BAKER BROS. ADVISORS LP purchased ~$676M in Kymera Therapeutics, Inc. stock
Kymera Therapeutics, Inc. (KYMR) · Data via SEC EDGAR Form 4
Price Performance · 10 days before → 90 days after trade
▲ = insider buy date
90-day return
-7.2%
Trade Details · Public SEC Filing
Insider
BAKER BROS. ADVISORS LP
Role
—
Transaction
Open-Market Purchase
Approx. Value
~$676M
Trade Date
Dec 11, 2025
Company
Kymera Therapeutics, Inc.
Ticker
KYMRSource
SEC EDGAR Form 4
Why This Trade Stands Out
Very Strong conviction signal
Scored in the top tier across multiple factors. Fewer than 5% of insider trades receive this rating.
~$676M 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.
-7.2% in 90 days
Measured from trade date to 90 days later. We track the performance of every insider trade to identify which insiders consistently make profitable moves.
How good is BAKER BROS. ADVISORS LP at picking stocks?
Full track record: win rate, average return, and performance vs S&P 500
On December 11, 2025, BAKER BROS. ADVISORS LP — a corporate insider at Kymera Therapeutics, Inc. — filed a Form 4 with the SEC disclosing an open-market purchase of approximately ~$676M in Kymera Therapeutics, Inc. (KYMR) stock.
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, KYMR returned -7.2%
VeritySignals Conviction Analysis
Full Conviction Analysis
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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 KYMR Insider Activity
Jacobs Bruce N.
Mar 4, 2026
~$5.0M
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Jacobs Bruce N.
Mar 2, 2026
~$2.5M
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BAKER BROS. ADVISORS LP
Dec 11, 2025
~$172M
STRONG
BVF PARTNERS L P/IL
Jun 30, 2025
~$43M
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.
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