Total revenues were $28.0 million for the quarter ended December 31, 2021 compared to $85.8 million for the quarter ended December 31, 2020, and $69.9 million for the year ended December 31, 2021 compared to $132.3 million for the year ended December 31, 2020.
The decrease in both periods was driven by the recognition of a $60.5 million upfront fee received under the Company’s collaboration agreement with Jazz Pharmaceuticals during the quarter and year ended December 31, 2020 and a reduction in non-cash royalty revenue in 2021 due to the completion of the first tranche of payments under the 2015 Kadcyla royalties agreement.
Partially offsetting these decreases, during the quarter and year ended December 31, 2021, the Company recognized $14.6 million of the $40.0 million upfront fee previously received pursuant to the Company’s collaboration agreement with Huadong Medicine.
Research and development expenses rose to $49.0 million for the quarter ended December 31, 2021 compared to $39.6 million for the quarter ended December 31, 2020, and $151.1 million for the year ended December 31, 2021 compared to $114.6 million for the year ended December 31, 2020.
The increases in both periods were driven by greater clinical trial expenses, personnel and temporary staffing costs, external manufacturing costs, and third-party service fees in support of commercial readiness.
General and administrative expenses were $13.6 million for the quarter ended December 31, 2021 compared to $9.7 million for the quarter ended December 31, 2020, and $43.8 million for the year ended December 31, 2021 compared to $38.6 million for the year ended December 31, 2020.
The increases in both periods were driven by higher professional fees and personnel expenses, including greater non-cash stock compensation expense.
Net loss for the fourth quarter of 2021 was $(37.2) million, or $(0.17) per diluted share, compared to net income of $31.4 million, or $0.16 per diluted share, for the fourth quarter of 2020.
Net loss for the year ended December 31, 2021 was $(139.3) million, or $(0.68) per diluted share, compared to a net loss of $(44.4) million, or $(0.25) per diluted share, for the year ended December 31, 2020.
ImmunoGen had $478.8 million in cash and cash equivalents as of December 31, 2021, compared with $293.9 million as of December 31, 2020, and had $2.1 million of convertible debt outstanding as of December 31, 2020.
There was no convertible debt outstanding as of December 31, 2021. Cash used in operations was $169.4 million for the year ended December 31, 2021 compared with $78.6 million for the year ended December 31, 2020, with the prior year benefitting from a $40 million upfront license payment received from Huadong Medicine and lower operating expenses for the year as discussed above.
Capital expenditures were $(1.4) million for year ended December 31, 2021, compared with $0.5 million of net proceeds from the sale of equipment in the year ended December 31, 2020. ■