RUBINSTEIN JULIE sold ~$960K in Adaptive Biotechnologies Corporation stock
Adaptive Biotechnologies Corporation (ADPT) · President · Data via SEC EDGAR Form 4
Price Performance · 10 days before → 90 days after trade
▲ = insider buy date
90-day return
-31.2%vs SPY +7.6%
Trade Details · Public SEC Filing
Insider
RUBINSTEIN JULIE
Role
President
Transaction
Open-Market Sale
Approx. Value
~$960K
Trade Date
Jan 7, 2021
Company
Adaptive Biotechnologies Corporation
Ticker
ADPTSource
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.
~$960K sale
A significant position. Insiders who invest $500K+ of their own money typically have strong views on their company's near-term outlook.
President
Corporate insiders must file trades with the SEC within 2 business days. Their unique access to non-public information makes these filings valuable data points.
-31.2% in 90 days (S&P 500: +7.6%)
This trade underperformed the S&P 500 by 38.8 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 RUBINSTEIN JULIE at picking stocks?
Full track record: win rate, average return, and performance vs S&P 500
On January 7, 2021, RUBINSTEIN JULIE — President of Adaptive Biotechnologies Corporation — filed a Form 4 with the SEC disclosing an open-market sale of approximately ~$960K in Adaptive Biotechnologies Corporation (ADPT) 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, ADPT returned -31.2% versus +7.6% 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 RUBINSTEIN JULIE 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 ADPT Insider Activity
ROBINS CHAD M
Mar 11, 2026
~$33M
STRONG
ROBINS CHAD M
Mar 11, 2026
~$32M
STRONG
RUBINSTEIN JULIE
Mar 11, 2026
~$16M
VS
RUBINSTEIN JULIE
Mar 5, 2026
~$16M
VS
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