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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
SCHEDULE 13G
(Rule 13d-102)
INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b)(c),
AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b)
(Amendment No. ______________)(1)
United Therapeutics Corporation
(Name of Issuer)
Common Stock, par value $.01 per share
(Title of Class of Securities)
91307C 10 2
(CUSIP Number)
December 31, 1999
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which Schedule is
filed:
[ ] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[X] Rule 13d-1(d)
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(1) 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 in the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities and
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).
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CUSIP NO. 91307C 10 2 13G PAGE 2 OF 6 PAGES
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<TABLE>
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<S> <C> <C>
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)
Martine A. Rothblatt
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2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ]
(b) [ ]
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3 SEC USE ONLY
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4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States of America
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5 SOLE VOTING POWER 1,210,594
NUMBER OF SHARES
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BENEFICIALLY 6 SHARED VOTING POWER 0
OWNED BY EACH
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REPORTING 7 SOLE DISPOSITIVE POWER 1,210,594
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PERSON WITH 8 SHARED DISPOSITIVE POWER 0
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9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,210,594
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10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES* [ ]
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11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
7.5%
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12 TYPE OF REPORTING PERSON*
IN
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</TABLE>
*SEE INSTRUCTIONS BEFORE FILLING OUT!
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CUSIP NO. 91307C 10 2 13G PAGE 3 OF 6 PAGES
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ITEM 1(a). NAME OF ISSUER:
United Therapeutics Corporation
ITEM 1(b). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
1110 Spring Street
Silver Spring, MD 20910
ITEM 2(a). NAME OF PERSON FILING:
Martine A. Rothblatt
ITEM 2(b). ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE:
1110 Spring Street
Silver Spring, MD 20910
ITEM 2(c). CITIZENSHIP:
United States of America
ITEM 2(d). TITLE OF CLASS OF SECURITIES:
This statement relates to the shares of common stock,
par value $0.01 per share (the "Common Stock"), of
United Therapeutics Corporation, a Delaware
corporation (the "Company").
ITEM 2(e). CUSIP NUMBER:
91307C 10 2
ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULES 13d-1(b),
OR 13d-2(b), CHECK WHETHER THE PERSON FILING IS A:
(a) [ ] Broker or dealer registered under
Section 15 of the Exchange Act.
(b) [ ] Bank as defined in Section 3(a)(6) of
the Exchange Act.
(c) [ ] Insurance company as defined in
Section 3(a)(19) of the Exchange Act.
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CUSIP NO. 91307C 10 2 13G PAGE 4 OF 6 PAGES
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(d) [ ] Investment company registered under
Section 8 of the Investment Company Act.
(e) [ ] An investment adviser in accordance
with Rule 13d-1(b)(1)(ii)(E);
(f) [ ] An employee benefit plan or endowment
fund in accordance with Rule 13d-1(b)(1)(ii)(F);
(g) [ ] A parent holding company or control
person in accordance with Rule 13d-1(b)(1)(ii)(G);
(h) [ ] A savings association as defined in
Section 3(b) of the Federal Deposit Insurance Act;
(i) [ ] A church plan that is excluded from
the definition of an investment company
under Section 3(c)(14) of the Investment
Company Act;
(j) [ ] Group, in accordance with Rule
13d-1(b)(1)(ii)(J).
If this statement is filed pursuant to Rule 13d-1(c),
check this box. [ ]
ITEM 4. OWNERSHIP.
(a) Amount beneficially owned:
1,210,594 shares, which included 17,776 shares held by
reporting person's children, 403,204 shares held by
reporting person's spouse (the beneficial ownership of
which the reporting person disclaims) and 26,667
shares that may be acquired upon exercise of certain
stock options.
(b) Percent of class:
7.5%
(c) Number of shares as to which such person had voting
power:
(i) Sole power to vote or to direct the vote: 1,210,594
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CUSIP NO. 91307C 10 2 13G PAGE 5 OF 6 PAGES
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<TABLE>
<CAPTION>
<S> <C>
(ii) Shared power to vote or to direct the vote: 0
(iii) Sole power to dispose or to direct the disposition of: 1,210,594
(iv) Shared power to dispose or to direct the disposition of: 0
</TABLE>
ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.
Not applicable.
ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.
Not applicable.
ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY
WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE
PARENT HOLDING COMPANY.
Not applicable.
ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.
Not applicable.
ITEM 9. NOTICE OF DISSOLUTION OF GROUP.
None.
ITEM 10. CERTIFICATION.
None required. Reporting person filed pursuant to Rule
13d-1(d).
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CUSIP NO. 91307C 10 2 13G PAGE 6 OF 6 PAGES
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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.
February 14, 2000
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/s/ Martine A. Rothblatt
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Martine A. Rothblatt
