2009 Premium and Market Share - WORKERS' COMPENSATION

NAIC#

Company Name

State

Premium Written in MA as of 12/31/2009

Market Share in MA as of 12/31/2009

33758

Associated Industries Of MA Mut Ins

MA

$55,123,915

6.78%

19445

National Union Fire Ins Co Of Pitts

PA

$53,091,710

6.53%

29459

Twin City Fire Ins Co Co

IN

$33,033,177

4.06%

25658

Travelers Ind Co

CT

$30,076,320

3.70%

42404

Liberty Ins Corp

IL

$28,869,255

3.55%

23035

Liberty Mut Fire Ins Co

WI

$25,061,895

3.08%

44326

Atlantic Charter Ins Co

MA

$22,298,348

2.74%

23043

Liberty Mut Ins Co

MA

$20,403,707

2.51%

19429

Insurance Co Of The State Of PA

PA

$20,383,706

2.51%

40142

American Zurich Ins Co

IL

$20,268,157

2.49%

25674

Travelers Prop Cas Co Of Amer

CT

$16,405,204

2.02%

23809

Granite State Ins Co

PA

$15,769,475

1.94%

16535

Zurich Amer Ins Co

NY

$15,633,154

1.92%

11984

Independence Cas Ins Co

MA

$14,948,899

1.84%

12886

Massachusetts Employers Ins Co

MA

$14,523,490

1.79%

11104

Associated Employers Ins Co

MA

$14,138,799

1.74%

25666

Travelers Ind Co Of Amer

CT

$12,596,099

1.55%

23841

New Hampshire Ins Co

PA

$11,642,674

1.43%

37478

Hartford Ins Co Of The Midwest

IN

$11,266,021

1.39%

19410

Commerce & Industry Ins Co

NY

$10,542,017

1.30%

29424

Hartford Cas Ins Co

IN

$10,488,533

1.29%

30104

Hartford Underwriters Ins Co

CT

$10,476,413

1.29%

19682

Hartford Fire In Co

CT

$9,664,089

1.19%

31470

Norguard Ins Co

PA

$9,610,384

1.18%

20281

Federal Ins Co

IN

$9,041,992

1.11%

23817

Illinois Natl Ins Co

IL

$8,978,823

1.10%

41360

Arbella Protection Ins Co

MA

$8,794,769

1.08%

24198

Peerless Ins Co

NH

$8,583,203

1.06%

25682

Travelers Ind Co Of CT

CT

$8,197,814

1.01%

43575

Indemnity Ins Co Of North Amer

PA

$8,012,827

0.99%

20508

Valley Forge Ins Co

PA

$7,963,222

0.98%

19038

Travelers Cas & Surety Co

CT

$7,613,976

0.94%

42376

Technology Ins Co Inc

NH

$7,579,090

0.93%

31325

Acadia Ins Co

NH

$7,520,567

0.93%

19380

American Home Assur Co

NY

$7,079,165

0.87%

20699

Ace Prop & Cas Ins Co

PA

$6,483,198

0.80%

18023

Star Ins Co

MI

$6,014,335

0.74%

19801

Argonaut Ins Co

IL

$5,896,689

0.73%

26042

Wausau Underwriters Ins Co

WI

$5,440,150

0.67%

21458

Employers Ins of Wausau

WI

$5,359,724

0.66%

11045

Excelsior Ins Co

NH

$5,258,247

0.65%

25615

Charter Oak Fire Ins Co

CT

$5,256,302

0.65%

22292

Hanover Ins Co

NH

$4,861,486

0.60%

13803

Farm Family Cas Ins Co

NY

$4,838,394

0.60%

21113

United States Fire Ins Co

DE

$4,719,091

0.58%

10804

Continental Western Ins Co

IA

$4,713,628

0.58%

14788

NGM Ins Co

FL

$4,604,635

0.57%

22667

Ace Amer Ins Co

PA

$4,578,774

0.56%

26069

Wausau Business Ins Co

WI

$4,565,562

0.56%

14702

Eastguard Ins Co

PA

$4,548,749

0.56%

42390

Amguard Ins Co

PA

$4,460,917

0.55%

25623

Phoenix Ins Co

CT

$4,316,097

0.53%

23965

Norfolk & Dedham Mut Fire Ins Co

MA

$4,302,450

0.53%

20443

Continental Cas Co

IL

$4,128,861

0.51%

20648

Employers Fire Ins Co

MA

$4,118,979

0.51%

11030

Memic Ind Co

NH

$4,116,297

0.51%

10017

Arbella Ind Ins Co

MA

$4,104,805

0.50%

20494

Transportation Ins Co

IL

$3,876,789

0.48%

21261

Electric Ins Co

MA

$3,812,399

0.47%

28258

Continental Ind Co

IA

$3,690,443

0.45%

13374

Arrow Mut Liab Ins Co

MA

$3,661,772

0.45%

15059

Public Serv Mut Ins Co

NY

$3,645,759

0.45%

20478

National Fire Ins Co Of Hartford

IL

$3,600,097

0.44%

24171

Netherlands Ins Co The

NH

$3,527,320

0.43%

10664

Endeavour Ins Co

MA

$3,509,432

0.43%

22357

Hartford Accident & Ind Co

CT

$3,268,864

0.40%

24988

Sentry Ins A Mut Co

WI

$3,258,243

0.40%

20230

Central Mut Ins Co

OH

$3,211,883

0.40%

21784

Firemens Ins Co Of Washington DC

DE

$2,926,122

0.36%

20346

Pacific Ind Co

WI

$2,617,801

0.32%

16551

Savers Prop & Cas Ins Co

MO

$2,523,266

0.31%

12262

Pennsylvania Manufacturers Assoc Ins

PA

$2,437,418

0.30%

20222

All Amer Ins Co

OH

$2,371,257

0.29%

33588

First Liberty Ins Corp

IL

$2,304,256

0.28%

12475

Republic Franklin Ins Co

OH

$2,126,363

0.26%

40177

Paramount Ins Co

NY

$2,114,267

0.26%

26182

Harleysville Worcester Ins Co

PA

$1,995,561

0.25%

13706

Dorchester Mut Ins Co

MA

$1,993,894

0.25%

25011

Wesco Ins Co

DE

$1,954,119

0.24%

25984

Graphic Arts Mut Ins Co

NY

$1,908,530

0.23%

25844

Union Ins Co

IA

$1,832,857

0.23%

12777

Chubb Ind Ins Co

NY

$1,809,970

0.22%

31534

Citizens Ins Co Of Amer

MI

$1,806,515

0.22%

32620

National Interstate Ins Co

OH

$1,792,370

0.22%

24139

Old Republic Gen Ins Corp

IL

$1,785,269

0.22%

13935

Federated Mut Ins Co

MN

$1,773,318

0.22%

21105

North River Ins Co

NJ

$1,715,085

0.21%

11150

Arch Ins Co

MO

$1,674,872

0.21%

20702

Ace Fire Underwriters Ins Co

PA

$1,655,369

0.20%

20427

American Cas Co Of Reading PA

PA

$1,578,871

0.19%

19356

Maryland Cas Co

MD

$1,569,966

0.19%

25976

Utica Mut Ins Co

NY

$1,566,121

0.19%

21172

Vanliner Ins Co

MO

$1,565,438

0.19%

12904

Tokio Marine & Nichido Fire Ins Co

NY

$1,526,806

0.19%

24147

Old Republic Ins Co

PA

$1,502,122

0.18%

25224

Great Divide Ins Co

ND

$1,450,957

0.18%

26247

American Guar & Liab Ins

NY

$1,443,382

0.18%

20621

OneBeacon Amer Ins Co

MA

$1,335,901

0.16%

19259

Selective Ins Co Of SC

IN

$1,300,597

0.16%

19372

Northern Ins Co Of NY

NY

$1,199,560

0.15%

39926

Selective Ins Co Of The Southeast

IN

$1,199,349

0.15%

28460

Sentry Cas Co

WI

$1,194,411

0.15%

20397

Vigilant Ins Co

NY

$949,260

0.12%

13978

Florists Mut Ins Co

IL

$906,970

0.11%

20303

Great Northern Ins Co

IN

$871,329

0.11%

20362

Mitsui Sumitomo Ins Co of Amer

NY

$855,137

0.11%

25887

United States Fidelity & Guar Co

CT

$852,611

0.10%

33600

LM Ins Corp

IL

$852,594

0.10%

36064

Hanover Amer Ins Co

NH

$841,337

0.10%

19305

Assurance Co Of Amer

NY

$824,195

0.10%

23108

Lumbermens Underwriting Alliance

MO

$740,752

0.09%

24414

General Cas Co Of WI

WI

$726,495

0.09%

18767

Church Mut Ins Co

WI

$724,367

0.09%

26425

Wausau Gen Ins Co

WI

$720,900

0.09%

23329

Merchants Mut Ins Co

NY

$708,155

0.09%

21180

Sentry Select Ins Co

WI

$704,425

0.09%

19704

American States Ins Co

IN

$657,728

0.08%

15563

SeaBright Ins Co

IL

$652,912

0.08%

13714

Pharmacists Mut Ins Co

IA

$643,500

0.08%

29939

Main St Amer Assur Co

FL

$624,413

0.08%

37885

XL Specialty Ins Co

DE

$609,383

0.07%

28886

Transguard Ins Co Of Amer Inc

IL

$595,812

0.07%

15067

Quincy Mut Fire Ins Co

MA

$594,783

0.07%

21857

American Ins Co

OH

$575,772

0.07%

35696

Harleysville Preferred Ins Co

PA

$549,406

0.07%

10665

Ameritrust Ins Corp

MI

$540,471

0.07%

12416

Protective Ins Co

IN

$508,291

0.06%

23442

Patriot Gen Ins Co

WI

$504,704

0.06%

12901

Merchants Preferred Ins Co

NY

$498,747

0.06%

13943

Fitchburg Mut Ins Co

MA

$475,425

0.06%

13083

Employers Security Assur Co

MA

$472,105

0.06%

23434

Middlesex Ins Co

WI

$469,786

0.06%

20613

Sparta Ins Co

CT

$413,614

0.05%

14982

Penn Millers Ins Co

PA

$400,386

0.05%

11126

Sompo Japan Ins Co of Amer

NY

$372,019

0.05%

21865

Associated Ind Corp

CA

$355,375

0.04%

22306

Massachusetts Bay Ins Co

NH

$351,483

0.04%

21873

Firemans Fund Ins Co

CA

$349,575

0.04%

26832

Great Amer Alliance Ins Co

OH

$340,222

0.04%

10800

Premier Grp Ins Co Inc

TN

$339,747

0.04%

22322

Greenwich Ins Co

DE

$328,044

0.04%

19402

Chartis Prop Cas Co

PA

$327,493

0.04%

23582

Harleysville Ins Co

PA

$321,860

0.04%

18279

Bankers Standard Ins Co

PA

$307,703

0.04%

22748

Pacific Employers Ins Co

PA

$307,476

0.04%

11149

Maine Employers Mut Ins Co

ME

$294,858

0.04%

10687

Utica Natl Assur Co

NY

$279,468

0.03%

15105

Safety Natl Cas Corp

MO

$278,157

0.03%

24074

Ohio Cas Ins Co

OH

$277,594

0.03%

19690

American Economy Ins Co

IN

$263,693

0.03%

19399

AIU Ins Co

NY

$246,206

0.03%

22136

Great Amer Ins Co of NY

NY

$243,648

0.03%

10120

Everest Natl Ins Co

DE

$240,728

0.03%

21881

National Surety Corp

IL

$223,701

0.03%

10677

Cincinnati Ins Co

OH

$200,699

0.02%

21415

Employers Mut Cas Co

IA

$191,134

0.02%

22977

Lumbermens Mut Cas Co

IL

$160,184

0.02%

18333

Peerless Ind Ins Co

IL

$154,676

0.02%

29874

North Amer Specialty Ins Co

NH

$149,132

0.02%

37893

Ullico Cas Co

DE

$136,972

0.02%

24554

XL Ins Amer Inc

DE

$134,498

0.02%

42552

Nova Cas Co

NY

$126,609

0.02%

44300

Tower Ins Co Of NY

NY

$118,416

0.01%

36463

Discover Prop & Cas Ins Co

IL

$108,998

0.01%

10642

Cherokee Ins Co

MI

$103,668

0.01%

24449

Regent Ins Co

WI

$100,485

0.01%

21970

OneBeacon Ins Co

PA

$97,889

0.01%

23612

Midwest Employers Cas Co

DE

$95,202

0.01%

10166

Accident Fund Ins Co of Amer

MI

$89,139

0.01%

36234

Preferred Professional Ins Co

NE

$86,305

0.01%

41238

Trans Pacific Ins Co

NY

$69,723

0.01%

25879

Fidelity & Guar Ins Underwriters Inc

WI

$58,953

0.01%

43702

Tower Natl Ins Co

MA

$57,500

0.01%

12866

T H E Ins Co

LA

$53,921

0.01%

32271

Dallas Natl Ins Co

TX

$53,431

0.01%

15032

Guideone Mut Ins Co

IA

$43,214

0.01%

25143

State Farm Fire & Cas Co

IL

$40,544

0.00%

24678

Arrowood Ind Co

DE

$34,111

0.00%

28304

Federated Serv Ins Co

MN

$32,321

0.00%

35386

Fidelity & Guar Ins Co

IA

$32,289

0.00%

11371

Great West Cas Co

NE

$29,465

0.00%

21709

Truck Ins Exch

CA

$28,919

0.00%

12297

Petroleum Cas Co

TX

$27,790

0.00%

22187

Greater NY Mut Ins Co

NY

$26,849

0.00%

13269

Zenith Ins Co

CA

$23,405

0.00%

23337

American European Ins Co

NH

$19,760

0.00%

23396

Amerisure Mut Ins Co

MI

$18,589

0.00%

27073

Nipponkoa Ins Co Ltd US Br

NY

$16,749

0.00%

39845

Westport Ins Corp

MO

$16,534

0.00%

14168

Harleysville Mut Ins Co

PA

$16,401

0.00%

21849

American Automobile Ins Co

MO

$15,872

0.00%

35289

Continental Ins Co

PA

$15,683

0.00%

44393

West Amer Ins Co

IN

$15,537

0.00%

11123

Safety First Ins Co

IL

$15,276

0.00%

16691

Great Amer Ins Co

OH

$15,246

0.00%

41181

Universal Underwriters Ins Co

KS

$15,005

0.00%

24066

American Fire & Cas Co

OH

$13,492

0.00%

40517

Advantage Workers Comp Ins Co

IN

$11,453

0.00%

31895

American Interstate Ins Co

LA

$9,214

0.00%

12304

Accident Fund Gen Ins Co

MI

$5,838

0.00%

42650

OneBeacon Midwest Ins Co

WI

$5,352

0.00%

10205

Mountain Valley Ind Co

NH

$5,323

0.00%

24732

General Ins Co Of Amer

WA

$5,088

0.00%

27154

Atlantic Specialty Ins Co

NY

$4,208

0.00%

19488

Amerisure Ins Co

MI

$3,604

0.00%

22918

American Motorists Ins Co

IL

$2,189

0.00%

18538

Bancinsure Inc

OK

$1,929

0.00%

20710

Century Ind Co

PA

$1,732

0.00%

24082

Ohio Security Ins Co

OH

$1,531

0.00%

12305

Accident Fund Natl Ins Co

MI

$1,494

0.00%

20095

Bituminous Cas Corp

IL

$1,265

0.00%

19895

Atlantic Mut Ins Co

NY

$867

0.00%

13331

American Hardware Mut Ins Co

OH

$582

0.00%

14990

Pennsylvania Natl Mut Cas Ins Co

PA

$272

0.00%

11000

Sentinel Ins Co Ltd

CT

$48

0.00%

40320

Massachusetts Homeland Ins Co

MA

$18

0.00%

Total Direct Written Premium

$813,020,627

100.00%