SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* Baxalta GmbH (Last) (First) (Middle) THURGAUERSTRASSE 130 (Street) GLATTPARK (OPFIKON) V8 8152 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 05/06/2015	3. Issuer Name and Ticker or Trading Symbol Onconova Therapeutics, Inc. [ ONTX ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	2,603,295	D(1)(2)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person* Baxalta GmbH (Last) (First) (Middle) THURGAUERSTRASSE 130 (Street) GLATTPARK (OPFIKON) V8 8152 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Baxalta Inc (Last) (First) (Middle) ONE BAXTER PARKWAY, DF2-1W (Street) DEERFIELD IL 60015 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. In preparation for the anticipated spin-off by Baxter International Inc. ("Baxter") of Baxalta Incorporated ("Baxalta"), the reported securities were transferred from Baxter Healthcare SA, an indirectly wholly-owned subsidiary of Baxter to its affiliate Baxalta GmbH, which is also an indirect wholly-owned subsidiary of Baxter. In preparation for the anticipated spin-off, Baxter and Baxalta are engaging in a series of reorganization transactions, including the transfer of reported shares, which are anticipated to result in Baxalta GmbH becoming an indirect wholly-owned subsidiary of Baxalta.

2. The reported securities are beneficially owned by Baxalta GmbH and may be deemed to be or become indirectly beneficially owned by Baxalta as a result of the reorganization transactions in preparation for the anticipated spin-off.

Remarks:

	/s/ Stephanie D. Miller, on behalf of Baxalta GmbH	05/08/2015
	/s/ Stephanie D. Miller, on behalf of Baxalta Incorporated	05/08/2015
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
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