UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                   FORM 10-QSB

(Mark One)

|X|   Quarterly report under Section 13 or 15(d) of the Securities Exchange Act
      of 1934

      For the quarterly period ended March 31, 2005

|_|   Transition report under Section 13 or 15(d) of the Exchange Act

      For the transition period from _____________ to _____________

                        Commission File Number 000-50682

                     Tremisis Energy Acquisition Corporation
        -----------------------------------------------------------------
        (Exact Name of Small Business Issuer as Specified in Its Charter)

            Delaware                                             20-0700684
(State or other Jurisdiction of                               (I.R.S. Employer
 Incorporation or Organization)                              Identification No.)

               1775 Broadway, Suite 604, New York, New York 10019
               --------------------------------------------------
                     (Address of Principal Executive Office)

                                 (212) 397-1464
                ------------------------------------------------
                (Issuer's Telephone Number, Including Area Code)

      Check whether the issuer (1) filed all reports required to be filed by
Section 13 or 15(d) of the Exchange Act during the past 12 months (or for such
shorter period that the registrant was required to file such reports), and (2)
has been subject to such filing requirements for the past 90 days. Yes |X| No
|_| |_|

      As of May 16, 7,700,000 shares of common stock, par value $.0001 per
share, were issued and outstanding.

      Transitional Small Business Disclosure Format (check one): Yes |_| No |X|



                                                                            Page
                                                                            ----

Page
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Part I: Financial Information:

      Item I - Financial Statements (Unaudited):

            Balance Sheet                                                      3

            Statements of Operations                                           4

            Statements of Stockholders' Equity                                 5

            Statements of Cash Flows                                           6

            Notes to Financial Statements                                   7-10

      Item 2 - Management's Discussion and Analysis or Plan of Operation      11

      Item 3 - Controls and Procedures                                        12

Part II. Other Information

      Item  2 - Changes in Securities and Small Business Issuer Purchases of
            Equity Securities Controls and Procedures                         13

      Item  6 - Exhibits and Reports on Form 10Q                              13

Signatures                                                                    14


                                       2


                                         Tremisis Energy Acquisition Corporation
                                        (a corporation in the development stage)

                                                       Balance Sheet (Unaudited)
================================================================================



                                                                     March 31,     December 31,
                                                                       2005            2004
----------------------------------------------------------------------------------------------

ASSETS

                                                                             
Current assets:
     Cash and cash equivalents                                      $   722,229    $   834,094
     U.S. Government Securities held in Trust Fund (Note 2)          33,619,888     33,351,358
     Accrued interest receivable held in Trust Fund (Note 2)              3,248         91,170
     Prepaid expenses                                                     7,375         22,125
                                                                    -----------    -----------
         Total Current assets                                        34,352,740     34,298,747
                                                                    -----------    -----------

Deferred Acquisition Costs (Note 4)                                      15,000             --
Furniture and equipment (net accumulated depreciation of
  $1,999 and $1,418)                                                      8,865          6,558
----------------------------------------------------------------------------------------------

          Total assets                                              $34,376,605    $34,305,305
==============================================================================================

LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
        Accrued expenses                                            $    96,797    $    26,680
        Taxes Payable                                                     8,300         26,000
                                                                    -----------    -----------
           Total current liabilities                                    105,097         52,680
----------------------------------------------------------------------------------------------

Common stock, subject to possible conversion
    1,264,368 shares at conversion value (Note 2)                     6,448,277      6,448,277

Commitment (Note 5)

Stockholders' equity (Notes 2, 3, 6 and 7)
        Preferred stock, $.0001 par value, authorized
            1,000,000 shares; none issued
        Common stock, $.0001 par value
            Authorized 30,000,000 shares; Issued and outstanding
            7,700,000 shares (which includes 1,264,368 subject to
            possible conversion)                                            770            770
        Additional paid-in capital                                   27,739,053     27,739,053
        Earnings accumulated during the development stage                83,408         64,525
----------------------------------------------------------------------------------------------

          Total stockholders' equity                                 27,823,231     27,804,348
----------------------------------------------------------------------------------------------

Total liabilities and stockholders' equity                          $34,376,605    $34,305,305
==============================================================================================
                                                  See Notes to Unaudited Financial Statements.



                                       3


                                         Tremisis Energy Acquisition Corporation
                                        (a corporation in the development stage)

                                             Statement of Operations (Unaudited)
================================================================================

                                                     For the        For the
                                                     Three          Period from
                                                     Months         February 5,
                                                     Ended          2004
                                                     March 31,      (inception)
                                                     2005           to March 31,
                                                                    2005
--------------------------------------------------------------------------------
Expenses:
     General and administrative expenses (Note 5)  $   131,214      $ 295,606
                                                   -----------      ---------
     Operating Loss                                   (131,214)      (295,606)

Interest Income                                        183,397        491,429
                                                   -----------      ---------
Income before provision for taxes                       52,183        195,823
                                                   -----------      ---------
Provision for taxes (Note 8)                           (33,300)      (112,415)
                                                   -----------      ---------
Net income                                         $    18,883      $  83,408
                                                   -----------      ---------
Basic and diluted net income per share             $       -0-

  Weighted average common shares outstanding         7,700,000
================================================================================
                                     See Notes to Unaudited Financial Statements


                                       4


                                         Tremisis Energy Acquisition Corporation
                                        (a corporation in the development stage)

                                   Statement of Stockholders' Equity (Unaudited)
================================================================================



                                                                                    Earnings
                                                                                   Accumulated
                                               Common Stock                        During the
                                           -------------------    Addition paid-   Development
                                            Shares      Amount       in cap           Stage         Total
                                           ------------------------------------------------------------------
                                                                                       
Balance, February 5, 2004 (inception)             --     $--              $--           $--              $--

Issuance of common stock to initial
   stockholders                            1,375,000     137           24,863            --           25,000

Sale of 6,325,000 units and
   underwriters' option, net of
   underwriters' discount and offering
   expenses (includes 1,264,368
   shares subject to possible
   conversion)                             6,325,000     633       27,714,190            --       27,714,823

Net income for the period                         --      --               --        64,525           64,525
                                           -----------------------------------------------------------------

Balance, December 31, 2004                 7,700,000     770       27,739,053        64,525       27,804,348

Net income for the three months
   ended March 31, 2005 (unaudited)               --      --               --        18,883           18,883
                                           ---------    ----      -----------       -------      -----------

Balance, March 31, 2005 (unaudited)        7,700,000    $770      $27,739,053       $83,408      $27,823,231
                                           ---------    ----      -----------       -------      -----------
                                          ==================================================================
                                                                 See Notes to Unaudited Financial Statements.



                                       5


                                         Tremisis Energy Acquisition Corporation
                                        (a corporation in the development stage)

                                             Statement of Cash Flows (Unaudited)
================================================================================



                                                                    For the Three     For the period from
                                                                     Months Ended        February 5, 2004
                                                                        March 31,    (inception) to March
                                                                             2005                31, 2005
---------------------------------------------------------------------------------------------------------

                                                                                       
Cash flows from operating activities
     Net income for the period                                       $     18,883            $     83,408
       Adjustments to reconcile net income to net cash used in
       operating activities:
          Depreciation                                                        580                   1,999
        Gain on maturity of U.S. Government Securities held in
            Trust Fund                                                   (270,890)               (480,531)
        Change in operating assets and liabilities:
        Decrease (increase) in prepaid expenses                            14,750                  (7,375)
        Decrease in accrued interest receivable                            91,170                      --
        Increase in accrued expenses                                       70,117                  96,797
        (Decrease) increase in income tax payable                         (17,700)                  8,300
                                                                     ------------            ------------
            Net cash used in operating activities                         (93,090)               (297,402)
                                                                     ------------            ------------

Cash flows from investing activities
        Purchases of U.S. Government Securities held in Trust Fund    (33,619,888)           (100,112,605)
        Maturity of U.S. Government Securities held in Trust Fund      33,619,000              66,970,000
        Increase in deferred acquisition costs                            (15,000)                (15,000)
        Purchase of furniture and equipment                                (2,887)                (10,864)
                                                                     ------------            ------------
           Net cash used in investing activities                          (18,775)            (33,168,469)
                                                                     ------------            ------------

Cash flows from financing activities
       Proceeds from public offering of 6,325,000 units
           and underwriter option, net                                        --               34,163,100
       Proceeds from issuance of common stock to initial
           Stockholders                                                       --                   25,000
       Proceeds from note payable, stockholder                                --                   77,500
       Repayment of note payable, stockholder                                 --                  (77,500)
                                                                     ------------            ------------
             Net cash provided by financing activities                        --               34,188,100
                                                                     ------------            ------------

Net (decrease) increase in cash and cash equivalents                 $   (111,865)           $    722,229
Cash and cash equivalent at beginning of period                           834,094                      --
                                                                     ------------            ------------
        Cash and cash equivalents at end of period                   $    722,229            $    722,229
                                                                     ------------            ------------

Supplemental disclosure of cash flow information:
        Cash paid during the period for income taxes                 $     51,000            $    104,115
=========================================================================================================
                                                             See Notes to Unaudited Financial Statements.



                                       6


                                         Tremisis Energy Acquisition Corporation
                                        (a corporation in the development stage)

                                         Notes to Unaudited Financial Statements
================================================================================

1. Basis of Presentation      The accompanying financial statements are
                              unaudited and have been prepared in accordance
                              with accounting principles generally accepted in
                              the United States of America for interim financial
                              information and with instructions to Form 10-QSB.
                              Accordingly, certain information and footnote
                              disclosures normally included in financial
                              statements prepared in accordance with accounting
                              principles generally accepted in the United States
                              of America have been omitted pursuant to such
                              rules and regulations. These financial statements
                              should be read in conjunction with the financial
                              statements that were included in the Company's
                              Annual Report on Form 10-KSB for the period ended
                              December 31, 2004.

                              In the opinion of management, all adjustments
                              (consisting of normal accruals) have been made
                              that are necessary to present fairly the financial
                              position of Tremisis Energy Acquisition
                              Corporation (the "Company") as of March 31, 2005
                              and the results of its operations and its cash
                              flow for the three month period ended March 31,
                              2005 and from February 5, 2005 (inception) to
                              March 31, 2005. Operating results for the interim
                              period presented are not necessarily indicative of
                              the results to be expected for a full year.

2. Organization and           The Company was incorporated in February 5, 2004
   Business Operations        as a blank check company whose objective is to
                              acquire an operating business in either the energy
                              or the environmental industry and their related
                              infrastructures.

                              The registration statement for the Company's
                              initial public offering ("Offering") was declared
                              effective May 13, 2004. The Company consummated
                              the offering on May 18, 2004 and received net
                              proceeds of approximately $34,163,100 (Note 3).
                              The Company's management has broad discretion with
                              respect to the specific application of the net
                              proceeds of this Offering, although substantially
                              all of the net proceeds of this Offering are
                              intended to be generally applied toward
                              consummating a business combination with an
                              operating business in the energy and environmental
                              industry and their related infrastructures
                              ("Business Combination"). An amount of
                              approximately $33,623,136 of the net proceeds is
                              being held in an interest-bearing trust account
                              ("Trust Fund") until the earlier of (i) the
                              consummation of its first Business Combination or
                              (ii) liquidation of the Company. Under the
                              agreement governing the Trust Fund, funds will
                              only be invested in United States government
                              securities (Treasury Bills) with a maturity of 180
                              days or less. The remaining net proceeds may be
                              used to pay for business, legal and accounting due
                              diligence on prospective acquisitions and
                              continuing general and administrative expenses.


                                       7


                                         Tremisis Energy Acquisition Corporation
                                        (a corporation in the development stage)

                                         Notes to Unaudited Financial Statements
================================================================================

                              The Company, after signing a definitive agreement
                              for the acquisition of a target business, will
                              submit such transaction for stockholder approval.
                              In the event that stockholders owning 20% or more
                              of the shares sold in the Offering, vote against
                              the Business Combination and exercise the
                              conversion rights described below, the Business
                              Combination will not be consummated. All of the
                              Company's stockholders prior to the Offering,
                              including all of the officers and directors of the
                              Company ("Initial Stockholders"), have agreed to
                              vote their 1,375,000 founding shares of common
                              stock in accordance with the vote of the majority
                              in interest of all other stockholders of the
                              Company ("Public Stockholders") with respect to
                              the Business Combination. After consummation of
                              the Business Combination, all of these voting
                              safeguards will no longer be applicable.

                              With respect to a Business Combination which is
                              approved and consummated, any Public Stockholder
                              who voted against the Business Combination may
                              demand that the Company convert his or her shares.
                              The per share conversion price will equal the
                              amount in the Trust Fund as of the record date for
                              determination of stockholders entitled to vote on
                              the Business Combination divided by the number of
                              shares of common stock held by Public Stockholders
                              at the consummation of the Offering. Accordingly,
                              Public Stockholders holding 19.99% of the
                              aggregate number of shares owned by all Public
                              Stockholders may seek conversion of their shares
                              in the event of a Business Combination. Such
                              Public Stockholders are entitled to receive their
                              per share interest in the Trust Fund computed
                              without regard to the shares held by Initial
                              Stockholders. In this respect, $6,448,277 has been
                              classified as common stock subject to possible
                              conversion The Company's Certificate of
                              Incorporation provides for mandatory liquidation
                              of the Company in the event that the Company does
                              not consummate a Business Combination within 18
                              months from the date of the consummation of the
                              Offering (such date would be November 18, 2005),
                              or 24 months from the consummation of the Offering
                              if certain extension criteria have been satisfied.
                              In the event of liquidation, it is likely that the
                              per share value of the residual assets remaining
                              available for distribution (including Trust Fund
                              assets) will be less than the initial public
                              offering price per share in the Offering (assuming
                              no value is attributed to the Warrants contained
                              in the Units sold in the Offering discussed in
                              Note 3).


                                       8


                                         Tremisis Energy Acquisition Corporation
                                        (a corporation in the development stage)

                                         Notes to Unaudited Financial Statements
================================================================================

3. Offering                   On May 18, 2004, the Company sold 6,325,000 units
                              ("Units") in the Offering including an additional
                              825,000 Units pursuant to the underwriters'
                              over-allotment option. Each Unit consists of one
                              share of the Company's common stock, $.0001 par
                              value, and two Redeemable Common Stock Purchase
                              Warrants ("Warrants"). Each Warrant will entitle
                              the holder to purchase from the Company one share
                              of common stock at an exercise price of $5.00
                              commencing the later of the completion of a
                              Business Combination with a target business or one
                              year from the effective date of the Offering and
                              expiring five years from the date of the
                              prospectus. The Warrants will be redeemable at a
                              price of $.01 per Warrant upon 30 days' notice
                              after the Warrants become exercisable, only in the
                              event that the last sale price of the common stock
                              is at least $8.50 per share for any 20 trading
                              days within a 30 trading day period ending on the
                              third day prior to the date on which notice of
                              redemption is given. In connection with this
                              Offering, the Company issued, for $100, an option
                              to the representative of the underwriters to
                              purchase 275,000 Units at an exercise price of
                              $9.90 per Unit. In addition, the warrants
                              underlying such Units are exercisable at $6.25 per
                              share.

4. Deferred Acquisition       During the three months ended March 31, 2005,
   Costs                      consulting fees of $15,000 have been incurred with
                              respect to a potential business combination.

5. Commitment                 The Company presently occupies office space
                              provided by an affiliate of an initial
                              stockholder. Such affiliate has agreed that, until
                              the acquisition of a target business by the
                              Company, it will make such office space, as well
                              as certain office and secretarial services
                              available to the Company, as may be required by
                              the Company from time to time. The Company pays
                              such affiliate $3,500 per month for such services
                              commencing on May 18, 2004, the effective date of
                              the Offering and $10,500 for the three month
                              period ended March 31, 2005 and $38,500 for the
                              period from February 5, 2004 (inception) to March
                              31, 2005 is included in general and administrative
                              expenses for such services.

6. Preferred Stock            The Company is authorized to issue 1,000,000
                              shares of preferred stock with such designations,
                              voting and other rights and preferences as may be
                              determined from time to time by the Board of
                              Directors.


                                       9


                                         Tremisis Energy Acquisition Corporation
                                        (a corporation in the development stage)

                                         Notes to Unaudited Financial Statements
================================================================================

7. Common Stock               The Company's Board of Directors authorized a
                              1.666666 to one forward stock split of its common
                              stock on March 10, 2004, a 1.1428571 to one
                              forward stock split of its common stock on April
                              16, 2004 and a 1.375 to one forward stock split of
                              its common stock on April 23, 2004. All references
                              in the accompanying financial statements to the
                              numbers of shares have been retroactively restated
                              to reflect the transactions.

                              As of March 31, 2005, 13,475,000 shares of common
                              stock were reserved for issuance upon exercise of
                              redeemable warrants and underwriters' unit
                              purchase option.

8. Provision for Taxes        Provision for taxes consists of:

                                                                    For the
                                                                  Period from
                                                For the Three   February 5, 2005
                                                 Months ended    (inception) to
                                                March 31, 2005   March 31, 2005
                                                --------------   --------------

                              Current
                              -------
                                 Federal           $10,500         $ 43,500
                                 State and local    22,800           68,915
                                                   -------         --------
                                                   $33,300         $112,415
                                                   =======         ========

                              The effective tax rate exceeds statutory rates
                              primarily due to state and local taxes which are
                              calculated as a percentage of capital.


                                       10


ITEM 2 - MANAGEMENT'S DISCUSSION AND ANALYSIS OR PLAN OF OPERATION

The following discussion should be read in conjunction with the Company's
Consolidated Financial Statements and footnotes thereto contained in this
report.

Forward Looking Statements

      The statements discussed in this Report include forward looking statements
that involve risks and uncertainties, including the timely delivery and
acceptance of the Company's products and the other risks detailed from time to
time in the Company's reports filed with the Securities and Exchange Commission.

Plan of Operations

      We were formed on February 5, 2004 to serve as a vehicle to effect a
merger, capital stock exchange, asset acquisition or other similar business
combination with a company in the either of the energy or environmental
industries and their related infrastructures. We intend to utilize cash derived
from the proceeds of our recently completed public offering, our capital stock,
debt or a combination of cash, capital stock and debt, in effecting a business
combination.

      Net income for the three months ended March 31, 2005 consisted of interest
income of $183,397 reduced by $10,500 for a monthly administrative services
agreement, $37,979 for professional fees, $14,750 for officer liability
insurance, $54,655 for travel expenses, $7,494 for franchise fees, $33,300 for
taxes and $5,836 for other expenses.

      Net income for the period from February 5, 2004 (inception) to March 31,
2005 consisted of interest income of $491,429 reduced by $38,500 for a monthly
administrative services agreement, $57,465 for professional fees, $51,625 for
officer liability insurance, $60,084 for travel expenses, $30,494 for franchise
fees, $112,415 for taxes and $57,438 for other expenses.

      We consummated our initial public offering on May 18, 2004. Gross proceeds
from our initial public offering, including the full exercise of the
underwriters' over-allotment option, were $37,950,100. After deducting offering
expenses of $1,510,000 including $990,000 evidencing the underwriters'
non-accountable expense allowance of 3% of the gross proceeds, and underwriting
discounts of $2,277,000, net proceeds were $34,163,100. Of this amount,
$33,623,136 (which includes accrued interest of $3,248) is held in trust and the
remaining proceeds are available to be used to provide for business, legal and
accounting due diligence on prospective acquisitions and continuing general and
administrative expenses. We will use substantially all of the net proceeds of
this offering to acquire a target business, including identifying and evaluating
prospective acquisition candidates, selecting the target business, and
structuring, negotiating and consummating the business combination. To the
extent that our capital stock is used in whole or in part as consideration to
effect a business combination, the proceeds held in the trust fund as well as
any other net proceeds not expended will be used to finance the operations of
the target business. We believe that we have sufficient available funds outside
of the trust fund to operate through May 18, 2006, assuming that a business
combination is not consummated during that time. Over this time period, we
anticipate approximately $180,000 of expenses for legal, accounting and other
expenses related to the due diligence investigations, structuring and
negotiating of a business combination, $84,000 for the administrative fee
payable to First Americas Management LLC ($3,500 per month for two years),
$50,000 of expenses for the due diligence and investigation of a target
business, $40,000 of expenses in legal and


                                       11


accounting fees relating to our SEC reporting obligations and $666,000 for
general working capital that will be used for miscellaneous expenses and
reserves, including approximately $60,000 for director and officer liability
insurance premiums. We do not believe we will need to raise additional funds
following this offering in order to meet the expenditures required for operating
our business. However, we may need to raise additional funds through a private
offering of debt or equity securities if such funds are required to consummate a
business combination that is presented to us. We would only consummate such a
fund raising simultaneously with the consummation of a business combination.

      We are obligated to pay to First Americas Management LLC, an affiliate of
Isaac Kier, our secretary, treasurer and a member of our board of directors, a
monthly fee of $3,500 for general and administrative services. Through March 31,
2005, an aggregate of $38,500 has been paid for such services. In addition, in
February and April 2004, Lawrence S. Coben, C.E.O. advanced an aggregate of
$77,500 to us, on a non-interest bearing basis, for payment of offering expenses
on our behalf. This amount was repaid in May 2004 out of proceeds of our initial
public offering.

ITEM 3. CONTROLS AND PROCEDURES.

      An evaluation of the effectiveness of our disclosure controls and
procedures as of March 31, 2005 was made under the supervision and with the
participation of our management, including the chief executive officer and
treasurer. Based on that evaluation, they concluded that our disclosure controls
and procedures are effective as of the end of the period covered by this report
to ensure that information required to be disclosed by us in reports that we
file or submit under the Securities Exchange Act of 1934 is recorded, processed,
summarized and reported within the time periods specified in Securities and
Exchange Commission rules and forms. During the most recently completed fiscal
quarter, there has been no significant change in our internal control over
financial reporting that has materially affected, or is reasonably likely to
materially affect, our internal control over financial reporting.


                                       12


                                    PART II.

                                OTHER INFORMATION

ITEM 2: CHANGES IN SECURITIES AND SMALL BUSINESS ISSUER PURCHASES OF EQUITY
SECURITIES

      On May 18, 2004, we closed our initial public offering of 6,325,000 Units,
including 825,000 Units issued upon exercise of the underwriters' over-allotment
option, with each unit consisting of one share of our common stock and two
warrants, each to purchase one share of our common stock at an exercise price of
$5.00 per share. The Units were sold at an offering price of $6.00 per Unit,
generating gross proceeds of 37,950,100. The representative of the underwriters
in the offering was EarlyBirdCapital, Inc. The securities sold in the offering
were registered under the Securities Act of 1933 on a registration statement on
Form S-1 (No. 333-113583). The Securities and Exchange Commission declared the
registration statement effective on May 12, 2004.

      We paid a total of $2,277,000 in underwriting discounts and commissions,
and $1,510,000 for costs and expenses related to the offering, including
$990,000 for the underwriters' non-accountable expense allowance of 3% of the
gross proceeds.

      After deducting the underwriting discounts and commissions and the
offering expenses, the total net proceeds to us from the offering were
$34,163,100, of which $33,143,000 was deposited into a trust fund and the
remaining proceeds are to be used to provide for business, legal and accounting
due diligence on prospective business combinations and continuing general and
administrative expenses. Through March 31, 2005, we have used approximately
$297,000 of cash for operating expenses and $77,500 to repay advances made to us
by one of our initial stockholders.

ITEM 6: EXHIBITS

      (a)   Exhibits:

            31.1  - Section 302 Certification by CEO

            31.2  - Section 302 Certification by Treasurer

            32.1  - Section 906 Certification by CEO

            32.2  - Section 906 Certification by Treasurer


                                       13


                                   SIGNATURES

      In accordance with the requirements of the Exchange Act, the registrant
caused this report to be signed on its behalf by the undersigned, thereunto duly
authorized.

                                                     TREMISIS ENERGY
                                                     ACQUISITION CORPORATION

Dated: May 16, 2005

                                                     /s/ Lawrence S. Coben
                                                     ---------------------------
                                                     Lawrence S. Coben
                                                     Chairman of the Board and
                                                     Chief Executive Officer

                                                     /s/ Isaac Kier
                                                     ---------------------------
                                                     Treasurer


                                       14