Precedent transactions

Precedent transactions measure what acquirers actually paid for whole companies, typically 20-40% above the pre-announcement trading price for control and synergies, and the gap between that and trading comps is itself one of the most informative numbers in finance.

Trading comps measure what minority investors pay for small pieces of companies. Precedent transactions measure what acquirers paid for entire ones. Those are different products with different prices, and the gap between them is itself one of the most informative numbers in finance.

Why deals price higher: control and synergies

Buyers of whole companies routinely pay 20-40% above the pre-announcement trading price. Two rational reasons stack:

Control. Owning all of it means choosing management, strategy, capital allocation and the sale of assets. Control has value a minority share lacks, so it costs more.
Synergies. A strategic buyer can cut duplicate costs and cross-sell. Part of that expected value gets competed away to the seller in the auction, which is why strategic buyers outbid financial buyers in most processes.

The anatomy of a deal price

deal price = standalone trading value
           + control premium
           + share of expected synergies competed away to the seller

which is why precedent multiples > trading multiples for the same assets,
and why the two methods form separate bars on a football field

The mechanics

Structurally identical to trading comps, with deal metadata replacing market quotes: collect comparable acquisitions, compute the multiple each buyer paid (EV/EBITDA and EV/revenue dominate, since post-deal earnings structures differ), take the median and quartiles, apply to the subject.

Deal EV is the offer for the equity at the announced price plus assumed net debt.
The denominator is the target's LAST TWELVE MONTHS at announcement, normalized, never post-deal projections.
The premium is measured against the UNAFFECTED price: the quote before leaks and speculation started moving it, which announcements themselves often state.

Where the numbers come from

Deal terms are public record when either side is public: the 8-K announcing the agreement, the merger proxy (DEFM14A) with the board's own bankers' fairness analysis inside it, and tender offer documents. The fairness opinion exhibits are an underused gift: they show the comps, precedents and DCF the sell-side bankers ran, with their peer lists and assumptions, filed for anyone to read.

Selecting precedents: recency beats quantity

Screen	Why it binds
Same subsector and business model	A payments deal tells you little about a grocer
Last 3-5 years, ideally fewer	Deal pricing moves with rate cycles and sentiment; a 2021 multiple describes 2021
Similar size	Scale changes both premium and multiple
Buyer type noted	Strategic vs financial buyers pay systematically differently
Process noted	A contested auction prices differently than a negotiated take-private

Old deals import old markets

The most common abuse of precedents is reaching back a decade to find a high multiple and presenting it as evidence. Every deal multiple embeds the financing conditions and optimism of its moment. A precedent set that mixes 2021 money with 2025 money is not a range, it is a time machine with the label torn off. Date every deal, and weight recent ones.

What the method is actually for

M&A pricing. The primary tool when advising either side of a sale: what similar assets have cleared at is the negotiation's shared reference.
The acquisition case in an investment thesis. For a public stock, precedents answer: if this were acquired, at what price? The gap between trading and deal value is the activist's and arbitrageur's raw material.
The ceiling bar on the football field. Because of the premium, precedents usually mark the top of the valuation ranges, and a stock trading THROUGH its precedent range needs an unusual explanation.

Limits

Scarcity. Good subsector precedents can number two or three; the honest response is wide ranges and adjustment, not false confidence.
Survivor bias in synergies. Deal prices record what buyers HOPED synergies were worth; studies find realized synergies routinely disappoint, so deal multiples encode optimism.
Not a standalone value. A company with no plausible buyer does not get to claim its precedent multiple. The method prices an event, and the event needs a probability.

Glossary for this guide

Control premium: The excess over the trading price a buyer pays for a whole company, historically 20-40%. Control of strategy, management and capital is worth more than a minority ride.
Synergies: The cost cuts and revenue gains a buyer expects from combining companies. Part of their expected value is competed away to the seller in an auction, which is why deal prices embed optimism the combined company must then deliver.
Unaffected price: The target's stock price before leaks and speculation began moving it toward a rumored deal. Premiums are measured against it, since the price the day before signing already contains half the news.
Strategic vs financial buyer: A strategic buyer operates in the industry and can pay for synergies; a financial buyer (private equity) pays what leverage and exit multiples justify. Strategics usually outbid, which is why the buyer mix in a precedent set matters.
Fairness opinion: The valuation a target board's bankers file inside the merger proxy attesting the price is fair. Its exhibits disclose the bankers' own comps, precedents and DCF assumptions: a complete worked valuation, public for anyone to read.
Merger proxy: The filing shareholders receive before voting on a deal: background of the negotiation, the price's justification, and the fairness opinion. The primary source on how real acquisitions get priced.
LTM (last twelve months): The trailing year of financials, stitched from the latest filings. Deal multiples are computed on the target's LTM at announcement, never on projections the buyer hoped for.
Enterprise value: The value of the whole operating business, belonging to debt and equity holders together. Market capitalization plus net debt (plus minority interests and preferred stock, when present).
Football field: The one-page chart bankers use to lay valuation ranges from every method (DCF, trading comps, precedent transactions) side by side as horizontal bars. Where the bars overlap is where conviction lives.