PlainAttorney Register file of Sep 29, 2026 · NY Office of Court Administration, via data.ny.gov

Simpson Thacher & Bartlett LLP

A law firm on the New York attorney register · most who list it give an office in New York

On the register
1,308
Registered, current or due
1,288
Admitted
1957 to 2026

1,308 attorneys on the New York register file of Sep 29, 2026 list Simpson Thacher & Bartlett LLP or one of its other names as their employer; 1,288 (98%) are registered (currently, or due to re‑register), against 87.1% of all living registrants. They were admitted between 1957 and 2026 (median 2019), and 1,049 give an office in New York.

When its attorneys were admitted

Simpson Thacher & Bartlett LLP: share by decade of admission, against every living registrant <1%1950s<1%1960s1%1970s2%1980s7%1990s15%2000s27%2010s47%2020s
Simpson Thacher & Bartlett LLP: share by decade of admission, against every living registrant <1%1950s<1%1960s1%1970s2%1980s7%1990s15%2000s27%2010s47%2020s
Simpson Thacher & Bartlett LLP: share by decade of admission, against every living registrant <1%1950s<1%1%1970s2%7%1990s15%27%47%2020s
Simpson Thacher & Bartlett LLP: share by decade of admission, against every living registrant <1%1950s<1%1960s1%1970s2%1980s7%1990s15%2000s27%2010s47%2020s
Share of attorneys who list Simpson Thacher & Bartlett LLP admitted in each decade (columns) against every living registrant (dashed); register file of Sep 29, 2026.
DecadeThis firmEvery living registrant
1950s<1%<1%
1960s<1%2%
1970s1%6%
1980s2%13%
1990s7%17%
2000s15%22%
2010s27%24%
2020s47%15%

Source: NY Office of Court Administration, attorney registration file (data.ny.gov, dataset eqw2-r5nb), downloaded Sep 29, 2026; employer spellings merged (methodology).

Where they studied

Law schoolAttorneys
Columbia Law School157
New York University School of Law114
Harvard Law School104
Fordham University School of Law83
Georgetown University Law Center76
University of Pennsylvania Carey Law School66

Source: NY Office of Court Administration, attorney registration file (data.ny.gov, dataset eqw2-r5nb), downloaded Sep 29, 2026; school spellings matched.

Where its attorneys have their office

OfficeAttorneys
New York, NY1,049
Washington, DC65
London48
Hong Kong23
Houston, TX21
Palo Alto, CA19

Other names counted with this firm

The register gives each employer as the attorney typed it. These spellings, former names and merged firms are counted with Simpson Thacher & Bartlett LLP; a registrant who lists one of them may have registered before the firm took its current name, and the register does not say where anyone works today.

  • “Simpson Thacher”: 20
  • “Simpson Thacher & Barlett LLP”: 15

Attorneys who list Simpson Thacher & Bartlett LLP or one of its other names on the register, page 37 of 66

Currently registered attorneys first, most recently admitted first.

AttorneyAdmittedStatus
Meredith Dawn Karp2015Currently registered
Curran Shamus Lee2015Currently registered
Matthew Leighton2015Currently registered
Daniel Simon Levien2015Currently registered
May M. Mansour2015Currently registered
Johanna K Mayer2015Currently registered
Jessica Anne O’Connell2015Currently registered
Joongwon Park2015Currently registered
Spencer Patrick Patton2015Currently registered
Mojdeh Pourmahram2015Currently registered
Samuel Edmund Saunders IV2015Currently registered
Andrea Bidegaray Stephen2015Currently registered
Leah Nudelman Tendler2015Currently registered
Peter Albert Thomas2015Currently registered
Jomar Alejandro Vargas2015Currently registered
Mark Charles Viera2015Currently registered
Leanne Monique Welds2015Currently registered
Mary Quirk Wolfe2015Currently registered
Yizhou Xu2015Currently registered
Chi Zhang2015Currently registered

Source: NY Office of Court Administration, attorney registration file (data.ny.gov, dataset eqw2-r5nb), downloaded Sep 29, 2026.

Looking for a lawyer for a matter?

The register lists who is admitted and where their office is, not what kind of law anyone practises, so this page cannot suggest a lawyer for a problem. The New York State Bar Association’s Lawyer Referral Service matches people with lawyers by area of law; once you have a name, its record here shows whether the lawyer is registered.