Exhibit 99.1 Harleysville Group Reports Third Quarter 2004 Results HARLEYSVILLE, Pa., Oct. 28 /PRNewswire-FirstCall/ -- Harleysville Group Inc. (Nasdaq: HGIC) today reported diluted net income of $0.29 per share in the third quarter of 2004, compared to a diluted net loss of $1.16 per share in the third quarter of 2003. There were no realized investment gains in the third quarter of 2004, versus a realized loss of $0.01 per share in 2003. Harleysville Group's 2004 results reflect a charge of $0.13 per share from third quarter weather-related catastrophes, while Hurricane Isabel reduced earnings by $0.20 per share in the third quarter of 2003. The company's 2003 third quarter earnings were reduced by $1.19 per share after tax due to loss reserve adjustments. Diluted net income per share for the nine months ended September 30, 2004, was $1.17, compared to a diluted net loss of $0.93 in the first nine months of 2003. For the nine months, the company reported $0.28 per share in realized gains in 2004, compared to a realized loss of $0.02 per share in 2003. In 2003, the company's nine-month earnings were reduced by $1.62 per share after tax due to loss reserve adjustments. The company reported diluted operating income of $0.29 per share for the third quarter of 2004, compared to a $1.15 diluted operating loss per share in the third quarter of 2003. For the nine-month periods, the company reported diluted operating income of $0.89 per share in 2004 and a diluted operating loss of $0.91 in 2003. Operating income is a non-GAAP financial measure defined by the company as net income excluding after-tax realized gains and losses on investments. "Our third quarter results show that we continue to improve," commented Michael L. Browne, Harleysville Group's chief executive officer. "During the quarter, we again generated growth in our commercial lines business and continued to maintain solid retention levels - both of which affirm the strength of our agency base and our solid relationships with our agents. At the same time, we continue to maintain a solid capital base and a strong balance sheet, a modest debt-to-capital ratio of 17 percent, a high-quality investment portfolio and a premium-to-surplus ratio of 1.7:1 - all of which are key components of our strong financial position. "While hurricanes did impact us this quarter, the effect was relatively minimal compared to what has been reported by some of our competitors in the industry because we've worked hard over the past decade to manage our windstorm exposures to acceptable levels," Browne continued. "We sympathize with our policyholders who suffered losses from these storms, and I'm proud that our claims professionals - working in tandem with our independent agency partners - have rallied to their assistance and are delivering the prompt and fair claims service our customers have come to expect from Harleysville." The company's third quarter results reflect claims costs of $6.1 million pretax, or $0.13 per share after tax, from all weather-related catastrophes - including the four hurricanes that hit the southeastern United States during the third quarter, but driven predominantly by claims associated with Hurricanes Ivan and Jeanne in several Mid-Atlantic states - compared to $10.5 million pretax, or $0.23 per share after tax, in the third quarter of 2003. In the first nine months of 2004, Harleysville Group's property catastrophe losses were $10.0 million pretax, or $0.22 per share after tax. That compares to property catastrophe losses of $17.7 million pretax, or $0.38 per share after tax, for the first nine months of 2003. Harleysville Group's overall statutory combined ratio* was 106.6 percent in the third quarter of 2004, compared to 137.2 percent in the third quarter of 2003. For the nine months, the statutory combined ratio was 106.4 percent in 2004, versus 119.4 percent in 2003. The 2003 combined ratios reflect the previously mentioned loss reserve adjustments. Third quarter net written premiums were $209.9 million in 2004, compared to $208.1 million in 2003. Net written premiums through nine months were $639.0 million in 2004 and $645.9 million in 2003. Third quarter pretax investment income declined 1 percent to $21.5 million, while nine-month pretax investment income was essentially unchanged at $64.6 million. After-tax investment income was down 1 percent in the third quarter to $16.6 million, but was virtually unchanged at $50.0 million during the nine-month period. Operating cash flow for the nine months was $70.2 million. Commercial lines -- Net written premiums in commercial lines increased 5 percent in the third quarter of 2004 to $166.7 million. For the nine months, net written premiums were up 2 percent to $514.9 million. The commercial lines statutory combined ratio was 108.6 percent in the third quarter of 2004, versus 140.1 percent in the third quarter of 2003. For the nine months, the statutory combined ratio was 106.7 percent in 2004, compared to 119.0 percent in 2003. The combined ratios in both 2003 periods were impacted by the previously mentioned loss reserve adjustments. Personal lines -- Harleysville Group's personal lines statutory combined ratio was 99.0 percent in the third quarter of 2004, versus 127.3 percent during the third quarter of 2003. For the nine months, the statutory combined ratio was 105.3 percent in 2004, compared to 120.7 percent in 2003. In 2003, weather-related losses and abnormally high large loss activity in the homeowners line also contributed to the higher statutory combined ratio. Net written premiums decreased 12 percent to $43.2 million in the third quarter of 2004, and were down 13 percent to $124.2 million through nine months. Webcast -- The company will host a live Webcast today, Thursday, October 28, 2004, at 9:00 a.m. (ET) to discuss its third quarter results. The Webcast will be available from the Investors section of the company's Web site (http://www.harleysvillegroup.com) until October 28, 2005. GAAP and non-GAAP financial measures -- The company uses a non-GAAP financial measure called "operating income" that management believes is useful to investors because it illustrates the performance of normal, ongoing operations, which is important in understanding and evaluating the company's financial condition and results of operations. While this measure is utilized by investors to evaluate performance, it is not a substitute for the U.S. GAAP financial measure of net income. Therefore, a reconciliation of this non-GAAP financial measure to the U.S. GAAP financial measure of net income is provided following the Consolidated Statements of Income contained in this release. Management also uses operating income for goal setting, determining employee and senior management compensation, and evaluating performance. Corporate profile -- Harleysville Insurance is a leading regional provider of insurance products and services for small and mid-sized businesses, as well as for individuals, and ranks among the top 60 U.S. property/casualty insurance groups based on net written premiums. Harleysville Mutual Insurance Company owns 57 percent of Harleysville Group Inc. (Nasdaq: HGIC), a publicly traded holding company for nine regional property/casualty insurance companies collectively rated A- (Excellent) by A.M. Best Company. Harleysville Insurance, which distributes its products exclusively through independent insurance agencies, currently operates in 32 eastern and Midwestern states. Further information can be found on the company's Web site at http://www.harleysvillegroup.com. * "Statutory combined ratio" is a non-GAAP measure of underwriting profitability and is based on numbers determined under statutory accounting practices as filed with state insurance regulators. It is the sum of the ratio of losses to premiums earned plus the ratio of underwriting expenses to premiums written. A ratio of less than 100 percent indicates underwriting profitability. Certain of the statements contained herein (other than statements of historical facts) are forward-looking statements. Such forward-looking statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995 and include estimates and assumptions related to economic, competitive and legislative developments. These forward- looking statements are subject to change and uncertainty that are, in many instances, beyond the company's control and have been made based upon management's expectations and beliefs concerning future developments and their potential effect on Harleysville Group Inc. There can be no assurance that future developments will be in accordance with management's expectations so that the effect of future developments on Harleysville Group will be those anticipated by management. Actual financial results including premium growth and underwriting results could differ materially from those anticipated by Harleysville Group depending on the outcome of certain factors, which may include changes in property and casualty loss trends and reserves; catastrophe losses; the insurance product pricing environment; changes in applicable law; government regulation and changes therein that may impede the ability to charge adequate rates; changes in accounting principles; performance of the financial markets; fluctuations in interest rates; availability and price of reinsurance; and the status of the labor markets in which the company operates. Harleysville Group Inc. and Subsidiaries Quarter ended Nine months ended FINANCIAL HIGHLIGHTS September 30 September 30 (in thousands, except per share data) 2004 2003 2004 2003 OPERATING RESULTS Diluted earnings per common share: Operating income (loss) * $0.29 ($1.15) $0.89 ($0.91) Realized gains (losses), net of tax (0.01) 0.28 (0.02) Net income (loss) $0.29 ($1.16) $1.17 ($0.93) Cash dividends per common share $0.17 $0.17 $0.51 $0.50 FINANCIAL CONDITION September 30, 2004 December 31, 2003 Assets $2,638,728 $2,680,389 Shareholders' equity $583,619 $572,747 Per common share $19.38 $19.16 Quarter ended Nine months ended CONSOLIDATED STATEMENTS OF September 30 September 30 INCOME (LOSS) (in thousands, except per share data) 2004 2003 2004 2003 REVENUES: Premiums earned $212,641 $209,177 $627,241 $611,761 Investment income, net of investment expense 21,499 21,638 64,578 64,734 Realized investment gains (losses) 104 (531) 12,651 (897) Other income 4,024 3,838 12,259 12,431 Total revenues 238,268 234,122 716,729 688,029 LOSSES AND EXPENSES: Losses and loss settlement expenses 153,944 217,456 453,765 528,641 Amortization of deferred policy acquisition costs 52,150 51,838 153,536 150,053 Other underwriting expenses 18,154 18,214 57,518 54,892 Interest expense 1,587 2,609 4,730 5,396 Other expenses 2,764 1,596 5,449 3,983 Total expenses 228,599 291,713 674,998 742,965 Income (loss) before income taxes 9,669 (57,591) 41,731 (54,936) Income taxes (benefit) 789 (22,937) 6,630 (27,110) Net income (loss) $8,880 ($34,654) $35,101 ($27,826) Weighted average number of shares outstanding: Basic 30,062,573 29,986,285 29,994,621 30,016,861 Diluted 30,153,074 29,986,285 30,090,932 30,016,861 Per common share: Basic earnings (loss) $0.30 ($1.16) $1.17 ($0.93) Diluted earnings (loss) $0.29 ($1.16) $1.17 ($0.93) RECONCILIATION TO OPERATING INCOME (LOSS): Net income (loss) $8,880 ($34,654) $35,101 ($27,826) Less realized investment gains (losses), net of taxes 68 (345) 8,223 (583) Operating income (loss) $8,812 ($34,309) $26,878 ($27,243) These financial figures are unaudited. * Operating income is a non-GAAP financial measure defined by the company as net income excluding after-tax realized gains and losses on investments. Harleysville Group Inc. and Subsidiaries CONSOLIDATED BALANCE SHEETS (in thousands, except share data) September 30, 2004* December 31, 2003 ASSETS Investments: Fixed maturities: Held to maturity, at amortized cost (fair value $532,494 $510,841 $439,613 and $467,485) Available for sale, at fair value (amortized cost $1,118,146 1,167,413 1,246,019 and $1,183,158) Equity securities, at fair value (cost $110,033 and $97,189) 141,497 137,590 Short-term investments, at cost, which approximates fair value 94,212 31,411 Total investments 1,913,963 1,854,633 Cash 1,037 13,430 Premiums in course of collection 143,166 140,674 Reinsurance receivable 176,052 164,841 Accrued investment income 21,442 23,086 Deferred policy acquisition costs 103,376 99,033 Prepaid reinsurance premiums 32,442 30,899 Property and equipment, net 21,291 23,824 Deferred income taxes 52,424 43,020 Securities lending collateral 120,888 221,454 Due from affiliate 6,833 Other assets 45,814 65,495 Total assets $2,638,728 $2,680,389 LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities: Unpaid losses and loss settlement expenses $1,280,820 $1,219,977 Unearned premiums 451,219 437,883 Accounts payable and accrued expenses 82,557 91,999 Securities lending obligation 120,888 221,454 Debt 119,625 120,145 Due to affiliate 16,184 Total liabilities 2,055,109 2,107,642 Shareholders' equity: Preferred stock, $1 par value; authorized 1,000,000 shares; none issued Common stock, $1 par value, authorized 80,000,000 shares; issued 31,510,885 and 31,298,532 shares; outstanding 30,112,976 and 29,900,623 shares 31,511 31,299 Additional paid-in capital 160,358 156,997 Accumulated other comprehensive income 45,805 60,450 Retained earnings 370,632 350,844 Deferred compensation (200) (2,356) Treasury stock, at cost, 1,397,909 shares (24,487) (24,487) Total shareholders' equity 583,619 572,747 Total liabilities and shareholders' equity $2,638,728 $2,680,389 * These financial figures are unaudited. Harleysville Group Inc. and Subsidiaries SUPPLEMENTARY FINANCIAL ANALYSTS' DATA Quarter ended Nine months ended September 30 September 30 (dollars in thousands) 2004 2003 2004 2003 Net premiums written* $209,914 $208,096 $639,035 $645,943 Statutory surplus * $498,093 $501,331 Pretax investment income $21,499 $21,638 $64,578 $64,734 Related federal income taxes 4,926 4,939 14,615 14,912 After-tax investment income $16,573 $16,699 $49,963 $49,822 SEGMENT INFORMATION Quarter ended Nine months ended September 30 September 30 (dollars in thousands) 2004 2003 2004 2003 Revenues: Premiums earned: Commercial lines $169,680 $161,412 $495,791 $464,279 Personal lines 42,961 47,765 131,450 147,482 Total premiums earned 212,641 209,177 627,241 611,761 Net investment income 21,499 21,638 64,578 64,734 Realized investment gains (losses) 104 (531) 12,651 (897) Other 4,024 3,838 12,259 12,431 Total revenues $238,268 $234,122 $716,729 $688,029 Income (loss) before income taxes: Underwriting gain (loss): Commercial lines ($13,517) ($63,953) ($39,523) ($100,726) Personal lines 344 (13,439) (4,506) (29,181) SAP underwriting loss (13,173) (77,392) (44,029) (129,907) GAAP adjustments 1,566 (939) 6,451 8,082 GAAP underwriting loss (11,607) (78,331) (37,578) (121,825) Net investment income 21,499 21,638 64,578 64,734 Realized investment gains (losses) 104 (531) 12,651 (897) Other (327) (367) 2,080 3,052 Income (loss) before income taxes $9,669 ($57,591) $41,731 ($54,936) Income taxes on net investment income $4,926 $4,939 $14,615 $14,912 Income tax on remaining loss (4,137) (27,876) (7,985) (42,022) Total income taxes (benefit) $789 ($22,937) $6,630 ($27,110) Effective tax rate on: Net investment income 22.9% 22.8% 22.6% 23.0% Net income 8.2% 39.8% 15.9% 49.3% These financial figures are unaudited. * Statutory data is prepared in accordance with statutory accounting rules as defined by the National Association of Insurance Commissioners' Accounting Practices and Procedures Manual and therefore is not reconciled to GAAP. Harleysville Group Inc. and Subsidiaries STATUTORY DATA BY LINE OF BUSINESS* Quarter ended Nine months ended September 30 September 30 (dollars in thousands) 2004 2003 2004 2003 Net premiums written: Commercial: Automobile $55,119 $56,614 $174,247 $170,898 Workers' compensation 23,817 25,068 74,729 85,379 Commercial multi-peril 70,557 60,286 215,560 194,042 Other commercial 17,181 17,113 50,343 52,192 Total commercial $166,674 $159,081 $514,879 $502,511 Personal: Automobile $23,993 $28,133 $70,653 $86,728 Homeowners 16,910 18,578 46,392 50,045 Other personal 2,337 2,304 7,111 6,659 Total personal $43,240 $49,015 $124,156 $143,432 Total personal and commercial $209,914 $208,096 $639,035 $645,943 Combined ratios: Commercial: Automobile 103.8% 131.2% 103.8% 107.8% Workers' compensation 131.2% 203.1% 125.4% 172.4% Commercial multi-peril 105.8% 134.6% 105.4% 113.3% Other commercial 103.4% 84.7% 93.5% 82.4% Total commercial 108.6% 140.1% 106.7% 119.0% Personal: Automobile 113.0% 129.2% 114.0% 120.7% Homeowners 78.3% 129.8% 91.2% 122.2% Other personal 88.0% 85.5% 103.8% 107.2% Total personal 99.0% 127.3% 105.3% 120.7% Total personal and commercial 106.6% 137.2% 106.4% 119.4% Losses paid $128,077 $123,677 $404,792 $378,048 Net catastrophe losses incurred $6,091 $10,469 $9,977 $17,704 These financial figures are unaudited. * Statutory data is prepared in accordance with statutory accounting rules as defined by the National Association of Insurance Commissioners' Accounting Practices and Procedures Manual and therefore is not reconciled to GAAP. SOURCE Harleysville Group Inc. -0- 10/28/2004 /CONTACT: Mark Cummins (Investors), +1-215-256-5025, mcummins@harleysvillegroup.com; or Randy Buckwalter (Media), +1-215-256-5288, rbuckwalter@harleysvillegroup.com, both of Harleysville Group/ /Web site: http://www.harleysvillegroup.com / (HGIC) CO: Harleysville Group Inc. ST: Pennsylvania IN: INS FIN SU: ERN MAV CCA