›Summary
Manning Gross + Massenburg is mapped by Sartori across 14 offices in 1 countries (National footprint), headquartered in Boston. Headcount band: 100–250 attorneys. Strongest mapped practices: Litigation & Disputes, Construction, Environmental. It appears in 2 Ranking Atlas pages. Profile compiled from public facts, last verified 23 Jul 2026.
01 — Public record
Facts on file
Compiled from public sources. Figures are shown as bands where exact counts are not published; nothing here is provided by the firm.
Website
Largest mapped office
Boston, US
Professionals
100–250 attorneys banded
Countries covered
1 via 14 offices
Office footprint — mapped metros
14 offices · 1 countriesPrincipal practices
Bold chips mark the firm’s deepest mapped practices (major or strong).
Seniority mix — banded, fee earners
≈125 partners · <5 counsel · 100+ associates
Mapped from public bios and firm pages; exact counts are not published, so figures are shown as approximate bands.
Sartori Firm Index — footprint (a different lens from the Atlas tiers)
National · coverage 2 of 336.5
Composite SFI
SFI sub-index · banded
52.5
Scale
SFI sub-index · banded
14.3
Reach
SFI sub-index · banded
The Sartori Firm Index measures footprint and momentum (scale · reach · hiring), not practice quality. It never assigns an Atlas tier, and the Atlas never reuses this number — the two lenses are deliberately separate.
02 — Where this firm is ranked
Ranking Atlas & Firm Index
No composite firm score is published. Atlas tiers are assigned per market or practice from public footprint and evidence; the Firm Index leaderboards are a separate footprint lens.
2 listings · Atlas tiers apply only within their own market or practice
| Listing | Type | Tier | |
|---|---|---|---|
| Best law firms in Dallas | Atlas ranking | Notable in this field | → |
| Best law firms in Miami | Atlas ranking | Notable in this field | → |
03 — Sources & verification Last verified 23 Jul 2026 · next review by 23 Aug 2026 · change log
Public sources
- 1 Locations | MG+M The Law Firmfirm_website · 2026-07-21
- 2 Locations | MG+M The Law Firmfirm_website · 2026-07-21
- 3 Locations | MG+M The Law Firmfirm_website · 2026-07-21
- 4 Locations | MG+M The Law Firmfirm_website · 2026-07-21
- 5 Locations | MG+M The Law Firmfirm_website · 2026-07-21
- 6 Locations | MG+M The Law Firmfirm_website · 2026-07-21
- 7 Locations | MG+M The Law Firmfirm_website · 2026-07-21
- 8 Walnut Creek, CA | MG+M The Law Firmfirm_website · 2026-07-21
- 9 Locations | MG+M The Law Firmfirm_website · 2026-07-21
- 10 Locations | MG+M The Law Firmfirm_website · 2026-07-21
- 11 Locations | MG+M The Law Firmfirm_website · 2026-07-21
- 12 Locations | MG+M The Law Firmfirm_website · 2026-07-21
- 13 New Jersey | MG+M The Law Firmfirm_website · 2026-07-21
- 14 Locations | MG+M The Law Firmfirm_website · 2026-07-21
- 15 MG+M to Open Edwardsville, Illinois, Officefirm_website · 2026-07-21
- 16 MG+M Boston Office Recognized Among Boston Business Journal's 2026 Best Places to Workfirm_website · 2026-07-21
- 17 MG+M Edwardsville Office Now Officially Open at The Station on Mainfirm_website · 2026-07-21
- 18 MG+M Edwardsville Office Now Officially Open at The Station on Mainfirm_website · 2026-07-21
- 19 MG+M to Open Edwardsville, Illinois, Officefirm_website · 2026-07-21
Know the limits of this data
- —Figures are bands, not audited counts; public sources lag reality by weeks or months.
- —Atlas tiers are Sartori’s independent editorial opinion — not the firm’s claim, and not a client-satisfaction measure.
- —No firm-level numeric score exists; Atlas tiers apply only within their own market or practice.
- —No third-party legal-directory band is used as an input.
Corrections from the firm or its representatives are reviewed within five working days.
Change log
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Discuss a mandate →Manning Gross + Massenburg is profiled here independently by Sartori. This page is not affiliated with, endorsed by, or produced in cooperation with the firm; firm names are used for identification only and no logo or brand assets are reproduced. Rankings reflect Sartori’s editorial methodology and public mapping — they are not legal advice, nor a recommendation to instruct counsel.