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Activist Stakes Tracker

When any investor crosses 5% ownership of a public company, they must file with the SEC within 10 days. A Schedule 13D means they intend to influence the company — activist campaigns, board fights, strategic reviews. A Schedule 13G means passive accumulation. Both filings reveal large, concentrated bets by sophisticated capital allocators before the market fully prices them in.

How to Read This Data

13D
Activist intent. The filer plans to influence the company — push for board seats, strategic alternatives, spin-offs, or management changes. These are catalysts.
13G
Passive accumulation. The filer owns 5%+ but has no activist intent. Often institutional investors building large positions quietly.
10%+
Dominant position. Stakes above 10% give significant voting power and often precede major corporate actions — mergers, tender offers, or going-private transactions.
/A
Amendment. Updates to a previous filing — stake size changed (increased or decreased), or the filer switched between passive (13G) and activist (13D) status.
Why it matters: 13D filings are among the highest-signal SEC disclosures. When an activist fund files a 13D, the stock often reprices 5-15% within days. Even passive 13G filings reveal where large allocators see deep value. This tracker surfaces these filings within hours of SEC publication.
Total Filings
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Activist (13D)
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Intent to influence
Passive (13G)
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5%+ accumulation
With Ownership %
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Last Updated
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Data Source & Methodology

Source: SEC EDGAR — Schedule 13D and 13G filings. Any person or group acquiring beneficial ownership of more than 5% of a class of equity securities registered under Section 13(d) of the Securities Exchange Act must file within 10 business days.

13D vs 13G: Schedule 13D is required when the filer has an activist purpose (influencing management or control). Schedule 13G is a shorter form available to passive investors, institutional investors, and exempt persons. A filer can switch from 13G to 13D if their intentions change — this conversion is itself a strong catalyst.

Ownership parsing: Ownership percentages and share counts are extracted from the filing XML where available. Some older or non-standard filings may not include machine-readable ownership data.

Limitations: There is a 10-day filing window, so the actual accumulation may have occurred earlier. Amendments (/A) update previous filings but do not always indicate a change in position size.