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State atlas

Northeast / U.S. individual health insurance

Massachusetts

Massachusetts's statewide bank deposit concentration rose 176 points between 2015 and 2025, to an HHI of 1,637, ranking 8 of 51 jurisdictions. What is HHI?

This page also covers 2024 individual health-insurance concentration, 2026-07 business applications, and 14 county banking screens, each with its source, a download, and national and regional comparisons.

Highly concentratedHHI rank #21 / 5130 jurisdictions below this HHIBank-deposit HHI 1,6377,497 monthly applications14 local banking screens

Applications

7,497

2026-07 / rank #25

Application YoY

+14%

Rank #38 of 51

Banking HHI

1,637

Rank #8 of 51

Insurance HHI

3,864

Rank #21 of 51

Insurance evidence / 2024

MA within the 51-jurisdiction field

MA
Insurance HHI across 51 jurisdictionsA comparative choropleth of U.S. individual health insurance. Massachusetts is selected; focus or hover another jurisdiction to inspect its exact value and national rank.Alaska: Insurance HHI 6,102; rank 2 of 51Alabama: Insurance HHI 3,963; rank 18 of 51Arkansas: Insurance HHI 4,983; rank 12 of 51Arizona: Insurance HHI 2,410; rank 40 of 51California: Insurance HHI 2,389; rank 41 of 51Colorado: Insurance HHI 2,334; rank 43 of 51Connecticut: Insurance HHI 4,975; rank 13 of 51District of Columbia: Insurance HHI 6,945; rank 1 of 51Delaware: Insurance HHI 5,925; rank 4 of 51Florida: Insurance HHI 2,868; rank 32 of 51Georgia: Insurance HHI 2,464; rank 37 of 51Hawaii: Insurance HHI 5,385; rank 9 of 51Iowa: Insurance HHI 5,965; rank 3 of 51Idaho: Insurance HHI 2,353; rank 42 of 51Illinois: Insurance HHI 3,666; rank 22 of 51Indiana: Insurance HHI 2,957; rank 31 of 51Kansas: Insurance HHI 2,561; rank 36 of 51Kentucky: Insurance HHI 3,644; rank 23 of 51Louisiana: Insurance HHI 3,450; rank 25 of 51Massachusetts: Insurance HHI 3,864; rank 21 of 51Maryland: Insurance HHI 4,225; rank 15 of 51Maine: Insurance HHI 3,414; rank 26 of 51Michigan: Insurance HHI 2,413; rank 39 of 51Minnesota: Insurance HHI 3,547; rank 24 of 51Missouri: Insurance HHI 2,437; rank 38 of 51Mississippi: Insurance HHI 2,793; rank 35 of 51Montana: Insurance HHI 3,955; rank 19 of 51North Carolina: Insurance HHI 3,255; rank 29 of 51North Dakota: Insurance HHI 4,878; rank 14 of 51Nebraska: Insurance HHI 4,116; rank 17 of 51New Hampshire: Insurance HHI 5,804; rank 5 of 51New Jersey: Insurance HHI 3,387; rank 28 of 51New Mexico: Insurance HHI 3,222; rank 30 of 51Nevada: Insurance HHI 2,811; rank 34 of 51New York: Insurance HHI 1,582; rank 50 of 51Ohio: Insurance HHI 1,619; rank 49 of 51Oklahoma: Insurance HHI 3,916; rank 20 of 51Oregon: Insurance HHI 2,071; rank 47 of 51Pennsylvania: Insurance HHI 2,222; rank 45 of 51Rhode Island: Insurance HHI 5,433; rank 8 of 51South Carolina: Insurance HHI 4,167; rank 16 of 51South Dakota: Insurance HHI 3,396; rank 27 of 51Tennessee: Insurance HHI 2,831; rank 33 of 51Texas: Insurance HHI 2,311; rank 44 of 51Utah: Insurance HHI 5,304; rank 10 of 51Virginia: Insurance HHI 2,213; rank 46 of 51Vermont: Insurance HHI 5,648; rank 7 of 51Washington: Insurance HHI 1,772; rank 48 of 51Wisconsin: Insurance HHI 1,474; rank 51 of 51West Virginia: Insurance HHI 5,025; rank 11 of 51Wyoming: Insurance HHI 5,695; rank 6 of 51
Below 1,5001,500-2,4992,500-3,4993,500-4,9995,000+
Selected MA
3,864
Northeast average
4,037
U.S. anchor
3,650
KFF / U.S. individual health insurance. Each lens remains a separate descriptive screen, not an overall-economy score.
  • GeographyExact state joinMA across 51 jurisdictions
  • SystemsThree source lanesFormation / banking / insurance
  • AlignmentPostal code only2026-07 / 2025 / 2024
  • Permitted useSource-native contextNo composite or common-market claim

Cross-system evidence

Three source systems in Massachusetts

The shared state boundary supports navigation, not combination. Each panel keeps its own market, period, participant unit, source, and permitted use.

Open three-system atlas
Census BFS / 2026-07

Monthly business applications

7,497Count rank #25 / 51

+14% from one year earlier; applications are selected EIN applications, not observed operating firms.

U.S. share
1.29%
High-propensity
34.1%
Projected 4Q
581
KFF / 2024

ACA individual insurance

3,864HHI rank #21 / 51

Highly concentrated; the leading insurer holds 56% and 4 insurers exceed 5% share.

Top insurer
56%
Rivals >5%
4
U.S. HHI
3,650
FDIC SOD / 2025

Statewide branch deposits

1,637HHI rank #8 / 51

Moderately concentrated statewide screen; State Street Corporation leads with 34.5% of reported branch deposits.

Deposits
$602.8B
Organizations
114
Branches
1,858

No cross-system score

This atlas joins three separately defined state-level systems by exact postal code: monthly Census Business Formation Statistics, a statewide FDIC branch-deposit concentration screen, and KFF's ACA-regulated individual-insurance market concentration. Shared geography does not make the product markets, denominators, populations, periods, or competitive meanings equivalent. Positions are descriptive context, not a composite score, causal estimate, statewide legal antitrust market, measure of startup success, or evidence that applications and concentration move together for a common reason.

Census business formation

Monthly formation signals in Massachusetts

Applications, high-propensity applications, and projected four-quarter formations retain their Census definitions and publication statuses.
Latest month
Jul 2026
Observed path
60 months
State field
51 jurisdictions
Monthly source pathBusiness applications and high-propensity applications

Aug 2021 to Jul 2026 / counts

Massachusetts monthly business formation applications60 monthly Census observations from 2021-08 through 2026-07. Business Applications and High-Propensity Business Applications are shown as separate count paths.9,0004,50002021202220232024202520262026
Business applications High-propensity applicationsZero-based count scale
Latest applications7,4977,317 state median#25 / 51
Annual change+14%+22.1% state median#38 / 51
High-propensity mix34.1%26.5% state median#3 / 51
Projected formation share7.7%5.3% state median#4 / 51

Source and interpretation contract

U.S. Census Bureau

July 2026 Business Formation Statistics / 2026-07. The FDIC lane aggregates reported branch deposits statewide and is not a deposit or lending market definition. The KFF lane covers the ACA-regulated individual insurance market, not health care generally. Census applications are selected EIN applications, not operating firms or observed employer formations in the publication month.

This atlas joins three separately defined state-level systems by exact postal code: monthly Census Business Formation Statistics, a statewide FDIC branch-deposit concentration screen, and KFF's ACA-regulated individual-insurance market concentration. Shared geography does not make the product markets, denominators, populations, periods, or competitive meanings equivalent. Positions are descriptive context, not a composite score, causal estimate, statewide legal antitrust market, measure of startup success, or evidence that applications and concentration move together for a common reason.

Longitudinal banking evidence

A decade of statewide branch-deposit structure

Track Massachusetts across 11 exact annual FDIC vintages. State ranks reset each year, the median preserves the 51-jurisdiction comparison field, and the U.S. aggregate retains its separate national denominator.

Observed span2015-2025June 30 snapshots
Annual coverage11 / 11Complete 51-state panel
HHI change+1761,461 to 1,637
Latest HHI rank#8of 51 jurisdictions
Metric

State deposit HHI

11 exact observationsMassachusetts against the U.S. banking field
20151,461 20251,637
State deposit HHI for Massachusetts from 2015 through 2025, compared with the annual state median and U.S. aggregate.Select an observed year to compare Massachusetts with the annual 51-state median and U.S. aggregate. No values are interpolated.
2025Massachusetts1,63751-state median903U.S. aggregate401
Annual evidence ledgerEvery published state input and benchmark
Ranks reset within each annual 51-state universe
YearHHIState rankState medianU.S. aggregateLeader shareOrganizationsBranchesDepositsLeading organization
20151,461#11 / 5195841032.0%1632,160$371.4BState Street Corporation
20161,203#16 / 5194540926.2%1572,162$356.4BState Street Corporation
20171,131#17 / 5197742022.6%1482,142$350BState Street Corporation
20181,323#13 / 5196140628.3%1412,119$397.4BState Street Corporation
20191,244#15 / 5193839026.3%1342,106$407.5BState Street Corporation
20201,320#14 / 511,00541127.3%1292,089$497.7BState Street Corporation
20211,439#11 / 5197740830.5%1282,015$579.3BState Street Corporation
20221,366#11 / 5199140228.7%1251,932$579.5BState Street Corporation
20231,417#12 / 5197340729.6%1201,914$556.1BState Street Corporation
20241,498#11 / 5191339831.9%1171,882$562.1BState Street Corporation
20251,637#8 / 5190340134.5%1141,858$602.8BState Street Corporation

Annual statewide and national rows are independent June 30 branch-deposit screens, not interpolated observations or legal market definitions. Reported ownership structures, branch booking, and jurisdiction coverage can change between vintages; deposit values are nominal and should not be read as inflation-adjusted growth.

Local banking layer

County and county-equivalent screens in Massachusetts

The local layer uses the same 2025 FDIC branch records and ownership rule as the statewide screen, but recalculates shares within each reported county or equivalent.

Published screens
14Positive branch-deposit rows
State median HHI
1,425County screen median
Highly concentrated
4HHI at or above 2,500
Single organization
0Reported-deposit screen

Within-state county atlas / 2025

Map the local banking field

Choose one comparable FDIC measure, inspect every published screen, then open the exact county record.

MA county field

County deposit HHI

Published screens
14
Selected rank
#1
Loading Census boundary layer
0–1,4991,500–2,5002,501–4,9995,000–7,4997,500–10,000Outside MANo positive-deposit screen

County rows are screens of positive FDIC Summary of Deposits branch balances grouped to the reported top bank holding company when available and otherwise to the insured institution. Branch-reported deposits may not represent where every customer lives or competes, county boundaries may not match a banking market, deposits are not every banking product, and these screens are not legal market definitions.

Benchmark table

State against the national market

KFF / 2024
HHI vs U.S.3,864U.S. 3,650+214above national HHI
Top share vs U.S.56%U.S. 48%+8%more held by the leader
Rival depth vs U.S.4U.S. 4+0as many or more meaningful rivals

Regional comparison

Northeast HHI peers

Massachusetts ranks #5 of 9 in the Northeast; its HHI is -173 from the regional average.

Nearest HHI peers

Closest public state values, regardless of region.

Public evidence packet

Reproduce the Massachusetts record

Exact state filters preserve the three source-native rows across the context atlas, single-market comparison studio, public API, CSV export, and evidence graph.

Formation
U.S. Census Bureau / 2026-07
Banking
Federal Deposit Insurance Corporation / 2025
Insurance
KFF / 2024

Geographic scope guardrail

This geography layer describes the ACA-regulated individual health insurance market using KFF's 2024 state-level measures. It does not measure a state's overall economy, employer-sponsored insurance, or a legal market definition. The FDIC lane aggregates reported branch deposits statewide and is not a deposit or lending market definition. The KFF lane covers the ACA-regulated individual insurance market, not health care generally. Census applications are selected EIN applications, not operating firms or observed employer formations in the publication month. This layer is a statewide screen of FDIC Summary of Deposits branch balances, grouped to the reported top bank holding company when available and otherwise to the insured institution. Banking antitrust markets are often local, deposits are not every banking product, and the screen is not a legal market definition. County rows are screens of positive FDIC Summary of Deposits branch balances grouped to the reported top bank holding company when available and otherwise to the insured institution. Branch-reported deposits may not represent where every customer lives or competes, county boundaries may not match a banking market, deposits are not every banking product, and these screens are not legal market definitions.

Read methods
Massachusetts bank and health insurance concentration | State Profile | Antitrust Radar