New York attorney record · Judicial Dept 1
Katherine Elizabeth Koster
Harvard Law School alumna, admitted to the New York bar in 1993, registered office in New York, NY. Decades of status, address, and registration history on this record come straight from the NY Office of Court Administration.
- 1993
- Admitted
- 33
- Years in bar
- 2553246
- NY reg #
The record in one line
With 33 years on the register since a 1993 admission, Katherine Elizabeth Koster ranks among the New York bar's most senior active practitioners, longer-tenured than 71% of the currently-active bar.
- 33 yrs
- in active practice since admission
- Active
- current bar status: "Currently registered"
- #17605 of 93,608
- by tenure in New York office peers
- Law school
- Harvard Law School
Data updated September 2026
What this profile tells you
Bar status & tenure
Registration 2553246 with the New York bar authority has long belonged to Katherine Elizabeth Koster, 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 Caa Sports LLC, located in New York, NY (New York County), ZIP 10174. 1 other attorney shares this firm affiliation in the registry. Educational background: HARVARD LAW SCHOOL (16,712 registered alumni).
State context & due diligence
After 33 years on the register, Katherine Elizabeth Koster 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 Katherine Elizabeth Koster's 33 years since admission in 1993.
33 years on the New York bar
Years since admission, all currently-active NY attorneys
33 Top 29% higher than 71% 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 · September 2026
Tenure among New York, NY office peers
Katherine Elizabeth Koster is earlier in the New York, NY office cohort than most peers: local tenure rank #17,605 of 93,608 (19th percentile). See the New York attorney directory .
- Local rank
- #17,605
- City cohort
- 93,608
- Local percentile
- 19th
- Admitted
- 1993
Nearest tenure peers in New York
- David Abramovitz admitted 1993 · 33 yr
- Daniel Abrams admitted 1993 · 33 yr
- Marc Edward Ackerman admitted 1993 · 33 yr
- Gaston Jose Acosta-Rua admitted 1993 · 33 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 September 2026. Derived local rank, not published upstream.
How Katherine compares to fellow Harvard Law School alumni
Among the 3,384 Harvard Law School graduates in the New York register, Katherine Elizabeth Koster is longer-tenured than 81%.
33 years vs. Harvard Law School alumni
Years since admission - 3,384 NY-registered alumni of this school
33 Top 19% higher than 81% of 3,384 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 · September 2026
Harvard Law School's active-bar rate
Of Harvard Law School's 16,712 alumni in the New York register, 63.6% currently hold "Currently registered" status, below the statewide average.
The 1993 admission class today
Of the 6,439 attorneys admitted to the New York bar in 1993, 77.6% are still "Currently registered" today, above the statewide average across all admission years.
Professional Details
- Status
- Currently registered
- Registration Number
- 2553246
- Year Admitted
- 1993 (33 yrs · veteran)
- Judicial Department
- 1
- Next Registration
- May 2027
Location & Contact
- Company
- Caa Sports LLC
- City
- New York, NY
- County
- New York
- ZIP Code
- 10174
- Phone
- (646) 373-8200
Education
Status Distribution Across the New York Bar
Katherine Elizabeth Koster'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: Caa Sports LLC
Other NY-registered attorneys who share this firm name on the OCA register (not a geographic peer set).
View all attorneys at this firm →Near-tenure Harvard Law School alumni
Fellow alumni on the NY register whose admission year is closest to 1993 (excluding same-firm colleagues above).
Same admission year (1993), other cities
NY-registered attorneys admitted in 1993 whose listed office city differs from New York, a vintage cohort, not a neighborhood list.
Nationwide attorneys with similar admission year or city registry density
Two non-geo peer axes for Katherine Elizabeth Koster: closest NY bar admission year outside NY, and closest out-of-state office cities by how many NY-registered attorneys they list (~93,609 here). Distinct from same-firm, fellow-alumni, and same-year other-city strips above.
Similar admission year (~1993)
Counts come from the NY State Office of Court Administration registration extract; peers are not a competence or practice-area ranking.
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Compare Katherine Elizabeth Koster with similar attorneys in New York.
Compare attorneys →Before you rely on this record
Katherine Elizabeth Koster'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 Katherine Koster licensed?
Katherine Koster is licensed to practice law in New York.
When was Katherine Elizabeth Koster admitted to the bar?
Katherine Elizabeth Koster's admission to the New York bar dates back to 1993.
Where did Katherine Elizabeth Koster go to law school?
Katherine Elizabeth Koster attended HARVARD LAW SCHOOL.
What company does Katherine Elizabeth Koster work for?
Katherine Elizabeth Koster is associated with Caa Sports LLC in New York, NY.
Is Katherine Elizabeth Koster in good standing?
Yes, Katherine Elizabeth Koster 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.