Genentech offers various Summer Internships for undergraduates and recent graduates. Many seem to be posted in November and December. For more information, please visit their website. You can also subscribe to their employments pages to receive notifications of open positions. https://careers.gene.com/us/en/internships

"At Genentech, our achievements stem from curiosity, a passion for knowledge and a desire to make a difference. Whether you're a student or a recent grad, our internship program offers unparalleled access to meaningful projects and some of the most accomplished experts in their field.​​"