Jan Witowski

879 posts

Jan Witowski banner
Jan Witowski

Jan Witowski

@JanWitowski

CEO & co-founder at @Ataraxis_AI. MD, PhD. Personalizing cancer treatment. Previously @nyugrossman @harvardmed

New York, USA Katılım Temmuz 2009
1.2K Takip Edilen1.7K Takipçiler
Jan Witowski
Jan Witowski@JanWitowski·
Just in the last few days, we've seen: - A guy in Australian using AI to design a custom mRNA vaccine - Microsoft+Providence building AI models predicting spatial proteomics from pathology slides We are so close to making cancer fully, truly personalized. Most patients would be surprised how much more we can do to select the right treatment. Even in cancer, drugs are usually given on a basis of "well, it works on average with patients of your [age/tumor size/other general characteristic]", instead of predicting if someone will benefit from the drug or not. This problem requires superhuman skills, which is why the medical world hasn't solved it yet. With AI, we are reaching the point where you can (1) predict response to all available cancer therapies, (2) do it on an individual patient level, not population level. What you're seeing in the news with these examples are still mostly research applications. Productizing this and bringing it to the clinic requires clinical validation and regulatory approvals. Good news is that there are already first tools used being used. Our AI research lab @Ataraxis_AI has built tools like that for breast cancer and they are actually used by oncologists and other physicians. Similar to the Microsoft/Providence story, these tools use very standard, widely available information, primarily pathology slide imaging. This shift takes more time than we'd all like, because new technology, whether it's a new drug, medical device, or an AI tool, requires a lot of physician and patient trust. Luckily, just like in other areas of AI applications, it has been accelerating. You'll start seeing a lot of this for all cancers, and ultimately, all diseases.
Séb Krier@sebkrier

This is wild. theaustralian.com.au/business/techn…

English
0
0
3
230
Szymon Janus
Szymon Janus@sjanus_pl·
No dobrze, to co z tym InPostem? Poinformowano dzisiaj, że konsorcjum finansowe złożyło ofertę wykupu 100% akcji firmy. Jest to zapis poprawny, ale trochę niejasny. Nie chodzi o to, że FedEx wykupuje InPost, ale że nowe konsorcjum proponuje nowy układ własnościowy gdzie znajdzie się również FedEx oraz starzy inwestorzy. Było: - akcjonariusze mniejszościowi - 52% - PPF (Czesi) - 28% - A&R Holding - fundusz Brzoski - 12% - Advent - 6% Będzie: - FedEx - 37% - Advent - 37% (to ci sami, którzy uratowali InPost parę lat temu) - A&R Holding - fundusz Brzoski - 16% - PPF (Czesi) - 10% Realnie głównym udziałowcem przestają być Czesi, zaczęli Amerykanie, a Rafał Brzoska zwiększa swoje zaangażowanie (jego akcje warte będą około 5,5mld pln). Co więcej, InPost pozostaje InPostem, siedziba zostaje w Polsce, a Brzoska zostaje CEO. Oczywiście pewne wątpliwości mogą budzić docelowe plany FedExu, ale na razie należy obserwować ze spokojem. FedEx to firma specjalizująca się raczej w obsłudze biznesu i logistyce lotniczej, więc nie bagatelizowałbym tej umowy w kontekście np. CPK, gdzie oczekujemy dużego lotniska Cargo. Z pewnością wzrosła szansa na pojawienie się na CPK InPostu z FedExem. To co nie budzi wątpliwości to to, że to porządkowanie sytuacji przed skokiem. I InPost i FedEx planują agresywny rozwój w Europie i mogą się tutaj uzupełniać. Spodziewam się kolejnej fali przejęć przez InPost w tym roku i kto wie - może w końcu InPost pojawi się w "świętym graalu europejskiej kurierki" - Niemczech? A może i pojawienie się InPostu w USA stało się nagle możliwe? ;) Warto też pamiętać, że udział udziałowi nierówny. Umowa konsorcjum może dawać Brzosce wpływy (np. głos blokujący) które nie wynikają wprost z udziału w akcjonariacie. To typowe, że założyciele są tak nagradzani/zabezpieczani, a Brzoska dla FedEx jest też wartością, a nie kosztem. To on jest twarzą i siłą sprawczą w firmie, nikt go bez powodu nie będzie wymieniać, ani zwalczać. No i miejmy też trochę zaufania do Brzoski, który zapowiadał, że to projekt jego życia i daleki jest od jego ukończenia ;) Ps. Aha, do żadnego sprzedania nie doszło, wbrew temu co piszą niektóre media. To jest dopiero propozycja, która musi zostać zaakceptowana przez 80% akcjonariuszy (na razie zaakceptowało ją 47% akcjonariuszy). Transakcja ma być zamknięta w drugiej połowie 2026.
Szymon Janus tweet media
Polski
51
66
771
91.4K
Jan Witowski
Jan Witowski@JanWitowski·
Most prognostic/predictive tools in breast cancer were built 20+ y ago, never improved, and now limit the clinical utility. We don’t need to rely on modestly prognostic tests restricted to postmenopausal eBC ER+HER2- IDC anymore. Can't wait to share our AI tools results #SABCS25
Jan Witowski tweet mediaJan Witowski tweet mediaJan Witowski tweet media
English
0
1
7
312
Jan Witowski
Jan Witowski@JanWitowski·
Ataraxis will continue to show evidence that our AI-native tools for oncology are not just more accurate than the standard of care, but that we can answer the most difficult problems in treatment selection
Ataraxis AI@Ataraxis_AI

Today, we announce a strategic research collaboration between Ataraxis AI and MEDSIR (@wearemedsir), a global leader in oncology research. The partnership will evaluate the Ataraxis Breast platform in several international randomized controlled trials. Together, we aim to generate robust clinical evidence on the role of artificial intelligence in predicting outcomes and treatment effects in early-stage and metastatic breast cancer. The analyses will especially focus on novel therapies investigated in MEDSIR's groundbreaking trials, including CDK4/6 inhibitors and antibody-drug conjugates (ADCs). This is one of many ongoing partnerships at Ataraxis working on developing a robust evidence base supporting the accuracy and utility of Ataraxis AI-native tools, and moving AI precision oncology closer to becoming the standard of care. Read the full announcement here: businesswire.com/news/home/2025…

English
3
0
8
361
Jame Abraham, MD, FACP
Jame Abraham, MD, FACP@jamecancerdoc·
Please join me in congratulating and welcoming Dr. Jennifer Tran as a newly minted Hematology and Medical Oncologist to @ClevelandClinic ! One of our own @CCF_IMCHIEFS @CleClinicMD ! Dr. Tran will be seeing patients at Strongsville and Medina, OH! Proud of Dr. Tran!
Jame Abraham, MD, FACP tweet media
English
5
4
75
3.7K
Jan Witowski
Jan Witowski@JanWitowski·
Grok 4 (Heavy and base) has been a disappointment--mostly the product, not model. Somehow it fails to maintain context even after 2-3 messages, fails to work consistently with files, randomly decides to searches the web even with the option disabled.. o3(-pro) still wins so far.
English
1
0
9
680
Jan Witowski
Jan Witowski@JanWitowski·
Congrats to our team!! What a week 😎
Ataraxis AI@Ataraxis_AI

🏆 Ataraxis won 1st place at the Nebius AI Discovery Awards! Out of 250+ global contenders innovating at the intersection of AI and life sciences, our team was honored to receive the top prize in the biotech category — and a $100,000 award — at the @nebiusai AI Discovery 2025 ceremony today! This recognition as a frontrunner in AI-driven precision medicine is a meaningful milestone, especially as we shared the stage with so many trailblazing startups redefining the future of healthcare. Thank you for this recognition of our work, our Ataraxis Breast AI tests, and Ataraxis research that helps personalize treatment for cancer patients worldwide.

English
0
0
4
373
Jan Witowski retweetledi
Ataraxis AI
Ataraxis AI@Ataraxis_AI·
We are at #ASCO25 this weekend! @JanWitowski will be presenting the results from our Ataraxis Breast clinical validation study--stop by to learn how our multi-modal AI and foundation models help personalize breast cancer treatment.
Ataraxis AI tweet media
English
0
3
7
493
Corey Speers
Corey Speers@cwspeers·
Amazing team, amazing department, and incredibly honored to take the torch carried so exceptionally by Dr. Jim Bonner for the past almost 30 years. The strength of any department lies in its people, and the people @UABradonc are absolutely AMAZING!! Great things ahead
UAB Radiation Oncology@UABradonc

We’re proud to welcome Dr. Corey Speers as the new chair of the @UABHeersink Department of Radiation Oncology. His expertise will be a tremendous asset as we continue advancing cancer research, treatment, and education. Welcome, @cwspeers! Read more: bit.ly/438BEts

English
7
3
47
3.9K
Jan Witowski retweetledi
Krzysztof Geras
Krzysztof Geras@kjgeras·
We are looking for a biostatistician to join us: jobs.ashbyhq.com/ataraxis-ai/a0… This an amazing position for someone with strong skills in biostatistics, interested in optimizing cancer treatment with AI. Please help me spread the word!
English
0
5
12
1.6K
Jan Witowski retweetledi
Krzysztof Geras
Krzysztof Geras@kjgeras·
Big personal update! As of 3/1, I’ve joined @Ataraxis_AI — a startup I co-founded in 2022 — full-time as Chief Scientific Officer. We recently raised a $20.4M Series A, and are now building a frontier AI lab to push the boundaries of personalized oncology treatment. 1/
English
6
4
84
11.3K
Jan Witowski
Jan Witowski@JanWitowski·
Ataraxis has a really unique combination of world-class AI researchers and medical/commercial leaders who brought to market new products used by millions of patients every year. We have only a few more open roles left:
Ataraxis AI@Ataraxis_AI

We are hiring for multiple engineering & research roles at Ataraxis AI! We recently raised a $20.4m Series A from top investors (AIX Ventures, Peter Thiel) and are quickly growing to help millions of cancer patients worldwide. Apply now at: jobs.ashbyhq.com/ataraxis-ai

English
2
1
6
450
Jan Witowski
Jan Witowski@JanWitowski·
@anothercohen Wait, you guys are getting candidates who are giving an actual answer instead of “n/a” or “-“ or “let’s talk”?
English
0
0
1
82
Alex Cohen
Alex Cohen@anothercohen·
Turns out if you add a simple screening question to your job listings you can filter out most of the slop applications
Alex Cohen tweet mediaAlex Cohen tweet mediaAlex Cohen tweet mediaAlex Cohen tweet media
English
175
127
6.5K
735.6K
Isabel ALAK
Isabel ALAK@ALACIsabel·
@PTarantinoMD And how do we accurately estimate that risk?? We do not have a good tool incorporating all the risk factors anatomic and biologic
English
4
0
6
223
Paolo Tarantino
Paolo Tarantino@PTarantinoMD·
When making decisions about use of adjuvant CDK4/6 inhibitors, the panel strongly supports accurately estimating the risk of recurrence (besides applying the clinical trial enrollment criteria). #SGBCC2025
Paolo Tarantino tweet media
English
9
3
36
3K
Joe Cappadona
Joe Cappadona@joecappadona·
Come join us in building the next generation of cancer diagnostics! We're accelerating faster than I would've thought possible a few years ago, and there are tons of fascinating open questions applying machine learning methods to digital pathology that you could help us solve.
Ataraxis AI@Ataraxis_AI

Big day: Ataraxis raised a $20.4 million Series A from @aixventureshq, @peterthiel, and other top tier VC funds and angel investors, including OpenAI & DeepMind researchers. This funding round comes just a few months after we revealed Ataraxis Breast, the world's first AI-native platform to personalize treatment in breast cancer patients. We also launched Kestrel, our state-of-the-art foundation model for digital pathology. Our frontier AI lab is dedicated to developing and clinically deploying tools that personalize treatment for cancer patients. In October, an 8,000-patient clinical validation study confirmed that Ataraxis Breast accurately identifies high- and low-risk patients, significantly outperforming legacy diagnostic tests. Ataraxis Breast is just the first of many Ataraxis products, and with our Series A financing, we will accelerate their development and deployment to help cancer patients worldwide. Ataraxis is already back to building, and we’re looking for exceptional people to join us. If you're passionate about AI and medicine and want to be a part of the fastest-growing AI precision medicine company, consider joining our team: jobs.ashbyhq.com/ataraxis-ai We are sharing this milestone alongside an exclusive TechCrunch feature. A huge thank you to our employees, investors, patients, and physicians—this journey wouldn’t be possible without you. This is just the beginning.

English
1
0
4
122
Jan Witowski
Jan Witowski@JanWitowski·
We raised a $20.4M Series A for Ataraxis AI, the frontier AI lab for precision medicine. We're accelerating the development of Ataraxis Breast and other tools to transform cancer. If you want join the fastest-growing startup in the space, we're hiring: jobs.ashbyhq.com/ataraxis-ai
Ataraxis AI@Ataraxis_AI

Big day: Ataraxis raised a $20.4 million Series A from @aixventureshq, @peterthiel, and other top tier VC funds and angel investors, including OpenAI & DeepMind researchers. This funding round comes just a few months after we revealed Ataraxis Breast, the world's first AI-native platform to personalize treatment in breast cancer patients. We also launched Kestrel, our state-of-the-art foundation model for digital pathology. Our frontier AI lab is dedicated to developing and clinically deploying tools that personalize treatment for cancer patients. In October, an 8,000-patient clinical validation study confirmed that Ataraxis Breast accurately identifies high- and low-risk patients, significantly outperforming legacy diagnostic tests. Ataraxis Breast is just the first of many Ataraxis products, and with our Series A financing, we will accelerate their development and deployment to help cancer patients worldwide. Ataraxis is already back to building, and we’re looking for exceptional people to join us. If you're passionate about AI and medicine and want to be a part of the fastest-growing AI precision medicine company, consider joining our team: jobs.ashbyhq.com/ataraxis-ai We are sharing this milestone alongside an exclusive TechCrunch feature. A huge thank you to our employees, investors, patients, and physicians—this journey wouldn’t be possible without you. This is just the beginning.

English
5
4
20
3.4K
Ataraxis AI
Ataraxis AI@Ataraxis_AI·
Big day: Ataraxis raised a $20.4 million Series A from @aixventureshq, @peterthiel, and other top tier VC funds and angel investors, including OpenAI & DeepMind researchers. This funding round comes just a few months after we revealed Ataraxis Breast, the world's first AI-native platform to personalize treatment in breast cancer patients. We also launched Kestrel, our state-of-the-art foundation model for digital pathology. Our frontier AI lab is dedicated to developing and clinically deploying tools that personalize treatment for cancer patients. In October, an 8,000-patient clinical validation study confirmed that Ataraxis Breast accurately identifies high- and low-risk patients, significantly outperforming legacy diagnostic tests. Ataraxis Breast is just the first of many Ataraxis products, and with our Series A financing, we will accelerate their development and deployment to help cancer patients worldwide. Ataraxis is already back to building, and we’re looking for exceptional people to join us. If you're passionate about AI and medicine and want to be a part of the fastest-growing AI precision medicine company, consider joining our team: jobs.ashbyhq.com/ataraxis-ai We are sharing this milestone alongside an exclusive TechCrunch feature. A huge thank you to our employees, investors, patients, and physicians—this journey wouldn’t be possible without you. This is just the beginning.
TechCrunch@TechCrunch

Not all cancer patients need chemo. Ataraxis AI raised $20M to fix that. tcrn.ch/3Xt7zTE

English
1
4
15
6.7K