New York attorney record · Judicial Dept 4
Holly Danielle Mergenhagen
Case Western Reserve University alumna, admitted to the New York bar in 2012, registered office in Williamsville, NY. This record's status, address, and registration history come straight from the NY Office of Court Administration.
- 2012
- Admitted
- 14
- Years in bar
- 5049234
- NY reg #
The record in one line
Holly Danielle Mergenhagen appears in the New York attorney register with a current status of "Due to reregister within 30 days of birthday", on record since 2012 - an administrative designation rather than discipline, but confirm current standing with the state bar.
- 14 yrs
- since first admission to the bar
- Pending-renewal
- current bar status: "Due to reregister within 30 days of birthday"
- #336 of 456
- by tenure in Williamsville office peers
- Law school
- Case Western Reserve University
Data updated September 2026
What this profile tells you
Bar status & tenure
Holly Danielle Mergenhagen is registered as bar number 5049234 with the New York bar authority, carrying a current status of "Due to reregister within 30 days of birthday", a routine periodic-renewal reminder, not discipline. Registration is recorded within Judicial Department 4, the appellate division overseeing this attorney's home district.
Practice context & education
Practice address is listed under Seneca Holdings LLC, located in Williamsville, NY (Erie County), ZIP 14221. Educational background: CASE WESTERN RESERVE UNIVERSITY (326 registered alumni).
State context & due diligence
A "Due to reregister within 30 days of birthday" status falls outside the New York bar's active cohort for now. The breakdown below shows what share of the register that represents.
Tenure among Williamsville, NY office peers
Relative to the 456 NY-registered attorneys listing Williamsville, NY, Holly Danielle Mergenhagen is longer-tenured than 73% (local rank #336). See the Williamsville attorney directory .
- Local rank
- #336
- City cohort
- 456
- Local percentile
- 73rd
- Admitted
- 2012
Nearest tenure peers in Williamsville
- Richard Patrick Fay admitted 2012 · 14 yr
- Malou Perez Mararang admitted 2012 · 14 yr
- Kimberly Genieve Mccoy admitted 2012 · 14 yr
- Nevin Frederic Murchie 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 September 2026. Derived local rank, not published upstream.
How Holly compares to fellow Case Western Reserve University alumni
Among the 230 Case Western Reserve University graduates in the New York register, Holly Danielle Mergenhagen is longer-tenured than 7%.
14 years vs. Case Western Reserve University alumni
Years since admission - 230 NY-registered alumni of this school
14 Top 93% higher than 7% of 230 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
Case Western Reserve University's active-bar rate
Of Case Western Reserve University's 326 alumni in the New York register, 71.5% currently hold "Currently registered" status, above 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
- Due to reregister within 30 days of birthday
- Registration Number
- 5049234
- Year Admitted
- 2012 (14 yrs · mid-career)
- Judicial Department
- 4
- Next Registration
- Jun 2026
Location & Contact
- Company
- Seneca Holdings LLC
- City
- Williamsville, NY
- County
- Erie
- ZIP Code
- 14221
- Phone
- (716) 250-9389
Education
Status Distribution Across the New York Bar
Holly Danielle Mergenhagen's current status, "Due to reregister within 30 days of birthday", places this record outside 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.
Near-tenure Case Western Reserve University 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 Williamsville, a vintage cohort, not a neighborhood list.
Nationwide attorneys with similar admission year or city registry density
Two non-geo peer axes for Holly Danielle Mergenhagen: closest NY bar admission year outside NY, and closest out-of-state office cities by how many NY-registered attorneys they list (~457 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
Verify on NY Courts Attorney SearchNearby Attorneys in Williamsville, NY
Compare credentials side-by-side
Compare Holly Danielle Mergenhagen with similar attorneys in Williamsville.
Compare attorneys →Before you rely on this record
Holly Danielle Mergenhagen is currently listed as "Due to reregister within 30 days of birthday", treat that as a registration fact to confirm, not a verdict on quality.
Frequently Asked Questions
Where is Holly Mergenhagen licensed?
Holly Mergenhagen is licensed to practice law in New York.
When was Holly Danielle Mergenhagen admitted to the bar?
Holly Danielle Mergenhagen has been on the New York bar register since 2012.
Where did Holly Danielle Mergenhagen go to law school?
Holly Danielle Mergenhagen attended CASE WESTERN RESERVE UNIVERSITY.
What company does Holly Danielle Mergenhagen work for?
Holly Danielle Mergenhagen is associated with Seneca Holdings LLC in Williamsville, NY.
Is Holly Danielle Mergenhagen in good standing?
Not currently, Holly Danielle Mergenhagen's listed status is "Due to reregister within 30 days of birthday", not active standing. Confirm current status with the state bar.
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.