Activist Investor Tracker

Activist Investor Tracker monitors SEC 13D and 13G filings — the mandatory disclosures when an investor acquires more than 5% of a public company. 13D filings signal activist intent (the investor wants to influence management, strategy, or board composition), while 13G filings signal large passive positions. This actor surfaces those filings in real time from SEC EDGAR.

Activist campaigns are among the most reliable short-term price catalysts in public markets — a new 13D from a known activist like Elliott, Starboard, or Carl Icahn often drives 10–30% moves within days.

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Why use Activist Investor Tracker?

1. Trade activist announcements — New 13D filings from prominent activists (Elliott, Starboard, Icahn, Pershing Square) are publicly disclosed the moment they're filed. This actor delivers them as they appear.
2. Merger arbitrage setup — Activists frequently demand strategic alternatives (sale of company, spin-off, CEO change). A 13D is often the first signal before a formal M&A announcement.
3. Track known activists — Filter by investor name to monitor specific activists' current campaigns and track when they build or trim positions.
4. Board/governance research — 13D filings often include a "Purpose of Transaction" section with the activist's demands — governance researchers use these to study shareholder activism.
5. Passive institutional ownership — 13G filings from Vanguard, BlackRock, and State Street reveal when index funds cross the 5% threshold — a liquidity signal for the stock.

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How to use

1. Open the actor on Apify Store and click Try for free.
2. Set includeActivist: true to fetch 13D filings; toggle includePassive for 13G.
3. Optionally set searchTerm to filter by activist name or target company.
4. Click Start. Results are structured filing records linking to SEC EDGAR documents.

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Input

Field	Type	Default	Description
daysBack	number	30	How far back to search SEC EDGAR
includeActivist	boolean	true	Include SC 13D filings (activist intent)
includePassive	boolean	false	Include SC 13G filings (passive large stakes)
searchTerm	string	""	Filter by investor name or target company (e.g. "Elliott", "Disney")
maxResults	number	50	Maximum filings to return

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Output

{
  "filer": "Elliott Investment Management L.P.",
  "form_type": "SC 13D",
  "filing_type": "activist",
  "target_company": "Southwest Airlines Co.",
  "stake_pct": 11.3,
  "filed_date": "2026-08-15",
  "accession_no": "0000912057-26-009123",
  "filing_url": "https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=..."
}

{
  "filer": "The Vanguard Group, Inc.",
  "form_type": "SC 13G/A",
  "filing_type": "passive",
  "target_company": "Apple Inc.",
  "stake_pct": 8.7,
  "filed_date": "2026-02-12",
  "accession_no": "0000913828-26-000044",
  "filing_url": "https://www.sec.gov/cgi-bin/browse-edgar?..."
}

Output fields

Field	Type	Description
filer	string	Investor or entity name filing the form
form_type	string	SC 13D, SC 13D/A, SC 13G, or SC 13G/A
filing_type	string	activist (13D) or passive (13G)
target_company	string	Company being invested in
stake_pct	float	Ownership percentage disclosed
filed_date	string	SEC filing date (YYYY-MM-DD)
accession_no	string	SEC EDGAR accession number
filing_url	string	Direct link to the SEC filing

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Filing types explained

Filing	Type	Meaning	Price impact
SC 13D	Activist	>5% stake WITH intent to influence	Often +5–25% on filing
SC 13D/A	Amendment	Update to 13D (position change or demand)	Variable
SC 13G	Passive	>5% stake, passive investor	Modest positive
SC 13G/A	Amendment	Position update for passive filing	Minimal

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Notable activist investors to track

Activist	Known for
Elliott Investment Management	Aggressive campaigns, M&A pressure
Starboard Value	Operational improvement, CEO changes
Carl Icahn	Board seats, asset sales
Pershing Square (Ackman)	Large concentrated bets, public commentary
ValueAct Capital	Behind-the-scenes engagement
Third Point (Loeb)	Spin-offs, strategic alternatives

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Cost estimation

Pay-Per-Event: $0.005 per actor start + $0.02 per filing returned.

Use case	Records	Estimated cost
30-day activist campaigns	~20–50	$0.40–$1.00/run
90-day all 13D filings	~60–150	$1.20–$3.00/run
Daily monitoring	~2–8/day	$0.04–$0.16/day
Specific activist search	~5–20	$0.10–$0.40/run

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FAQ

How quickly does a 13D appear after the stake is acquired? SEC rules require 13D filing within 10 days of crossing the 5% threshold. 13G requires filing within 45 days of calendar year end (or 10 days of crossing 5% during the year).

Does it detect when an activist reduces their position? Yes — 13D/A amendments are included, which disclose both increases and decreases in position size.

Can I track a specific target company? Yes — use searchTerm: "Disney" or any other company name to filter for filings involving that target.

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Related actors

• M&A Deals Tracker — M&A deals that often follow activist campaigns
• Executive Compensation Tracker — Activists often challenge executive pay; check comp data
• Secondary Offering Tracker — Activists sometimes force secondary offerings

Feedback

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Keywords: activist investor, SEC 13D filing, 13G filing, large stake disclosure, shareholder activism, SEC EDGAR, corporate governance, institutional investor, hedge fund tracker, proxy fight, activist campaign, stock stake, public company disclosure, investment watchlist, equity stake tracker