RA Capital, a major investor and director, buys another $7.65M in Artiva Biotherapeutics stock
ARTV has more than doubled off its 52-week low of $1.47 on elevated volume (2.4× avg).
Summary
Major institutional investor RA Capital, with board representation, made an additional $7.65 million open market purchase of Artiva Biotherapeutics stock, signaling continued strong conviction.
Key Events · Ownership and Investor Activity · ARTV
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Significant Insider Purchase
RA Capital Healthcare Fund LP, a 10% owner and director, purchased $7,650,148 worth of common stock in open market transactions between June 9 and June 11, 2026.
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Continued Institutional Confidence
This purchase represents a substantial increase in holdings by a major institutional investor, following previous large buys by RA Capital and another 10% owner (GC Corp.) in May.
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Transaction Details
The shares were acquired in three transactions at weighted average prices ranging from $6.91 to $7.91.
Analysis · ARTV · Life Sciences
RA Capital Healthcare Fund LP, a significant institutional investor with board representation, has continued to increase its stake in Artiva Biotherapeutics with a substantial open market purchase of $7.65 million. This follows a previous $100 million purchase by RA Capital in May and another $16.5 million purchase by GC Corp. in late May, indicating strong and sustained institutional confidence in the company.
How filings like this one have moved
In the 30 days to Sep 18, 2026, 40.1% of the 367 measured filings Wiseek scored 9 moved their stock by 5% or more by the next session's close. The median move was -0.64%. 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 $7.60 on NASDAQ in the Life Sciences sector, with a market capitalization of approximately $197.7M. 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.