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Choose the investors and stocks that matter to you. MarketInsiderLab monitors new filings, identifies important moves, and sends you the verified context so you can quickly decide what deserves your attention.
Email alerts · Track up to 25 investors and stocks
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Choose what matters. Pro monitors the filings.
Example selections. You choose your own Track list.
THE PRO OUTCOME
See what changed. Understand what it could mean.
Pro brings relevant filing changes to your inbox, with historical context when the evidence supports it. See whether an investor is continuing a pattern, reversing direction or reporting a change in ownership intent.
Spend less time finding the change and more time assessing what may be developing.
Monitoring between quarterly reports
- 13FQuarterly reportReported holdings and position changes
- 13D / 13GOwnership updateA relevant filing can trigger an alert between reports
- 13FNext quarterly reportThe next portfolio snapshot
Illustrative sequence. Alerts depend on supported filings and verified changes; they do not follow a fixed schedule.
POSITION CHANGE · ARK INVESTMENT MANAGEMENT
Palantir: an increase after three quarterly reductions
What changed
ARK reported 3,212,286 Palantir shares for Q2 2026, up 102,405 shares (+3.29%) from Q1.
The reported share count had fallen in each of the previous three quarter-to-quarter comparisons. Q2 changed that direction.
2.43% of the reported portfolio · Position rank #11
What to watch next
Whether the next reported quarter continues the increase. Quarterly snapshots do not establish exact trade dates or explain the manager’s intent.
Illustrative alert layout using historical backend data. Report period: June 30, 2026; filed August 14, 2026. Not a recently delivered email. Available context varies with the evidence.
A change in plans, not just a change in shares
Trian × Wendy’s: In May 2022, the filing persons said they would explore a potential transaction. Their January 2023 amendment said they would not propose it at that time, supporting buybacks and dividends instead.
Read Item 4 in the SEC filing →
Source-checked historical research example; not a current signal or a claim that this email was sent.
You choose what reaches your inbox
Important changes or all verified changes within your selected event types.
New positions and re-entries, full exits, increases, reductions, quarterly 13F updates and 13D/13G ownership disclosures.
Immediate emails after processing, or a daily digest at 07:00 UTC.
Pause email alerts or mute an individual tracked investor or stock.
Settings apply to future alerts. “Immediate” is a delivery preference, not a promise of instant delivery after SEC publication.
WHAT PRO ADDS
A monitoring layer built on the research you can already inspect.
Track notable investors
Choose investors such as Cathie Wood, Bill Ackman and Daniel Loeb, and get alerts about supported portfolio and ownership changes connected to them.
Track stocks in context
Monitor a stock across notable investor activity and ownership filings instead of watching one portfolio in isolation.
Understand why it stands out
Understand the change in context: position size, repeated buying or selling, and verified changes in ownership intent. Context is included only where the source and available history support it.
CLEAR UPGRADE VALUE
Free lets you check. Pro checks for you.
MarketInsiderLab does not put public evidence behind a paywall. Pro is the time-saving monitoring service built on top of it. Visitors can run one successful distinct Decode before creating a Free account.
*Unlimited Decode access is subject to fair-use safeguards.
START MONITORING
Stop checking. Start tracking.
Choose the investors and stocks that deserve your attention. Get relevant filing alerts with the context to decide what deserves your attention, without rebuilding the research from scratch.
No annual commitment. Manage or cancel securely through Stripe.
Including 25% Norwegian VAT
✓ Track up to 25 investors and stocks
✓ Personalized email alerts
✓ Source-verified alert context
✓ Secure billing and self-service cancellation
Independent research, not investment advice. Coverage depends on eligible processed filings.
BEFORE YOU START
Clear answers, before checkout.
What is the difference between Save and Track?
Save is a free bookmark. Track is Pro monitoring: MarketInsiderLab checks your selected research for eligible changes and can alert you.
What can I Track?
You can build a Track list of up to 25 supported investors and stocks. The available Track button on public research pages shows what can currently be monitored.
Will my selected investor or stock be remembered?
Yes. When you arrive from a Track button, your selection is kept through sign-in and checkout and is added after Pro activation.
Does every SEC filing create an alert?
No. An alert requires a supported filing, a verified change and a match to your Track list. Not every filing produces an alert, and filings do not reveal every trade as it happens.
Can I cancel?
Yes. You can manage or cancel your subscription through the secure Stripe customer portal.
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