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Nathaniel Sack, Business Attorney in Chicago, Illinois

Over 61 years of legal practice · focused on Business, Health Care, and M&A · 5.0/5 rating from 1 verified client review

Partner

Chicago, IL

Practicing business in Chicago since 1965.

61+
Years practicing
5.0 ★
1 client review
1
Bar admission

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Quick answer

Nathaniel Sack is a partner based in Chicago, IL. The practice focuses on Business, Health Care, and M&A. Nathaniel has over 61 years of legal experience. Rated 5.0 out of 5 from 1 client review.

Based in
Chicago, IL
Experience
over 61 years
Known for
Business · Health Care · M&A
  • Handles Business, Health Care, and M&A matters from Chicago, IL.
  • Over 61 years of practice as a licensed attorney.
  • Recognized with AV Preeminent.

About Nathaniel Sack: Nathaniel Sack is a partner based in Chicago, IL. The practice focuses on Business, Health Care, and M&A. Nathaniel has over 61 years of legal experience. Rated 5.0 out of 5 from 1 client review.

Areas of practice

Nathaniel's practice areas in Chicago

Nathaniel concentrates on business, health care, m&a, real estate, and securities. Each area below outlines the kind of case Nathaniel handles, typical outcomes to expect, and how the intake process starts.

Business cases in Chicago, Illinois

Nathaniel takes business matters in Chicago, Illinois. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Nathaniel agrees to represent you.

Health Care cases in Chicago, Illinois

Nathaniel takes health care matters in Chicago, Illinois. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Nathaniel agrees to represent you.

M&A cases in Chicago, Illinois

Nathaniel takes m&a matters in Chicago, Illinois. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Nathaniel agrees to represent you.

Real Estate cases in Chicago, Illinois

Nathaniel takes real estate matters in Chicago, Illinois. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Nathaniel agrees to represent you.

Securities cases in Chicago, Illinois

Nathaniel takes securities matters in Chicago, Illinois. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Nathaniel agrees to represent you.

Biography

Nathaniel Sack, business attorney serving Chicago

Nathaniel Sack is a partner based in Chicago, IL. The practice focuses on Business, Health Care, and M&A. Nathaniel has over 61 years of legal experience. Rated 5.0 out of 5 from 1 client review. Nathaniel works from Chicago, Illinois and takes on business matters across the region.

Nathaniel Sack is a lawyer practicing corporate, corporate governance & compliance, mergers & acquisitions and 8 other areas of law. Nathaniel received a B.A. degree from University of Michigan, and has been licensed for 61 years. Nathaniel practices in Chicago, IL.

Nathaniel's approach to business cases

Nathaniel Sack is a lawyer practicing corporate, corporate governance & compliance, mergers & acquisitions and 8 other areas of law. Nathaniel received a B.A. degree from University of Michigan, and has been licensed for 61 years. Nathaniel practices in Chicago, IL.

Clients Nathaniel works with

Nathaniel reviews new inquiries case-by-case for business, health care, and m&a matters in Chicago and the surrounding Illinois area.

Credentials

Credentials — where Nathaniel studied and practices

  • DePaul University LL.M. Taxation Harvard Law School

    J.D. · 1965

  • University of Michigan B.A. cum laude

Jurisdictions

Nathaniel's state bar admissions

  • Illinois

    1965 · ACTIVE

Nathaniel studied at J.D. in DePaul University LL.M. Taxation Harvard Law School and — in University of Michigan B.A. cum laude.

Law school and academic background

Nathaniel completed J.D. in DePaul University LL.M. Taxation Harvard Law School and — in University of Michigan B.A. cum laude. Formal legal training is one signal of substantive knowledge — the day-to-day practice Nathaniel runs in Illinois is where that training gets applied to real client questions.

Recognition

Nathaniel's legal honors and published work

Nathaniel has received 1 formal recognition from bar associations, industry bodies, and peer-review services.

  • AV Preeminent

Legal awards and honors

AV Preeminent.

Affiliations

Nathaniel's professional memberships and bar associations

  • Chicago (Member, Corporation Law, Federal Tax Law Committees) and American (Member, Federal and Tax Law and Exempt Organization Committees) Bar Associations

    membership

Locations

Nathaniel Sack's office in Chicago

Nathaniel's primary office is at 131 South Dearborn Street Suite 2400, Chicago, IL, 60603-5577. In-person meetings are by appointment; a phone intake usually comes first.

Main office

131 South Dearborn Street Suite 2400

Chicago, IL 60603-5577

Open in Google Maps

Client feedback

Client reviews of Nathaniel Sack — 5.0/5 rating from 1 verified client review

Every review below is from a verified client of Nathaniel. Reviews cover communication, case outcome, and value — the three signals that matter most when comparing business attorneys in Chicago.

5.0

1 client review

Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once Nathaniel Sack claims this profile.

Read all reviews

Hiring guide

How to hire Nathaniel Sack — what to expect in your first consultation

Working with a new business attorney should feel structured. Here's how the first two conversations with Nathaniel usually go, from the moment you request a consult to the day representation begins.

Consultation formats and pricing

Nathaniel charges for the initial consult. That fee is credited toward representation if you retain Nathaniel's office.

What to bring to your first meeting

Bring any documents you already have — police reports, medical records, filed pleadings, correspondence from an insurer, a copy of the contract at issue. If you're not sure, err on the side of bringing everything; Nathaniel will tell you what matters and what doesn't.

Questions to ask a business attorney in Chicago, Illinois

A short list to run through before you commit: How many business matters have you handled in the last year? What's your fee structure? Who else in the office will work on this? What's your realistic estimate of timeline and range of outcomes? How do I reach you between meetings?

Fees & payment

Fees, payment methods, and consultation options for Nathaniel

Nathaniel discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in business practice — ask which fits.

Hourly rates, contingency fees, and flat-fee options

Every business matter is priced differently. Simple document review might be a flat fee. Injury litigation is often contingency. Complex commercial disputes usually run hourly with a retainer. Nathaniel confirms the model in the engagement letter before any work starts.

Payment methods and payment plans

Nathaniel's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many business practices work with clients on structured schedules.

Frequently asked

Frequently asked questions about Nathaniel Sack

  • How much does it cost to hire Nathaniel for a business case?

    Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Nathaniel walks through the likely range during the consult so there are no surprises.

  • Does Nathaniel offer a free consultation?

    Nathaniel charges for the initial consult; that fee is credited toward representation if you retain Nathaniel's office. Some business attorneys offer free consults — check Nathaniel's current terms during booking.

  • How long do business cases in Illinois typically take?

    Simple business matters can wrap in a few weeks; disputed cases can run 6–18 months from intake to resolution, longer if the matter goes to trial. Nathaniel gives a realistic estimate for your facts at the consult — vague answers here are a red flag.

  • Can Nathaniel take my case if I'm outside Chicago?

    Nathaniel is licensed in Illinois. Matters governed by Illinois law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — Nathaniel will tell you if the case is a fit or refer you to someone closer to your court.

  • What should I bring to my first meeting with Nathaniel?

    Bring every document that touches the dispute: contracts, correspondence, police or medical reports, filed pleadings, invoices, photographs, insurance letters. Also bring a written timeline of what happened, in your own words. Nathaniel will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.

  • Is Nathaniel accepting new business clients right now?

    Nathaniel's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.

Areas served

Business attorneys serving Chicago, Springfield and Northbrook in Illinois

Nathaniel handles business matters throughout Illinois. Each city below is a direct link into the search page for verified business attorneys in that community.

More counsel

If Nathaniel's intake is full or the fit isn't right, these business attorneys in Chicago handle similar matters. Every profile below is verified and open to consultations.