William M. Hartnett
On the New York attorney register since 1980 · office in New York, NY
PlainAttorney’s reading of the public register file, not a court record.
- Registration No.
- 1672872
- Admitted
- 1980 · First Department
- Status
- Currently registered
- Next registration
- Feb 2028
William M. Hartnett is currently registered on the New York attorney register file of Sep 29, 2026. Admitted in 1980 in the First Department, with an office in New York, NY; next registration due Feb 2028. The status is the same in all 3 files we hold.
What this status means on the register
On the register, “Currently registered” means William M. Hartnett has filed the biennial registration the court system requires; the next one is due in Feb 2028.
- Currently registered unchanged
- Currently registered unchanged
- Currently registered the first file we hold
Source: NY Office of Court Administration, attorney registration file (data.ny.gov, dataset eqw2-r5nb), downloaded Sep 29, 2026; the Jul 3, 2026 and Aug 6, 2026 files for the history.
Others who list this employer on the register
281 other attorneys list Cahill Gordon & Reindel LLP or one of its other names as their employer on the register; 8 of them were admitted before 1980, and 272 of the 282 give an office in New York, NY. The 5 whose admission is closest to 1980, earliest first:
| Attorney | Admitted | Status |
|---|---|---|
| Charles Alan Gilman | 1975 | Due to re‑register |
| Thorn Rosenthal | 1976 | Currently registered |
| Susan Buckley | 1978 | Currently registered |
| James J. Clark | 1980 | Currently registered |
| Lewis Rinaudo Cohen | 1987 | Currently registered |
Source: NY Office of Court Administration, attorney registration file (data.ny.gov, dataset eqw2-r5nb), downloaded Sep 29, 2026; employer spellings merged (methodology).
Where this record sits on the register
William M. Hartnett studied at Fordham University School of Law (the register spells it “FORDHAM”). 2,886 of its 20,418 living graduates on the register were admitted in the 1980s, as William M. Hartnett was.
- Same law school
- 20,418living graduates; 87.9% registered (current or due), against 87.1% overall
- Office in New York, NY
- 93,604living registrants
Of the 93,604 living registrants with an office in New York, NY, 4,958 were admitted before 1980 and 87,984 after.
Source: NY Office of Court Administration, attorney registration file (data.ny.gov, dataset eqw2-r5nb), downloaded Sep 29, 2026; living registrants only.
Questions this record leads to
- Everyone who lists Cahill Gordon & Reindel LLP282 on the register, 8 of the others admitted before 1980; 272 of the 282 give an office in New York, NY.
- Fordham University School of Law graduates on the register20,418 living, 87.9% registered; 52 of them list Cahill Gordon & Reindel LLP.
- Attorneys with an office in New York, NY93,604 living registrants give an office there.
- New York County’s registered bar75,989 currently registered, 46.63 per 1,000 residents.
- Admitted in 19804,659 people admitted in 1980 are on the register, 1,736 of them through the First Department.
- Every registration that reads “Currently registered”286,911 on the register file of Sep 29, 2026, by decade of admission.
- What a New York lawyer may chargeThe court rules on fees, retainers and fee disputes, each cited.
How to confirm it officially
For a statement of William M. Hartnett’s standing, contact the Attorney Registration Unit of the NY Office of Court Administration (nycourts.gov/attorneys), or ask the Appellate Division, First Department, which admitted William M. Hartnett in 1980. A complaint about this attorney would go to the First Department’s grievance committee, which covers New York County, where the register places the office.
This page reads the register file of Sep 29, 2026, and the court system’s own search can be newer; the register shows only the current value, so a suspension that ended before the files we hold, or a censure, leaves no trace here (Appellate Division decisions are published through the court system’s Law Reporting Bureau).