Exhibit 4.30
 Private and Confidential
 Date 21 October 2009
 STEALTHGAS INC.
as Borrower
 -and-
 DEUTSCHE BANK AG
FILIALE DEUTSCHLANDGESCHÄFT
 
 SUPPLEMENTAL AGREEMENT
 
 in relation to a Loan Agreement
dated 12 February 2008,
for a loan facility of up to USD40,250,000




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Index
 Clause
    
    
    
    Page No1
    
    INTERPRETATION
    
    
    12
    
    AGREEMENT OF THE LENDER
    
    
    13
    
    CONDITIONS PRECEDENT
    
    
    24
    
    REPRESENTATIONS AND WARRANTIES
    
    
    35
    
    AMENDMENTS TO LOAN AGREEMENT AND OTHER SECURITY DOCUMENTS
    
    
    36
    
    FURTHER ASSURANCES
    
    
    47
    
    FEES AND EXPENSES
    
    
    58
    
    NOTICES
    
    
    59
    
    SUPPLEMENTAL
    
    
    510
    
    LAW AND JURISDICTION
    
    
    6




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THIS SUPPLEMENTAL AGREEMENT
 BETWEEN
 (1)
    
    STEALTHGAS INC. as Borrower (the Borrower); and(2)
    
    DEUTSCHE BANK AG FILIALE DEUTSCHLANDGESCHÄFTas
Lender (the Lender).
 BACKGROUND
 (A)
    
    Pursuant to a loan agreement dated 12 February 2008 made between
(i) the Borrower and (ii) the Lender as lender there is outstanding and owing to
the Lender USD36,500,000.(B)
    
    The Borrower has made a request to the Lender to amend the said loan agreement.(C)
    
    This Agreement sets out the terms and conditions on which the
Lender agrees at the request of the Borrower to amend the Loan Agreement.
 IT IS AGREED
 1
    
    INTERPRETATION1.1
    
    Defined expressions.Words and expressions defined in the Loan Agreement shall have
the same meanings when used in this Agreement unless the context otherwise
requires.1.2
    
    Definitions.In this Agreement, unless the contrary intention appears:Conditions Satisfaction Date means, the date on which the Lender shall have
received all of the documents referred to in clause 3.1;Loan Agreement means the Loan Agreement dated 12 February 2008 referred to
in Recital (A); andMortgage Addendum means an addendum to the Mortgage, in such form as the
Lender may require in its sole discretion.1.3
    
    Application of construction and Interpretation provisions of Loan
Agreement.Clauses 1.2,1.3 and 1.4 of the Loan Agreement apply, with any
necessary modifications, to this Agreement.2
    
    AGREEMENT OF THE LENDER2.1
    
    Agreement of the Lender.The Lender, relying upon each of the representations and
warranties in Clause 4 and subject to Clause 3, agrees to amend the Loan Agreement as
set out in Clauses 5.1 and 5.2 below with effect from the dates stated respectively in
those Clauses.2.2
    
    Waiver.The Lender hereby waives the obligations of the Borrower set out in Clause 8.2 of the
Loan Agreement until the earlier of (i) 20 October 2009 (or such other date as the Lender may agree
in writing) and (ii) the Conditions Satisfaction Date.
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3
    
    CONDITIONS PRECEDENT3.1
    
    Conditions precedent.The conditions referred to in Clause 2.1 are that the Lender shall have
received the following documents:(a)
    
    Corporate documentsCertified Copies of all documents which evidence or relate to the constitution of the
Borrower and the Guarantor and its current corporate existence;(b)
    
    Corporate authorities
 (i)
    
    Certified Copies of resolutions of the directors of the Borrower and the Guarantor
approving such of this Agreement and the Mortgage Addendum to which the Borrower or the
Guarantor is a party and authorising the execution and delivery thereof and performance of
the Borrowers or the Guarantors obligations thereunder, additionally certified by an
officer of the Borrower or the Guarantor as having been duly passed at a duly convened
meeting of the directors of the Borrower or the Guarantor and not having been amended,
modified or revoked and being in full force and effect; and(ii)
    
    originals of any powers of attorney issued by the Borrower and the Guarantor pursuant to such
resolutions;
 (c)
    
    Certificate of incumbencya list of directors and officers of the Borrower and the Guarantor specifying the names
and positions of such persons, certified by an officer of the Borrower or the Guarantor
to be true, complete and up to date;(d)
    
    Mortgage Addendum registrationevidence that the Mortgage Addendum has been duly registered against the Vessel in
accordance with the laws of the Marshall Islands;(e)
    
    Laws of the Marshall Islands: opinionan opinion of the Lenders nominated special legal advisers in respect of the laws of
the Marshall Islands;(f)
    
    London Agentdocumentary evidence that the agent for service of process named in clause 18.2 of the
Loan Agreement has accepted its appointment in respect of this Agreement;(g)
    
    Further opinions, etcany further opinions, consents, agreements and documents in connection with this
Agreement and the Security Documents which the Lender may request by
notice to the
Borrower;
 2




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(h)
    
    Feesevidence that all fees due and payable to the Lender have been paid in full;(i)
    
    Endorsementthe endorsement at the end of this Agreement signed by each
Security Party (other than
the Borrower).4
    
    REPRESENTATIONS AND WARRANTIES4.1
    
    Repetition of Loan Agreement representations and warranties.The Borrower
represents and warrants to the Lender that the representations and warranties in Clause 7
of the Loan Agreement, as amended and supplemented by this Agreement and updated with
appropriate modifications to refer to this Agreement, remain true and not misleading if
repeated on the date of this Agreement with reference to the circumstances now existing.5
    
    AMENDMENTS TO LOAN AGREEMENT AND OTHER SECURITY DOCUMENTS5.1
    
    Specific amendments to Loan Agreement.With effect on and from the date of this
Agreement the Loan Agreement shall be, and shall be deemed by this Agreement to be,
amended as follows:
 (a)
    
    by adding in Clause 1.2 thereof the definition of Mortgage Addendum
as set out in Clause 1.2 of this Agreement;(b)
    
    by adding in the definition of Approved Broker after the words
AP Moeller of Copenhagen the words and (vi) Allied Shipbroking Inc. of
Athens, Greece;(c)
    
    by deleting the definition of Margin in Clause 1.2 thereof and
replacing it with Margin means two per cent (2%) per annum; and(d)
    
    by deleting from the first line of Clause 8.1.6 the words accounts of
the Guarantor and and insert in the fifth line thereof after the word half-year
the words and unaudited accounts of the Guarantor in respect of each financial
year, each; and(e)
    
    by construing references throughout to this Agreement, hereunder
and other like expressions as if the same referred to the Loan Agreement as
amended and supplemented by this Clause 5.1 of this Agreement.
 5.2
    
    Specific amendments to Loan Agreement.With effect on and from the Conditions
Satisfaction Date the Loan Agreement shall be, and shall be deemed by this Agreement to
be, amended as follows:
 (a)
    
    by adding at the end of the definition of Mortgage the words ,as amended
by the Mortgage Addendum;
 3




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(b)
    
    by deleting the definition of Required Security Amount and replacing it
with:Required Security Amount means the amount in USD (as certified by the Lender)
which is, at any relevant time (i) up to 30 September 2010 one hundred and five per
cent (105%) of the Loan and (ii) thereafter one hundred and twenty five per cent
(125%) of the Loan; and(c)
    
    by construing references throughout to this Agreement, hereunder and
other like expressions as if the same referred to the Loan Agreement as amended
and supplemented by this Clause 5.2 of this Agreement.
 5.3
    
    Amendments to Security Documents.With effect on and from the date hereof each of the Security
Documents other than the Loan Agreement, shall be, and shall be deemed by this Agreement to be,
amended as follows:
 (a)
    
    the definition of, and references throughout each of the Security Documents to, the Loan
Agreement and any of the other Security Documents shall be construed as if the same referred
to the Loan Agreement and those Security Documents as amended and supplemented by this
Agreement;(b)
    
    by construing references throughout each of the Security
Documents to this Agreement this
Deed, hereunderand other like expressions as if the-same-referred to such Security
Documents as amended and supplemented by this Agreement.
 5.4
    
    Security Documents to remain in full force and effect.The Security Documents shall remain in full
force and effect as amended and supplemented by:
 (a)
    
    the amendments to the Security Documents contained or referred to in Clauses 5.1 and 5.2; and(b)
    
    such further or consequential modifications as may be necessary to give full effect to the
terms of this Agreement,
 6
    
    FURTHER ASSURANCES
 6.1
    
    Borrowers obligation to execute further documents etc.The Borrower shall, and shall procure that
any other party to any Security Document shall:
 (a)
    
    execute and deliver to the Lender (or as it may direct) any assignment, mortgage, power of
attorney, proxy or other document, governed by the law of England or such other country as the
Lender may, in any particular case, specify,(b)
    
    effect any registration or notarisation, give any notice or take any other step, which the
Lender may, by notice to the Borrower or other party, specify for any of the purposes
described in Clause 6.2 or for any similar or related purpose.
 6.2
    
    Purposes of further assurances.Those purposes are:
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(a)
    
    validly and effectively to create any Security Interest or right of any kind which
the Lender intended should be created by or pursuant to the Loan Agreement or any
other Security Document, each as amended and supplemented by this Agreement; and(b)
    
    implementing the terms and provisions of this Agreement.
 6.3
    
    Terms of further assurances. The Lender may specify the terms of any document to be executed
by the Borrower or any other party under Clause 6.1, and those terms may include any
covenants, powers and provisions which the Lender considers appropriate to protect its
interests.
 6.4
    
    Obligation to comply with notice. The Borrower shall comply with a notice under Clause 6.1
by the date specified in the notice.
 6.5
    
    Additional corporate action. At the same time as the Borrower or any other party delivers
to the Lender any document executed under Clause 6.1(a), the Borrower or such other party
shall also deliver to the Lender a certificate signed by 1 of the Borrowers or that other
partys directors which shall:
 (a)
    
    set out the text of a resolution of the Borrowers or that other partys
directors specifically authorising the execution of the document specified by the
Lender, and(b)
    
    state that either the resolution was duly passed at a meeting of the
directors validly convened and held throughout which a quorum of directors entitled
to vote on the resolution was present or that the resolution has been signed by all
the directors and is valid under the Borrowers or that other partys articles of
association or other constitutional documents.
 7
    
    FEES AND EXPENSES
 7.1
    
    Expenses The provisions of Clause 5 (Fees and expenses) of the Loan Agreement shall apply to
this Agreement as if they were expressly incorporated in this Agreement with any necessary
modifications.
 7.2
    
    Fee. The Borrower shall pay to the Lender, on the date of this Agreement, an
arrangement fee of USD25,000.
 8
    
    NOTICES
 8.1
    
    General. The provisions of Clause 16 (Notices and other matters) of the Loan
Agreement, as amended and supplemented by this Agreement, shall apply to this Agreement as
if they were expressly incorporated in this Agreement with any necessary modifications.
 9
    
    SUPPLEMENTAL
 9.1
    
    Counterparts. This Agreement may be executed in any number of counterparts.
 
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9.2
    
    Third party rights. A person who is not a party to this Agreement has no right under
the Contracts (Rights of Third Parties) Act 1999 to enforce or to enjoy the benefit of any
term of this Agreement.
 10
    
    LAW AND JURISDICTION
 10.1
    
    Governing law. This Agreement shall be governed by and construed in accordance with English
law.
 10.2
    
    Incorporation of the Loan Agreement provisions. The provisions of Clause 18 (Governing
Law and Jurisdiction) of the Loan Agreement, as amended and supplemented by
this Agreement, shall apply to this Agreement as if they were expressly incorporated in this
Agreement with any necessary modifications.
 IN WITNESS
 
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COUNTERSIGNED
 
 
 7