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 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

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Exhibit 99.1

Selective Reports Fourth Quarter and Year-End 2025 Results

Net Income per Diluted Common Share of $2.52 and Non-GAAP Operating Income1 per

Diluted Common Share of $2.57;

Return on Common Equity ("ROE") of 18.3% and Non-GAAP Operating ROE1 of 18.7%

Full Year 2025 ROE of 14.4% and Non-GAAP Operating ROE1 of 14.2%

In the fourth quarter of 2025:

•Net premiums written ("NPW") increased 4% from the fourth quarter of 2024;

•The GAAP combined ratio was 93.8%, compared to 98.5% in the fourth quarter of 2024;

•Commercial Lines renewal pure price increases averaged 7.5%, compared to 8.8% in the fourth quarter of 2024;

•After-tax net investment income was $114 million, up 17% from the fourth quarter of 2024;

•Book value per common share was $56.74, up 4% from last quarter; and

•Adjusted book value per common share¹ was $57.91, up 4% from last quarter.

Branchville, NJ - January 29, 2026 - Selective Insurance Group, Inc. (NASDAQ: SIGI) reported financial results for the fourth quarter ended December 31, 2025, with net income per diluted common share of $2.52 and non-GAAP operating income1 per diluted common share of $2.57. ROE was 18.3% and non-GAAP operating ROE1 was 18.7%.

For the quarter, Selective's combined ratio was 93.8%. Catastrophe losses were 1.7 points, and there was no net prior year casualty reserve development. NPW grew 4% from a year ago, driven by renewal pure price increases of 8.3%. Net investment income increased 17% from a year ago, to $114 million after-tax, generating 13.6 points of annualized ROE in the quarter.

For the year, Selective reported net income per diluted common share of $7.49 and non-GAAP operating income1 per diluted common share of $7.38. The 2025 combined ratio was 97.2%, an improvement of almost six points, driven by the loss and loss expense ratio. NPW increased 5% driven by renewal pure price increases of 9.5%. After-tax net investment income was $421.2 million, up 16% from a year ago, and generated 13.3 points of ROE.

“We are well-positioned to build on recent momentum. We delivered a double-digit operating ROE of 14.2% in 2025, reflecting the strength of our disciplined execution and resilience of our business model. This exceeds our ten-year average operating ROE of 12.1%. Our performance drove an 18% increase in book value per share in 2025, and we returned $182 million to common stockholders through regular dividends and opportunistic share repurchases,” said John J. Marchioni, Chairman, President and Chief Executive Officer.

“We executed key strategic initiatives across our business, delivering excellent growth and underwriting profitability in Excess and Surplus Lines. In Personal Lines, we improved our underwriting results as we continue to shift toward the mass affluent market. We also are executing targeted rate and underwriting actions in Standard Commercial Lines to achieve future profitability improvements.”

“As Selective celebrates its 100th anniversary in 2026, we are building on a century of strength and resilience while maintaining a clear focus on the future. Our efforts include advancing strategic priorities that enhance our operational fundamentals in risk selection, individual policy pricing, and claims outcomes; diversifying revenue and income within and across our three insurance segments; and expanding our use of data analytics and technology, including artificial intelligence, to enhance efficiency and performance. We remain committed to making strategic investments that fuel continued growth, innovation, and performance excellence,” concluded Mr. Marchioni.

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Operating Highlights

Consolidated Financial ResultsQuarter Ended December 31,ChangeYear-to-Date December 31, Change

$ and shares in millions, except per share data2025202420252024

Net premiums written$1,129.5 1,089.6 4 %$4,866.5 4,630.0 5 %

Net premiums earned1,216.7 1,133.0 7 4,768.2 4,376.4 9

Net investment income earned143.8 122.8 17 531.2 457.1 16

Net realized and unrealized gains (losses), pre-tax(4.1)(8.0)(48)8.3 (2.9)(382)

Total revenues1,364.9 1,256.4 9 5,336.9 4,861.7 10

Net underwriting income (loss), after-tax60.0 13.3 352 107.4 (104.7)(202)

Net investment income, after-tax114.2 97.3 17 421.2 362.6 16

Net income (loss) available to common stockholders 152.9 93.2 64 457.2 197.8 131

Non-GAAP operating income (loss)1

156.2 99.6 57 450.6 200.1 125

Combined ratio93.8 %98.5 (4.7)pts97.2 %103.0 (5.8)pts

Loss and loss expense ratio63.2 67.8 (4.6)66.3 72.3 (6.0)

Underwriting expense ratio30.5 30.6 (0.1)30.8 30.6 0.2

Dividends to policyholders ratio0.1 0.1 — 0.1 0.1 —

Net catastrophe losses1.7 pts(0.9)2.6 3.5 pts6.5 (3.0)

Non-catastrophe property losses and loss expenses13.1 15.7 (2.6)14.3 15.6 (1.3)

(Favorable) unfavorable prior year reserve development on casualty lines — 8.8 (8.8)1.9 7.1 (5.2)

Current year casualty loss costs 48.4 44.2 4.2 46.6 43.1 3.5

Net income (loss) available to co