RA CAPITAL MANAGEMENT, L.P. purchased ~$165M in Artiva Biotherapeutics, Inc. stock
Artiva Biotherapeutics, Inc. (ARTV) · Data via SEC EDGAR Form 4
Price Performance · 10 days before → 90 days after trade
▲ = insider buy date
90-day return
-11.0%vs SPY +5.5%
Trade Details · Public SEC Filing
Insider
RA CAPITAL MANAGEMENT, L.P.
Role
—
Transaction
Open-Market Purchase
Approx. Value
~$165M
Trade Date
Jul 22, 2024
Company
Artiva Biotherapeutics, Inc.
Ticker
ARTVSource
SEC EDGAR Form 4
Why This Trade Stands Out
Strong conviction signal
Scored above average across multiple factors. Roughly 15% of insider trades qualify as Strong.
~$165M purchase
Trades over $1M are rare. When insiders put this much of their own money on the line, they tend to have high conviction in their company's direction.
5 insiders traded in the same window
When multiple insiders independently buy within 30 days, it's called a cluster. Studies show clustered insider purchases outperform solo trades significantly, because several people with inside knowledge are reaching the same conclusion.
-11.0% in 90 days (S&P 500: +5.5%)
This trade underperformed the S&P 500 by 16.5 percentage points. Not every insider trade wins. We track all of them so you can focus on the insiders with the best records.
How good is RA CAPITAL MANAGEMENT, L.P. at picking stocks?
Full track record: win rate, average return, and performance vs S&P 500
RA CAPITAL MANAGEMENT, L.P. wasn't the only one buying.
5 insiders at Artiva Biotherapeutics, Inc. traded within the same 30-day window.
See who else bought · FreeOn July 22, 2024, RA CAPITAL MANAGEMENT, L.P. — a corporate insider at Artiva Biotherapeutics, Inc. — filed a Form 4 with the SEC disclosing an open-market purchase of approximately ~$165M in Artiva Biotherapeutics, Inc. (ARTV) stock.
This transaction was part of a cluster — 5 insiders at Artiva Biotherapeutics, Inc. made open-market purchases within the same 30-day window. Cluster activity from multiple independent insiders is one of the most studied patterns in insider trading research.
Under Section 16(a) of the Securities Exchange Act of 1934, corporate insiders must report all open-market stock transactions to the SEC within two business days. These filings — known as Form 4s — are publicly available on the SEC's EDGAR database. VeritySignals filters and scores the full Form 4 stream to surface high-conviction signals like this one.
In the 90 days following this trade, ARTV returned -11.0% versus +5.5% for the S&P 500 over the same period.
VeritySignals Conviction Analysis
Full Conviction Analysis
Sign up free to see signal strength details, or upgrade for the full 15-factor breakdown.
Get notified the next time RA CAPITAL MANAGEMENT, L.P. trades
Free alerts · No credit card · Instant notification
All data sourced from publicly available SEC Form 4 filings via EDGAR · Not financial advice · Past performance does not guarantee future results.
At a Glance
More ARTV Insider Activity
Aslan Fred
May 19, 2026
~$956K
STRONG
Aslan Fred
May 19, 2026
~$956K
STRONG
RA CAPITAL MANAGEMENT, L.P.
May 11, 2026
~$274M
STRONG
How to Read Insider Trades
What is this?
When company executives buy or sell their own stock, they must report it to the SEC within 2 days. These public filings reveal what the people who know the company best are doing with their own money.
Why does it matter?
Insiders can sell for many reasons (taxes, diversification, expenses), but they generally only buy for one: they think the stock is going up. That's why insider purchases are more predictive than sales.
What makes a trade "strong"?
We score trades on 15+ factors: the insider's role (CEO > director), trade size relative to their salary, whether other insiders also bought (clusters), and historical accuracy of the insider.
Never miss a signal
Get notified when high-conviction insiders buy. Free account, no credit card.
Sign up free