Whitehawk Therapeutics, Inc. Leases Disclosure

6. Operating Leases

In April 2019, the Company entered into a twenty-eight-month facility lease agreement for office space in Pacific Palisades, California (the “Pacific Palisades Lease”). The Pacific Palisades Lease commenced on May 1, 2019, included four months of rent abatement and a rent escalation clause and was set to expire on August 31, 2021. In August 2021, the Company exercised its option to extend the term of the Pacific Palisades Lease for an additional three-year period and entered into an amendment to the lease agreement (the “Pacific Palisades Lease Amendment”). Pursuant to the Pacific Palisades Lease Amendment, the Company and the landlord agreed to extend the term for an additional period of three (3) years and six (6) months, until February 28, 2025, with an option to renew for an additional three (3) years in accordance with the terms of the Pacific Palisades Lease. Included in the Pacific Palisades Lease Amendment were nine months of rent abatement and a rent escalation clause. The Pacific Palisades Lease expired on February 28, 2025.

In April 2022, the Company entered into a lease agreement for office space in Morristown, New Jersey (the “Morristown Lease”). The Morristown Lease has a term of seventy-three months, unless terminated sooner, and includes rent abatement for the first three months and the forty-seventh and forty-eighth calendar months after lease commencement. Included in the Morristown Lease are fixed rent escalations of approximately 2% on each anniversary year of the lease term. In connection with the FYARRO Divestiture, KAKEN assumed the Morristown Lease. In March 2025, the Company entered into a short-term sublease with KAKEN. The Company has elected the short-term lease exemption under ASC 842. As such, this lease is not recorded on the balance sheet. Lease payments made are recognized on a straight-line basis over the lease term in the income statement.