Best M&A Advisory Firms in 2026: 13 Compared and Ranked

M&A advisory firms run the sale or purchase of a company for its owner: they value it, find the other side and run the process through to signing. Of the thirteen compared here, spectup is the best pick for a low or mid-market owner, CEO or CFO who wants the buyer list built per transaction and every name approved.

spectup runs M&A advisory on one side of the transaction. The twelve other M&A firms are ranked by the same five checks, read from each firm's own pages.

What do M&A advisory firms sell?

Mergers and acquisitions advisory firms sell two jobs, a sale and a purchase, and differ mainly in who stands behind them:

• Banks owned by or affiliated with a bank or an accounting group: Capstone Partners, Clearsight Advisors, Harris Williams and PMCF.
• Listed banks: Houlihan Lokey (more than 1,900 financial professionals) and Lincoln International (more than 1,400 professionals).
• Independent or employee-owned banks: Baird, Livingstone Partners and William Blair.
• Firms that state no owner: Hyde Park Capital and Stout.
• A network of independent member firms: Oaklins, where the member firm in your country does the work.
• One private capital advisory firm: spectup, which runs M&A on one side and raises capital from the same desk.

A sell-side advisor acts for the seller and a buy-side advisor for the buyer, and the two are different engagements with different fees. The five checks apply to either. A broker who sells small businesses for a commission and a deal marketplace that lists firms are different services, and neither is compared here.

How we compared the thirteen M&A advisory firms

Most lists of the best M&A advisory firms rank by size or deal count, and the top M&A advisory firms on them are the largest banks.

Few of these M&A firms publish what an owner can compare, so this page ranks by what an owner can check before the first call. spectup ranks first because it is the one firm that scores the full two points on all five checks, ten of ten. Each check can be confirmed from a firm's own pages before the first call, and is worth 0, 1 or 2 points:

1. Buyer list, how it is built: no description, or relationships named with nothing more, is 0; a buyer universe the firm already holds is 1; a list built for each transaction and approved by the owner before anyone is contacted is 2.
2. Buyer data of its own: none described is 0; a database, or buyer criteria and behaviour the firm says it tracks, is 1; its own database built from its transactions, with what each buyer has bought and at what size, is 2.
3. Timing from live signals: no timing or a fixed list is 0; buyers chosen on recent deals or stated criteria is 1; a call timed to the week a buyer shows it is acquiring is 2.
4. Its own channel to buyers: nothing published is 0; insights or a newsletter with no stated audience is 1; a newsletter or podcast with a stated audience of financial decision makers is 2.
5. Deals closed, in figures: no named transaction is 0; named transactions, or a total or a count but not both, is 1; a total value and a count of its advisory transactions is 2. A total that covers capital raising alone earns 1.

7 columns. Drag the table sideways; the first column stays put.

When two firms tie on points, the higher review score on Clutch or Trustpilot with five or more reviews decides. On 2 Nov 2026 none of the tied firms had five reviews on the profiles read, so ties stay alphabetical.

Capstone Partners and Houlihan Lokey share five points; Harris Williams, Hyde Park Capital, PMCF and Stout share four; Clearsight Advisors, Lincoln International and Oaklins share three. Baird, William Blair and Livingstone Partners each have a total no other firm shares.

The scores measure what a firm shows on its own pages. A firm that publishes little can still be among the best M&A advisory firms for your sale or purchase, so use the scores to decide whom to ask for proof.

Three names often listed with M&A advisory firms are left out: BD Emerson, which sells diligence and integration work and names no advised transaction; MarshBerry, which its own page says Lincoln International has acquired and whose M&A pages speak to insurance, wealth and accounting firms; and Morrissey Goodale, whose M&A pages could not be read for this edition.

1. spectup: a buyer list built per transaction and approved by the owner

spectup is a private capital advisory firm that advises on buy-side and sell-side M&A and raises capital for companies and funds. It works one side of a transaction and brings the other to the table: for a sale it acts for the seller and is paid by the seller, and for a purchase it acts for the acquirer only.

On a sale it builds the acquirer list for each transaction, across strategics and funds, and the owner approves every name before anyone is contacted.

It checks the list against data from its own closed transactions, what each acquirer has bought and at what size, and its in-house signal engine flags the week an acquirer becomes a buyer. On a purchase it researches each owner and calls when something opens the door to a sale.

It reaches 2,000 B2B financial decision makers through its own newsletter and runs a podcast with 8,000 listeners. The $150M+ counts M&A only; the 150+ transactions since 2022 cover capital raising and M&A together.

2. Baird, an employee-owned bank with a sponsor database

Baird is the investment banking division of a broker-dealer founded in 1919 and headquartered in Milwaukee. The firm calls itself privately held and employee-owned, with industry bankers covering more than 50 sectors.

Its Financial Sponsors Group says it keeps a proprietary database of its sponsor network, built from its own meetings and processes. Its transactions page counts 1.1K+ transactions and $546B+ of deal value since 2021, for M&A and capital markets together.

Its sponsor group says it understands each sponsor's current fund status, yet nothing on its pages says an approach is timed to it, which holds timing at one point.

3. William Blair, an independent partnership with a printed M&A record

William Blair is an independent, employee-owned partnership founded in 1935 and based in Chicago. Its M&A pages list sell-side, divestiture and acquisition advice, and its investment banking group publishes insights and a podcast, with no audience stated.

It counts over 310 sales to financial sponsors in five years and says they give it proprietary insight into each sponsor's criteria and behaviour. Its M&A page prints over 917 M&A transactions and approximately $576 billion in value since September 2021, which includes large and public-company deals.

Its record earns the full two points, a total and a count printed together; its data and timing rest on what it says it knows about sponsors.

4. Capstone Partners, a middle-market bank owned by a bank

Capstone Partners is a middle-market investment bank headquartered in Boston, with 14 offices in the US and bankers who each specialise by industry and sector. Its broker-dealer is a subsidiary of Huntington Bancshares, and its contact page invites owners with EBITDA above $10 million.

It names a network of strategic and financial acquirers, and its sponsor team says it captures proprietary data on each private equity firm's criteria and buying patterns. Its homepage counts 750+ deals completed; the $20 billion on its placements page is capital raised.

It counts deals but not the value advised, so its record earns one of two points, and each of its other four checks earns one.

5. Houlihan Lokey, a listed bank with a ranked M&A count

Houlihan Lokey is a global independent investment bank listed on the NYSE as HLI, founded in 1972 and headquartered in Los Angeles, with M&A in its Corporate Finance segment. Its annual report counts more than 1,900 financial professionals and says a majority of Corporate Finance engagements are mid-cap.

Its M&A page says LSEG ranked it first for all global M&A transactions in 2025, with 458 deals, ahead of Goldman Sachs with 441 and Rothschild with 400 in its table of top M&A advisory firms. It names closed deals with the side it advised. Its financial sponsors page counts about 2,000+ relationships and says it holds extensive information on their buying behaviour.

It prints no total value of M&A advised and describes no database or live signal behind that behaviour, so it scores one point on each check.

6. Harris Williams, a global bank organised in eight industry groups

Harris Williams is a global investment bank for M&A and private capital advice and, like Capstone Partners, owned by a bank, with eight industry groups and clients in over 30 countries. FINRA BrokerCheck lists it as a subsidiary of PNC Bank, and its London entity is regulated by the Financial Conduct Authority.

It says it has worked with hundreds of global private equity groups and monitors thousands of buyer discussions each year. Its client pages name deals, such as Trinity Consultants acquired by Veritas Capital, and print no amount and no side.

Nothing on its pages ties an approach to a buyer's criteria or signals, which leaves timing at zero.

7. Hyde Park Capital, a boutique with a stated size band

Hyde Park Capital is a boutique middle-market investment bank founded in 2000, headquartered in Tampa with offices in Nashville, San Francisco and West Palm Beach. Its FAQ says it generally executes M&A transactions from about $20 million to $500 million+ of enterprise value.

Fees are primarily success-based on closing with a modest retainer, with no percentages. It counts more than 300 M&A transactions and over $11 billion in enterprise value since 2000.

That record is its strongest check; its pages describe no buyer data and no timing from buyer signals.

8. PMCF, the bank affiliated with an accounting firm

PMCF is the investment banking affiliate of Plante Moran, an accounting and consulting firm, the only one of these M&A advisory firms attached to an accounting practice, with offices in Chicago, Detroit, Denver and Grand Rapids and 27 international cities through Corporate Finance International.

Its sell-side page names industry-focused strategic and private equity buyers, and its buy-side page cites proprietary research tools without saying what they hold. It names closed deals, such as the sale of Metal Center, Inc. in October 2026, with no amounts and no total.

Those two gaps, the tools with no stated contents and the deals with no amounts, hold buyer data and its record at one point each.

9. Stout, valuation and disputes next to M&A

Stout is a global advisory firm in valuation, disputes and transactions, founded in 1991 and headquartered in Chicago, with its investment banking group established in 1997. It advises family-owned businesses, private equity portfolio companies and divisions of large corporates on sales.

It says it identifies likely strategic and financial buyers for each situation using its resources and databases, with no source or contents given. It has completed transactions in more than 80 countries.

It prints no total value and no count of transactions, and says nothing about what its databases hold, so its data and its record each earn one point.

10. Clearsight Advisors, the specialist in business services and technology-enabled services

Clearsight Advisors is an investment bank focused on business services and technology-enabled services, founded in 2011 and headquartered in McLean, Virginia. It is a wholly owned subsidiary of Regions Financial Corporation.

It calls its relationships unmatched, with no number, no buyer group and no per-deal list described. Its CEO letter counts more than 170 transactions totaling over $20B since its founding, while its 2026 summary PDF says 165+ deals.

Nothing on its M&A pages says how it finds a buyer, so its points rest on its record and its sector monitors.

11. Lincoln International, a listed bank for the private capital markets

Lincoln International is a global advisory firm focused on the private capital markets and, with Houlihan Lokey, one of the two M&A advisory firms here that trade on the NYSE, as LCLN, headquartered in Chicago, with more than 1,400 professionals in more than 30 offices in 14 countries.

It names its private equity relationships as a buyer group; the proprietary database it cites feeds its private market valuations index, and no record of what buyers have bought is described. It counts 3,800+ conference attendees in 2025 and prints no total value and no count of transactions.

Buyer data and timing score nothing; the rest comes from a named buyer group, its newsletters and its named deals.

12. Oaklins, a network of independent member firms

Oaklins is the only network among these M&A advisory firms: a global group of independent mid-market M&A and corporate finance firms under one brand. Its member firms advise clients, each separately regulated where it operates, with advisory teams in 40 countries and 900+ advisors.

It names the buyer groups it reaches, strategic acquirors, financial sponsors and cross-border buyers, and attributes its buyer knowledge to local teams. By its own count it closed 1,900 deals in the past five years, without a total value.

Buyer data and timing score zero at group level, because the group pages leave both to the member firms.

13. Livingstone Partners, the cross-border mid-market partnership

Livingstone Partners is an independent, global, mid-market investment bank providing M&A and debt advisory, with more than 155 professionals in 15 offices in Europe, the United States and Asia.

It says it completes more than 85 transactions a year, valued between €25 million and €500 million, with about three in five crossing borders. Its global reach page cites long-standing relationships across North America, Europe and Asia, with no number, no database and no approval step stated.

Its insights section and its count of transactions are where it scores.

How spectup finds buyers and times the call

spectup is the one firm here that states the owner approves every name on the acquirer list before anyone is contacted, and on a sale it writes that list for each transaction. spectup checks it against data from its own closed transactions, what each acquirer has bought and at what size, and its in-house signal engine watches for the week an acquirer becomes a buyer.

On a purchase it researches each owner and calls when something opens the door to a sale, such as succession, a funding gap or a competitor selling.

Sales and purchases run on the same reach: a newsletter to 2,000 B2B financial decision makers, a podcast with 8,000 listeners and a million impressions a year in front of this market, so many owners already know spectup when it calls.

How spectup runs a sale or a purchase

spectup acts on one side of the transaction. On a sale it releases the company to buyers in three steps: nothing signed, after the NDA, and after an offer. It names the owner to an acquirer only against a signed and dated agreement, and it records, for every party, what it received and on what day.

On a purchase the owner states the acquisition criteria in writing and spectup builds the longlist against them, with a rationale for each company. It screens, ranks and agrees the shortlist with the owner, approaches the owners directly, in the buyer's name or on a no-names basis, and manages the process through diligence to signing.

The fee has two parts: a retainer paid each month the work runs, and one transaction fee, capped, when the deal closes, and the first call ends with both figures in writing.

What should you ask an M&A advisory firm before you sign?

Before you sign with any firm above, ask it:

• Which sales or purchases of our size and sector have you closed in the last two years, and are they named on your site, with amounts?
• How do you find the buyers: a list built for our transaction that we approve, or a standing roster of relationships?
• What do you know about each buyer: what it has bought, at what size, and from which of your own transactions?
• When do you call a buyer: on a schedule, on its stated criteria, or in the week it shows it is acquiring?
• What do you publish under your own name, and how many financial decision makers does it reach?
• Do you act for the seller, for the buyer, or for both sides of any transaction?
• How are you paid: retainer, success fee, incentive fee, and is the transaction fee capped?
• Are you a FINRA-registered broker-dealer, which BrokerCheck shows?
• If not, do you rely on the federal exemption for M&A brokers?

For how a firm registers, the SEC publishes a guide to broker-dealer registration.

The right fit is the firm that answers these in writing. For how a sale is staged from preparation to closing, read how a sell-side process runs.

Three further guides, by what you are doing next:

• For a buyer putting several acquisitions together: buy-and-build strategy.
• For an investor looking for companies to approach: the guide to deal sourcing.
• For an owner raising growth capital: the best capital raising services.

Which of the thirteen M&A advisory firms fits your company?

2 columns. Drag the table sideways; the first column stays put.

Mergers and acquisitions advisory firms split on two questions: who finds the buyers, and when they are called.

Houlihan Lokey and Lincoln International are the two listed banks here, and both place themselves in the mid-market: Houlihan Lokey says a majority of its engagements are mid-cap, and Lincoln calls itself a top global M&A advisor to the mid-market.

If you want the list built for your transaction, every name approved by you and the call timed to the week a buyer is acting, put the questions above to spectup.