UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                             _____________________


                                    FORM 8-K

              CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

         DATE OF REPORT (Date of earliest reported event): MAY 11, 2005

                               MOTIENT CORPORATION
               (Exact Name of Registrant as Specified in Charter)



         DELAWARE                      0-23044                  93-0976127
(State or Other Jurisdiction of      (Commission               (IRS Employer
       Incorporation)                File Number)            Identification No.)

     300 KNIGHTSBRIDGE PKWY.
        LINCOLNSHIRE, IL                                            60069
      (Address of Principal                                       (Zip Code)
       Executive Offices)

        Registrant's telephone number, including area code: 847-478-4200

         Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registration under any of
the following provisions (SEE General Instruction A.2. below):

         |_|      Written communications pursuant to Rule 425 under the
                  Securities Act (17 CFR 230.425)

         |_|      Soliciting material pursuant to Rule 14a-12 under the Exchange
                  Act (17 CFR 240.14a-12)

         |_|      Pre-commencement communications pursuant to Rule 14d-2(b)
                  under the Exchange Act (17 CFR 240.14d-2(b))

         |_|      Pre-commencement communications pursuant to Rule 13e-4(c)
                  under the Exchange Act (17 CFR 240.13e-4(c))







                           FORWARD-LOOKING STATEMENTS

This Report on Form 8-K contains forward-looking statements within the meaning
of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the
Securities Exchange Act of 1934, as amended. All statements regarding our
expected financial position and operating results, our business strategy, and
our financing plans are forward-looking statements. These statements can
sometimes be identified by our use of forward-looking words such as "may,"
"will," "anticipate," "estimate," "expect," "project," or "intend." These
forward-looking statements reflect our plans, expectations, and beliefs and,
accordingly, are subject to certain risks and uncertainties. We cannot guarantee
that any of such forward-looking statements will be realized.

Statements regarding factors that may cause actual results to differ materially
from those contemplated by such forward-looking statements ("Cautionary
Statements") include, among others, those under the caption "Risk Factors" in
our annual report on Form 10-K for the year ended December 31, 2004, as amended.
All of our subsequent written and oral forward-looking statements (or statements
that may be attributed to us) are expressly qualified by the Cautionary
Statements. You should carefully review the risk factors described in our other
filings with the Securities and Exchange Commission (the "SEC") from time to
time.

Our forward-looking statements are based on information available to us today,
and we undertake no obligation to update these statements. Our actual results
may differ significantly from the results discussed.

ITEM 1.01 - ENTRY INTO A MATERIAL DEFINITIVE AGREEMENT

On May 11, 2005, Motient Ventures Holding Inc. ("MVH"), a wholly owned
subsidiary of Motient Corporation ("Motient"), purchased 8,190,008 shares of
common stock of TerreStar Networks Inc. ("TerreStar") from TerreStar for $200
million pursuant to a Purchase Agreement by and between MVH and TerreStar. As a
result of this purchase and as of May 11, 2005, Motient owns approximately 61%
of the issued and outstanding common stock of TerreStar. The Purchase Agreement
is filed as Exhibit 10.1 to this Form 8-K.

In connection with the purchase of shares of common stock of TerreStar, Motient
and/or MVH also entered into the following agreements, each dated May 11, 2005:

A Conditional Waiver and Consent Agreement by and among Motient, MVH and the
other limited partners of Mobile Satellite Ventures LP ("MSV"), pursuant to
which, subject to the satisfaction of certain conditions, Motient and MVH have
consented to a roll-up of the MSV interests held by some or all of the other
limited partners of MSV. The terms of such a roll-up have yet to be negotiated,
but, if it were to occur, a single entity may control a majority interest in
MSV. In such event, Motient would be entitled to the benefit of a number of
minority protection provisions with respect to MSV. The Conditional Waiver and
Consent Agreement is filed as Exhibit 10.2 to this Form 8-K.

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A Stockholders' Agreement by and among the stockholders of TerreStar, pursuant
to which MVH has the right to designate four of the seven members of the Board
of Directors of TerreStar (one of whom must be independent of TerreStar) and
contains certain minority protection provisions for the other TerreStar
stockholders, including tag-along and preemptive rights, as well as a drag-along
provision. The Stockholders Agreement is filed as Exhibit 10.3 to this Form 8-K.

ITEM 2.01 - COMPLETION OF ACQUISITION OR DISPOSITION OF ASSETS

On May 11, 2005, MVH purchased 8,190,008 shares of common stock of TerreStar
from TerreStar for $200 million pursuant to a Purchase Agreement by and between
MVH and TerreStar. As a result of this purchase and as of May 11, 2005, Motient
(through MVH) owns approximately 61% of the issued and outstanding common stock
of TerreStar. The funds used to purchase the shares of TerreStar common stock
represent a portion of the proceeds Motient raised from the private placement of
its Series A Cumulative Convertible Preferred Stock on April 15, 2005.

TerreStar was a wholly owned subsidiary of MSV established to, among other
things, develop business opportunities in the 2 GHz band. On May 11, 2005,
TerreStar was spun-off by MSV to its limited partners and, in connection with
that spin-off, Motient acquired ownership of approximately 49% of the issued and
outstanding shares of capital stock of TerreStar. The subsequent stock purchase
increased Motient's ownership to its current 61% level.

Following this acquisition, Christopher Downie, Motient's Executive Vice
President and Chief Operating Officer, and Jared E. Abbruzzese and Shawn
O'Donnell of CTA, Motient's Chief Restructuring Entity, will serve on the Board
of Directors of TerreStar.

TMI Communications and Company Limited Partnership ("TMI"), another stockholder
of TerreStar, holds an approval in principle issued by Industry Canada for a 2
GHz space station authorization and related spectrum licenses for the provision
of Mobile Satellite Service ("MSS"), in the 2 GHz band, as well as an
authorization from the FCC for the provision of MSS in the 2 GHz band. These
authorizations are subject to various milestones relating to the construction,
launch, and operational date of the system. TMI is obligated to transfer these
authorizations to TerreStar and/or an entity designated by TerreStar that is
eligible to hold the Canadian authorization, subject to obtaining the necessary
regulatory approvals.

ITEM 7.01 - REGULATION FD DISCLOSURE

Motient Corporation issued a press release, dated May 11, 2005, which is
attached hereto as Exhibit 99.1. This exhibit is furnished, not filed, pursuant
to Regulation FD.

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ITEM 9.01 - FINANCIAL STATEMENTS AND EXHIBITS

(a)         FINANCIAL STATEMENTS OF BUSINESSES ACQUIRED

Financial statements of TerreStar have not been included herein but are expected
to be included in an amendment to this Current Report on Form 8-K to be filed
not later than 71 days after the date that this Current Report on Form 8-K is
required to be filed.

(b)         PRO FORMA FINANCIAL INFORMATION

Pro forma financial information required pursuant to Article 11 of Regulation
S-X has not been included herein but is expected to be included in an amendment
to this Current Report on Form 8-K to be filed not later than 71 days after the
date that this Current Report on Form 8-K is required to be filed.

(c)         EXHIBITS

10.1        Purchase Agreement dated May 11, 2005 by and between Motient
            Ventures Holding Inc. and TerreStar Networks Inc.

10.2        Conditional Waiver and Consent Agreement dated May 11, 2005 by and
            among the Registrant and each other party listed on the signature
            page thereto

10.3        Stockholders Agreement dated May 11, 2005 by and among Motient
            Ventures Holding Inc. and the other parties thereto

99.1        Press release dated May 11, 2005


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                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                              MOTIENT CORPORATION



                                               By: /S/ Robert Macklin
                                                   -----------------------------
                                                   Robert Macklin
                                                   Secretary and General Counsel

Date:  May 11, 2005


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