Thermopylae Holdings Ltd. purchased ~$859K in AbCellera Biologics Inc. stock
AbCellera Biologics Inc. (ABCL) · Data via SEC EDGAR Form 4
Price Performance · 10 days before → 90 days after trade
▲ = insider buy date
90-day return
-26.7%vs SPY +3.4%
Trade Details · Public SEC Filing
Insider
Thermopylae Holdings Ltd.
Role
—
Transaction
Open-Market Purchase
Approx. Value
~$859K
Trade Date
Dec 16, 2022
Company
AbCellera Biologics Inc.
Ticker
ABCLSource
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.
~$859K purchase
A significant position. Insiders who invest $500K+ of their own money typically have strong views on their company's near-term outlook.
-26.7% in 90 days (S&P 500: +3.4%)
This trade underperformed the S&P 500 by 30.1 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 Thermopylae Holdings Ltd. at picking stocks?
Full track record: win rate, average return, and performance vs S&P 500
On December 16, 2022, Thermopylae Holdings Ltd. — a corporate insider at AbCellera Biologics Inc. — filed a Form 4 with the SEC disclosing an open-market purchase of approximately ~$859K in AbCellera Biologics Inc. (ABCL) 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, ABCL returned -26.7% versus +3.4% for the S&P 500 over the same period.
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 ABCL Insider Activity
Booth Andrew
Feb 27, 2026
~$960K
STRONG
Booth Andrew
Feb 26, 2026
~$857K
STRONG
Montalbano John S.
Mar 6, 2025
~$940K
STRONG
Thermopylae Holdings Ltd.
Aug 29, 2024
~$740K
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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