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Advertising and professional services · United States

Sidley Austin

sidley.com ↗

Chicago-based global law firm, #6 Am Law, elite regulated M&A and litigation practice.

Hard to displace
Assessed 23 July 2026 · Evidence as of 23 July 2026
Strong structural protection; the business model survives ai pressure.
On the recordSince 23 July 2026 · Checkable from April 2027 · Every call on the record Checkpoint: 2026 fiscal year Am Law 100 results, testing whether PEP growth holds above 16%
The call

Sidley keeps growing revenue and partner profits while a new nonequity tier and AI-native rivals test how the partnership ladder and associate model hold up.

Sidley Austin is one of the largest law firms in America, handling complex deals, court cases, and regulatory work for major corporations. It is hard to replace because clients trust it for decades-long relationships, and you need a law license to practice law, which keeps out quick competitors. The real test is whether new AI-powered law firms like Norm Law (backed by major investors and led by a former Sidley executive) can win real clients and cases in the next few years, which would signal that even top firms face genuine disruption.

Why
01
AI pressure: Norm Law LLP (AI-native firm backed by Blackstone, Coatue, Bain Capital). AI speeds document review and cuts associate hours, but Norm Law has recruited talent, not yet won a marquee Sidley client. Could AI do the core job? Unlikely.
02
Bigger players: Big Four legal arms (Deloitte Legal, PwC Legal) expanding into corporate legal services. They chase commodity compliance and contract work, not Sidley's Supreme Court and complex M&A practice. Could a giant copy it? No, they are blocked.
03
What protects it. Bar admission rules, decades of client relationships, and a Supreme Court advocacy practice that no AI or accounting firm can replicate.
What would change this call
Norm Law announces a marquee client mandate win in regulated M&A, capital markets, or complex litigation by 2027. Would show AI-native firms can take real client work, not just recruit talent, from Sidley.
Sidley's 2026 fiscal year PEP growth rate published in April 2027 Am Law 100 data. Stalling or reversing growth would signal associate-leverage economics under real strain.
Tracking whether Sidley's nonequity partners from the March 2026 tier convert to full equity partnership within a normal timeframe. A one-way holding pen would show the new tier weakens the partnership career path.
Key numbers
  • 2025 revenue $3.74B, up 9% year over year (2025)
  • Profits per equity partner $5.157M, up 16% (2025)
  • Ranked #6 on 2026 Am Law 100 list (2026)
Named risks
  • AI-native firms like Norm Law recruiting senior Sidley leadership and talent. Severity: medium
  • Nonequity income-partner tier could become a holding pen rather than a path to full equity. Severity: medium
  • AI compressing associate-leverage economics that underpin Big Law billing model. Severity: medium
  • Attorney headcount down 3.1% YoY and rank slipped from #10 to #11 in 2025. Severity: low
  • About a third of corporate legal departments reconsidering firms lacking AI value. Severity: medium
Rivals, as read in July 2026
RivalDirectionEvidence
Kirkland & Ellisgaining on$10.556B revenue vs Sidley's $3.74B, first firm to cross $10B, 2025
Latham & Watkinsgaining on$8.3B revenue ranked #2 on 2026 Am Law 100, well above Sidley's #6
DLA Pipergaining on$4.58B revenue, #3 on 2026 Am Law 100, outranks Sidley
Norm Lawlosing toRecruited Sidley's former ExCom chair Mike Schmidtberger in January 2026
Clifford ChancecontestingSidley poached 5 Clifford Chance partners for finance practice, July 2026
Skadden Arpsgaining on$4.07B revenue, #5 on 2026 Am Law 100, ahead of Sidley's #6
Questions people ask
Is Sidley Austin profitable in 2026?
Yes. Sidley Austin reported 2025 fiscal year gross revenue of about $3.74 billion, up roughly 9% year over year, with profits per equity partner rising about 16% to $5.157 million, per Law.com reporting published April 9, 2026.
Could AI replace lawyers at Sidley Austin?
Not the core advocacy work. AI is automating document review and drafting, tasks historically done by junior associates, but 96% of legal professionals in a 2026 Thomson Reuters survey say letting AI represent clients in court would be 'a step too far,' preserving Sidley's litigation and regulatory roles.
Who is Sidley Austin's biggest competitor?
By revenue, Kirkland & Ellis dwarfs Sidley, posting $10.556 billion in 2025 (the first firm to cross $10B) versus Sidley's $3.74 billion, per the 2026 Am Law 100 published April 15, 2026. Latham & Watkins ($8.3B) is also far ahead.
Who owns Sidley Austin?
Sidley Austin is a privately held limited liability partnership, not owned by shareholders or investors. It is governed by a Management Committee chaired by Yvette Ostolaza and an Executive Committee chaired by Brian J. Fahrney as of 2026, per Law.com reporting from April 9, 2026.
Did Sidley Austin lose talent to AI law firms?
Yes. Former Executive Committee chair Mike Schmidtberger left Sidley to join AI-native firm Norm Law LLP in January 2026, a firm backed by Blackstone's legal team and investors including Coatue and Bain Capital, per BGov reporting from January 22, 2026.
What rank is Sidley Austin on the Am Law 100?
Sidley Austin ranked #6 on the 2026 Am Law 100 with about $3.74 billion in 2025 revenue, behind Kirkland & Ellis, Latham & Watkins, DLA Piper ($4.58B), Gibson Dunn ($4.21B) and Skadden ($4.07B), per Above the Law's April 15, 2026 report.
Timeline
  • 2026-07-09Sidley raids Clifford Chance, hiring 5 partners for finance practice
  • 2026-07-02Sidley makes 29th London lateral hire in 3 years, from DLA Piper
  • 2026-06-02Sidley promotes record 52 partners under new nonequity tier
  • 2026-04-152026 Am Law 100 published; Sidley ranks #6 at $3.74B revenue
  • 2026-04-09Law.com reports Sidley 2025 revenue up 9%, PEP up 16%
  • 2026-03-12Sidley debuts first nonequity income-partner tier
  • 2026-01-22Former ExCom chair Mike Schmidtberger joins AI-native firm Norm Law
  • 2025-12-02Sidley matches Cravath-scale associate bonuses
  • 2025-12Sidley promotes 29 partners in year-end round
Revision history
23 July 2026
First assessed. Hard to displace. The text above is fixed as of this date and is not edited afterwards.
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