Regeneron employees smiling and working together on an outdoor community park cleanup project.

10 Years of Impact Through Our Global Volunteer Initiative

As Day for Doing Good enters its second decade, we reflect on what it has meant to colleagues and communities.

Regeneron

October 19, 2026

This year we’re celebrating the 10th anniversary of Day for Doing Good (D4DG), the global expression of our commitment to creating a healthier world through volunteering in our communities. Over the past decade, this annual service event has become much more than a tradition — it’s a movement that reflects and reinforces who we are and the good we do every day through our work.

“Every day at Regeneron is a day for doing good, as our dedicated people fight back against disease at every step: from discovering new medicines, to testing and manufacturing them, and delivering them to millions of people globally. A decade ago, we launched our Day for Doing Good program, when our people step away from our work to volunteer and make an impact in our local communities. Regeneron has a heart and soul because our colleagues stay committed to our founding principle that we can all do well by doing the most good!”

Len Schleifer, MD, PhD Board co-Chair, President and Chief Executive Officer

George Yancopoulos, MD, PhD Board co-Chair, President and Chief Scientific Officer

Fostering Connection, Belonging and Leadership

150,000 hours of volunteer work. 3,000 volunteer projects. 13 countries. And counting. What began as a single day of service in 2017 has grown into a significant employee-driven volunteer activation, with participants ranging from our newest hires to senior leaders.

“Every day, Regeneron’s science translates into real progress for patients and that same commitment to doing good extends to how we show up for each other and our communities. By stepping out of our usual roles and working side by side, we’re building the culture of belonging and collaboration that strengthens our ability to meet our mission and impact,” said Christina Chan, Senior Vice President, Corporate Affairs.

Beyond the community service itself, D4DG also provides an important opportunity to connect with colleagues, build meaningful relationships and grow as leaders — a chance to bring our values to life.

“From hands-on service like cleaning parks to skills-based volunteering such as mentoring students and helping nonprofits build capacity, our colleagues contribute their time and expertise in ways that respond to real community needs,” said Potoula Stavropoulos, Senior Director, Social Impact. “That commitment strengthens long-term partnerships and helps create lasting change in the communities where we live and work.”

Celebrating 10 years of community volunteerism through our Day for Doing Good

Perspectives from Repeat Project Leaders

Over 650 colleagues have served as Project Leaders since D4DG launched. Two long-term leaders shared why they spearhead D4DG projects, year after year.

I first got into volunteering as an intern here in 2008. It wasn’t a significant part of my life before joining Regeneron. I enjoyed the feeling of giving back, so leading projects became my way to give that same opportunity to my colleagues. Each year, our Protein Expression Sciences department comes together, creating a shared volunteer and team-building experience even as our group has grown.

We change it up every year and go to new places because variety keeps the energy high and the experience fun. Trying different activities — from food repacking to bike builds to trail cleanups — keeps us learning and engaged. That mix of new environments and fresh challenges means we get to explore, contribute and grow together. I believe in doing well by doing good and in making it easy for others to participate.

Rishi Mahajan, Manager, Protein Expression Sciences, VI Antibody.

Tarrytown

I started at Regeneron the same year D4DG started. I was looking for ways to get involved as a new employee and remember how exciting it was to learn we had an intention to reach as many nonprofit organizations with as many Regeneron colleagues participating as possible. I just knew I wanted to be a part of it — and stay a part of it.

I’ve been leading at the same nonprofit since the first year. It’s been incredible having that personal connection and seeing the organization grow over the last decade. Since we go back year after year to the same school, the kids know us. You can’t not be excited about what you’re doing when they’re so excited! Many of our D4DG team return year after year and are so passionate about the work, and some volunteer there on their own now, too. There’s so much joy involved.

Arielle Twardowski, Senior QA Specialist, IOPS.

Rensselaer

10 Years of Impact Through Our Global Volunteer Initiative

As Day for Doing Good enters its second decade, we reflect on what it has meant to colleagues and communities.

Fostering Connection, Belonging and Leadership

Perspectives from Repeat Project Leaders

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