Latham & Watkins was the firm or lawyer that ChatGPT, Claude, Gemini and Perplexity named most often. Latham & Watkins appeared in 241 of 288 answers (83.7%) measured on October 28, 2026. Skadden came next at 218 of 288 (75.7%). The two confidence intervals overlap, so the data cannot confirm that Latham & Watkins is ahead. Latham & Watkins was named first more often than any other firm or lawyer, in 92 of 288 answers. Google AI Overviews appeared on 65 of 65 searches (100%).
RESEARCH · Published May 27, 2026 · Updated October 31, 2026
M&A Lawyers Index 2.0: Latham and Skadden Lead AI Answers
Published May 27, 2026 · Updated October 31, 2026
AI answers analyzed across ChatGPT, Claude, Gemini and Perplexity
of answers named Latham & Watkins, the most-named (241 of 288)
tracked firms and lawyers named at least once (of 13)
of Google searches showed an AI Overview (65 of 65)
Version 2. This version replaces the first version of this study, first published May 27, 2026. It uses measured counts, so the two versions are not comparable. Version 2 asks 24 questions three times each on ChatGPT, Claude, Gemini and Perplexity (288 answers) and adds Google AI Overviews. Every rate comes with its count and a 95% interval.
What the data shows
241/288 (83.7%)
92/288 (31.9%)
65/72 (90.3%)
36/72 (50%)
120/288 (41.7%)
65/65 (100%)
41/65 (63.1%)
104/288 (36.1%)
Appearance rate across 288 four-engine answers. The bar is the 95% confidence interval; overlapping bars cannot be told apart at this sample size.
Which firms and lawyers AI engines name
| # | Name | Named in | Appearance rate | 95% interval |
|---|---|---|---|---|
| 1 | Latham & Watkins | 241/288 | 83.7% | 79.0–87.5% |
| 2 | Skadden | 218/288 | 75.7% | 70.4–80.3% |
| 3 | Kirkland & Ellis | 175/288 | 60.8% | 55.0–66.2% |
| 4 | Wachtell Lipton Rosen & Katz | 148/288 | 51.4% | 45.6–57.1% |
| 5 | Sullivan & Cromwell | 136/288 | 47.2% | 41.5–53.0% |
| 6 | Paul Weiss | 129/288 | 44.8% | 39.2–50.6% |
| 7 | Simpson Thacher | 120/288 | 41.7% | 36.1–47.4% |
| 8 | Davis Polk | 96/288 | 33.3% | 28.1–39.0% |
| 9 | Cravath Swaine & Moore | 87/288 | 30.2% | 25.2–35.7% |
| 10 | Sidley Austin | 76/288 | 26.4% | 21.6–31.8% |
| 11 | Faiza Saeed | 7/288 | 2.4% | 1.2–4.9% |
| 12 | Martin Lipton | 7/288 | 2.4% | 1.2–4.9% |
| 13 | H. Rodgin Cohen | 1/288 | 0.3% | 0.1–1.9% |
The full list
Own-domain citation is the share of 288 grounded answers that cited the entity's own domains (subdomains included). Citation share is of all 2,564 citations.
| # | Firm or lawyer | Named in | Appearance rate | 95% interval | First mention | Own-domain citation | Citation share |
|---|---|---|---|---|---|---|---|
| 1 | Latham & Watkins | 241/288 | 83.7% | 79–87.5% | 2.6 | 41.7% (120/288) | 6% |
| 2 | Skadden | 218/288 | 75.7% | 70.4–80.3% | 3.4 | 29.2% (84/288) | 4.7% |
| 3 | Kirkland & Ellis | 175/288 | 60.8% | 55–66.2% | 2.9 | 12.5% (36/288) | 1.4% |
| 4 | Wachtell Lipton Rosen & Katz | 148/288 | 51.4% | 45.6–57.1% | 3.6 | 8.3% (24/288) | 1% |
| 5 | Sullivan & Cromwell | 136/288 | 47.2% | 41.5–53% | 4.4 | 10.1% (29/288) | 1.2% |
| 6 | Paul Weiss | 129/288 | 44.8% | 39.2–50.6% | 4.9 | 14.2% (41/288) | 1.6% |
| 7 | Simpson Thacher | 120/288 | 41.7% | 36.1–47.4% | 5.2 | 8% (23/288) | 0.9% |
| 8 | Davis Polk | 96/288 | 33.3% | 28.1–39% | 5.1 | 5.2% (15/288) | 0.6% |
| 9 | Cravath Swaine & Moore | 87/288 | 30.2% | 25.2–35.7% | 4.5 | 5.6% (16/288) | 0.7% |
| 10 | Sidley Austin | 76/288 | 26.4% | 21.6–31.8% | 3.6 | 16.3% (47/288) | 2.1% |
| 11 | Faiza Saeed | 7/288 | 2.4% | 1.2–4.9% | 2.6 | 5.6% (16/288) | 0.7% |
| 12 | Martin Lipton | 7/288 | 2.4% | 1.2–4.9% | 2 | 8.3% (24/288) | 1% |
| 13 | H. Rodgin Cohen | 1/288 | 0.3% | 0.1–1.9% | 3 | 10.1% (29/288) | 1.2% |
The top eight, side by side
| # | Name | Appearance rate | Answers and interval | Other measures |
|---|---|---|---|---|
| 1 | Latham & Watkins | 83.7% | 241/288 answers · 95% CI 79–87.5% | first-mention position: 2.6; owned-domain citation (120/288): 41.7%; citation share: 6% |
| 2 | Skadden | 75.7% | 218/288 answers · 95% CI 70.4–80.3% | first-mention position: 3.4; owned-domain citation (84/288): 29.2%; citation share: 4.7% |
| 3 | Kirkland & Ellis | 60.8% | 175/288 answers · 95% CI 55–66.2% | first-mention position: 2.9; owned-domain citation (36/288): 12.5%; citation share: 1.4% |
| 4 | Wachtell Lipton Rosen & Katz | 51.4% | 148/288 answers · 95% CI 45.6–57.1% | first-mention position: 3.6; owned-domain citation (24/288): 8.3%; citation share: 1% |
| 5 | Sullivan & Cromwell | 47.2% | 136/288 answers · 95% CI 41.5–53% | first-mention position: 4.4; owned-domain citation (29/288): 10.1%; citation share: 1.2% |
| 6 | Paul Weiss | 44.8% | 129/288 answers · 95% CI 39.2–50.6% | first-mention position: 4.9; owned-domain citation (41/288): 14.2%; citation share: 1.6% |
| 7 | Simpson Thacher | 41.7% | 120/288 answers · 95% CI 36.1–47.4% | first-mention position: 5.2; owned-domain citation (23/288): 8%; citation share: 0.9% |
| 8 | Davis Polk | 33.3% | 96/288 answers · 95% CI 28.1–39% | first-mention position: 5.1; owned-domain citation (15/288): 5.2%; citation share: 0.6% |
Claude named Kirkland & Ellis in 65 of 72 answers. The other engines did so in 24 to 51 of 72. Claude named Davis Polk in 36 of 72 answers. The other engines did so in 15 to 24 of 72.
ChatGPT
72 asked · 72 returned · 72 grounded
Same questions, different answers
Claude
72 asked · 72 returned · 72 grounded
Gemini
72 asked · 72 returned · 72 grounded
Perplexity
72 asked · 72 returned · 72 grounded
Google AI Overviews were captured through 65 U.S. desktop searches and scored only where an overview appeared, so five-engine figures use 288 + 65 = 353 answers.
The fifth engine
Trigger rate: 65 of 65 searches
Google AI Overviews appeared on 65 of 65 searches (100%, CI 94.4–100%). The other 0 searches showed no overview. Within the 65 overviews, Latham & Watkins was named in 41 (63.1%), Kirkland & Ellis was named in 34 (52.3%), Skadden was named in 31 (47.7%), Paul Weiss was named in 23 (35.4%). legal500.com was the most-cited source, with 18 citations and an appearance in 15 of 65 overviews.
| Five-engine rank | Name | Five-engine rate | Four-engine rank |
|---|---|---|---|
| 1 | Latham & Watkins | 79.9% | 1 |
| 2 | Skadden | 70.5% | 2 |
| 3 | Kirkland & Ellis | 59.2% | 3 |
| 4 | Wachtell Lipton Rosen & Katz | 48.2% | 4 |
| 5 | Sullivan & Cromwell | 43.1% | 5 |
| 6 | Paul Weiss | 43.1% | 6 |
| 7 | Simpson Thacher | 38.2% | 7 |
| 8 | Davis Polk | 32.9% | 8 |
| 9 | Cravath Swaine & Moore | 30.3% | 9 |
| 10 | Sidley Austin | 24.9% | 10 |
Who each question surfaces first
Six questions from the set. Each tile uses that question's own four-engine answers as the denominator.
| Question | Leader | Next | AI Overview |
|---|---|---|---|
| Q01 · 12 answers | Wachtell Lipton Rosen & Katz 100.0% | Skadden 100.0%; Latham & Watkins 100.0% | AI Overview shown on 3 of 3 searches |
| Q02 · 12 answers | Wachtell Lipton Rosen & Katz 100.0% | Sullivan & Cromwell 100.0%; Latham & Watkins 91.7% | AI Overview shown on 3 of 3 searches |
| Q03 · 12 answers | Sullivan & Cromwell 100.0% | Skadden 75.0%; Simpson Thacher 75.0% | AI Overview shown on 3 of 3 searches |
| Q04 · 12 answers | Simpson Thacher 100.0% | Kirkland & Ellis 100.0%; Paul Weiss 91.7% | AI Overview shown on 3 of 3 searches |
| Q05 · 12 answers | Latham & Watkins 66.7% | Skadden 41.7%; Sullivan & Cromwell 25.0% | AI Overview shown on 3 of 3 searches |
| Q06 · 12 answers | Wachtell Lipton Rosen & Katz 100.0% | Skadden 100.0%; Simpson Thacher 100.0% | AI Overview shown on 3 of 3 searches |
The four engines produced 2,564 citations in total. chambers.com was cited most often, with 156 citations (6.1%) across 104 answers. Next came lw.com (155), skadden.com (120), legal500.com (109), leadersleague.com (75), privatebankerinternational.com (60).
Four AI engines · share of 288 grounded answers
Most-cited domains
Google AI Overviews · share of 65 overviews
Citation share by source type
Share of all citations by the type of site cited. Source types were reclassified on October 29, 2026. 'Company / brand sites' now covers only the official sites of companies, brands and schools; publishers, directories, trade bodies and other sites have their own types, and sites that could not be placed are 'Other / unclassified'.
| Source type | Four AI engines (of 2,564 citations) | Google AI Overviews (of 183 citations) |
|---|---|---|
| Company / brand sites | 1,523 (59.4%) | 110 (60.1%) |
| Directories / rankings | 577 (22.5%) | 33 (18%) |
| Trade / specialist press | 209 (8.2%) | 18 (9.8%) |
| General news / business press | 63 (2.5%) | 5 (2.7%) |
| Review / comparison publishers | 52 (2%) | 2 (1.1%) |
| Research / data providers | 50 (2%) | 5 (2.7%) |
| Reference | 35 (1.4%) | 0 (0%) |
| Official / government | 32 (1.2%) | 0 (0%) |
| Community / social | 16 (0.6%) | 9 (4.9%) |
| Institutions / trade bodies | 5 (0.2%) | 1 (0.5%) |
| Other / unclassified | 2 (0.1%) | 0 (0%) |
How can firms and lawyers improve their AI visibility?
These steps follow from the measured results above. They describe what the engines cited in this study and are not a guarantee of results.
| Step | What this study measured |
|---|---|
| Put your facts on your own domain. | Latham & Watkins's own domains were cited in 41.7% of grounded answers, Skadden's in 29.2% and Sidley Austin's in 16.3%. H. Rodgin Cohen was named in only 0.3% of answers, yet its own domains were cited in 10.1%. |
| Keep your facts accurate on the sites engines cite. | The most-cited sites other than the tracked names' own were chambers.com (in 36.1% of grounded answers), legal500.com (27.4%), leadersleague.com (17.0%), goodwinlaw.com (14.9%) and coyotewealth.com (13.2%). Directories and rankings supplied 22.5% of citations and trade and specialist press 8.2%. |
| Check each engine separately. | Claude named Kirkland & Ellis in 90.3% of answers against 33.3% on Perplexity. ChatGPT named Sullivan & Cromwell in 61.1% of answers against 20.8% on Perplexity. |
| Do not ignore video and community sites. | Community and social sites supplied 4.9% of Google AI Overview citations against 0.6% in the four chat engines. reddit.com was cited in 4.6% of overviews. |
| Watch names outside the tracked list. | Goodwin Procter LLP (52), Gibson, Dunn & Crutcher LLP (48), Cooley LLP (31), Cleary Gottlieb Steen & Hamilton LLP (28), Debevoise & Plimpton LLP (26) were named often but were not tracked. |
| Re-run the same questions every month. | Compare counts and intervals, not ranks. The 24 questions are in the appendix. |
Frequently asked questions
Which firm or lawyer do AI engines name most often?
Latham & Watkins, named in 241 of 288 four-engine answers (83.7%, CI 79–87.5%). Skadden was second at 218 of 288 (75.7%). The intervals overlap, so the two cannot be separated statistically.
Which firm or lawyer is named first most often?
Latham & Watkins was the first firm or lawyer named in 92 of 288 answers, with an average first position of 2.6.
How often do Google AI Overviews appear for these questions?
An overview appeared on 65 of 65 searches (100%, CI 94.4–100%). Within those 65 overviews, Latham & Watkins was named most often, in 41 (63.1%).
Which sources do the engines cite?
Across 2,564 four-engine citations, chambers.com was cited most (156 citations, in 104 of 288 grounded answers), followed by lw.com (155 citations).
Do the four engines agree?
Only in part. Claude named Kirkland & Ellis in 65 of 72 answers, against 24 to 51 of 72 on the other engines. Claude named Davis Polk in 36 of 72 answers, against 15 to 24 of 72 on the other engines.
How this study was measured
24 questions × 3 runs each × 4 AI engines = 288 answers + 65 Google searches · 65 AI Overviews
24 questions, each asked 3 times on each engine, measured October 28, 2026. Market: United States, English. The destination site was not mentioned to any engine. Gemini answers were produced by gemini-3.6-flash; every Gemini answer in this report used that one model. All 72 Gemini answers had search sources. Entities count as named when they appear in the answer text; products and name variants roll up to the tracked name, and people are matched with middle names or initials, nicknames, possessives and suffixes. First-name variants (for example Jeffrey for Jeff, William for Bill) are matched, but only together with the tracked last name. Law firms are also counted by their common short name (for example Weil for Weil Gotshal, Akin for Akin Gump), matched case-sensitively as a whole word; short forms that could mean a tracked lawyer or a common name are not used.
| Engine | Model IDs called | Asked | Returned | Grounded |
|---|---|---|---|---|
| ChatGPT | gpt-5-mini | 72 | 72 | 72 |
| Claude | claude-sonnet-5-5 | 72 | 72 | 72 |
| Gemini | gemini-3.6-flash | 72 | 72 | 72 |
| Perplexity | sonar-pro | 72 | 72 | 72 |
| Google AI Overviews | DataForSEO Google SERP (live, advanced) | 65 | 65 shown | 65 |
Own-domain citations count a domain plus all its subdomains, with the same rule in every table.
Definitions
- Appearance rate: answers naming the entity ÷ answers returned, with Wilson 95% intervals.
- First mention: average order in which the entity first appears (1 = first).
- Own-domain citation: grounded answers citing the entity's domains ÷ grounded answers.
- Citation share: citations to the entity's domains ÷ all citations.
Limits
- Measured on one day, October 28, 2026. Each engine answered 24 questions 3 times. Answers came from each engine's API (model IDs above); the consumer apps can answer differently.
- Only 13 tracked firms and lawyers were scored. Untracked names that appeared often were not scored, including Goodwin Procter LLP (52), Gibson, Dunn & Crutcher LLP (48), Cooley LLP (31), Cleary Gottlieb Steen & Hamilton LLP (28), Debevoise & Plimpton LLP (26).
- AI Overview figures are based on only 65 overviews, so estimates for individual firms and lawyers are less precise than the four-engine figures.
- 7 Google searches could not be fetched by DataForSEO after three tries. They are excluded from the AI Overview figures, so the trigger rate uses 65 searches.
- Reports describe what the engines said, attributed to the engines. They make no judgement about the people or organizations named and are not legal or financial advice.
- Intervals treat each answer as independent, so they understate uncertainty for the 24 repeated questions.
Appendix: The 24 questions
Questions marked "Core question" are the original study questions, asked word for word. The others are added neutral questions.
| # | Question | Group | Source |
|---|---|---|---|
| 01 | Best M&A law firms for a $5 billion strategic acquisition. | M&A and Corporate Lawyers | Core question |
| 02 | Which law firms are best at defending against a hostile takeover? | M&A and Corporate Lawyers | Core question |
| 03 | Which law firms advise on bank mergers? | M&A and Corporate Lawyers | Core question |
| 04 | Which law firms are best for private equity acquisitions? | M&A and Corporate Lawyers | Core question |
| 05 | What law firm should a founder hire to sell a startup? | M&A and Corporate Lawyers | Core question |
| 06 | Which law firms lead in public company M&A? | M&A and Corporate Lawyers | Core question |
| 07 | Who are the most prominent M&A lawyers in the US? | M&A and Corporate Lawyers | Core question |
| 08 | Which law firms handle cross-border acquisitions? | M&A and Corporate Lawyers | Core question |
| 09 | Which law firms advise companies facing activist investors? | M&A and Corporate Lawyers | Added question |
| 10 | Which law firms advise on technology M&A? | M&A and Corporate Lawyers | Added question |
| 11 | Which law firms advise on healthcare and pharmaceutical M&A? | M&A and Corporate Lawyers | Added question |
| 12 | Which law firms advise board special committees? | M&A and Corporate Lawyers | Added question |
| 13 | Which law firms advise on energy M&A? | M&A and Corporate Lawyers | Added question |
| 14 | Which law firms handle SPAC transactions? | M&A and Corporate Lawyers | Added question |
| 15 | Which law firms handle antitrust review of mergers? | M&A and Corporate Lawyers | Added question |
| 16 | Which law firms advise on middle-market M&A? | M&A and Corporate Lawyers | Added question |
| 17 | Which law firms advise on corporate spin-offs? | M&A and Corporate Lawyers | Added question |
| 18 | Which law firms advise boards in proxy fights? | M&A and Corporate Lawyers | Added question |
| 19 | Which law firms rank highest in M&A league tables? | M&A and Corporate Lawyers | Added question |
| 20 | Which law firms advise on CFIUS reviews? | M&A and Corporate Lawyers | Added question |
| 21 | Which law firms advise on media company mergers? | M&A and Corporate Lawyers | Added question |
| 22 | Which law firms advise on take-private deals? | M&A and Corporate Lawyers | Added question |
| 23 | Which law firms advise on sales of venture-backed companies? | M&A and Corporate Lawyers | Added question |
| 24 | Which law firms advise on insurance M&A? | M&A and Corporate Lawyers | Added question |
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