San Francisco, CA
Joined July 2010
Annie Case retweeted
Announcing $38M Seed & Series A from Sequoia, First Round, and Hummingbird. Healthleap's mission is to improve the health outcomes of as many people as possible. Results so far: • faster healing resulting in 1.6 shorter hospital stays per patient flagged as at risk by HealthLeap (Penn) • 39% more appropriate diagnoses, same staff (Cedars-Sinai) • 3 → 50+ hospitals in the past year We're hiring across all roles.
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I like sometimes to think of AI becoming our patient and steady sherpa as we climb the ravines and peaks of biology. as a field we are only at basecamp but sooner than we think, if this line of progress is continued, the view from the top will be breathtaking.  Congratulations to the @AnthropicAI team (@DarioAmodei @mgdurrant @nc_frey @eric_kabrams @ntperry13 et al.)
Today we announced the Claude-led discovery of a molecular machine that we suspect could represent a new gene editing mechanism. Its precise function, biotechnological utility (if any), or level of significance is not yet clear, but at minimum it is work I would have been proud to do as a PhD student. The work was done mostly, though not entirely, by Claude: our life sciences team suggested a broad area of research, Claude read through the literature and a bunch of genome data and discovered something interesting, then Claude proposed experiments to verify the discovery and our team carried them out. It’s easy to dismiss this as a one-off or curiosity, but we’ve repeatedly seen a pattern where AI performance in new intellectual domains goes from weak to superhuman in a matter of a few years. In 2023 models struggled to do math at the level of an average high-school student. In 2024 they started to do well on math competitions for the best high-schoolers in the country, in 2025 they started to solve minor open problems, in early 2026 more significant open problems, and in late 2026 they are beginning to solve the top few open problems in all of mathematics. We believe AI for biology is on a similar exponential trend. The main difference between biology and mathematics, of course, is that math can be done purely theoretically, while biology requires experimentation. Some have used this to draw the conclusion that AI’s utility in biology will be limited. We think this is wrong. As we’ve demonstrated today, humans can collaborate with AI to perform the experiments, validate key results in a few weeks and, if necessary, work with the AI to iterate on what they find. Eventually it may even be possible for Claude itself to safely perform the experiments by autonomously controlling lab equipment, with appropriate safeguards in place, but we aren’t doing that today (our lab is also a BSL1/BSL2 facility that doesn't handle materials dangerous to humans). More broadly, biomedical advancement has many stages — from fundamental biology discoveries, to translational research, to drug discovery, clinical trials, and finally the actual delivery of medicines and health care to patients. We are also interested in these later stages, but even simply accelerating the first stage of fundamental biological discoveries has the potential to speed up and broaden the entire pipeline. Improving our understanding of biology and sharpening biologists’ tools can drive forward all of the later stages, for example by identifying new drug targets, finding new therapeutic modalities, allowing for more precise measurement, and speeding up the experimental loop which itself further accelerates our understanding of biology. This will not in itself speed up clinical trial times, but if it succeeds it could greatly increase the number of promising candidates that go into the pipeline — an increase in throughput even though latency remains. In Machines of Loving Grace, I wrote about AI’s potential to “cure most diseases in 5-10 years” — a goal that sounds impossible, but one I believe is just barely possible if AI is applied to every stage of the pipeline. The first step is showing that AI can first help with, and then drive, biological discoveries. Claude’s discovery is the latest in a line of related prior work that goes back decades, beginning with systems like CRISPR, and continuing with discoveries like the bridge recombinase and VIPR in the past few years. Recently, there has been heightened interest in systems based on reverse transcriptase (RT) enzymes, the enzyme underlying the system Claude identified. And most recently, a Stanford team working independently described a novel RT system with an associated non-coding array that is in some ways similar to the one Claude found, though they are distinct systems that evolved independently from each other. I believe that we’re at the very beginning of finding such systems and developing them into powerful tools for biotechnology. I’m proud of the resources Anthropic has invested in accelerating the public benefits of AI through the life sciences, and we’re aiming both to grow our life sciences team and to work with other scientists to extend this approach to a broad range of problems. If you have a proposal for a research collaboration or are interested in joining our life sciences team, please reach out.
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Incredible team and mission! 🧬
Today we’re announcing we’ve raised $20M in seed financing led by @QuietCapital , with participation from @GradientVC , @haystackvc and @CompoundVC and other amazing folks to build the verification layer for AI-driven biology. We are also delighted to be welcoming @vqctran who is joining us from @GoogleDeepMind as a co-founder. AI is not going to cure all diseases without a verification substrate - a scalable environment where models can test predictions and learn against living human biology. AI is becoming increasingly capable of generating biological hypotheses, therapeutic candidates and experimental designs. But generating ideas is advancing much faster than our ability to test what those ideas will actually do in human biology. Existing systems force a tradeoff: the most biologically relevant approaches are slow and expensive, while faster in vitro and computational systems often lack the fidelity needed to capture human response. Polyphron’s bet is that tissue is the fastest, cheapest, most parallelizable verification substrate that still contains the biology that matters and we believe the path to biological superintelligence runs through closed-loop interaction with these living and simulated human systems. Thank you to @axios for covering the announcement. Link to our new website in the thread.
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Annie Case retweeted
women who gave birth without an epidural
Sequoia partner Doug Leone reveals he got a root canal with no Novocaine to see if he was really a badass "I had to get a root canal. And I had to go to a meeting right after that. I told the dentist, drill without any Novocaine.” “My whole life, I wanted to see if I was a badass or not. Am I a fake badass that has this envelope nobody could tell, or am I really a badass on the inside?" "He drilled and I jumped. And I told the dentist, I won't move again. And I didn't move again. I used the trick of thinking what it must be like to go to war and lose an arm or two legs. That's pain with consequences. Mine was pain with no consequences." “It’s just nerve endings from there to my brain to my spine, f*ck it I’m not moving.” "I had to go home and change my shirt because I was a puddle of sweat. But I didn't move. And so I love fear. It does wonders for me."
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Wow. Never bet against parents on a mission to save their child. And soon millions more! ❤️
At midnight on February 6th, earlier this year, the doorbell to our apartment rang. The doorbell was followed by a pounding on the door. I answered the door and a security person in our building handed me his phone. It was my oldest daughter Eloise. She had found my 26-year-old daughter unconscious on the floor of her apartment and had called 911. The EMT team was already there, but they did not know what was wrong with Lucy or to which hospital they would take her. I threw on some clothes and jumped in an Uber heading east toward Brooklyn. (Lucy lived alone in Williamsburg.) On the way, I learned that they were taking her to Elmhurst, a City trauma hospital in Queens. I arrived about five minutes after the ambulance to join Eloise, Lucy’s mom, and a friend, and waited to learn what was wrong. After about 15 minutes, I asked a nurse where she was. I looked over his shoulder to his computer. Next to her name, it said “non-responsive.” I walked into the emergency room and wandered around looking for her until I found her unconscious on a gurney surrounded by several doctors and nurses. By about 2:30am with the results from a CAT scan, Lucy’s doctors had determined that she had a massive brain hemorrhage and would need an emergency hemicraniectomy to release the pressure on her brain and remove the blood from the hemorrhage. I called our wonderful friend and family doctor Eddie Fisher and explained what was going on. He woke up Josh Bederson, Chairman of Neurosurgery at Mount Sinai, to find out more about Zach Hickman, the neurosurgeon on call that night. Dr. Bederson said Hickman was an excellent surgeon, which was comforting as we had no choice. The surgery to save Lucy’s life began around 3:15am and finished around 5:30am. It was successful. The following day, I joined Lucy in an ambulance while she was being transferred to Mount Sinai on Madison Avenue. Later that day, we determined from Lucy’s Oura ring that her hemorrhage had occurred around 9am, which meant that more than 19 hours had passed from the time of the hemorrhage to the completion of the surgery to release the pressure on her brain (I only wish @ouraring had an alert for this kind of a medical event. Imagine it could call a family member if the wearer doesn’t cancel the alert). I later learned that the standard of care is not to do surgery to save a patient with a large brain bleed if more than five hours have passed since the hemorrhage. Even when the surgery is done, I was told that the likely outcome for the patient is a few months in a nursing home and death from pneumonia. When I met Lucy’s doctors, I did my best to inspire them: “Let’s see what can be accomplished if we give her the best care possible and we invest unlimited resources to restore her to life.” And I promised that whatever we learned we would make available to everyone. Dr. Chris Kellner, her neurosurgeon, and Dr. David Putrino, Director of Rehabilitation Innovation for the Mount Sinai Health System have led Lucy’s care team since that day. Words cannot describe the remarkable and compassionate care that she has received beginning with the EMT team and then from nurses, doctors, therapists, and the army of people who have worked to save her and return her to life. To this day, we have a daily Zoom where we discuss her progress and make adjustments to her care. While her care and oversight have been incredible, the learnings for the Mount Sinai team have also been elucidating and will assist in the care of many others. Lucy began in a bad place. She was in a coma for several weeks and then awoke not being able to breathe on her own, unable to walk, see or speak. Over the last six months, she has recovered her cognition – she understands everything including her circumstance – is able to walk a hundred or more steps at a time with assistance, is making progress with sounds, vowels and consonants and the beginnings of speech, but she remains unable to see. Each day, she makes a little progress, and daily progress compounds. Every day I tell her that she just needs to make a little progress and it won’t be long before she is back. We remain optimistic that Lucy will return to normal function. It will likely take years, but I believe it is only a matter of time, hard work, and technological progress, along with some, and perhaps a lot, of divine intervention. Many people have been praying for Lucy and we are incredibly grateful for the prayers and remarkable support she has received. Lucy’s friends have been with her every day since the beginning, and their presence and friendship have saved her life and helped to rebuild and maintain her spirit. And on a very positive note, Lucy’s challenge has brought together our entire modern family who have all been incredibly devoted to her care and recovery. Lucy's vision and other faculties may require some form of brain computer interface, work that is underway at Neuralink, Precision Neuroscience, Science, Synchron, Nudge, and other companies in the space. If you are going to have a devastating brain injury, now is the best time in history for that to happen. We are living in a world when you can be confident that the blind will soon see again. We are going to do everything we can to help make that happen, including by assisting existing companies in the space. With respect to our promise to make Lucy’s care available to others, we have made good progress. In May, a real estate colleague made me aware of a 93% vacant, brand new, 400,000 square foot Class A+ purpose-built biotech facility on West End Avenue between 65th and 66th Streets that missed the market and was available for sale. The Pershing Square Foundation acquired the building 60 days later. We also put under contract an adjoining 130,000 square foot building at 320 West 66th Street that is currently being used by Saturday Night Live for studio space. The building has 35-foot ceilings with massive column-free spaces that can be converted into superb rehabilitation facilities. We will close on the SNL building in December. We are also acquiring an adjoining vacant lot with additional air rights. With just the existing zoning rights, we can add a 150,000 square feet for a total of 680,000 square feet, a lab footprint larger than Rockefeller University, and that’s without including the potential for an upzoning that would allow for substantially more buildable area on the site’s 3.4 acres with spectacular views of the Hudson. Our goal is to build the world’s greatest brain research, rehabilitation, recovery, human optimization, and longevity institute. We have named it The Ackman Oxman Institute or the AOI for lack of a better name, but also to reinforce the point that Neri and I and our family are all-in on the mission. The AOI will be patient-centric. It will not be an academic research institute that produces lots of papers, a Nobel Prize winner or two, but little if any results for patients. We will be laser-focused on cures, treatments, devices, rehabilitation and exercise equipment, and targeted and basic research with a goal of massively accelerating the time from idea to innovation to production to helping a patient. While the AOI will be a non-profit, it will have highly commercial instincts. The AOI will have its own venture funding and will work to develop innovations to create companies that we will seed, assist, and spinout to ensure technologies, treatments, techniques, and drugs get to patients as promptly as possible. On one 3.4 acre campus in what is still the greatest city in the world, we will do neurosurgery, neuroscience, rehabilitation, nutrition, BCI and device development, human trials, hyperbaric oxygen treatments, and life extension programs, and we will mandate and incentivize collaboration among the teams with no silos, politics, bureaucracy, or any other constraint that is inconsistent with the mission. Mount Sinai will be an important partner and deservedly so, but it won’t be our only hospital or medical school partner as we don’t believe any institution has a monopoly on the best ideas or the best talent. We don’t believe in exclusive relationships because that is not in the best interest of patients. Five years ago, we considered launching a brain institute inspired by Neri’s mom who sadly died from Alzheimer’s. We couldn’t make the math work as the real estate was too expensive and we believed it would be too difficult to recruit the best talent from universities to our effort. Since then, the real estate became available at a 70% discount, universities became a much less attractive place to work due to politics outweighing meritocracy, protests that disrupt learning, the curse of antisemitism, and a decline in funding. Fortunately, during the same time, I made sufficient personal economic progress to make the AOI possible. The advance of AI in the last few years will also enable us to greatly accelerate our mission. AI still has a lot to learn about human intelligence and the brain, and the AOI should be at the forefront of the interplay between the brain and AI. Today, I am making a public filing disclosing a gift from Neri and me of ~$400 million or 10,000,000 shares of Pershing Square Inc. (PS) to the AOI. It is very early days for Pershing Square so these shares are intended to anchor the long-term work of the AOI as the shares compound over time while generating what we expect will be a growing stream of quarterly dividends to fund the Institute. We will also be announcing an additional gift of similar and potentially greater size which won’t be in the form of Pershing Square stock to provide the AOI with the short- and intermediate-term runway necessary to enable it to achieve its goal of becoming a self-sustaining institute, which reinvests all of its revenues, royalties, and the economic rewards of company formation to advance the fields of brain health and human longevity. Neri and I have chosen to anchor the funding of the AOI to maintain vision alignment and limit the need for the organization to focus on fundraising. We expect the AOI to be the best-resourced brain, rehab, recovery, and longevity institute in the world. We are grateful to have been able to form a board which includes Dean Kamen (our generation’s Thomas Edison), George Yancopoulus (CEO of Regeneron), James Rothman (Nobel Laureate), Bernardo Sabatini (neuroscientist), Chris Kellner (neurosurgeon), Olivia Flatto (CEO Pershing Square Foundation), Neri Oxman, and myself. We have recently identified a CEO who we expect to announce by October along with other key hires, and are beginning searches for a Chief Scientific Officer, a Chief AI/Technology Officer, a Chief Operating Officer, a Chief Financial Officer, and other key leadership roles. If you find what we are building compelling and want to be part of the leadership team that creates and builds the AOI from a standing start, please send an email to: [email protected] with a short note as to why you believe you can help. Please include your best three ideas for the AOI along with a summary of your background and your most important accomplishments. We promise strict confidentiality to those expressing interest in working with us. We have learned from Lucy that the brain can recover from even catastrophic injury. There is so much more work to be done as the mind is a terrible thing to waste. For details from my Pershing Square SEC filing see: sec.gov/Archives/edgar/data/…
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Ken Griffin on the single factor he looks for when hiring at Citadel: "show me an athlete who did well academically." "an athlete because they know what it takes to win and they've had to experience loss." talent is everywhere. what's rare is someone who knows how to lose, recover, and still perform at a high level. same thing separates profitable traders from everyone else.
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parenthood is hard. not for the usual reasons but because it feels impossible to adequately savor it. i know i'm in the days i will achingly miss one day but try as i might i still can't commit every moment to memory. that determined look on her face when she is carefully inspecting a new toy, will i remember it in ten years? the way she giggles during peekaboo, am i going to be able to call that sound to mind? her babyhood is slipping away as i desperately grasp for it, all of it at once, catching only the slivers that i record in journals and pictures and the collective memories of those who love her. what a gift to catch any of it and still i yearn for it all
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Today we're announcing @_panthalassa’s $140M Series B, led by Peter Thiel, with participation from John Doerr and many other incredible investors. The mission: unlock the ocean as another planetary-scale energy resource for humanity. First stop: compute.
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OpenAI now recruiting SF preschoolers 😂
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So crazy that it just might work
So, @_panthalassa operated mostly in secret for a decade. And what it built is nuts. Massive, massive floating data centers that drive themselves out to sea and then capture water inside of them to spin a turbine and power GPUs. Look at these things. Full episode on the tech here youtube.com/watch?v=Q4PCJRN7…
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Annie Case retweeted
Let’s use AI for the right things.
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In an era of AI slop and sameness, Sam and the team at Sentience are taking a big swing at building a product that reflects an individual’s context, style, and taste. Thrilled to support them on this worthy quest!
We raised $6.5m to build humanity’s platform for uploaded consciousness. Sentience creates one unique model for every person — a digital twin of your mind — to remember everything, recall what matters, and operate as you. I started this company because I am worried. For the first time, we have intelligence that will fully replace humans across a range of domains within a few years. For those outside of the tech echo chamber, this is a period wrought with confusion and uncertainty about what actually matters anymore. I’ve had numerous conversations with people who aren’t sure if they have any value as a unique human being, or whether their own thinking matters. While Silicon Valley goes full speed ahead towards AGI, many people are left wondering what place they have in this AI future. If I can communicate one thing to everyone out there with these doubts, it would be this: your unique knowledge, memories, and who you are still matter. In fact, these things matter now more than ever. The problem is that the course of AI is heading towards a world where all of us will outsource our thinking to the same one-size-fits-all AI models. This is not a hypothetical future. If 100,000 people ask a question to ChatGPT, every single person gets the same answer. You can see the cost of uniform AI models across writing, social media, and even academic papers. This uniformity is more than annoying – it’s dangerous. There’s a genuine chance that we lose the texture and vibrancy that makes us unique as a species. I founded The Sentience Company to arm real humans against this dystopian outcome. First, your Sentience lets you collect everything that holds context from your life, learning from what you do across every platform – starting on desktop and mobile. Never forget a detail again. Second, your Sentience becomes the best recall engine for everything in your life. Never copy/paste context or search across 50 chrome tabs again. Finally, your Sentience becomes the full simulation of you – an AI model that thinks and acts like you, to scale and share your unique ideas and interact with others. Your Sentience emulates more than your context. It understands your values, emotions, drive, and goals. We’re creating a world where you can leverage your own Sentience model alongside the models of your colleagues and friends to jam on ideas and access their knowledge 24/7. We’re not building Sentience to scale AGI and replace more human thinking. We’re building Sentience to scale you. We’re proud that many amazing humans are supporting our mission. Our round was led by @kevinzhang (@BainCapVC), with participation from @ditzikow, @adityaag, @evantana, @AgrawalArian, @gopalkraman, @JPBrebner (@spc), @rex_woodbury, @tmrohan, @soleio, @anniecase1, and many more.
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AI is already transforming healthcare, but in clinical environments, trust can’t be an afterthought. That’s what makes @healthuniverse_ so compelling. In less than a year since launching Navigator, the team has processed 170M+ clinical documents. Congrats to Dan Caron and the team on today's announcement ⬇️ mobihealthnews.com/news/excl…
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Annie Case retweeted
months to see a doctor, clinicians burning out, insurance wants to pay less hospitals make more when you're sick @lotus is putting the patient back at the center of care and empowering them to take control speaking with @kleinerperkins (early backers of Google, Amazon, Spotify) about free primary care for 100M Americans
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The future of primary care is here! I'm amazed by what @kjdhaliwal and the team have built already, and couldn't be more excited to have led the seed and co-led the Series A. Special company in the making.
100M Americans don’t have a primary care doctor, so we built @lotus, the first AI doctor powered by real doctors able to refer, diagnose and prescribe not generic AI advice, treatment by licensed clinicians free & available anytime leading investors just backed us with $41M
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Annie Case retweeted
100M Americans don’t have a primary care doctor, so we built @lotus, the first AI doctor powered by real doctors able to refer, diagnose and prescribe not generic AI advice, treatment by licensed clinicians free & available anytime leading investors just backed us with $41M
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Excited to finally share more about KP’s first incubation since Glean: @RoadrunnerAI. Building this company with Ajay Natarajan, Eugene Shao, and our incredible team has brought me the most energy I’ve ever felt in my career. Grateful to @kleinerperkins and @mamoonha for backing this - and for letting us build upstairs in the SF office for the past several months 😬. Huge thank you to our design partners who took an early bet on us to codevelop a solution that finally fixes CPQ. We marked the moment by flipping the script on the @KPGrit podcast. Mamoon interviewed me about my story and how many unlikely turns ended up pointing toward Roadrunner. If you’re interested, reach out. I’ve never seen this level of pent-up customer demand, and I’ve never seen an engineering team ship with this level of velocity and craft.
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He’s back and looking for the next @ryangraves 👀🔥
backgammon nerd sidequest alert: I bought eXtremeGammon the preeminent backgammon engine & looking for right "re-founding" CEO discrete mathematics, neural nets, game theory, heavy UX, social, gambling, all the good stuff.. ANY TIPS? - bit.ly/4iA61jU
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