Coming soon

Coming soon

Insights Investors Congress Watchlist

© 2026 StockSpill. Data from SEC EDGAR filings. Logos by Parqet.

Read terms Read privacy policy

Home Insights Congress Investors Profile

Home › Superinvestors › Activist investors

Best activist investors — superinvestor list

Activist investors who take concentrated public positions in undervalued companies and push for change.

Pershing Square Capital Management, L.P.

Concentrated activist investor who takes massive public positions and fights loudly for change. High-conviction, long holding periods, not afraid to be wrong loudly.

$15.5B disclosed AUM

Tracked via SEC 13F filings.

$8.4B disclosed AUM

Third Point LLC

Activist investor with a sharp tongue and sharper analysis. Targets underperforming companies, takes concentrated positions, and pushes loudly for change — spin-offs, board shakeups, CEO replacements. Famous for devastating shareholder letters.

$7.3B disclosed AUM

Greenlight Capital Inc

Value-oriented hedge fund manager famous for his rigorous short-selling research. His public takedowns — Lehman Brothers, Allied Capital — became landmark Wall Street moments. Runs a long/short book with deep fundamental analysis.

$2.0B disclosed AUM

Other strategies

Browse by strategy

Value investing
Global macro investors
Growth & disruptive investors
Quality compounders
Concentrated portfolio investors

What is activist investors?

Activist investors who take concentrated public positions in undervalued companies and push for change.

This list is curated based on each investor's public statements, fund mandate, and disclosed 13F portfolios. Click any card above to see the full live holdings, biggest buys, exits, and quarter-by-quarter history.