New York attorney record · Judicial Dept 2
William Haselden Ellerbe
University Of Michigan alumna, admitted to the New York bar in 2012, registered office in Philadelphia, PA. This record's status, address, and registration history come straight from the NY Office of Court Administration.
- 2012
- Admitted
- 14
- Years in bar
- 5051032
- NY reg #
The record in one line
Admitted in 2012, William Haselden Ellerbe has built 14 years of active New York practice - more tenure than 25% of the state's currently-active attorneys.
- 14 yrs
- in active practice since admission
- Active
- current bar status: "Currently registered"
- #1036 of 1,853
- by tenure in Philadelphia office peers
- Law school
- University Of Michigan
Data updated August 2026
What this profile tells you
Bar status & tenure
Bar number 5051032 on the New York register belongs to William Haselden Ellerbe, currently in active standing. Registration is recorded within Judicial Department 2, the appellate division overseeing this attorney's home district.
Practice context & education
Practice address is listed under Berger Montague PC, located in Philadelphia, PA, ZIP 19103. 5 other attorneys share this firm affiliation in the registry. Educational background: UNIVERSITY OF MICHIGAN (2,044 registered alumni).
State context & due diligence
William Haselden Ellerbe is currently part of the New York bar's active cohort, a group the breakdown below sizes against the full register.
Experience vs. the active New York bar
14 years into an active New York practice since a 2012 admission, William Haselden Ellerbe sits here on the statewide experience curve - taller bars hold more attorneys at that experience level.
14 years on the New York bar
Years since admission, all currently-active NY attorneys
14 Top 75% higher than 25% of 290,787 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 · August 2026
Tenure among Philadelphia, PA office peers
William Haselden Ellerbe's 14-year NY register tenure places mid-pack in Philadelphia, PA: rank #1,036 of 1,853 office peers (56th percentile). See the Philadelphia attorney directory .
- Local rank
- #1,036
- City cohort
- 1,853
- Local percentile
- 56th
- Admitted
- 2012
Nearest tenure peers in Philadelphia
- Bryan Arner admitted 2012 · 14 yr
- Justin Thomas Ashenfelter admitted 2012 · 14 yr
- Juan M. Baez admitted 2012 · 14 yr
- Adam Herschel Balin admitted 2012 · 14 yr
How local rank is computed
Rank uses years since NY-bar admission among non-deceased registry rows that list the same office city and state, a local placement, not a statewide claim. Source: NY Office of Court Administration Attorney Registration · as of August 2026. Derived local rank, not published upstream.
How William compares to fellow University Of Michigan alumni
Among the 1,196 University Of Michigan graduates in the New York register, William Haselden Ellerbe is longer-tenured than 3%.
14 years vs. University Of Michigan alumni
Years since admission - 1,196 NY-registered alumni of this school
14 Top 97% higher than 3% of 1,196 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 · August 2026
University Of Michigan's active-bar rate
Of University Of Michigan's 2,044 alumni in the New York register, 62.6% currently hold "Currently registered" status, below the statewide average.
The 2012 admission class today
Of the 9,632 attorneys admitted to the New York bar in 2012, 69.6% are still "Currently registered" today, above the statewide average across all admission years.
Professional Details
- Status
- Currently registered
- Registration Number
- 5051032
- Year Admitted
- 2012 (14 yrs · mid-career)
- Judicial Department
- 2
- Next Registration
- Jul 2028
Location & Contact
- Company
- Berger Montague PC
- City
- Philadelphia, PA
- ZIP Code
- 19103
- Phone
- (215) 989-4844
Education
Status Distribution Across the New York Bar
William Haselden Ellerbe's current status, "Currently registered", places this attorney in the 67.2% of the 432,625-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.
Same firm affiliation: Berger Montague PC
Other NY-registered attorneys who share this firm name on the OCA register (not a geographic peer set).
Near-tenure University Of Michigan alumni
Fellow alumni on the NY register whose admission year is closest to 2012 (excluding same-firm colleagues above).
Same admission year (2012), other cities
NY-registered attorneys admitted in 2012 whose listed office city differs from Philadelphia, a vintage cohort, not a neighborhood list.
Nationwide attorneys with similar admission year or city registry density
Two non-geo peer axes for William Haselden Ellerbe: closest NY bar admission year outside PA, and closest out-of-state office cities by how many NY-registered attorneys they list (~1,854 here). Distinct from same-firm, fellow-alumni, and same-year other-city strips above.
Similar admission year (~2012)
Counts come from the NY State Office of Court Administration registration extract; peers are not a competence or practice-area ranking.
Verify This Attorney
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Compare attorneys →Before you rely on this record
William Haselden Ellerbe'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 Ellerbe licensed?
William Ellerbe is licensed to practice law in New York.
When was William Haselden Ellerbe admitted to the bar?
William Haselden Ellerbe has been on the New York bar register since 2012.
Where did William Haselden Ellerbe go to law school?
William Haselden Ellerbe attended UNIVERSITY OF MICHIGAN.
What company does William Haselden Ellerbe work for?
William Haselden Ellerbe is associated with Berger Montague PC in Philadelphia, PA.
Is William Haselden Ellerbe in good standing?
Yes, William Haselden Ellerbe holds active bar status ("Currently registered").
Cite this page & disclosure
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.