New York attorney record · Judicial Dept 1
William B. Brentani
Boston University alumna, admitted to the New York bar in 1990, registered office in Palo Alto, CA. Decades of status, address, and registration history on this record come straight from the NY Office of Court Administration.
- 1990
- Admitted
- 36
- Years in bar
- 2328771
- NY reg #
The record in one line
With 36 years on the register since a 1990 admission, William B. Brentani ranks among the New York bar's most senior active practitioners, longer-tenured than 79% of the currently-active bar.
- 36 yrs
- in active practice since admission
- Active
- current bar status: "Currently registered"
- Top 21%
- by tenure among active NY attorneys
- Law school
- Boston University
Data updated May 2026
What this profile tells you
Bar status & tenure
Registration 2328771 with the New York bar authority has long belonged to William B. Brentani, a veteran practitioner still in active good standing. Registration is recorded within Judicial Department 1, the appellate division overseeing this attorney's home district.
Practice context & education
Practice address is listed under Simpson Thacher & Bartlett LLP, located in Palo Alto, CA, ZIP 94304. 5 other attorneys share this firm affiliation in the registry. Educational background: BOSTON UNIVERSITY.
State context & due diligence
After 36 years on the register, William B. Brentani still falls within the New York bar's active cohort, a share of the register detailed further below.
Experience vs. the active New York bar
Few active New York attorneys match William B. Brentani's 36 years since admission in 1990. The histogram plots that tenure against every currently-active attorney in the state.
36 years on the New York bar
Years since admission, all currently-active NY attorneys
36 Top 21% higher than 79% of 284,296 active NY attorneys
Each bar is a band; taller bars hold more active NY attorneys. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NY Office of Court Administration, Attorney Registration · May 2026
How William compares to fellow Boston University alumni
Among the 1,967 Boston University graduates in the New York register, William B. Brentani is longer-tenured than 83% - a school-cohort view of experience, alongside the statewide one above.
36 years vs. Boston University alumni
Years since admission - 1,967 NY-registered alumni of this school
36 Top 17% higher than 83% of 1,967 fellow alumni
Each bar is a band; taller bars hold more fellow alumni. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NY Office of Court Administration, Attorney Registration · May 2026
The 1990 admission class today
Of the 6,112 attorneys admitted to the New York bar in 1990, 56.7% are still "Currently registered" today, below the statewide average across all admission years.
Professional Details
- Status
- Currently registered
- Registration Number
- 2328771
- Year Admitted
- 1990 (36 yrs · veteran)
- Judicial Department
- 1
- Next Registration
- Aug 2026
Location & Contact
- Company
- Simpson Thacher & Bartlett LLP
- City
- Palo Alto, CA
- ZIP Code
- 94304
- Phone
- (650) 251-5110
Education
BOSTON UNIVERSITY
Status Distribution Across the New York Bar
William B. Brentani's current status, "Currently registered", places this attorney in the 66.2% of the 429,620-attorney New York register currently marked active.
Full statewide breakdown & source note
Source: NY Office of Court Administration, Attorney Registrations. Status counts reflect the latest reporting cycle. Bar status confirms registration only; it does not imply competence, specialty fit, or freedom from complaints.
Other Attorneys at Simpson Thacher & Bartlett LLP
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Compare attorneys →Before you rely on this record
William B. Brentani's "Currently registered" listing confirms bar standing only, it is a registration fact to verify, not a verdict on quality or competence.
Frequently Asked Questions
Where is William Brentani licensed?
William Brentani is licensed to practice law in New York.
When was William B. Brentani admitted to the bar?
William B. Brentani's admission to the New York bar dates back to 1990.
Where did William B. Brentani go to law school?
William B. Brentani attended BOSTON UNIVERSITY.
What company does William B. Brentani work for?
William B. Brentani is associated with Simpson Thacher & Bartlett LLP in Palo Alto, CA.
Is William B. Brentani in good standing?
Yes, William B. Brentani holds active bar status ("Currently registered").
Sourced from the NY Office of Court Administration, informational only, not legal advice. Full disclosure.
Read our methodology - how this data is sourced, computed, and verified.