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Exhibit 4.8
  MICROMET HOLDINGS, INC.
 
  Term
 Method of Exercise; Payment; Issuance of New Warrant




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Stock Fully Paid; Reservation of Shares
 Adjustment of Warrant Price and Number of Shares
 Reclassification or Merger
 -2-




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Subdivision or Combination of Shares
 Stock Dividends and Other Distributions
 Adjustment of Number of Shares
 -3-




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Notice of Adjustments
 Fractional Shares
 Compliance with Securities Act; Disposition of Warrant or Shares of Common Stock
 Compliance with Securities Act
    -4-




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Disposition of Warrant or Shares
 Applicability of Restrictions
 -5-




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provided however
 Rights as Shareholders
 [Reserved]
 Additional Rights
 Acquisition Transactions
 Right to Convert Warrant into Stock: Net Issuance
 Right to Convert
 X
    
    =
    
    B - A

Y
 Where:
    
    X
    
    =
    
    the number of shares of Common Stock that shall be issued to holderY
    
    =
    
    the fair market value of one share of Common Stock
 -6-




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A
    
    =
    
    the aggregate Warrant Price of the specified number of
Converted Warrant Shares immediately prior to the exercise of the Conversion
Right (i.e., the number of Converted Warrant Shares multiplied bythe Warrant
Price)B
    
    =
    
    the aggregate fair market value of the specified number of
Converted Warrant Shares (i.e., the number of Converted Warrant Shares
multiplied bythe fair market value of one Converted Warrant Share)
  Method of Exercise
 Determination of Fair Market Value
   -7-




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Exercise Prior to Expiration.
 Representations and Warranties
     -8-




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Modification and Waiver
 Notices
 Binding Effect on Successors
 Lost Warrants or Stock Certificates
 Descriptive Headings
 Governing Law
 Survival of Representations, Warranties and Agreements
 -9-




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Remedies
 No Impairment of Rights
 Severability
 Recovery of Litigation Costs
 Entire Agreement; Modification
 [Remainder of page intentionally left blank; signature page follows]
 -10-




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MICROMET HOLDINGS, INC.ByTitleAddress:
 
 [HOLDER]ByTitleAddress:
 -11-




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o
    
    elects to purchase___ shares of Common Stock of the Company pursuant to
the terms of the attached Warrant, and tenders herewith payment of the
purchase price of such shares in full, oro
    
    elects to exercise its net issuance rights pursuant to Section 10.2 of the
attached Warrant with respect to___ shares of Common Stock.
  
  
 
   (Signature)




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o
 o
   (Signature)




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Number of MicrometHoldings, Inc. Shares
    
    Number of Micromet,Issuable Prior to
    
    Inc. Shares IssuableHolder
    
    Expiration Date
    
    Merger
    
    Following MergerGATX European
Venture Finance
Limited
    
    July 15, 2012
    
    
    176
    
    
    
    923Pictet Private
Equity Investors SA
    
    July 15, 2012
    
    
    1,580
    
    
    
    8,291GATX European
Venture Finance
Limited
    
    April 30, 2013
    
    
    878
    
    
    
    4,607Pictet Private
Equity Investors SA
    
    April 30, 2013
    
    
    7,908
    
    
    
    41,495Total
    
    
    
    
    10,542
    
    
    
    55,316