Exhibit 99.1 Harleysville Group Reports Third Quarter Results HARLEYSVILLE, Pa., Oct. 24 /PRNewswire-FirstCall/ -- Harleysville Group Inc. (Nasdaq: HGIC) today reported a diluted net loss of $1.16 per share in the third quarter of 2003, reflecting the previously announced loss reserve increases in several business lines and the cost of claims resulting from Hurricane Isabel. The net loss includes net realized after-tax investment losses of $0.01 per share. The company had diluted net income of $0.50 per share in the third quarter of 2002. For the nine months, the company reported a diluted net loss per share of $0.93, compared to diluted net income per share of $0.95 in 2002. The 2003 result includes realized investment losses of $0.02 per share, compared to $0.44 per share of realized losses in 2002. The company reported a diluted operating loss of $1.15 per share for the third quarter ended September 30, 2003, compared to diluted operating income of $0.50 per share in the same period of 2002. For the nine months ended September 30, 2003 the diluted operating loss was $0.91 per share, compared to diluted operating income of $1.39 per share in the same period of 2002. Operating income is a non-GAAP financial measure defined by the company as net income excluding after-tax realized gains and losses on investments. "As I stated in our preliminary earnings announcement last week, our third quarter results are not acceptable," commented Michael L. Browne, Harleysville Group's chairman of the board. "We have moved quickly to bolster our reserves to assure the continued strength and integrity of our balance sheet, and we are taking the steps necessary to improve operating results." The company's third quarter and nine-month results were reduced by the previously announced addition of $55 million pretax, or $1.19 per share after tax, to the company's loss and loss adjustment reserves for prior accident years, specifically in its workers compensation ($17 million), commercial automobile liability ($19 million), commercial multi-peril liability ($14 million) and personal automobile liability ($5 million) lines of business. Harleysville Group's end-of-the-quarter reserve analysis showed higher-than- expected development in the casualty lines of business in accident years prior to 2003, which caused the company to make the reserve adjustment. Of the reserve development, 87 percent relates to the 1998 to 2002 accident years. Harleysville Group's nine-month earnings were reduced by an additional $20 million pretax, or $0.43 per share after tax, due to a first quarter workers compensation reserve adjustment. In light of the higher-than-expected development in prior accident years, the company raised its loss estimates for the 2003 accident year, which also impacted the company's third quarter and nine-month results. The third quarter results also reflect claims costs of $9.4 million pretax, or $0.20 per share after tax, from Hurricane Isabel in September. In the first nine months of 2003, Harleysville Group's property catastrophe losses were $17.7 million pretax, or $0.38 per share after tax. That compares to property catastrophe losses of $3.9 million pretax, or $0.08 per share after tax, for the first nine months of 2002. Harleysville Group's overall statutory combined ratio* was 137.2 percent in the third quarter of 2003, compared to 101.7 percent in the third quarter of 2002. For the nine months, the statutory combined ratio was 119.4 percent in 2003, versus 101.9 percent in 2002. Reserve development added 26.4 points and 12.5 points to the 2003 third quarter and nine-month statutory combined ratios, respectively. In addition, property catastrophe losses added 5.0 points and 2.9 points to the 2003 third quarter and nine-month statutory combined ratios, respectively. In 2002, catastrophe losses amounted to 0.3 points and 0.7 points for the third quarter and nine months, respectively. Third quarter net written premiums rose 2 percent to $208.1 million in 2003, while net written premiums through nine months increased by 6 percent to $645.9 million in 2003. Pretax investment income was virtually unchanged in the third quarter and through nine months at $21.6 million and $64.7 million, respectively. After- tax investment income rose 1 percent in both the third quarter and the year to date at $16.7 million and $49.8 million, respectively. Operating cash flow for the nine months was $113.3 million, or $39.0 million higher than the prior year's nine months. Commercial lines Net written premiums climbed 5 percent to $159.1 million in the third quarter of 2003 and 10 percent to $502.5 million during the first nine months of this year. The increase in written premiums is primarily due to higher pricing. The commercial lines statutory combined ratio was 140.1 percent in the third quarter of 2003, versus 100.0 percent in the third quarter of 2002. For the nine months, the statutory combined ratio was 119.0 percent in 2003, compared to 99.9 percent in 2002. In 2003, the third quarter reserve development added 31.2 points to the quarter's commercial lines statutory combined ratio, while reserve development added 15.1 points to the nine-month commercial lines statutory combined ratio. Personal lines Harleysville Group's personal lines statutory combined ratio was 127.3 percent in the third quarter of 2003, versus 106.4 percent during the third quarter of 2002. For the nine months, the statutory combined ratio was 120.7 percent in 2003, compared to 106.7 percent in 2002. In 2003, reserve development added 9.7 points to the third quarter personal lines statutory combined ratio and 4.7 points to the nine-month personal lines statutory combined ratio. The higher catastrophe losses also contributed to the higher statutory combined ratio. Net written premiums declined 9 percent to $49.0 million in the third quarter of 2003 and were down 5 percent to $143.4 million during the first nine months of this year. Outlook "Our strong balance sheet, productive partnerships with our agents and focused strategy position us as one of the country's premier regional insurance companies and enable us to succeed in the marketplace," stated M. Lee Patkus, Harleysville Group's president and chief operating officer. "We see plenty of opportunity in front of us. We're confident that with better and more consistent execution we can produce the superior results our shareholders expect." Webcast The company will host a live Webcast today, Friday, October 24, 2003, 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 (www.harleysvillegroup.com). The presentation will be archived on the Web site until October 24, 2004. 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, "Good people to know," is a premier provider of insurance products and services for small businesses and individuals, and ranks among the top 60 U.S. property/casualty insurance groups based on total net written premium. Harleysville Group Inc. (Nasdaq: HGIC) is 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 through independent insurance agents, operates in 32 Eastern and Midwestern states. Further information can be found on the company's Web site. * "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 Nine months Quarter ended ended FINANCIAL HIGHLIGHTS September 30 September 30 (in thousands, except per share data) 2003 2002 2003 2002 OPERATING RESULTS Diluted earnings (loss) per common share: Operating income (loss)* ($1.15) $0.50 ($0.91) $1.39 Realized gains (losses), net of tax (0.01) 0.00 (0.02) (0.44) Net income (loss) ($1.16) $0.50 ($0.93) $0.95 Cash dividends per common share $0.17 $0.165 $0.50 $0.465 FINANCIAL CONDITION September 30, 2003 December 31, 2002 Assets $2,721,515 $2,311,524 Shareholders' equity $598,490 $632,112 Per common share $19.96 $21.13 Nine months Quarter ended ended CONSOLIDATED STATEMENTS OF September 30 September 30 INCOME (LOSS) (in thousands, except per share data) 2003 2002 2003 2002 REVENUES: Premiums earned $209,177 $196,524 $611,761 $566,737 Investment income, net of investment expense 21,638 21,739 64,734 64,747 Realized investment gains (losses) (531) 57 (897) (20,448) Other income 3,838 3,967 12,431 11,610 Total revenues 234,122 222,287 688,029 622,646 LOSSES AND EXPENSES: Losses and loss settlement expenses 217,456 134,708 528,641 389,789 Amortization of deferred policy acquisition costs 51,838 47,375 150,053 137,570 Other underwriting expenses 18,214 17,878 54,892 54,295 Interest expense 2,609 1,423 5,396 4,278 Other expenses 1,596 1,178 3,983 3,270 Total expenses 291,713 202,562 742,965 589,202 Income (loss) before income taxes (57,591) 19,725 (54,936) 33,444 Income taxes (benefit) (22,937) 4,509 (27,110) 4,592 Net income (loss) ($34,654) $15,216 ($27,826) $28,852 Weighted average number of shares outstanding: Basic 29,986,285 29,790,105 30,016,861 29,647,135 Diluted 29,986,285 30,384,932 30,016,861 30,257,720 Per common share: Basic earnings (loss) ($1.16) $0.51 ($0.93) $0.97 Diluted earnings (loss) ($1.16) $0.50 ($0.93) $0.95 RECONCILIATION TO OPERATING INCOME (LOSS): Net income (loss) ($34,654) $15,216 ($27,826) $28,852 Less realized investment gains (losses), net of taxes (345) 21 (583) (13,307) Operating income (loss) ($34,309) $15,195 ($27,243) $42,159 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, 2003* December 31, 2002 ASSETS Investments: Fixed maturities: Held to maturity, at amortized cost (fair value $411,851 $380,586 $385,162 and $416,942) Available for sale, at fair value (amortized cost $1,188,730 1,261,745 1,124,869 and $1,051,880) Equity securities, at fair value (cost $96,348 and $96,849) 122,472 107,177 Short-term investments, at cost, which approximates fair value 154,097 89,692 Total investments 1,918,900 1,706,900 Cash 4,528 2,944 Premiums in course of collection 140,335 138,905 Reinsurance receivable 152,277 75,488 Accrued investment income 21,419 21,552 Deferred policy acquisition costs 102,934 94,896 Prepaid reinsurance premiums 21,010 19,421 Property and equipment, net 24,642 27,556 Deferred income taxes 39,072 25,784 Securities lending collateral 230,348 139,215 Due from affiliate 7,909 10,709 Other assets 58,141 48,154 Total assets $2,721,515 $2,311,524 LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities: Unpaid losses and loss settlement expenses $1,154,348 $928,335 Unearned premiums 442,049 406,277 Accounts payable and accrued expenses 101,135 109,965 Securities lending obligation 230,348 139,215 Debt 195,145 95,620 Total liabilities 2,123,025 1,679,412 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 31,318,312 and 30,917,575 shares; outstanding 29,985,039 and 29,917,575 shares 31,318 30,918 Additional paid-in capital 157,487 149,091 Accumulated other comprehensive income 59,370 49,086 Retained earnings 375,733 418,582 Deferred compensation (2,356) Treasury stock, at cost, 1,333,273 and 1,000,000 shares (23,062) (15,565) Total shareholders' equity 598,490 632,112 Total liabilities and shareholders' equity $2,721,515 $2,311,524 * 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) 2003 2002 2003 2002 Net premiums written* $208,096 $204,646 $645,943 $606,728 Statutory surplus * $501,331 $519,039 Pretax investment income $21,638 $21,739 $64,734 $64,747 Related federal income taxes 4,939 5,239 14,912 15,606 After-tax investment income $16,699 $16,500 $49,822 $49,141 SEGMENT INFORMATION Quarter ended Nine months ended September 30 September 30 (dollars in thousands) 2003 2002 2003 2002 Revenues: Premiums earned: Commercial lines $161,412 $143,725 $464,279 $406,414 Personal lines 47,765 52,799 147,482 160,323 Total premiums earned 209,177 196,524 611,761 566,737 Net investment income 21,638 21,739 64,734 64,747 Realized investment gains (losses) (531) 57 (897) (20,448) Other 3,838 3,967 12,431 11,610 Total revenues $234,122 $222,287 $688,029 $622,646 Income (loss) before income taxes: Underwriting loss: Commercial lines ($63,953) ($2,459) ($100,726) ($15,612) Personal lines (13,439) (3,628) (29,181) (8,001) SAP underwriting loss (77,392) (6,087) (129,907) (23,613) GAAP adjustments (939) 2,650 8,082 8,696 GAAP underwriting loss (78,331) (3,437) (121,825) (14,917) Net investment income 21,638 21,739 64,734 64,747 Realized investment gains (losses) (531) 57 (897) (20,448) Other (367) 1,366 3,052 4,062 Income (loss) before income taxes ($57,591) $19,725 ($54,936) $33,444 Income taxes on net investment income $4,939 $5,239 $14,912 $15,606 Income tax on remaining loss (27,876) (730) (42,022) (11,014) Total income taxes (benefit) ($22,937) $4,509 ($27,110) $4,592 Effective tax rate on: Net investment income 22.8% 24.1% 23.0% 24.1% Net income 39.8% 22.9% 49.3% 13.7% 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) 2003 2002 2003 2002 Net premiums written: Commercial: Automobile $56,614 $52,683 $170,898 $151,792 Workers' compensation 25,068 28,290 85,379 90,819 Commercial multi-peril 60,286 55,485 194,042 169,293 Other commercial 17,113 14,553 52,192 43,354 Total commercial $159,081 $151,011 $502,511 $455,258 Personal: Automobile $28,133 $32,494 $86,728 $93,806 Homeowners 18,578 19,082 50,045 51,197 Other personal 2,304 2,059 6,659 6,467 Total personal $49,015 $53,635 $143,432 $151,470 Total personal and commercial $208,096 $204,646 $645,943 $606,728 Combined ratios: Commercial: Automobile 131.2% 93.2% 107.8% 92.8% Workers' compensation 203.1% 130.9% 172.4% 126.1% Commercial multi-peril 134.6% 91.6% 113.3% 94.4% Other commercial 84.7% 89.7% 82.4% 85.8% Total commercial 140.1% 100.0% 119.0% 99.9% Personal: Automobile 129.2% 111.4% 120.7% 113.8% Homeowners 129.8% 100.0% 122.2% 97.2% Other personal 85.5% 79.2% 107.2% 74.0% Total personal 127.3% 106.4% 120.7% 106.7% Total personal and commercial 137.2% 101.7% 119.4% 101.9% Losses paid $123,677 $111,955 $378,048 $350,564 Net catastrophe losses incurred $10,469 $494 $17,704 $3,867 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.