Tender Offers and Merger Filings
When one company moves to acquire another, a specific set of filings follows on a defined schedule. The gap between the offer price and the market price is the market's estimate of whether it closes.
MadStockAlerts Research · Updated August 28, 2026
What to take away
- A tender offer is a direct offer to shareholders and is documented on Schedule TO.
- The target's board must respond on Schedule 14D-9 with a recommendation.
- Merger agreements are filed as exhibits to a Form 8-K and contain the real terms.
- The spread to the offer price prices deal risk and time.
- The background section of the merger proxy is unusually candid.
MAD Academy Training Video · 0:45
The Spread Is the Market's Doubt
When a deal is announced the target trades below the offer, and the size of that gap is a live estimate of the odds it closes.
This lesson is part of a Stock Alerts + Tools plan.
The filings
| Filing | Filed by | Contains |
|---|---|---|
| 8-K with merger agreement | Either party | The definitive agreement as an exhibit |
| Schedule TO | The bidder | The terms of a tender offer |
| Schedule 14D-9 | The target's board | Its recommendation and reasoning |
| DEFM14A | The target | The merger proxy, including the background section |
| S-4 | The acquirer | Where stock forms part of the consideration |
The definitive agreement filed as an exhibit is the document that actually governs. Press releases describe a deal; the agreement specifies the conditions under which it happens or does not.
The background section
The merger proxy contains a narrative account of how the transaction came about: who approached whom, what prices were discussed and rejected, and which other parties were contacted.
This section is where a reader learns whether a process was competitive or a single negotiation, and whether the final price was the first offer or the fifth. Both facts bear directly on whether a higher bid might emerge.
It is written to satisfy a legal standard, which is why it is unusually candid: the board is documenting that it discharged its duties, and vagueness would defeat the purpose.
The terms that decide the outcome
- Consideration: cash, stock, or a mix. Stock consideration means the value moves with the acquirer's price.
- Conditions: regulatory approvals, shareholder votes, financing, and any minimum tender condition.
- Termination fees: what either side pays to walk away, which signals how firm the commitment is.
- The outside date: when either party may terminate if the deal has not closed.
- Go-shop or no-shop provisions: whether the target may solicit a higher bid after signing.
A reverse termination fee, payable by the acquirer if regulatory approval fails, is a direct statement of how much risk the acquirer's own lawyers assign to that outcome.
Reading the spread
A target trading below the offer price is being priced for the possibility that the deal does not close, and for the time value of waiting. A wide spread reflects perceived risk, most often regulatory.
A target trading above the offer price means the market expects a higher bid. Both readings are legible without any special access, because the offer price is public and the market price is on the screen.
Scroll the chart sideways to see all of it.
- Offer price
- Target share price
The two structures, and why it matters which
An acquisition of a public company is executed either as a one-step merger or as a tender offer, and the choice changes the timetable, the filings and what a holder is asked to do.
| One-step merger | Tender offer | |
|---|---|---|
| What holders do | Vote at a meeting | Tender their shares, or not |
| Key filing | DEFM14A, a merger proxy | SC TO-T from the bidder, SC 14D-9 from the target |
| Timetable | Months, driven by the proxy process | Minimum 20 business days |
| Threshold | A majority of outstanding shares | A majority tendered, then a back-end merger |
The 14D-9 is the document that repays reading. It contains the board's recommendation, the reasons for it, and the background section describing how the deal came about: who approached whom, what prices were discussed and rejected, and how many other parties were contacted.
The background section is written by lawyers anticipating litigation, which makes it unusually candid. It is one of the few places where the sequence of a negotiation is set out in dates and numbers rather than characterised.
The conditions that decide whether it closes
A merger agreement is a conditional contract, and the conditions are where a deal succeeds or fails. They are listed in the agreement, which is filed as an exhibit, and summarised in the proxy or the 14D-9.
| Condition | What it turns on |
|---|---|
| Shareholder approval | Usually a formality once the board recommends, unless a large holder objects |
| Regulatory clearance | Antitrust review, and sector-specific approvals. The most common cause of failure |
| No material adverse effect | A defined term, and one of the most heavily negotiated in the agreement |
| Financing | Present in some deals and absent in others; its absence is a stronger commitment |
| Outside date | The date after which either party may walk away |
The material adverse effect definition repays reading because it is written in exclusions. Industry-wide downturns, market conditions and changes in law are typically carved out, meaning the buyer cannot walk away because conditions deteriorated generally, only because something specific to the target did.
Break fees are stated in the agreement and run both ways. A reverse termination fee payable by the buyer if regulators block the deal is a direct statement of how likely the parties considered that outcome, priced by people with access to their own counsel.