Kozusko Harris Duncan
Kozusko Harris Duncan is a U.S. law firm focused on private clients, families, family offices, trustees, and closely held businesses. Its work encompasses tax, trusts and estates, cross-border planning, philanthropy, business ownership, governance, and private-client disputes.
- Highest 2026 tier: Tier II
- Private Client Tax Advisory Boutiques
- 1 ranking category
Overview
Kozusko Harris Duncan is a U.S. law firm focused on private clients, families, family offices, trustees, and closely held businesses. Its work encompasses tax, trusts and estates, cross-border planning, philanthropy, business ownership, governance, and private-client disputes.
The firm is particularly well aligned with families whose wealth remains active through enterprises, investment entities, foundations, and multigenerational structures. Its boutique model allows private-client concerns to remain central rather than subordinate to a large corporate practice.
Kozusko Harris Duncan is included in 1 2026 ranking category. The highest recorded classification is Tier II. Ranking status is editorial evidence rather than a substitute for client diligence.
Firm facts
| Public identity | Kozusko Harris Duncan |
| Institution type | Private Client Tax Advisory Boutiques institution |
| Primary focus | Private Client Tax Advisory Boutiques |
| Official website | kozlaw.com |
| Highest 2026 ranking tier | Tier II |
Principal activities
Kozusko Harris Duncan occupies Tier II because its specialist identity and category alignment are exceptional. Its scale and geographic footprint are smaller than the global Tier I firms, but its focused U.S. private-client expertise is highly credible.
Core capability
Private Client Tax Advisory Boutiques
Client relevance
Category-specific expertise, institutional credibility and the ability to serve demanding private or professional clients.
Execution and verification
Current mandate fit, leadership, geographic coverage, legal entities and regulated activities should be confirmed directly.
Sector and mandate coverage
Primary category
Private Client Tax Advisory Boutiques
Institutional context
Coverage reflects the organization’s role in the ranking categories listed below. The precise service, product, investment, jurisdictional and client scope should be verified for each engagement.
Market position
Kozusko Harris Duncan occupies Tier II because its specialist identity and category alignment are exceptional. Its scale and geographic footprint are smaller than the global Tier I firms, but its focused U.S. private-client expertise is highly credible.
Kozusko Harris Duncan is assessed through public institutional information and Ranking News editorial research. Its strongest 2026 result is Tier II.
Competitive context
The relevant peer set varies by category, geography, client segment and mandate. Kozusko Harris Duncan should be compared on current category-specific capability, senior involvement, evidence of comparable work, operating resilience and any applicable regulatory permissions.
Comparable firms are shown for navigation and market context. Inclusion does not imply identical scale, ownership, geographic coverage, service model or regulatory status.
Leadership and governance
Leadership, ownership, governance and senior-team responsibilities may change. Current information should be verified through the official institutional source.
| Area | Current source |
|---|---|
| Leadership and governance | Current official information |
Corporate and public information
The public-facing organization is identified here as Kozusko Harris Duncan. Contracting entities, regulated affiliates, offices and legal permissions may differ by service and jurisdiction.
Corporate and disclosure information
| Organization | Kozusko Harris Duncan |
| Public source | https://kozlaw.com/ |
| Verification note | Confirm legal entity, licenses, offices and engagement terms directly before appointment. |
Rankings and recognition
Ranking inclusion and tier classification are editorial determinations. They should be read as category-specific assessments rather than universal league-table positions. The existence or maintenance of this Wiki profile does not influence ranking eligibility, tier or position.
Related Economy analysis
Selected reporting and market analysis from The Economy provides context for the institution’s operating environment:
- How Competition and Global Expansion Are Reshaping Private Wealth
- Private Banking vs Wealth Management: What the 2026 Rankings Show
- How Technology Becomes a Prerequisite for Survival, Not a Luxury
- Family Office Segmentation Is Rewriting the Wealth Industry’s Power Map
- Family Office Private Markets Are Becoming an Access Business
Related institutions and subjects
Sources and data transparency
The official website is the primary source for public identity and current capabilities. Ranking pages document 2026 category and tier status. Economy articles provide market context rather than firm-specific endorsement.
- Kozusko Harris Duncan — official website — current public description, services and institutional information.
- Wealth Ranking — Top 30 Private Client Tax Advisory Boutiques 2026 — 2026 inclusion and tier classification.
- The Economy — How Competition and Global Expansion Are Reshaping Private Wealth — market and sector context.
- The Economy — Private Banking vs Wealth Management: What the 2026 Rankings Show — market and sector context.
- The Economy — How Technology Becomes a Prerequisite for Survival, Not a Luxury — market and sector context.
