Skip to content
Equity Capital Market
  • Privacy Policy
  • Start Here
  • Research
    • LPTH case study
    • PLUG case study
    • STDN case study
  • IPO & Public Offerings
  • Economy & Macro
  • Latest
  • Stock Market
  • Market Education
  • Energy & Commodities
  • Capital Markets
  • Federal Reserve & Rates
  • About
  • Contact
  • Guides
    • Options guides
    • Bonds & Rates guides
    • Valuation guides
    • IPOs guides

hostile takeover

Poison Pill Explained: How Shareholder Rights Plans Work

September 12, 2026July 31, 2026 by Bruno M.
Poison Pill Explained: How Shareholder Rights Plans Work

What is a poison pill? How the flip-in, flip-over, and trigger thresholds work — plus the Twitter, Airgas, and Household cases every investor should know.

Categories Defense, Market Education Tags capital markets, corporate governance, hostile takeover, m&a defense, poison pill, shareholder rights plan

Explore ECMSource

New here? Begin with our guide to the site, then explore the subjects that match what you want to understand.

  • Start Here
  • Market Education
  • Stock Market
  • Capital Markets
  • Federal Reserve & Rates

Recent Posts

  • Rocket Lab Q3 2026: Backlog Hits $3.6B as Space Systems Scales
  • Growth vs. Value Stocks: Cash Flow Duration and P/E Math
  • Apple Prices $7.5B Notes Across Seven Tranches
  • McDonald’s Operating Profit Rises 7% on Value Meals Push
  • SPY vs. VOO: Why Fund Structure, Cash Drag, and Fees Differ

Subscribe to Our Newsletter

Oh hi there 👋
It’s nice to meet you.

Sign up to receive awesome content in your inbox, every month.

We don’t spam! Read our privacy policy for more info.

Check your inbox or spam folder to confirm your subscription.

  • Privacy Policy
  • Editorial Policy
  • Corrections Policy
  • Financial Disclaimer
  • Contact
  • About Bruno M.
  • Investor Tools
© 2026 Equity Capital Market • Built with GeneratePress