AI Earnings Predictions for Selective Insurance Group Inc. Depositary Shares each representing a 1/1000th interest in a share of 4.60% Non-Cumulative Preferred Stock Series B (SIGIP)

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Exhibit 99.1

Selective Reports Third Quarter 2026 Results

Net Income per Diluted Common Share of $2.11 and Non-GAAP Operating Income1 per

Diluted Common Share of $2.37;

Return on Common Equity ("ROE") of 15.1% and Non-GAAP Operating ROE1 of 16.9%

Quarterly Dividend Increased 12%; New $200 Million Share Repurchase Program Authorized

In the third quarter of 2026:

•The GAAP combined ratio was 96.8%, compared to 98.6% in the third quarter of 2025;

•Net premiums written ("NPW") decreased 7% from the third quarter of 2025;

•After-tax net investment income was $127 million, up 16% from the third quarter of 2025;

•Book value per common share was $55.02, down 5% from last quarter, primarily due to higher interest rates; and

•Adjusted book value per common share¹ was $62.00, up 2% from last quarter.

Short Hills, NJ - October 22, 2026 - Selective Insurance Group, Inc. (Nasdaq: SIGI) reported financial results for the third quarter ended September 30, 2026, with net income per diluted common share of $2.11 and non-GAAP operating income1 per diluted common share of $2.37. ROE was 15.1% and non-GAAP operating ROE1 was 16.9%.

“Operating ROE was 16.9% in the quarter, with excellent investment income and improved underwriting performance, led by a lower loss ratio. These results reflect our disciplined underwriting approach and continued progress to improve profitability,” said John J. Marchioni, Chairman, President and Chief Executive Officer.

For the quarter, Selective's combined ratio was 96.8%. Catastrophe losses were 5.4 points, and there was no prior year casualty reserve development at the segment or line of business level. NPW decreased 7% from a year ago driven by an 8% decrease in Standard Commercial Lines. Renewal pure price increases averaged 5.6%. Net investment income increased 16% from a year ago, to $127 million after-tax, generating 15.2 points of annualized ROE in the quarter.

“We remain focused on maintaining underwriting and pricing rigor in a competitive marketplace. This includes executing targeted pricing actions, improving the quality and mix of our portfolio, and remaining disciplined in our approach to new business growth. These actions have affected near-term premium growth, but we believe improving our portfolio's mix and profitability are the foundation for sustainable, profitable growth over time. We are increasingly leveraging data and technology to enhance underwriting and claims decision-making, increase operational effectiveness, and amplify the expertise of our employees. These investments strengthen our ability to consistently deliver value to customers, distribution partners, shareholders, and employees,” continued Mr. Marchioni.

“During the quarter, we returned 63% of after-tax net income through our regular dividend and $55 million of opportunistic share repurchases. Our strong capital position provides the flexibility to invest in attractive growth opportunities, maintain a competitive dividend, and return capital to shareholders. Based on the strength of our balance sheet and operating results, we increased our quarterly dividend by 12% to $0.48 per share, marking our thirteenth consecutive annual increase. The Board of Directors also approved a new $200 million share repurchase authorization, adding to the $53 million remaining on our existing authorization as of September 30, 2026. This reinforces our disciplined approach to capital management and commitment to long-term shareholder value,” concluded Mr. Marchioni.

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Operating Highlights

Consolidated Financial ResultsQuarter Ended September 30,ChangeYear-to-Date September 30, Change

$ and shares in millions, except per share data2026202520262025

Net premiums written$1,122.8 1,207.9 (7)%$3,569.0 3,737.0 (4)%

Net premiums earned1,180.2 1,204.7 (2)3,612.9 3,551.5 2

Net investment income earned160.5 138.7 16 453.0 387.3 17

Net realized and unrealized gains (losses), pre-tax(19.4)8.1 (341)(15.8)12.5 (227)

Total revenues1,326.3 1,360.1 (2)4,072.3 3,972.0 3

Net underwriting income (loss), after-tax29.5 13.2 124 65.6 47.3 39

Net investment income, after-tax127.3 110.0 16 359.6 307.0 17

Net income (loss) available to common stockholders 126.4 113.0 12 348.8 304.3 15

Non-GAAP operating income (loss)1

141.7 106.7 33 361.3 294.4 23

Combined ratio96.8 %98.6 (1.8)pts97.7 %98.3 (0.6)pts

Loss and loss expense ratio64.6 67.9 (3.3)66.2 67.2 (1.0)

Underwriting expense ratio32.1 30.6 1.5 31.4 31.0 0.4

Dividends to policyholders ratio0.1 0.1 — 0.1 0.1 —

Net catastrophe losses5.4 pts2.1 3.3 5.8 pts4.2 1.6

Non-catastrophe property losses and loss expenses13.1 14.1 (1.0)13.9 14.7 (0.8)

(Favorable) unfavorable prior year reserve development on casualty lines — 3.3 (3.3)— 2.5 (2.5)

Current year casualty loss costs 46.1 48.4 (2.3)46.5 45.8 0.7

Net income (loss) available to common stockholders per diluted common share$2.11 1.85 14 %$5.80 4.97 17 %

Non-GAAP opera

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Exhibit 99.1

Selective Reports Second Quarter 2026 Results

Net Income per Diluted Common Share of $2.11 and Non-GAAP Operating Income1 per

Diluted Common Share of $1.95;

Return on Common Equity ("ROE") of 14.8% and Non-GAAP Operating ROE1 of 13.7%

In the second quarter of 2026:

•Net premiums written ("NPW") decreased 5% from the second quarter of 2025;

•The GAAP combined ratio was 98.0%, compared to 100.2% in the second quarter of 2025;

•Commercial Lines renewal pure price increases averaged 6.5%, compared to 8.9% in the second quarter of 2025;

•After-tax net investment income was $119 million, up 18% from the second quarter of 2025;

•Book value per common share was $58.13, up 3% from last quarter; and

•Adjusted book value per common share¹ was $60.56, up 3% from last quarter.

Branchville, NJ - July 23, 2026 - Selective Insurance Group, Inc. (NASDAQ: SIGI) reported financial results for the second quarter ended June 30, 2026, with net income per diluted common share of $2.11 and non-GAAP operating income1 per diluted common share of $1.95. ROE was 14.8% and non-GAAP operating ROE1 was 13.7%.

For the quarter, Selective's combined ratio was 98.0%. Catastrophe losses were 5.6 points, and there was no net prior year casualty reserve development. NPW decreased 5% from a year ago driven by a 6% decrease in Standard Commercial Lines. Renewal pure price increases were 6.5%. Net investment income increased 18% from a year ago, to $119 million after-tax, generating 13.9 points of annualized ROE in the quarter.

“Our results reflect disciplined execution in an increasingly competitive environment. Operating ROE in the quarter was 13.7%, which marked our eighth consecutive quarter of double-digit operating returns. With our strong capital position and commitment to delivering long-term value, we returned 45% of after-tax net income through our regular dividend and $32 million of share repurchases. Even with this capital return, book value per share grew 3% in the quarter,” said John J. Marchioni, Chairman, President and Chief Executive Officer.

“Over the last two years, we have taken deliberate actions to improve the quality and long-term profitability of our underwriting portfolio. While those decisions contributed to lower premium in the quarter, they reflect the underwriting discipline that has long differentiated Selective and our commitment to pursuing growth where risk-adjusted returns are most attractive.”

“During the second quarter, we celebrated our 100th year in business and 50th year as a publicly traded company – milestones made possible by the talented employees, high-quality distribution partners, customers, and investors who have fueled our success. Having successfully navigated a century of market cycles, we remain confident in our ability to adapt, execute, and create long-term value. The actions we are taking to strengthen our portfolio reflect the same disciplined approach that has guided Selective’s success and position us well to deliver sustainable, profitable growth over the long-term,” concluded Mr. Marchioni.

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Operating Highlights

Consolidated Financial ResultsQuarter Ended June 30,ChangeYear-to-Date June 30, Change

$ and shares in millions, except per share data2026202520262025

Net premiums written$1,220.7 1,288.6 (5)%$2,446.2 2,529.1 (3)%

Net premiums earned1,215.5 1,188.1 2 2,432.7 2,346.8 4

Net investment income earned150.2 128.0 17 292.6 248.7 18

Net realized and unrealized gains (losses), pre-tax12.0 4.2 187 3.7 4.4 (17)

Total revenues1,387.0 1,326.7 5 2,746.0 2,611.9 5

Net underwriting income (loss), after-tax19.3 (1.9)(1,107)36.1 34.1 6

Net investment income, after-tax119.2 101.4 18 232.3 197.0 18

Net income (loss) available to common stockholders 127.1 83.6 52 222.5 191.2 16

Non-GAAP operating income (loss)1

117.6 80.3 46 219.6 187.8 17

Combined ratio98.0 %100.2 (2.2)pts98.1 %98.2 (0.1)pts

Loss and loss expense ratio67.2 69.3 (2.1)67.1 66.9 0.2

Underwriting expense ratio30.8 30.8 — 31.0 31.2 (0.2)

Dividends to policyholders ratio— 0.1 (0.1)— 0.1 (0.1)

Net catastrophe losses5.6 pts6.7 (1.1)5.9 pts5.3 0.6

Non-catastrophe property losses and loss expenses14.0 14.6 (0.6)14.3 15.0 (0.7)

(Favorable) unfavorable prior year reserve development on casualty lines — 3.8 (3.8)— 2.1 (2.1)

Current year casualty loss costs 47.6 44.2 3.4 46.9 44.5 2.4

Net income (loss) available to common stockholders per diluted common share$2.11 1.36 55 %$3.69 3.12 18 %

Non-GAAP operating income (loss) per diluted common share1

1.95 1.31 49 3.64 3.06 19

Weighted average diluted common shares60.261.3(2)60.361.3(2)

Book value per common share$58.13 52.09 12 $58.13 52.09 12

Adjusted book value per common share1 60.56 54.48 11 60.56 54.48 11

Overall Insurance Operations

In the second quarter, overall NPW decreased 5%, as we continued to implement rate and non-rate actions to enhance underwriting profitability. Average r

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Exhibit 99.1

Selective Reports First Quarter 2026 Results

Net Income per Diluted Common Share of $1.58 and Non-GAAP Operating Income1 per

Diluted Common Share of $1.69;

Return on Common Equity ("ROE") of 11.2% and Non-GAAP Operating ROE1 of 12.0%

In the first quarter of 2026:

•Net premiums written ("NPW") decreased 1% from the first quarter of 2025;

•The GAAP combined ratio was 98.3%, compared to 96.1% in the first quarter of 2025;

•Commercial Lines renewal pure price increases averaged 7.1%, compared to 9.1% in the first quarter of 2025;

•After-tax net investment income was $113 million, up 18% from the first quarter of 2025;

•Book value per common share was $56.58, down modestly from last quarter; and

•Adjusted book value per common share¹ was $58.94, up 2% from last quarter.

Branchville, NJ - April 22, 2026 - Selective Insurance Group, Inc. (NASDAQ: SIGI) reported financial results for the first quarter ended March 31, 2026, with net income per diluted common share of $1.58 and non-GAAP operating income1 per diluted common share of $1.69. ROE was 11.2% and non-GAAP operating ROE1 was 12.0%.

For the quarter, Selective's combined ratio was 98.3%. Catastrophe losses were 6.2 points, and there was no net prior year casualty reserve development. NPW decreased 1% from a year ago due to a 6% decrease in Standard Personal Lines and a 1% decrease in Standard Commercial Lines. Renewal pure price increases were 7.2%. Net investment income increased 18% from a year ago, to $113 million after-tax, generating 13.3 points of annualized ROE in the quarter.

“Our operating ROE of 12% this quarter was in-line with our long-term target and marked our seventh consecutive quarter of double-digit operating returns. We delivered a solid start to the year, which keeps us on track to achieve our 2026 guidance. In addition, we returned 57% of after-tax net income through our regular dividend and $30 million of share repurchases, reinforcing our commitment to delivering long-term value,” said John J. Marchioni, Chairman, President and Chief Executive Officer.

“Net premiums written decreased modestly in the quarter, reflecting a competitive environment and deliberate actions to further strengthen our performance. We view growth as an outcome of disciplined execution, and remain focused on delivering target underwriting profitability. This is supported by granular pricing, risk selection, and claims discipline.”

“With our talented employees, high-quality distribution partner relationships, and strong capital position, we are continuing to make investments to support diversifying, profitable growth across our business. We believe we are well positioned for the opportunities in front of us,” concluded Mr. Marchioni.

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Operating Highlights

Consolidated Financial ResultsQuarter Ended March 31,Change

$ and shares in millions, except per share data20262025

Net premiums written$1,225.5 1,240.4 (1)%

Net premiums earned1,217.2 1,158.8 5

Net investment income earned142.4 120.7 18

Net realized and unrealized gains (losses), pre-tax(8.3)0.2 (3,725)

Total revenues1,358.9 1,285.2 6

Net underwriting income (loss), after-tax16.8 36.1 (53)

Net investment income, after-tax113.1 95.6 18

Net income (loss) available to common stockholders 95.4 107.6 (11)

Non-GAAP operating income (loss)1

101.9 107.4 (5)

Combined ratio98.3 %96.1 2.2 pts

Loss and loss expense ratio67.0 64.4 2.6

Underwriting expense ratio31.2 31.6 (0.4)

Dividends to policyholders ratio0.1 0.1 —

Net catastrophe losses6.2 pts3.7 2.5

Non-catastrophe property losses and loss expenses14.6 15.4 (0.8)

(Favorable) unfavorable prior year reserve development on casualty lines — 0.4 (0.4)

Current year casualty loss costs 46.2 44.9 1.3

Net income (loss) available to common stockholders per diluted common share $1.58 1.76 (10)%

Non-GAAP operating income (loss) per diluted common share1

1.69 1.76 (4)

Weighted average diluted common shares60.561.3(1)

Book value per common share$56.58 50.33 12

Adjusted book value per common share1 58.94 53.39 10

Overall Insurance Operations

In the first quarter, overall NPW decreased 1%, as we implemented rate and non-rate actions to enhance underwriting profitability. Average renewal pure price increased 7.2%, down 3.1 points from a year ago. Our combined ratio was 98.3%, 2.2 points higher than a year ago, primarily due to higher catastrophe losses. There was no prior year casualty reserve development in the first quarter in any segment or line of business.

Overall, insurance segment performance generated 2.0 points of ROE in the first quarter of 2026, down 2.8 points from the first quarter of 2025.

Standard Commercial Lines Segment

In the first quarter, Standard Commercial Lines premiums, which account for 81% of total NPW, decreased 1% from a year ago driven by lower new business. Average renewal pure price increases were 7.1% and retention was 82% reflecting granula