Page 1 of 11 Pages
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13D
Under the Securities Exchange Act of 1934
(Amendment No. 11)*
AMERICAN MOBILE SATELLITE CORPORATION
-----------------------------------------------------
(Name of Issuer)
COMMON
-----------------------------------------------------
(Title of Class of Securities)
02755R103
-----------------------------------------------------
(CUSIP Number)
Linda S. Martinson, Esq. (212) 583-2000
767 Fifth Avenue, 49th Floor, New York, NY 10153
-----------------------------------------------------
(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)
January 15,1999
-----------------------------------------------------
(Date of Event which Requires Filing of this Statement)
If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box [ ].
Check the following box if a fee is being paid with this statement [ ].
(A fee is not required only if the filing person: (1) has a previous statement
on file reporting beneficial ownership of more than five percent of the class
of securities described in Item 1; and (2) has filed no amendment subsequent
thereto reporting beneficial ownership of five percent or less of such class.)
(See Rule 13d-7.)
*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
disclosures provided in a prior cover page.
The information required on 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).
SEC 1746 (12-91)<PAGE>
<PAGE>
Amendment Number 11 to Schedule 13D (continued)
CUSIP No. 02755R103 Page 2 of 11 Pages
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Baron Capital Group, Inc.
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [ ]
(b) [ ]
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 SOURCE OF FUNDS
OO
- --------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED PURSUANT TO ITEMS
2(C) OR 2(E) [ ]
- --------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION
- --------------------------------------------------------------------------------
NUMBER OF 7 SOLE VOTING POWER
SHARES 1,309,800
BENEFICIALLY --------------------------------------------------------------
OWNED BY 8 SHARED VOTING POWER
EACH 4,825,300
REPORTING --------------------------------------------------------------
PERSON 9 SOLE DISPOSITIVE POWER
WITH 1,309,800
--------------------------------------------------------------
10 SHARED DISPOSITIVE POWER
4,825,300
- --------------------------------------------------------------------------------
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
6,135,100
- --------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
- --------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
15.9%
- --------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*
HC, CO
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT
<PAGE>
<PAGE>
Amendment Number 11 to Schedule 13D (continued)
CUSIP No. 02755R103 Page 3 of 11 Pages
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
BAMCO, Inc.
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [ ]
(b) [ ]
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 SOURCE OF FUNDS
OO
- --------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED PURSUANT TO ITEMS
2(C) OR 2(E) [ ]
- --------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION
- --------------------------------------------------------------------------------
NUMBER OF 7 SOLE VOTING POWER
SHARES
BENEFICIALLY --------------------------------------------------------------
OWNED BY 8 SHARED VOTING POWER
EACH 3,997,000
REPORTING --------------------------------------------------------------
PERSON 9 SOLE DISPOSITIVE POWER
WITH
--------------------------------------------------------------
10 SHARED DISPOSITIVE POWER
3,997,000
- --------------------------------------------------------------------------------
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
3,997,000
- --------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
- --------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
10.3%
- --------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*
IA, CO
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT
<PAGE>
<PAGE>
Amendment Number 11 to Schedule 13D (continued)
CUSIP No. 02755R103 Page 4 of 11 Pages
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Baron Capital Management, Inc.
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [ ]
(b) [ ]
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 SOURCE OF FUNDS
OO
- --------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED PURSUANT TO ITEMS
2(C) OR 2(E) [ ]
- --------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION
- --------------------------------------------------------------------------------
NUMBER OF 7 SOLE VOTING POWER
SHARES 1,309,800
BENEFICIALLY --------------------------------------------------------------
OWNED BY 8 SHARED VOTING POWER
EACH 828,300
REPORTING --------------------------------------------------------------
PERSON 9 SOLE DISPOSITIVE POWER
WITH 1,309,800
--------------------------------------------------------------
10 SHARED DISPOSITIVE POWER
828,300
- --------------------------------------------------------------------------------
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
2,138,100
- --------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
- --------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
5.5%
- --------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*
IA, CO
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT
<PAGE>
<PAGE>
Amendment Number 11 to Schedule 13D (continued)
CUSIP No. 02755R103 Page 5 of 11 Pages
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Baron Asset Fund
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [ ]
(b) [ ]
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 SOURCE OF FUNDS
OO
- --------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED PURSUANT TO ITEMS
2(C) OR 2(E) [ ]
- --------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION
- --------------------------------------------------------------------------------
NUMBER OF 7 SOLE VOTING POWER
SHARES
BENEFICIALLY --------------------------------------------------------------
OWNED BY 8 SHARED VOTING POWER
EACH 3,500,000
REPORTING --------------------------------------------------------------
PERSON 9 SOLE DISPOSITIVE POWER
WITH
--------------------------------------------------------------
10 SHARED DISPOSITIVE POWER
3,500,000
- --------------------------------------------------------------------------------
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
3,500,000
- --------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
- --------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
9.1%
- --------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*
IV, OO
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT
<PAGE>
<PAGE>
Amendment Number 11 to Schedule 13D (continued)
CUSIP No. 02755R103 Page 6 of 11 Pages
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Ronald Baron
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [ ]
(b) [ ]
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 SOURCE OF FUNDS
OO
- --------------------------------------------------------------------------------
5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDING IS REQUIRED PURSUANT TO ITEMS
2(C) OR 2(E) [ ]
- --------------------------------------------------------------------------------
6 CITIZENSHIP OR PLACE OF ORGANIZATION
USA
- --------------------------------------------------------------------------------
NUMBER OF 7 SOLE VOTING POWER
SHARES 1,338,983
BENEFICIALLY --------------------------------------------------------------
OWNED BY 8 SHARED VOTING POWER
EACH 4,825,300
REPORTING --------------------------------------------------------------
PERSON 9 SOLE DISPOSITIVE POWER
WITH 1,338,983
--------------------------------------------------------------
10 SHARED DISPOSITIVE POWER
4,825,300
- --------------------------------------------------------------------------------
11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
6,164,283
- --------------------------------------------------------------------------------
12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*
- --------------------------------------------------------------------------------
13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
16.0%
- --------------------------------------------------------------------------------
14 TYPE OF REPORTING PERSON*
IN
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT
<PAGE>
<PAGE>
Page 7 of 11 Pages
Item 1. Security and Issuer
(a) Name of Issuer:
American Mobile Satellite Corporation
(b) Address of Issuer's Principal Executive Offices:
10802 Parkridge Boulevard
Reston, VA 22091
(c) Title and Class of Securities:
Common
Item 2. Identity and Background
(a) Name:
Baron Capital Group, Inc. ('BCG')
BAMCO, Inc. ('BAMCO')
Baron Capital Management, Inc. ('BCM')
Baron Asset Fund ('BAF')
Ronald Baron
(b) Business Address:
767 Fifth Avenue
New York, NY 10153
(c) Present Principal Employment:
BCG: Holding company
BAMCO: Investment adviser
BCM: Investment adviser
BAF: Registered investment company
Ronald Baron: President: BCG, BAMCO, BCM; CEO OF BAF
767 Fifth Avenue
New York, NY 10153
(d) Record of Convictions:
No material change.
(e) Record of Civil Proceedings:
No material change.
(f) Citizenship:
No material change.
Item 3. Source and Amount of Funds or Other Consideration
No material change.
<PAGE>
<PAGE>
Page 8 of 11 Pages
Item 4. Purpose of Transaction
No material change.
Item 5. Interest in Securities of the Issuer*
(a) Amount and percentage beneficially owned#:
BCG: 6,135,100 15.9%
BAMCO: 3,997,000 10.3%
BCM: 2,138,100 5.5%
BAF: 3,500,000 9.1%
Ronald Baron: 6,164,283 16.0%
(b) Number of shares as to which such person has:
(i) sole power to vote or direct the vote:
BCG: 1,309,800
BAMCO: 0
BCM: 1,309,800
BAF: 0
Ronald Baron: 1,338,983
(ii) shared power to vote or direct the vote:
BCG: 4,825,300
BAMCO: 3,997,000
BCM: 828,300
BAF: 3,500,000
Ronald Baron: 4,825,300
(iii) sole power to dispose or to direct the disposition:
BCG: 1,309,800
BAMCO: 0
BCM: 1,309,800
BAF: 0
Ronald Baron: 1,309,800
(iv) shared power to dispose or direct the disposition:
BCG: 4,825,300
BAMCO: 3,997,000
BCM: 828,300
BAF: 3,500,000
Ronald Baron: 4,825,300
*Reporting Persons may be deemed to share power to vote and
dispose of shares referred to herein as a result of control
relationships (BCG and Ronald Baron with respect to all of
the shares; BAMCO with respect to the BAF shares) and
pursuant to investment advisory relationships with advisory
clients. Reporting Persons disclaim beneficial ownership of
the shares for which they share power.
(c) Not applicable.
<PAGE>
<PAGE>
Page 9 of 11 Pages
(d) Ownership of More than Five Percent on Behalf of Another Person:
No material change.
(e) Ownership of Less than Five Percent:
Not applicable.
Item 6. Contracts, Arrangements, Understandings or Relationships with
Respect to Securities of the Issuer
On January 15, 1999, BAF purchased from the Issuer a $21.5
million subordinated, non-recourse, note which is
exchangeable into shares of XM Satellite Radio Holdings, Inc.,
a subsidiary of the Issuer, after January 15, 2000.
Item 7. Material to be Filed as Exhibits
Not applicable.
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: January 20, 1999
Baron Capital Group, Inc., BAMCO, Inc.,
Baron Capital Management, Inc. and
Baron Assert Fund
By:
/s/ Ronald Baron
_______________________________________
Ronald Baron, President
Ronald Baron, Individually
By:
/s/ Ronald Baron
_______________________________________
Ronald Baron
