Bank M&A Counsel in 2026: Bank Deals Carry 2.1 Times the M&A Median

A general counsel at a bank or financial institution who is comparing bank M&A law firms will hear about deal size early in every pitch. Sartori & Partners data show that bank deals with a disclosed value carried a median of $660 million in the 12 months to October 2026, against $315 million for deals worked by corporate and M&A lawyers across every sector: 2.1 times as large. The bank figure covers every bank deal with a published value, not M&A alone. Capital markets lawyers worked on 51.0% of the sector's deals, about half of them, and corporate and M&A lawyers on 13.1%. The size gap therefore describes the sector's whole deal book, and it says less than it seems about the M&A team a bank will need.

The two medians rest on different slices of the record. 24.1% of bank deals carried a disclosed value, against 17.7% of corporate and M&A deals, so the bank figure draws on a wider part of its sector. The corporate median also spans small transactions: venture and growth deals were 10.2% of the practice's work. Industrial manufacturing offers a check on how much the practice mix explains. Corporate lawyers worked on 45.3% of that sector's deals, yet its disclosed median was $750 million, 2.4 times the corporate figure. A sector median above the practice median is common, whether the sector is led by capital markets work or by M&A.

No median is published for bank M&A deals on their own, and the bank figure should not be read as one. For a bank buyer the gap is a reason to test claims of scale. When a firm cites the size of its bank deals, ask which of them were M&A deals and which were capital markets mandates, and ask for the disclosed M&A values its proposed partners worked on in the past 12 months.

Measured by who worked on them, bank deals are a capital markets business first. In the Sartori & Partners deal record, capital markets lawyers sat on 51.0% of the sector's 3,433 deals over 12 months, 3.9 times the corporate and M&A share. Banking and finance lawyers came second at 15.8%. Deal types point the same way: M&A was the type on 11.6% of bank deals, against 19.3% of all dated deals. Several practice groups can work on one deal and many deals carry no practice label, so these shares overlap and are no split of the sector.

Industrial manufacturing shows the reverse pattern. Corporate lawyers worked on 45.3% of its deals, a gap of 32.2 points with banks, and capital markets lawyers on 28.7%. For a bank's legal department, the outside firms with the deepest bank records built much of that record on capital markets work. Their M&A partners may meet bank clients less often than their capital markets colleagues do, so ask to meet the M&A partner, not only the relationship partner.

From the M&A bench's side, bank work is a modest client group. Banks and financial institutions were the client sector on 451 of the practice's 11,230 deals over 12 months, or 4.0%, while they were the client sector on 7.1% of all dated deals. Industrial manufacturing reached the same 4.0% of corporate deals from a much smaller base, 2.0% of all deals. Technology headed the practice's client sectors at 14.0%.

So a corporate partner's year is spread across many industries, and bank deals are a small part of it. Bank M&A also needs lawyers who know supervisory approvals, and financial services regulatory lawyers appeared on 3.6% of bank deals. When you brief a firm, ask how many bank deals its proposed M&A partners led in the past 12 months, and whether its bank regulatory lawyers will sit on the same team from the first call.

Both deal counts grew year on year, at different speeds. Bank deals rose 7.2%, from 3,224 in the 12 months to September 2025 to 3,457 in the 12 months to September 2026. Corporate and M&A deals across all sectors rose 9.5%, from 10,198 to 11,170, and the whole deal record rose 10.6%. Industrial manufacturing deals held flat (+3.2%), at 937 and then 967. The bank count includes capital markets and disputes matters, so it is not a trend for bank M&A, for which no separate series exists.

Lateral moves into corporate and M&A practices grew faster than corporate deal counts, so more corporate lawyers changed firms. Lateral moves into corporate and M&A practices rose 15.8%, from 2,532 to 2,933, and lateral partner moves rose 12.2%, from 778 to 873. Sartori & Partners tracks these moves from public law-firm announcements, firm websites and professional profiles, checked monthly. For a bank buyer, more corporate partners changing firms means teams can change between one mandate and the next: confirm by name who will staff the deal, and ask which of them joined the firm in the past year.

Neither list ranks advisers on bank M&A. The first covers every bank deal, capital markets, banking and lending, and disputes and investigations work included. Davis Polk & Wardwell and A&O Shearman head it, both in the 151-250 band of deals advised over 12 months.

The second list covers corporate and M&A deals for clients in every sector, where technology carries the largest weight. Latham & Watkins and Kirkland & Ellis head it in the 401-700 band.

Checked name by name, one firm appears on both top 10 lists: White & Case, 7th on bank deals and 9th on corporate deals. The same firm is 1st on the list of firms that hired the most lateral corporate and M&A partners. A firm's absence from the corporate list says nothing about its bank M&A work, since that list counts volume across all industries. A bank shortlist can pair the two views: take sector depth from the bank list, then test the M&A partners each firm would field against the corporate list's volume.

Bank deal work concentrates in two cities. 36.8% of the sector's deals were handled with lawyers in New York and 16.0% with lawyers in London, against 31.9% and 16.5% for industrial manufacturing. Washington, DC follows for banks at 13.7%, then Chicago at 5.6% and Frankfurt at 5.3%. A deal counts in each city whose lawyers worked on it, so the city shares are never added together.

The same two cities lead corporate hiring. New York took 17.3% of lateral moves into corporate and M&A practices and London 10.4%, both above their weight in the whole lateral market, with index readings of 117 and 113, each set against the whole market's share. For a bank with M&A in view, a New York or London deal partner is the expected choice, and the widest pool of corporate lawyers on the move sits in those two cities too.

Read the size gap for what it is. Bank deals carry a median of $660 million against $315 million for corporate work, but the bank figure spans capital markets mandates as well as M&A, so it does not price a bank M&A team. Ask for the M&A record, not the sector record: corporate and M&A lawyers sat on 13.1% of bank deals, and a firm's bank total leans on its capital markets bench. Expect a shared bench, since banks were the client sector on 4.0% of corporate deals. Book early and confirm names: bank deals rose 7.2% while corporate lawyers kept changing firms. Start the shortlist with the firm on both lists, add two from the bank list, and staff the deal from New York or London.