What Happens to Options When a Company Merges or Gets Acquired

Corporate mergers and acquisitions trigger adjustments to existing options contracts. The specifics depend on the deal structure—whether it's an all-cash buyout, all-stock merger, or a combination. Understanding these adjustments prevents confusion and helps you make informed decisions about holding through a corporate event.

All-Cash Acquisitions

In an all-cash buyout, the target company's shareholders receive a fixed cash price per share. This is the simplest case for options.

What happens:

When the deal closes, the target company's stock is delisted. Options are adjusted to deliver the cash value per share (the buyout price) instead of shares.

Example: Company ABC is acquired for $50 per share in cash.

  • You own the $45 call. At settlement, this call has $5 of intrinsic value ($50 - $45). You receive $500 per contract.
  • You own the $55 call. This call is OTM (the buyout price is $50, below your $55 strike). It expires worthless.
  • You own the $55 put. This put has $5 of intrinsic value ($55 - $50). You receive $500 per contract.

    • Key implication: Once an all-cash deal is announced and the stock converges to the deal price, time value collapses because the outcome is known. Your ITM options will trade near intrinsic value, and your OTM options will approach zero.

    Deal Spread and Time Value

    Between announcement and close, the stock typically trades slightly below the offer price (say $49.50 vs. $50 offer). This gap reflects the risk that the deal fails. Options retain some time value during this period, but it's minimal compared to normal options pricing.

    All-Stock Mergers

    In an all-stock deal, shareholders of the target company receive shares of the acquiring company at a fixed exchange ratio.

    What happens:

    The OCC adjusts the target company's options to deliver shares of the acquiring company instead, based on the exchange ratio.

    Example: Company ABC is acquired by Company XYZ. Each ABC share converts to 0.8 shares of XYZ.

    Your ABC $100 call is adjusted to:

  • Deliverable: 80 shares of XYZ (100 × 0.8)
  • Strike price: Remains $100
  • The option now references XYZ stock instead of ABC stock

    • If XYZ is trading at $140, your adjusted call's intrinsic value is (80 × $140) - ($100 × 100) = $11,200 - $10,000 = $1,200. Or equivalently, each adjusted option has intrinsic value of $12 per original share.

    These adjusted contracts can be confusing because they deliver a non-standard number of shares. They trade under a modified ticker symbol and tend to become illiquid as volume shifts to standard XYZ options.

    Mixed Consideration (Cash + Stock)

    Many deals involve a combination of cash and stock per share. The OCC adjusts options to reflect the blended deliverable.

    Example: Each ABC share receives $30 cash plus 0.5 shares of XYZ.

    Your ABC option's deliverable becomes:

  • $3,000 cash (100 × $30) plus 50 shares of XYZ (100 × 0.5) per contract
  • Strike price remains unchanged

    • This gets complicated quickly, which is why most traders close their positions before a mixed-consideration deal closes.

    Practical Impact on Your Positions

    Before the Deal Closes

    Long calls on the target: If the deal price is above the current stock price (typical for acquisitions), your calls initially spike in value. But once the stock reaches the deal price, the call's value becomes almost entirely intrinsic. Time value evaporates because everyone knows what the stock will be worth.

    Long puts on the target: Puts collapse in value if the deal is above the current price. The stock jumps to near the deal price, making puts OTM.

    Short options on the target: Short calls that are ITM will likely be assigned. Short OTM puts expire worthless as the stock trades at the elevated deal price. This can actually be favorable for cash-secured put sellers who see their puts become worthless after a buyout announcement.

    After the Deal Closes

    For all-cash deals, ITM options are settled in cash. OTM options expire worthless.

    For stock deals, adjusted options continue trading until expiration, but with reduced liquidity. Most traders should close adjusted positions and open new standard contracts on the surviving company if they want continued exposure.

    What to Do If You Hold Options on a Merger Target

    Step 1: Read the OCC Memo

    The OCC publishes adjustment memos for every corporate action. These detail exactly how your contracts will be modified. Check the OCC website or your broker's corporate actions page.

    Step 2: Assess Your Position

  • ITM options: Likely to retain value through the deal. Consider whether to hold or close.
  • OTM options: May become worthless as the stock converges to the deal price. Consider closing to recover any remaining time value.
  • Short options: Evaluate assignment risk. ITM short options will likely be assigned.

    • Step 3: Decide: Hold or Close

    Close before the deal if:

  • The stock has converged to the deal price and there's no time value left in your options
  • You hold non-standard adjusted contracts that will be illiquid
  • You don't want to deal with the complexity of adjusted deliverables

    • Hold through the deal if:

  • Your options have meaningful intrinsic value
  • It's an all-cash deal and your options are deep ITM (straightforward settlement)
  • You understand the adjusted deliverable and are comfortable with it

    • Step 4: Monitor Deal Risk

    If the deal falls through, the stock typically drops sharply back toward its pre-deal price. Your calls would lose significant value and puts would spike. If you're holding through a pending deal, be aware that regulatory or shareholder approval failures are a real risk.

    The Deal Failure Scenario

    This is the tail risk. If a $50 buyout of a $35 stock fails, the stock might drop back to $35 or lower. Call buyers who paid up for $45 calls when the stock was at $49 would see those calls go from $4+ to near zero.

    Conversely, put buyers who picked up cheap puts during the deal period would see them explode in value. Some traders specifically buy puts on merger targets as a bet on deal failure—it's low probability but high payoff.