13G Filing: Aisling Capital IV, LP and GTx Inc (GTXI)

CUSIP No.  40052B 20 7

Page 7 of 12

ITEM 1.

(a)

Name of Issuer:

GTx, Inc. (the “Issuer”)

(b)

Address of Issuer’s Principal Executive Offices:

175 Toyota Plaza, 7th Floor, Memphis, Tennessee 38103

ITEM 2.

(a)

Name of Person Filing:

This Schedule 13G (this “Statement”) is being filed by the following persons (collectively, the “Reporting Persons”):

(i)

Aisling Capital IV, LP, a Delaware limited partnership (“Aisling”);

(ii)

Aisling Capital Partners IV, LP, a Delaware limited partnership (“Aisling Partners”), a general partner of Aisling;

(iii)

Aisling Capital Partners IV LLC, a Delaware limited liability company (“Aisling Partners GP”), a general partner of Aisling Partners;

(iv)

Mr. Steve Elms, a managing member of Aisling Partners GP;

(v)

Mr. Andrew Schiff, a managing member of Aisling Partners GP.

(b)

Address of Principal Business Office, or if None, Residence:

The address of the principal business offices of each of the Reporting Persons is 888 Seventh Avenue, 12th Floor, New York, New York 10106.

(c)

Citizenship:

(i)        Aisling – a Delaware limited partnership

(ii)       Aisling Partners – a Delaware limited partnership

(iii)      Aisling Partners GP – a Delaware limited liability company

(iv)      Mr. Elms – United States

(v)       Mr. Schiff – United States

(d)

Title of Class of Securities:

Common Stock, par value $0.001 per share (the “Common Stock”).

(e)

CUSIP Number:

40052B 20 7

ITEM 3.

IF THIS STATEMENT IS FILED PURSUANT TO §240.13D-1(B) OR 240.13D-2(B) OR (C), CHECK WHETHER THE PERSON FILING IS A:

(a)

[__]  Broker or dealer registered under Section 15 of the Act (15 U.S.C. 78o)

(b)

[__]  Bank as defined in Section 3(a)(6) of the Act (15 U.S.C. 78c)

(c)

[__]  Insurance company as defined in Section 3(a)(19) of the Act (15 U.S.C. 78c)

(d)

[__]  Investment company registered under Section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8)

(e)

[__]  An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E)

(f)

[__]  An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);

(g)

[__]  A Parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G);

(h)

[__]  A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813)

(i)

[__]  A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3)

(j)

[__]  A non-U.S. institution in accordance with §240.13d-1(b)(1)(ii)(J);

(k)

[__]  Group, in accordance with §240.13d-1(b)(1)(ii)(J).