Gross profit totaled $846 million, representing a year-over-year increase of 3.5%. Gross margin of 37.9% decreased 150 basis points year-over-year, mainly impacted by price pressure and unsaturation charges, including COVID-19 workforce related restrictions. First quarter gross margin was 10 basis points lower than the mid-point of the Company’s guidance.

Operating income increased 9.4% to $231 million, compared to $211 million in the year-ago quarter. The Company’s operating margin increased 20 basis points on a year-over-year basis to 10.4% of net revenues, compared to 10.2% in the 2019 first quarter.

By product group, compared with the year-ago quarter:

Automotive and Discrete Group (ADG): 

• Revenue decreased in both Automotive and Power Discrete.
• Operating profit decreased by 76.4% to $23 million. Operating margin was 3.0% compared to 10.6%.

Analog, MEMS and Sensors Group (AMS):

• Revenue increased in Imaging and Analog and was substantially flat in MEMS.
• Operating profit increased by 313.1% to $177 million. Operating margin was 20.8% compared to 7.8%.

Microcontrollers and Digital ICs Group (MDG):

• Revenue increased in Microcontrollers and decreased in Digital ICs.
• Operating profit decreased by 13.5% to $71 million. Operating margin was 11.5% compared to 13.4%.

Net income and diluted earnings per share increased to $192 million and $0.21, respectively, compared to $178 million and $0.20, respectively, in the year-ago quarter.

Cash Flow and Balance Sheet Highlights

				Trailing 12 Months
(US$ m)	Q1 2020	Q4 2019	Q1 2019	Q1 2020	Q1 2019	TTM Change
Net cash from operating activities	399	775	341	1,927	1,730	11.4%
Free cash flow (non-U.S. GAAP)	113	461	(67)	677	370	83.0%

Capital expenditure payments, net of proceeds from sales, were $266 million in the first quarter. In the year-ago quarter, capital expenditures, net, were $322 million.