WhaleLens: Whale Tracker
NPS & Buffett 13F portfolios
Free · Designed for iPad. Not verified for macOS.
Automatically track the latest filings of Korea's NPS and legendary investors. Get instant Telegram alerts on new disclosures.
"What did Korea's pension giant buy yesterday?"
"Which stock did Warren Buffett add this quarter?"
The answers are all in public filings — scattered across Korea's DART system, SEC EDGAR, and government open-data portals, where almost nobody has time to dig. WhaleLens collects and organizes those filings automatically, putting the moves of Korea's $750B+ National Pension Service (NPS) and the world's legendary investors on a single screen.
■ NPS disclosures, the moment they drop
When NPS crosses or changes a 5%+ stake in a listed company, a mandatory filing is published. WhaleLens collects each filing, lays out the stake change and share count, and tracks the previous report to compute how much was actually bought or sold.
• 5%+ bulk-holding change reports — increases and reductions at a glance
• 10%+ core shareholder reports — real change rates vs. the previous filing
• Telegram channel — instant alerts on new disclosures
■ The full NPS portfolio, made transparent
• Top 200 Korean equity holdings — portfolio weight, per-company stake, year-over-year change
• Per-stock detail pages — multi-year NPS stake history charts
• US equity portfolio from SEC 13F — quarterly share changes, new positions, full exits
■ Quarterly rebalancing of the legends
Track the 13F filings of Warren Buffett (Berkshire Hathaway), Cathie Wood (ARK), Ray Dalio (Bridgewater), Bill Ackman (Pershing Square), Michael Burry (Scion), Stanley Druckenmiller, Seth Klarman and more — ten investors, every quarter.
• What they added, trimmed, opened, and fully exited this quarter
• Pick any stock and see which masters hold it together
■ Smart Money Consensus — an analysis you won't find elsewhere
WhaleLens overlaps the holdings of NPS and the legendary investors — eleven giant funds in total. A stock held by eight institutions at once tells a different story than one held by a single fund. The holder-count ranking surfaces where giant capital agrees.
■ Built for
• Investors who track institutional and pension-fund flows
• Value investors who benchmark the portfolios of Buffett, Dalio, and other masters
• Anyone who wants data-driven judgment without digging through filings
■ Sources and reliability
Korea's DART regulatory filings, SEC EDGAR 13F filings, and Korea's open data portal (NPS) — all official government and regulatory disclosures, refreshed automatically.
※ This is an independent service, not affiliated with the National Pension Service or any government agency. It organizes publicly available filings.
※ Nothing in this app is investment advice. Automated collection may contain errors; investment decisions are your own responsibility.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, SiU Ahn, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SiU Ahn
- Size
- 21.7 MB
- Category
- Finance
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2026 SiU Ahn