MATEON THERAPEUTICS INC Warrant Agreements

Form of Warrant (Filed With SEC on July 13, 2023)

Form of Mateon Warrant (Filed With SEC on March 26, 2021)

Form of Edgepoint Warrant (Filed With SEC on March 26, 2021)

Form of Mateon Warrant, dated August 7, 2020 (Filed With SEC on August 13, 2020)

Form of Edgepoint Warrant, dated August 7, 2020 (Filed With SEC on August 13, 2020)

Form of Mateon Warrant, dated July 23, 2020 (Filed With SEC on July 29, 2020)

Form of Edgepoint Warrant, dated July 23, 2020 (Filed With SEC on July 29, 2020)

Form of Placement Agent Purchase Warrant (Filed With SEC on June 13, 2018)

Form of Series B Warrant (Filed With SEC on April 16, 2018)

Form of Series A Warrant (Filed With SEC on April 16, 2018)

COMMON STOCK PURCHASE WARRANT MATEON THERAPEUTICS, INC. (Filed With SEC on June 13, 2017)

PLACEMENT AGENT COMMON STOCK PURCHASE WARRANT MATEON THERAPEUTICS, INC. (Filed With SEC on June 13, 2017)

PRE-FUNDED COMMON STOCK PURCHASE WARRANT MATEON THERAPEUTICS, INC. (Filed With SEC on June 13, 2017)

COMMON STOCK PURCHASE WARRANT OXIGENE, INC. (Filed With SEC on March 20, 2015)

COMMON STOCK PURCHASE WARRANT OXIGENE, INC. (Filed With SEC on May 23, 2014)

FORM OF COMMON STOCK PURCHASE WARRANT OXIGENE, INC. (Filed With SEC on September 20, 2013)

[Form of Placement Agent Warrant] (Filed With SEC on August 29, 2013)

STOCK PURCHASE WARRANT TO SUBSCRIBE FOR AND PURCHASE COMMON STOCK OF OXiGENE, INC. (Filed With SEC on August 8, 2013)

FORM OF SERIES [A/B] COMMON STOCK PURCHASE WARRANT OXIGENE, INC. (Filed With SEC on April 11, 2013)

FORMOF WARRANT EXCHANGE AGREEMENT (Filed With SEC on January 19, 2011)

FORM OF SERIES E WARRANT (Filed With SEC on January 19, 2011)

FORM OF SERIES D WARRANT (Filed With SEC on March 26, 2010)

FORM OF SERIES D WARRANT (Filed With SEC on March 11, 2010)

FORM OF SERIES C WARRANT (Filed With SEC on March 11, 2010)

FORM OF SERIES B WARRANT (Filed With SEC on March 11, 2010)

FORM OF SERIES A WARRANT (Filed With SEC on March 11, 2010)

Ex-4.2 Form of Short-Term Warrant issued to Investors (Filed With SEC on July 15, 2009)

Ex-4.1 Form of Five-Year Warrant issued to Investors (Filed With SEC on July 15, 2009)

Ex-10.3 Stock and Warrant Purchase Agreement dated as of October 1, 2008 (Filed With SEC on October 10, 2008)

Ex-4.1 Form of Direct Investment Warrant, to be dated as of October 17, 2008 (Filed With SEC on October 10, 2008)

Ex-4.1 Warrant for the purchase of shares of common stock, dated 2/19/2008 (Filed With SEC on February 21, 2008)