Fund III “C” Limited Partnership 25 Buckingham Gate London SW1E 6LD United Kingdom Advent Private Equity Fund III “D” Limited Partnership 25 Buckingham Gate London SW1E 6LD United Kingdom Advent Private Equity Fund III GMBH & CO KG Theresienstrasse 6 Munich 80333 Germany

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		Advent Private Equity Fund III Affiliates 25 Buckingham Gate London SW1E 6LD United Kingdom Advent Management III Limited Partnership 50 Lothian Road, Festival Square Edinburgh EH3 9WJ United Kingdom
	(c)	Citizenship The citizenship of each of the funds is as follows: Advent Private Equity Fund III “A” Limited Partnership (England); Advent Private Equity Fund III “B” Limited Partnership (England); Advent Private Equity Fund III “C” Limited Partnership (England); Advent Private Equity Fund III “D” Limited Partnership (England); Advent Private Equity Fund III GMBH & CO KG. (Germany); Advent Private Equity Fund III Affiliates (England); Advent Management III Limited Partnership (Scotland).
	(d)	Title of Class of Securities Common Stock, $0.001 par value
	(e)	CUSIP Number 29089Q 10 5
Item 3.	If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
	(a)	o	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).
	(b)	o	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).
	(c)	o	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).
	(d)	o	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C 80a-8).
	(e)	o	An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);
	(f)	o	An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);
	(g)	o	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
	(h)	o	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
	(i)	o	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
	(j)	o	Group, in accordance with §240.13d-1(b)(1)(ii)(J).
			Not applicable.

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Item 4.	Ownership
Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.
	(a)	Amount beneficially owned:    0 shares
	(b)	Percent of class:    0%
	(c)	Number of shares as to which the person has:
		(i)	Sole power to vote or to direct the vote    Not applicable.
		(ii)	Shared power to vote or to direct the vote     0 shares
		(iii)	Sole power to dispose or to direct the disposition of    Advent Private Equity Fund III “A” Limited Partnership owns 0 shares; Advent Private Equity Fund III “B” Limited Partnership owns 0 shares; Advent Private Equity Fund III “C” Limited Partnership owns 0 shares; Advent Private Equity Fund III “D” Limited Partnership owns 0 shares; Advent Private Equity Fund III GMBH & CO KG. owns 0 shares; Advent Private Equity Fund III Affiliates owns 0 shares; Advent Management III Limited Partnership owns 0 shares.
		(iv)	Shared power to dispose or to direct the disposition of    None
Item 5.	Ownership of Five Percent or Less of a Class
If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following   x.
Item 6.	Ownership of More than Five Percent on Behalf of Another Person
	Not applicable.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person
	Not applicable.
Item 8.	Identification and Classification of Members of the Group
	Not applicable.
Item 9.	Notice of Dissolution of Group
	Not applicable.

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Item 10.	Certification
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Date: April 13, 2008
ADVENT PRIVATE EQUITY FUND III “A” LIMITED PARTNERSHIP
By:	/s/ Shahzad Malik
	Name:	Shahzad Malik
	Title:	General Partner
ADVENT PRIVATE EQUITY FUND III “B” LIMITED PARTNERSHIP
By:	/s/ Shahzad Malik
	Name:	Shahzad Malik
	Title:	General Partner
ADVENT PRIVATE EQUITY FUND III “C” LIMITED PARTNERSHIP
By:	/s/ Shahzad Malik
	Name:	Shahzad Malik
	Title:	General Partner
ADVENT PRIVATE EQUITY FUND III “D” LIMITED PARTNERSHIP
By:	/s/ Shahzad Malik
	Name:	Shahzad Malik
	Title:	General Partner
ADVENT PRIVATE EQUITY FUND III GMBH & CO. KG
By:	/s/ Shahzad Malik
	Name:	Shahzad Malik
	Title:	General Partner
ADVENT PRIVATE EQUITY FUND III AFFILIATES
By:	/s/ Shahzad Malik
	Name:	Shahzad Malik
	Title:	General Partner

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ADVENT MANAGEMENT III LIMITED PARTNERSHIP
By:	/s/ Shahzad Malik
	Name:	Shahzad Malik
	Title:	General Partner

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EX-1

Exhibit 1

EXHIBIT 1

Re: CUSIP No. 29089Q105

Agreement of
Advent Venture Partners LLP, Advent Private Equity Fund III Affiliates, Advent Management III Limited Partnership, Advent Private Equity Fund III A LTD Partnership, Advent Private Equity Fund III B LTD Partnership, Advent Private Equity Fund III C LTD Partnership, Advent Private Equity Fund III D LTD Partnership and Advent Private Equity Fund III GmbH & Co KG.

***

Each of the undersigned hereby agree that the Schedule 13G to which this Agreement is attached as Exhibit 1 is filed on behalf of it pursuant to Rule 13d-1(k)(1) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Notwithstanding the foregoing, each of the undersigned disclaim beneficial ownership of the shares of the other, except to the extent of his or its pecuniary interest therein.

***

/s/ Shahzad Malik

Shahzad Malik
General Partner of Advent Venture Partners LLP

/s/ Shahzad Malik

Shahzad Malik
General Partner of Advent Venture Partners LLP

acting in its capacity as Manager of

Advent Private Equity Fund III Affiliates

/s/ Shahzad Malik

Shahzad Malik
General Partner of Advent Venture Partners LLP

acting in its capacity as Manager of

Advent Management III Limited Partnership

/s/ Shahzad Malik

Shahzad Malik
General Partner of Advent Venture Partners LLP

acting in its capacity as Manager of

Advent Private Equity Fund III A LTD Partnership

/s/ Shahzad Malik

Shahzad Malik
General Partner of Advent Venture Partners LLP

acting in its capacity as Manager of

Advent Private Equity Fund III B LTD Partnership

/s/ Shahzad Malik

Shahzad Malik
General Partner of Advent Venture Partners LLP

acting in its capacity as Manager of

Advent Private Equity Fund III C LTD Partnership

Emergent Biosolutions  - 2009

/s/ Shahzad Malik

Shahzad Malik
General Partner of Advent Venture Partners LLP

acting in its capacity as Manager of

Advent Private Equity Fund III D LTD Partnership

/s/ Shahzad Malik

Shahzad Malik
General Partner of Advent Venture Partners LLP

acting in its capacity as Manager of

Advent Private Equity Fund III GmbH & Co KG

Dated:  13 February 2009