Bill’s contributions to the biotech world were nothing short of extraordinary.  He has touched countless lives and inspired many of us.  His entrepreneurial vision and remarkable leadership led Chiron to a successful and innovative biotech company.  It was one of the first to have a dedicated diagnostic division and operated a reference laboratory for blood supply safety.  Our world has lost a brilliant mind, but his legacy will live on.  

Bill taught me so many things:

Academics are not money-grubbing when they start a company or work for the private sector.  They are solving health problems and creating jobs in their cities.  Attending a Chiron Christmas party was my epiphany.

If we have an idea, go test it, without first seeking permission.  Seeking approval of a lousy idea wastes good people's time.  If it works, good people will welcome it. Was there ever approval of a Hormone Research Institute? Bill didn't even have to ask forgiveness.

A Chair is parent to all his faculty, not just the ones that the Chair likes.

Creative people prefer to work with leaders like Bill, who favor a flat rather than a hierarchical organization.

Act like you are still young, even when you are not.

Life is about more than science.

Thank you, Bill, from  a devoted mentee

Bill was a remarkable visionary — a scientist, entrepreneur, and educator who left a profound impact on all who worked with him. I feel truly fortunate to have had the opportunity to work at Chiron and to contribute to something meaningful for society under his leadership.

— David Y. Chien

Dr. Rutter’s vision and pioneering spirit transformed the landscape of biomedical science and touched countless lives. His legacy of innovation, collaboration, and dedication to improving human health will continue to inspire generations of scientists and caregivers. Heartfelt condolences to his family, friends, and the entire UCSF community as we honor and remember his extraordinary impact.Sincerely,Thomas Berbas

Such sad news. My condolences to Bill's family. I met Bill only once to talk about our capacity building programs in Africa and he was gracious and supportive. I was really hoping to welcome him one day in Morocco. His pioneering research and his generous support had a tremendous impact so far and will continue to transform lives. Rest in Peace.

I am deeply saddened to hear of Bill’s passing. He trusted me to help organize the department of biochemistry and biophysics when he hired me in 1969 to be, first, his secretary and then as the MSO. I had not been to college but he recognized and promoted my talent. After working with Bill for 8 years I went to Stanford for a Ph.D in education policy and we remained in touch. Throughout our 57 years of friendship he always treated me as an equal and reveled in my success, as I did in his. I count myself lucky to be among the many people fortunate enough to work with him. My life is blessed by his support and love. Thank you, Bill.

What an inspiration Bill was for all of the scientists at Chiron. I recall him always interested in data and ideas, ready to take the time to understand the nuances. Along with Pablo Valenzuela and Ed Penhoet, he made Chiron an amazing place to work and to discover. My condolences to his family and friends.

My condolences to “Bill’s”  family. I first met  Bill when I supported the Human Resources Department at UCSF FOR HIS DEPARTMENTS.. He was such an engaged client and had the best sense of humor & so engaged & interested in what your job was & how you performed it.. He would share his knowledge as well as a hiring leader.. 

I then worked  again at Chiron Human Resources.. He was so interested and supported HR..

What a GIFT to HUMANITY.. 

 BILL BROUGHT TO THE WORLD  HIS KINDNESS AND CHANGED  IT WITH HIS  GOALS  TO “END HUMAN  SUFFERING” 

HE WILL BE SO MISSED BY HIS COLLEAGUES.. 

Kindly Janice Collins..

Thank you all for sharing  Bill to  science & us!! 

Dinner with Friends — with Hank Rutter, Thomas Hecht and Bill Rutter

Swiss Biotech Success Stories Award — with Filippo Riva, Antonio Lanzavecchia, Thomas Hecht, Bill Rutter, Federica Sallusto, Davide Corti, George Scangos and Nadia Passini

It is with great sadness that we bid farewell to Bill Rutter, an extraordinary individual who touched the lives of so many and whose legacy continues to shape the world of science, biotechnology and the many communities he influenced throughout his long and impactful life.

Bill was a person of exceptional character—his strong will was matched only by his firm handshake—and he carried himself with a rare, down-to-earth humility. Starting from San Francisco, Bill’s vision and tenacity helped shape the world of biotechnology, driving innovations that led to the development of life-saving drugs that continue to benefit countless patients around the world.

For myself and the entire team at Humabs BioMed, Bill was more than a founder and our chairman. He was a guiding force—steadfast in his support—who stood by us through challenges and triumphs alike. Under his guidance, our efforts led to the development of Ebanga, a vital therapy for Ebola, and his unwavering belief in our mission paved the way for the sale of the company to Vir Biotechnology. Thanks to Bill’s vision and perseverance, in 2023 Humabs was honored with the "Swiss Biotech Success Stories" award—a recognition of our team's dedication and contributions to both science and the broader Swiss biotech ecosystem. None of this would have been possible without Bill's leadership and inspiration at every step.

Bill Rutter’s impact extends far beyond the scientific community; he was a mentor, a collaborator, and a friend to many. His legacy will continue in the lives of those he helped, the innovations he inspired, and the spirit of determination he instilled in all of us.

We are grateful for the time we shared with him, and we send our heartfelt condolences to his family and loved ones. Bill will be deeply missed and forever remembered.

Bill Rutter was the quintessential Scientist. After one of his many round-the world seminar tours, he landed in Moffitt Hospital. After his gall bladder surgery, a few of us from the HSW10 lab walked over to his hospital room.  He jumps out of bed and grabs a beaker full of his bright, green bile. “Look what they took out of me!"

Bill Rutter- his strong handshake, offering his full engagement; the twinkle in his eye, revealing his delight in the moment. Bill saw a world full of possibilities, and in his presence, you believed in those possibilities too. Bill dreamt big, but he also had the ability to convert dreams into reality. Bill had vision, conviction, pragmatism, communication skills, an ability to work collaboratively with others, so many rare attributes wrapped up together in one unique “Bill Rutter package.” In addition to his many accomplishments (including guiding the rise of the basic sciences at UCSF and being an early pioneer in launching the biotech industry, among others noteworthy efforts), Bill was marvelous person who valued friendship and was wonderfully loyal and caring to his family and his friends. It was a great privilege in my life to have known Bill and experience his friendship. Almost every moment I have spent with Bill was, in some way, magical and memorable. I derived much inspiration from Bill about life, science, and simply how to be alive in this world. As I grow older, I hope that I can model Bill, even with a just fraction of his energy, creativity, optimism, and compassion. He lived a full life, a very full life until the very end. Bill was a force of nature; he created so many ripples in the world, touching many people in positive ways including myself. Those ripples will continue many, many years past his death. I will miss Bill, but I am grateful for the time I had with him and for the friendship and kindness that he directed towards me. My condolences to all who have known Bill.  In a lifetime, one will rarely cross paths with such a man.

I've known Bill for over 20 years.. worked for him and his companies as a consultant for many years when we lived in San Francisco and have stayed in touch (sporadically) over the years for mentorship and friendship.  Most recently we ended up in SF for medical reasons and I had reached out to Bill for guidance in the UCSF clinical trial system.. we had a good conversation and as always he was attentive, genuine,  helpful.. supportive, and a thoughtful listener  - and offered help as needed.  He also shared that he was renovating his home near Coit Tower.. and we should come visit when we got back to SF - I had shared that as long as it was wheelchair accessible we would be there.  

I had been emailing Bill very recently for guidance when I learned that he passed.  My first thought was sadness but then I realized.. what an incredible ... wonderful.. amazing individual who did such good for the world.. I will miss my interactions with Bill and send sincere condolences to his family.. 

xoxo/mdmd

What a life!!! I know you both are going to miss him tremendously.

Thinking of you, hoping you both are doing well and living a life of joy and

adventures....just as your Dad did!!

Think of you often!

Love Cynthia Jeanne

I had the chance to work with Dr. Rutter some years and he was a very kind and witty person. All my condolences to his family. May his gentle soul rest in peace. 

I was a junior postdoc in Bill’s lab in 1980 and had been there about six months. My mother was in town, getting radiation treatments for metastatic cancer at Stanford. She had been a nurse before having five kids, so she was proud to learn I was working on Hepatitis B (seemingly more important than my graduate work on Euglena chloroplast DNA). Mom told me she wanted to visit the lab, so I arranged for her visit during the departmental seminar (I’m now embarrassed to admit that I was then embarrassed to show my mother around the lab). I showed her my lab bench and desk, and introduced her to Graeme Bell, the only person left in the lab. We then headed down the long hallway, and I was glad to make no more introductions. We were almost to the elevators when I heard the sound of fine Italian loafers sprinting towards us from far down the hall. It was Bill, and I assumed he had a disaster to fix at the Biochem office where he was chair. But Bill screeched past the office door. He continued to sprint until sliding to an elegant stop directly in front of us. He gently shook my mother’s hand and proceeded to tell her what a genius I was, and the first-rate science I was responsible for, and the great future I had in front of me. He laid it on so thick that I was sure my mother wouldn’t believe it, I knew I didn’t. One look at her told the opposite—she was beaming. She believed it all, and I never saw her more proud of me. Then and there I knew I would be forever indebted to Bill. 

Here are a few more photos that Bill’s son, Hank, kindly asked me to share.

Immensely brilliant, deeply insightful, highly inspirational, outcome-oriented, and outstandingly successful — yet humble enough to speak with anyone who approached him. These are the qualities of Bill Rutter I witnessed while working with him at UCSF, Chiron, and Synergenics. Among many achievements, his iconic contributions to HBV, HIV, and HCV research made these once-feared viral diseases detectable, preventable, and treatable, saving countless lives around the globe. In his 90s, even until recently, his commitment to science hardly waned. He and I discussed next-generation vaccines, new diagnostics, and pan-CoV-specific therapies. I’m sure these were just a few — he likely had many more with others. He was legendary.