Traws Pharma, Inc. — Director's Dealing 2016

May 20, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Onconova Therapeutics, Inc. (ONTX)
CIK: 0001130598
Period of Report: 2016-05-18

Reporting Person: STOVER JACK E (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-05-18	Stock Option (right to purchase)	$0.52	A	10000	Acquired	2026-05-18	Common Stock (10000)	Direct
2016-05-18	Stock Option (right to purchase)	$0.52	A	20000	Acquired	2026-05-18	Common Stock (20000)	Direct

Footnotes

F1: These options vest over one year in 12 equal monthly installments.

F2: These options vest annually over a 3 year-period: 33% on May 18, 2017, 33% on May 18,2018 and 34% on May 18, 2019.