CEO and Chairman at CRISPR Therapeutics @CRISPRTX, which is pioneering a new era of gene-based medicines. Tweets are my own.

Joined October 2015
Photos and videos
Samarth Kulkarni retweeted
$VRTX $CRSP: New CASGEVY paediatric data looks strong. In ages 5–11, 11 SCD patients dosed; 8/8 evaluable were VOC-free ≥12 months. In TDT, 15 dosed; 8/8 evaluable achieved transfusion independence ≥12 months. US review underway; UK & Saudi submissions completed. Increases TAM
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Samarth Kulkarni retweeted
$BDTX and $AVBP comparable based on mPFS. $BDTX clear advantage in CNS metastases ? “Robust CNS activity, with 86% CNS ORR; no patients developed de novo brain metastases”
Replying to @JacobPlieth
Cross-trial mPFS comparison for $BDTX is $AVBP, which clailmed 16.0 months in 1st-line PACCm patients at #WCLC25.
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Samarth Kulkarni retweeted
I am extremely skeptical of the long-term prospects for in vivo gene therapy with viral vectors that do random or semi-random integration.
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Congrats to Kathy High and Stu Orkin (and their colleagues) on winning the Breakthrough Prize, both of whom I’ve had the pleasure of working closely with! Luxturna and Casgevy are groundbreaking therapies that will pave the way for many more.
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Samarth Kulkarni retweeted
Centessa has entered a definitive agreement to be acquired by @EliLillyandCo. To our team, investigators, patients, and advocates: thank you! Please refer to today’s full announcement for key information and cautionary statements: investors.centessa.com/news-…
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Today we shared an update on zugo-cel (formerly CTX112) - best-in-class allogeneic CD19 CART! The data reflect encouraging progress across autoimmune disease and hematologic malignancies and support the continued advancement of zugo-cel across multiple disease settings. @CRISPRTX
Today, we shared a clinical update on zugo-cel (formerly known as CTX112™), reflecting continued progress across autoimmune disease and hematologic malignancies. Learn more here: bit.ly/4asQ0ub
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#AHA25 and @NEJM data for CTX310 by @ProfSNicholls . A single in vivo administration safely and durably lowered ANGPTL3, reducing triglycerides and LDL, progress toward applying gene editing to more common diseases. @CRISPRTX
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Pleased that the FDA has included CASGEVY for patients with SCD and TDT in the CNPV pilot program, recognizing its potential clinical benefit and the importance of early intervention to help change the course of these diseases. @CRISPRTX $crsp
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Enjoyed this discussion with @Nimish1316 on the gene editing space and the biotech sector at large! I've gotten a chance to work closely with Nimish on Oruka Tx
15 Oct 2025
🎙On our latest episode of Running Through Walls, @Nimish1316 speaks with @CRISPRTX CEO & Chairman @CrisprSam about their incredible gene-editing platform and his advice for building businesses around life-changing science. Listen more here: bit.ly/4n8iZGf
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Fully agree with Bob
20 Sep 2025
USA message should be “We want the best and brightest scientists and their families to come here. And stay here. And innovate here.” Getting our ass kicked by our adversaries in drones and robots and AI is not a fun option.
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Samarth Kulkarni retweeted
Thank you, @Shea_ARK, for surfacing the potential value of one of the most important biology breakthroughs of our time: CRISPR gene editing. Many analysts seem to think that one-time cures will not be a good business, @ARK Invest begs to differ! $CRSP, $NTLA, $BEAM, $PRME
11 Sep 2025
Cardiovascular disease is the world’s leading killer. With CRISPR-based therapies targeting lipid metabolism genes, a one-time treatment could reshape prevention and open a ~$2.8T market. Read @Shea_ARK's analysis in her first ARK research paper. ark-invest.com/articles/anal…
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Samarth Kulkarni retweeted
👀 shot > pill? 💉 > 💊 at a certain point @bioinvestor24 cites an $ABBV survey that shows psoriasis pts prefer a q3m injection over a daily pill. Analysts often assume “oral = convenient” for $KYMR in AD vs $APGE q3m shot. Reality is efficacy freedom from daily dosing often trumps pill convenience. At a certain point efficacy is NOT perceived as equal, where that standard deviation lies varies, but end of day patients want what works, not what’s easy.
$ABBV management just quoted a survey that psoriasis pts prefer q 3 months injections iver daily oral pills. Beyond stat6 efficacy , why some non medical analysts automatically presume AD pill potentially from $KYMR is more convenient that q3 months shot such as from $APGE ?
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Thank you! It’s a reflection of all the employees who are dedicated to the cause of bringing cures to patients!
Congrats to @CrisprSam - the CEO of @CRISPRTX on being part of the TIME100’s Health list - honoring the 100 most influential people in health today. $CRSP is the first-ever company to receive an FDA approval for its Gene Editing treatment - CASGEVY. A well-deserved recognition!
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Congrats @CRISPRTX on being named to the @TIME Most Influential Companies of 2025 list! Proud of the full company and excited for the future of genetic medicine. #CRISPRTX #TIME100Companies
26 Jun 2025
Introducing TIME's most influential companies of 2025: 100 companies around the world that shaped culture, made new strides, reached milestones, and more ti.me/3TIvR9G
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We are excited to announce our collaboration with Sirius Tx. This strategic partnership expands our therapeutic toolkit & broadens our cardiovascular portfolio. We look forward to working closely with the Sirius team to advance this exciting asset
Today, we announced a collaboration with Sirius Tx to co-develop SRSD107, a next generation, long-acting Factor XI siRNA for the treatment of thromboembolic disorders. This will expand our cardiovascular portfolio and broaden our therapeutic toolkit. bit.ly/4kjPEaS
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Thank you @TIME for naming me on the #TIME100HEALTH list! Honored to be included and congrats to all the 2025 honorees. time.com/time100health

8 May 2025
TIME's new cover: Meet this year's #TIME100Health, a community of leaders—scientists, doctors, advocates, educators, and policy-makers, among others—who are changing the health of the world. ti.me/43802LZ
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Proud to share our latest business updates and positive top-line results from our Phase 1 clinical trial of CTX310 targeting ANGPTL3. Congratulations to our team and all who contributed to this milestone! @CRISPRTX
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Samarth Kulkarni retweeted
U.S. leadership in biotech is a national security, economic, and public health imperative. With the attack on science and universities, instability at FDA, & weakening of the capital markets, we are at grave risk of ceding this leadership to China. This must not happen!
The U.S. has long led the world in biotech—driving innovation, saving lives, and fueling our economy and national security. But that leadership is now at risk. @biotech_gov report makes it clear: without bold action, we risk falling behind. Read more: bio.org/press-release/bio-st…
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