RA Capital, a 10% owner and director, makes $4.6M open market purchase of Artiva Biotherapeutics stock.
ARTV has more than doubled off its 52-week low of $1.47.
Summary
RA Capital, a major institutional investor and director, further increased its stake in Artiva Biotherapeutics with a $4.6 million open market purchase, signaling strong confidence.
Key Events · Ownership and Investor Activity · ARTV
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Significant Insider Purchase
RA Capital, a 10% owner and director, acquired $4,599,903 worth of common stock through open market purchases between June 12 and June 16, 2026.
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Material Stake Increase
The purchase represents over 2% of Artiva Biotherapeutics' market capitalization, reinforcing RA Capital's position as a key investor.
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Continued Accumulation
This transaction extends a pattern of substantial accumulation by RA Capital and other major shareholders, following recent positive clinical data and a $300 million offering.
Analysis · ARTV · Life Sciences
This $4.6 million open market purchase by RA Capital, a major institutional investor with board representation, represents over 2% of Artiva Biotherapeutics' market capitalization. It signifies strong conviction in the company's future, especially as it follows recent positive clinical data and a significant capital raise. This continued accumulation by a key insider group reinforces investor confidence.
How filings like this one have moved
In the 30 days to Sep 19, 2026, 39.3% of the 356 measured filings Wiseek scored 9 moved their stock by 5% or more by the next session's close. The median move was -0.47%. These are measured outcomes after filings of this importance, not a forecast for this one.
Measured one observation per ticker per day, after exclusions. Current figures: Filing Impact Tracker · open dataset
At the time of this filing, ARTV was trading at $8.90 on NASDAQ in the Life Sciences sector, with a market capitalization of approximately $220.2M. The 52-week trading range was $1.47 to $14.53. This filing was assessed with positive market sentiment and an importance score of 9 out of 10.