| (in millions) | 4Q 2020 | 3Q 2020 | 4Q 2019 | |||
| Cash, cash equivalents, restricted cash and short-term investments—end of period | $369.2 | $368.4 | $350.3 | |||
| Routine capital expenditures | $5.6 | $2.6 | $3.0 | |||
| Dividend payments | $12.1 | $12.3 | $12.1 | |||
During the fourth quarter, we had $5.6 million of capital expenditures for the routine purchase of testing equipment, software, design tools and other items.
Returning Value to Shareholders
On October 26, 2020, our Board of Directors declared a $1.40 per ADS annual dividend to be paid in quarterly installments of $0.35 per ADS. On November 25, 2020, we paid $12.1 million to shareholders as the first installment of our annual dividend.
On November 21, 2018, we announced that our Board of Directors had authorized a new program for the Company to repurchase up to $200 million of our ADS over a 24-month period. On October 26, 2020, the Board of Directors of the Company authorized the extension of the expiration of this program to November 21, 2021. Since the start of this program, we have repurchased $84.8 million of our ADSs and $115.2 million remains available for repurchase under the program. There were no share repurchases in the fourth quarter.
Business Outlook
“We are kicking-off 2021 with what we believe will be an unseasonally strong first quarter and an extremely strong order book for the year, with sales growth currently capped by foundry supply availability,” said Wallace Kou, President and CEO of Silicon Motion. “We are seeing strong, broad-based OEM demand and design activities for our SSD and eMMC+UFS controllers and expect this momentum to carry over to 2022. PC OEMs are driving strong demand for PCIe NVMe SSD controllers and smartphone and IOT OEMs for UFS and eMMC mobile embedded storage controllers.”
For the first quarter of 2021, management expects:
| GAAP | Non-GAAP Adjustment | Non-GAAP | |
| Revenue | $154m to $161m
7% to 12% Q/Q | -- | $154m to $161m
7% to 12% Q/Q |
| Gross margin | 47.9% to 49.9% | Approximately $0.2m* | 48.0% to 50.0% |
| Operating margin | 18.9% to 21.1% | Approximately $3.1m to $3.3m** | 21.0% to 23.0% |
