General and administrative (G&A) expenses for the second quarter ended June 30, 2021 were $8.9 million, compared to $7.2 million for the same period in 2020. Total G&A expenses for the six months ended June 30, 2021 were $17.1 million, compared to $14.4 million for the same period in 2020. Increased G&A expenses for the second quarter and first six months of 2021 over amounts for the same periods in 2020 were primarily due to increased G&A staffing and spending on professional services.
Other income for the second quarter ended June 30, 2021 was $43.2 million, compared to $2.6 million in the same period in 2020. Other income for the six months ended June 30, 2021 was $56.3 million, compared to $3.3 million in the same period in 2020. Other income for the second quarter and first six months of 2021 includes realized gains on the sale of an investment equity security and an increase in unrealized gains on the Company’s marketable equity investments.
Non-cash, stock-based compensation expense for the six months ended June 30, 2021 was $17.6 million, compared to $14.7 million for same period in 2020.
Net income for the second quarter ended June 30, 2021 was $52.2 million, or $0.87 on a fully diluted per share basis, compared to net loss of $35.0 million, or $(0.61) on a fully diluted per share basis, for the same period in 2020. For the six months ended June 30, 2021, net income was $49.8 million, or $0.82 on a fully diluted per share basis, compared to net loss of $43.1 million, or $(0.76) on a fully diluted per share basis, for the same period in 2020. Net income reported for the second quarter ended June 30, 2021 and first six months of 2021, compared to the net loss reported for the same periods in 2020, were primarily due to higher collaboration, milestone and royalty revenues and other income in 2021 compared to 2020.
The total shares outstanding were 58,315,485 as of June 30, 2021, compared to 57,214,253 as of June 30, 2020.
Financial Guidance
Based on current operating plans, Xencor expects to have cash to fund research and development programs and operations into 2024. Xencor expects to end 2021 with between $475 million and $500 million in cash, cash equivalents and marketable securities.
Conference Call and Webcast
Xencor will host a conference call today at 4:30 p.m. ET (1:30 p.m. PT) to discuss these second quarter 2021 financial results and provide a corporate update.
The live call may be accessed by dialing (877) 359-9508 for domestic callers or +1 (224) 357-2393 for international callers and referencing conference ID number 1389708. A live webcast of the conference call will be available online from the Investors section of Xencor's website at https://www.xencor.com/. The webcast will be archived on Xencor's website for 30 days.
About Xencor, Inc.
Xencor is a clinical-stage biopharmaceutical company developing engineered monoclonal antibodies and cytokines for the treatment of cancer and autoimmune diseases. Currently, 22 candidates engineered with Xencor's XmAb® technology are in clinical development internally and with partners. Xencor's XmAb antibody engineering technology enables small changes to the structure of proteins resulting in new mechanisms of therapeutic action. For more information, please visit https://www.xencor.com/.
Forward-Looking Statements
Certain statements contained in this press release may constitute forward-looking statements within the meaning of applicable securities laws. Forward-looking statements include statements that are not purely statements of historical fact, and can generally be identified by the use of words such as “potential,” “can,” “will,” “plan,” “may,” “could,” “would,” “expect,” “anticipate,” “seek,” “look forward,” “believe,” “committed,” “investigational,” and similar terms, or by express or implied discussions relating to Xencor’s business, including, but not limited to, statements regarding the timing of data from Xencor’s early and clinical-stage programs; the timing of additional clinical studies the timing of submission of an IND for XmAb819; the Company’s ability to fund research and development programs and operations into 2024; the Company’s