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Directory · Company · Updated 2026-10-18

National Union Fire Insurance Company of Pittsburgh, Pennsylvania · NAIC 19445

Where National Union Fire Insurance Company of Pittsburgh, Pennsylvania is admitted, where it's eligible for surplus lines, the lines it's licensed for and how much of each it writes, from state regulators' public lists and market share reports.

National Union Fire Insurance Company of Pittsburgh, Pennsylvania (NAIC 19445) is a property and casualty insurer domiciled in Pennsylvania, part of American International Group. State regulators list it as licensed (admitted) in Alaska, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Iowa, Idaho, Illinois, Kentucky, Massachusetts, Maryland, Minnesota, Missouri, Mississippi, North Carolina, North Dakota, Nebraska, New Jersey, Nevada, New York, Ohio, Oklahoma, Oregon, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Washington, Wisconsin, Wyoming. It ranked #1 of 75 in California ocean marine in 2025 (14.4% share). It ranked #1 of 81 in Texas ocean marine in 2025 (16.2% share). It ranked #1 of 93 in Illinois ocean marine in 2025 (43.9% share). The U.S. Treasury lists it as a certified surety with a $584.7M underwriting limit.

By Sam Alishahi, independent insurance broker · All companies

By state

Where it's licensed

States whose regulator lists are loaded: Alaska, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Iowa, Idaho, Illinois, Kentucky, Massachusetts, Maryland, Minnesota, Missouri, Mississippi, Montana, North Carolina, North Dakota, Nebraska, New Jersey, Nevada, New York, Ohio, Oklahoma, Oregon, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Washington, Wisconsin, West Virginia, Wyoming. Not on the lists we have for Montana, West Virginia, which doesn't by itself mean it isn't licensed there.

StateStatusLines licensedSinceSource
AlaskaAdmitted (licensed)——Alaska, 2026-10-18
CaliforniaAdmitted (licensed)Aircraft and aviation, Equipment breakdown, Commercial auto, Commercial package (BOP, CMP), Crime (burglary and theft), Earthquake, Fidelity bonds, Inland marine, General liability, Medical malpractice, Ocean marine, Commercial property (fire and allied lines), Surety bonds, Workers' compensation—California Department of Insurance, 2026-10-17
ColoradoAdmitted (licensed)Aircraft and aviation, Personal auto, Equipment breakdown, Commercial auto, Commercial package (BOP, CMP), Credit, Crime (burglary and theft), Earthquake, Fidelity bonds, Flood, Inland marine, General liability, Medical malpractice, Ocean marine, Professional liability (E&O), Commercial property (fire and allied lines), Surety bonds, Umbrella and excess, Workers' compensation—Colorado, 2026-10-18
ConnecticutAdmitted (licensed)——Connecticut, 2026-10-18
DelawareAdmitted (licensed)——Delaware, 2026-10-18
FloridaAdmitted (licensed)Aircraft and aviation, Personal auto, Commercial auto, Commercial package (BOP, CMP), Earthquake, Fidelity bonds, Homeowners, Inland marine, General liability, Medical malpractice, Ocean marine, Commercial property (fire and allied lines), Surety bonds, Workers' compensation—Florida Office of Insurance Regulation, 2026-10-18
GeorgiaAdmitted (licensed)General liability, Commercial property (fire and allied lines), Surety bonds, Workers' compensation—Georgia, 2026-10-18
HawaiiAdmitted (licensed)——Hawaii, 2026-10-18
IdahoAdmitted (licensed)Fidelity bonds, General liability, Ocean marine, Commercial property (fire and allied lines), Surety bonds, Workers' compensation—Idaho, 2026-10-18
IllinoisAdmitted (licensed)Aircraft and aviation, Personal auto, Equipment breakdown, Commercial auto, Commercial package (BOP, CMP), Credit, Crime (burglary and theft), Earthquake, Fidelity bonds, Flood, Inland marine, General liability, Medical malpractice, Ocean marine, Professional liability (E&O), Commercial property (fire and allied lines), Surety bonds, Umbrella and excess, Workers' compensation—Illinois, 2026-10-18
IowaAdmitted (licensed)——Iowa, 2026-10-18
KentuckyAdmitted (licensed)——Kentucky Department of Insurance, 2026-10-17
MarylandAdmitted (licensed)——Maryland Insurance Administration, 2026-10-17
MassachusettsAdmitted (licensed)Personal auto, Fidelity bonds, General liability, Surety bonds, Workers' compensation—Massachusetts, 2026-10-18
MinnesotaAdmitted (licensed)——Minnesota, 2026-10-18
MississippiAdmitted (licensed)Aircraft and aviation, Personal auto, Equipment breakdown, Farm and crop, Fidelity bonds, Glass, Homeowners, Inland marine, General liability, Ocean marine, Commercial property (fire and allied lines), Surety bonds, Workers' compensation03-01-1930Mississippi Insurance Department, 2026-10-17
MissouriAdmitted (licensed)Personal auto, Commercial auto, Commercial package (BOP, CMP), Credit, Earthquake, Fidelity bonds, Inland marine, General liability, Medical malpractice, Ocean marine, Commercial property (fire and allied lines), Surety bonds, Umbrella and excess, Workers' compensation—Missouri, 2026-10-18
NebraskaAdmitted (licensed)——Nebraska, 2026-10-18
NevadaAdmitted (licensed)General liability, Ocean marine, Commercial property (fire and allied lines), Surety bonds, Workers' compensation—Nevada Division of Insurance, 2026-10-17
New JerseyAdmitted (licensed)——New Jersey, 2026-10-18
New YorkAdmitted (licensed)——Excess Line Association of New York (DFS-licensed and eligible excess line insurers), 2026-10-17
North CarolinaAdmitted (licensed)Aircraft and aviation, Personal auto, Equipment breakdown, Commercial auto, Commercial package (BOP, CMP), Credit, Crime (burglary and theft), Earthquake, Fidelity bonds, Flood, Inland marine, General liability, Medical malpractice, Ocean marine, Professional liability (E&O), Commercial property (fire and allied lines), Surety bonds, Umbrella and excess, Workers' compensation—North Carolina, 2026-10-18
North DakotaAdmitted (licensed)——North Dakota, 2026-10-18
OhioAdmitted (licensed)——Ohio Department of Insurance, 2026-10-17
OklahomaAdmitted (licensed)Aircraft and aviation, Personal auto, Equipment breakdown, Credit, Crime (burglary and theft), Earthquake, Fidelity bonds, Flood, Inland marine, General liability, Ocean marine, Commercial property (fire and allied lines), Workers' compensation—Oklahoma, 2026-10-18
OregonAdmitted (licensed)Aircraft and aviation, Personal auto, Equipment breakdown, Commercial auto, Commercial package (BOP, CMP), Credit, Crime (burglary and theft), Earthquake, Fidelity bonds, Flood, Inland marine, General liability, Medical malpractice, Ocean marine, Professional liability (E&O), Commercial property (fire and allied lines), Umbrella and excess, Workers' compensation—Oregon, 2026-10-18
Rhode IslandAdmitted (licensed)——Rhode Island, 2026-10-18
South CarolinaAdmitted (licensed)——South Carolina, 2026-10-18
South DakotaAdmitted (licensed)Aircraft and aviation, Personal auto, Equipment breakdown, Commercial auto, Commercial package (BOP, CMP), Crime (burglary and theft), Earthquake, Fidelity bonds, Flood, Inland marine, General liability, Medical malpractice, Ocean marine, Professional liability (E&O), Commercial property (fire and allied lines), Umbrella and excess, Workers' compensation—South Dakota, 2026-10-18
TennesseeAdmitted (licensed)——Tennessee, 2026-10-18
TexasAdmitted (licensed)Aircraft and aviation, Personal auto, Equipment breakdown, Commercial auto, Commercial package (BOP, CMP), Credit, Crime (burglary and theft), Earthquake, Fidelity bonds, Flood, Glass, Inland marine, General liability, Medical malpractice, Ocean marine, Commercial property (fire and allied lines), Surety bonds, Workers' compensation1901/01/01Texas Department of Insurance, 2026-10-17
UtahAdmitted (licensed)——Utah, 2026-10-18
WashingtonAdmitted (licensed)Aircraft and aviation, Equipment breakdown, Commercial auto, Commercial package (BOP, CMP), Credit, Crime (burglary and theft), Fidelity bonds, Flood, Inland marine, General liability, Medical malpractice, Ocean marine, Workers' compensation—Washington Office of the Insurance Commissioner and the Surplus Line Association of Washington, 2026-10-17
WisconsinAdmitted (licensed)Personal auto, Commercial auto, Commercial package (BOP, CMP), Credit, Fidelity bonds, General liability, Medical malpractice, Commercial property (fire and allied lines), Surety bonds, Umbrella and excess, Workers' compensation—Wisconsin, 2026-10-18
WyomingAdmitted (licensed)——Wyoming, 2026-10-18
What it writes

Premium and rank by line

From the regulators that publish every company's direct premium by line.

Line and stateRankPremium writtenShareYear
Ocean marine in California#1 of 75$72.9M14.39%2025
Crime (burglary and theft) in California#3 of 110$6.7M13.84%2025
Aircraft and aviation in California#3 of 26$24.6M9.20%2025
Fidelity bonds in California#5 of 109$8.6M4.99%2025
Inland marine in California#6 of 248$74.7M2.45%2025
General liability in California#7 of 353$203.7M2.32%2025
Commercial auto in California#12 of 232$122.5M1.89%2025
Equipment breakdown in California#14 of 122$3.4M1.67%2025
Medical malpractice in California#32 of 35$84,3840.02%2025
Commercial package (BOP, CMP) in California#35 of 207$43.7M0.68%2025
Workers' compensation in California#39 of 245$86.8M0.72%2025
Surety bonds in California#107 of 148$81,6470.01%2025
Commercial property (fire and allied lines) in California#127 of 210$563,7630.01%2025
Earthquake in California#127 of 128$10.00%2025
Ocean marine in Illinois#1 of 93$89.8M43.93%2025
Aircraft and aviation in Illinois#1 of 33$29.3M25.74%2025
Fidelity bonds in Illinois#4 of 162$3.9M5.34%2025
Commercial auto in Illinois#8 of 448$73.1M2.28%2025
Equipment breakdown in Illinois#10 of 231$2.7M2.22%2025
Inland marine in Illinois#11 of 452$27.3M2.21%2025
Crime (burglary and theft) in Illinois#11 of 188$811,9342.20%2025
Credit in Illinois#11 of 48$2.5M2.37%2025
General liability in Illinois#38 of 695$40.4M0.62%2025
Flood in Illinois#43 of 128$233,4560.45%2025
Commercial package (BOP, CMP) in Illinois#68 of 400$10.8M0.38%2025
Earthquake in Illinois#69 of 265$176,7820.15%2025
Medical malpractice in Illinois#80 of 127$459,0290.07%2025
Surety bonds in Illinois#127 of 157$7,4530.00%2025
Workers' compensation in Illinois#180 of 375$3.1M0.13%2025
Commercial property (fire and allied lines) in Illinois#270 of 387$123,1950.01%2025
Ocean marine in North Carolina#2 of 87$17.9M14.66%2025
Aircraft and aviation in North Carolina#2 of 33$7.8M10.52%2025
General liability in North Carolina#3 of 621$55.9M1.89%2025
Fidelity bonds in North Carolina#4 of 145$3.2M7.67%2025
Commercial auto in North Carolina#5 of 408$62.0M2.99%2025
Inland marine in North Carolina#13 of 420$18.1M1.69%2025
Crime (burglary and theft) in North Carolina#16 of 162$169,4281.00%2025
Equipment breakdown in North Carolina#17 of 219$1.0M1.43%2025
Flood in North Carolina#18 of 124$1.5M1.14%2025
Earthquake in North Carolina#18 of 180$390,3591.85%2025
Credit in North Carolina#19 of 45$930,1631.09%2025
Commercial package (BOP, CMP) in North Carolina#25 of 361$17.0M0.99%2025
Workers' compensation in North Carolina#28 of 347$13.1M0.87%2025
Medical malpractice in North Carolina#38 of 122$1.1M0.52%2025
Commercial property (fire and allied lines) in North Carolina#265 of 340$39,1610.00%2025
Aircraft and aviation in South Dakota#1 of 26$2.5M17.58%2025
Ocean marine in South Dakota#1 of 35$561,58922.87%2025
Medical malpractice in South Dakota#5 of 31$351,0192.20%2025
Equipment breakdown in South Dakota#6 of 118$560,8734.02%2025
Crime (burglary and theft) in South Dakota#8 of 70$25,9572.97%2025
Fidelity bonds in South Dakota#8 of 79$116,5863.12%2025
Commercial package (BOP, CMP) in South Dakota#14 of 217$4.7M1.67%2025
Inland marine in South Dakota#15 of 248$2.0M1.80%2025
General liability in South Dakota#24 of 356$2.4M1.12%2025
Earthquake in South Dakota#28 of 78$2,4170.38%2025
Flood in South Dakota#29 of 60$11,4200.35%2025
Commercial auto in South Dakota#33 of 237$1.7M0.71%2025
Workers' compensation in South Dakota#91 of 284$416,6490.21%2025
Commercial property (fire and allied lines) in South Dakota#104 of 157$28,4600.02%2025
Ocean marine in Texas#1 of 81$65.9M16.21%2025
Aircraft and aviation in Texas#2 of 29$50.9M15.08%2025
Equipment breakdown in Texas#2 of 173$21.6M9.73%2025
General liability in Texas#5 of 463$211.0M3.15%2025
Fidelity bonds in Texas#5 of 123$6.0M6.08%2025
Commercial auto in Texas#7 of 329$225.6M2.86%2025
Commercial package (BOP, CMP) in Texas#8 of 260$98.4M2.26%2025
Earthquake in Texas#14 of 130$347,3291.28%2025
Credit in Texas#14 of 43$6.7M1.51%2025
Inland marine in Texas#15 of 356$49.6M1.53%2025
Crime (burglary and theft) in Texas#16 of 137$631,0650.92%2025
Workers' compensation in Texas#22 of 327$18.7M0.75%2025
Flood in Texas#24 of 91$2.3M0.46%2025
Medical malpractice in Texas#26 of 44$695,8620.30%2025
Surety bonds in Texas#147 of 165$6,8310.00%2025
Commercial property (fire and allied lines) in Texas#191 of 260$191,1770.00%2025
Aircraft and aviation in Washington#2 of 28$7.1M12.31%2025
Inland marine in Washington#3 of 40$50.2M8.94%2025
Ocean marine in Washington#3 of 40$11.9M5.01%2025
Fidelity bonds in Washington#5 of 40$1.5M6.31%2025
Crime (burglary and theft) in Washington#8 of 39$466,0005.36%2025
Equipment breakdown in Washington#12 of 40$826,0001.90%2025
General liability in Washington#12 of 91$29.9M2.68%2025
Commercial auto in Washington#14 of 65$16.7M1.87%2025
Credit in Washington#19 of 29$202,0000.42%2025
Medical malpractice in Washington#23 of 51$1.1M0.70%2025
Flood in Washington#24 of 52$250,0000.82%2025
Workers' compensation in Washington#24 of 39$209,0000.83%2025
Commercial package (BOP, CMP) in Washington#26 of 51$13.6M1.38%2025
Fidelity bonds in Wisconsin#5 of 118$1.5M6.25%2024
General liability in Wisconsin#13 of 429$23.7M1.85%2024
Credit in Wisconsin#21 of 30$177,0230.58%2024
Medical malpractice in Wisconsin#34 of 34$1810.00%2024
Commercial auto in Wisconsin#40 of 312$6.0M0.59%2024
Commercial package (BOP, CMP) in Wisconsin#46 of 276$4.9M0.45%2024
Workers' compensation in Wisconsin#76 of 312$3.4M0.18%2024
Personal auto in Wisconsin#111 of 155$778,4910.02%2024
Commercial property (fire and allied lines) in Wisconsin#135 of 210$32,3500.01%2024
Standing

Where it's a top-10 writer

American International Group (NAIC group 00012), the group National Union Fire Insurance Company of Pittsburgh, Pennsylvania belongs to, ranks in the top 10 for these lines and states. Top 10 insurer groups by direct premium written in 2025, from the NAIC's Market Share Reports for Property/Casualty Groups and Companies by State. A group is the parent and its insurance companies together; share is the group's part of the state total for the line; loss ratio is losses incurred over premium earned.

Line and stateRankPremium writtenShareYear
Ocean marine in Alabama
Ocean Marine
#1$7.3M11.77%2025
General liability in Alabama
Products Liability
#1$6.4M10.28%2025
Ocean marine in Alaska
Ocean Marine
#1$4.8M11.06%2025
Ocean marine in California
Ocean Marine
#1$87.3M16.48%2025
Ocean marine in Colorado
Ocean Marine
#1$5.0M16.58%2025
Aircraft and aviation in Connecticut
Aircraft
#1$4.0M14.65%2025
Earthquake in Delaware
Earthquake
#1$298,00013.52%2025
Fidelity bonds in Delaware
Fidelity
#1$2.5M27.91%2025
Equipment breakdown in Delaware
Boiler and Machinery
#1$1.1M13.15%2025
Ocean marine in Georgia
Ocean Marine
#1$27.1M23.19%2025
Ocean marine in Illinois
Ocean Marine
#1$90.8M44.46%2025
Aircraft and aviation in Illinois
Aircraft
#1$29.3M25.74%2025
Ocean marine in Indiana
Ocean Marine
#1$7.9M23.26%2025
Warranty in Indiana
Warranty
#1$31.6M47.11%2025
Ocean marine in Iowa
Ocean Marine
#1$3.1M24.54%2025
Ocean marine in Kansas
Ocean Marine
#1$3.3M25.95%2025
Earthquake in Louisiana
Earthquake
#1$2.0M23.51%2025
Aircraft and aviation in Louisiana
Aircraft
#1$9.8M20.00%2025
Aircraft and aviation in Maryland
Aircraft
#1$7.3M20.23%2025
Ocean marine in Minnesota
Ocean Marine
#1$8.4M19.35%2025
Earthquake in Minnesota
Earthquake
#1$1.1M14.72%2025
Ocean marine in Missouri
Ocean Marine
#1$8.2M14.38%2025
Aircraft and aviation in Missouri
Aircraft
#1$9.8M21.65%2025
Flood in Montana
Private Flood
#1$406,00023.43%2025
Ocean marine in Montana
Ocean Marine
#1$1.4M26.53%2025
Ocean marine in Nevada
Ocean Marine
#1$2.1M15.62%2025
General liability in Nevada
Products Liability
#1$5.9M11.77%2025
Ocean marine in New Hampshire
Ocean Marine
#1$2.7M11.91%2025
Ocean marine in New Jersey
Ocean Marine
#1$50.3M22.63%2025
Ocean marine in New Mexico
Ocean Marine
#1$532,00018.00%2025
Equipment breakdown in New Mexico
Boiler and Machinery
#1$1.5M11.75%2025
Earthquake in North Carolina
Earthquake
#1$2.7M13.23%2025
Ocean marine in North Dakota
Ocean Marine
#1$526,00018.28%2025
Ocean marine in Ohio
Ocean Marine
#1$20.3M19.53%2025
Ocean marine in Oklahoma
Ocean Marine
#1$4.3M20.31%2025
Ocean marine in Oregon
Ocean Marine
#1$12.0M22.15%2025
Flood in Pennsylvania
Private Flood
#1$5.2M15.58%2025
Ocean marine in Pennsylvania
Ocean Marine
#1$24.3M23.23%2025
Aircraft and aviation in Rhode Island
Aircraft
#1$6.0M45.10%2025
Earthquake in South Dakota
Earthquake
#1$154,00016.30%2025
Aircraft and aviation in South Dakota
Aircraft
#1$2.5M17.58%2025
Ocean marine in Texas
Ocean Marine
#1$76.0M16.33%2025
Earthquake in Texas
Earthquake
#1$9.0M14.48%2025
Credit in Utah
Credit
#1$4.6M15.52%2025
Aircraft and aviation in Vermont
Aircraft
#1$761,00017.91%2025
Aircraft and aviation in Virginia
Aircraft
#1$38.0M34.74%2025
Flood in West Virginia
Private Flood
#1$1.3M21.83%2025
Earthquake in West Virginia
Earthquake
#1$196,00010.56%2025
Aircraft and aviation in West Virginia
Aircraft
#1$1.8M27.66%2025
Ocean marine in Wisconsin
Ocean Marine
#1$27.7M38.45%2025
Flood in Wyoming
Private Flood
#1$220,00019.84%2025
Ocean marine in Wyoming
Ocean Marine
#1$14.9M89.51%2025
Commercial property (fire and allied lines) in Alabama
Fire
#2$25.0M5.54%2025
Crime (burglary and theft) in Alaska
Burglary and Theft
#2$291,00023.17%2025
Ocean marine in Arizona
Ocean Marine
#2$3.9M10.51%2025
Aircraft and aviation in Arizona
Aircraft
#2$12.3M13.45%2025
Equipment breakdown in Arizona
Boiler and Machinery
#2$3.5M9.79%2025
Crime (burglary and theft) in California
Burglary and Theft
#2$7.8M11.54%2025
Aircraft and aviation in Colorado
Aircraft
#2$12.8M14.18%2025
Flood in Connecticut
Private Flood
#2$3.0M15.49%2025

Showing the best 60 of 564 top-10 placements.

Bonds

Treasury-certified surety

On the U.S. Treasury's Circular 570 (updated August 01, 2026) with an underwriting limit of $584.7M per bond, licensed to write surety in 54 states and territories: AK, AL, AR, AZ, CA, CO, CT, DC, DE, FL, GA, GU, HI, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MP, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, PR, RI, SC, SD, TN, TX, UT, VA, VT, WA, WI, WV, WY.

Method and source

Each row comes from the named regulator's public company list on the date shown, joined by NAIC number. "Admitted" means licensed by the state and backed by its guaranty fund; "surplus lines" means eligible to take risks the admitted market declines, without rate or form approval or guaranty fund protection. Premium and rank come from state market share reports that list every company. This is a public-records directory, not a rating or recommendation; for the company's own filings use the NAIC's Consumer Information Source.

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