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Shareholders' Equity | 12 Months Ended
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Dec. 31, 2025
Stockholders' Equity Note [Abstract] |
Shareholders' Equity | Authorized and Issued The authorized share capital of Arch Capital consists of 1.8 billion Common Shares, par value of $0.0011 per share, and 50 million Preferred Shares, par value of $0.01 per share. Common Shares The following table presents a roll-forward of changes in Arch Capital’s issued and outstanding Common Shares:
| Year Ended December 31,
| 2025 |  | 2024 |  | 2023
Common Shares: |  |  |  |  |
Shares issued and outstanding, beginning of year | 595.6 |  |  | 591.9 |  |  | 588.3 |
Shares issued (1) | 3.1 |  |  | 2.5 |  |  | 2.8 |
Restricted shares issued, net of cancellations | 1.1 |  |  | 1.2 |  |  | 0.8 |
Shares issued and outstanding, end of year | 599.8 |  |  | 595.6 |  |  | 591.9 |
Common shares in treasury, end of year | (240.8) |  |  | (219.2) |  |  | (218.5) |
Shares issued and outstanding, end of year | 359.0 |  |  | 376.4 |  |  | 373.4 |
(1) Includes shares issued from the exercise of stock options and stock appreciation rights, the vesting of restricted share units and shares issued from the employee share purchase plan. Special Cash Dividend In 2024, the Board of Directors of Arch Capital (the “Board”) has declared and paid a special cash dividend of $1.9 billion to common shareholders, representing $5.00 per outstanding common share. Share Repurchase Program The Board has authorized the investment in Arch Capital’s common shares through a share repurchase program. At December 31, 2025, $1.1 billion of share repurchases were available under the program. Repurchases under the program may be effected from time to time in open market. The timing and amount of the repurchase transactions under this program will depend on a variety of factors, including market conditions and corporate and regulatory considerations. From January 1 through February 24, 2026, the Company repurchased approximately 4.3 million common shares for an aggregate purchase price of $405 million. At February 24, 2026, approximately $702 million of repurchases were available under the Company’s share repurchase program. Repurchases of Arch Capital’s common shares in connection with the share repurchase plan and other share-based transactions were held in the treasury under the cost method, and the cost of the common shares acquired is included in ‘Common shares held in treasury, at cost.’ At December 31, 2025, Arch Capital held 240.8 million shares for an aggregate cost of $6.4 billion in treasury, at cost. The Company’s repurchases under the share repurchase program were as follows:
| Year Ended December 31,
| 2025 |  | 2024 |  | 2023
Aggregate cost of shares repurchased | $ | 1,889.8 |  |  | $ | 23.5 |  |  | $ | — |
Shares repurchased | 21.2 |  |  | 0.3 |  |  | — |
Average price per share repurchased | $ | 89.26 |  |  | $ | 89.63 |  |  | $ | — |
Since the inception of the share repurchase program through December 31, 2025, Arch Capital has repurchased approximately 455.0 million common shares for an aggregate purchase price of $7.8 billion. Series G Preferred Shares In June 2021, Arch Capital completed a $500 million underwritten public offering of 20.0 million depositary shares (the “Depositary Shares”), each of which represents a 1/1,000th interest in a share of its 4.55% Non-Cumulative Preferred Shares, Series G, $0.01 par value and $25,000 liquidation preference per share (equivalent to $25 liquidation preference per Depositary Share) (the “Series G Preferred Shares”). Each Depositary Share, evidenced by a depositary receipt, entitles the holder, through the depositary, to a proportional fractional interest in all rights and preferences of the Series G Preferred Shares represented thereby (including any dividend, liquidation, redemption and voting rights). Holders of Series G Preferred Shares will be entitled to receive dividend payments only when, as and if declared by the Board or a duly authorized committee of the Board. Any such dividends will be payable from, and including, the date of original issue on a noncumulative basis, quarterly in arrears on the last day of March, June, September and December of each year, at an annual rate of 4.55%. Dividends on the Series G Preferred Shares are not cumulative. The Company will be restricted from paying dividends on or repurchasing its common shares unless certain dividend payments are made on the Series G Preferred Shares. The Company may not declare or pay a dividend on the Series G Preferred Shares under certain circumstances, including if the Company is or, after giving effect to such payment, would be in breach of applicable individual or group solvency and liquidity requirements or applicable individual or group enhanced capital requirements (“ECR”). The Series G Preferred Shares may not be redeemed at any time if the ECR would be breached immediately before or after giving effect to such redemption, unless the Company replaces the capital represented by preference shares to be redeemed with capital having equal or better capital treatment. Except in specified circumstances relating to certain tax or corporate events, the Series G Preferred Shares are not redeemable prior to June 11, 2026. On and after that date, the Series G Preferred Shares will be redeemable at the Company’s option, in whole or in part, at a redemption price of $25,000 per share of the Series G Preferred Shares (equivalent to $25 per depositary share), plus any declared and unpaid dividends, without accumulation of any undeclared dividends to, but excluding, the redemption date. The Depositary Shares will be redeemed if and to the extent the related Series G Preferred Shares are redeemed by the Company. Neither the Depositary Shares nor the Series G Preferred Shares have a stated maturity, nor will they be subject to any sinking fund or mandatory redemption. The Series G Preferred Shares are not convertible into any other securities. The Series G Preferred Shares do not have voting rights, except under limited circumstances. Series F Preferred Shares In August 2017 and November 2017, Arch Capital completed combined $330 million of underwritten public offerings ($230 million in August 2017 and $100 million in November 2017) of 13.2 million depositary shares (the “Series F Depositary Shares”), each of which represents a 1/1,000th interest in a share of its 5.45% Non-Cumulative Preferred Shares, Series F, with a $0.01 par value and $25,000 liquidation preference per share (equivalent to $25 liquidation preference per Series F Depositary Share) (the “Series F Preferred Shares”). Each Series F Depositary Share, evidenced by a depositary receipt, entitles the holder, through the depositary, to a proportional fractional interest in all rights and preferences of the Series F Preferred Shares represented thereby (including any dividend, liquidation, redemption and voting rights). Holders of Series F Preferred Shares will be entitled to receive dividend payments only when, as and if declared by the Board or a duly authorized committee of the board. Any such dividends will be payable from, and including, the date of original issue on a noncumulative basis, quarterly in arrears on the last day of March, June, September and December of each year, at an annual rate of 5.45%. Dividends on the Series F Preferred Shares are not cumulative. The Company will be restricted from paying dividends on or repurchasing its common shares unless certain dividend payments are made on the Series F Preferred Shares. Except in specified circumstances relating to certain tax or corporate events, the Series F Preferred Shares are not redeemable prior to August 17, 2022 (the fifth anniversary of the issue date). On and after that date, the Series F Preferred Shares will be redeemable at the Company’s option, in whole or in part, at a redemption price of $25,000 per share of the Series F Preferred Shares (equivalent to $25 per depositary share), plus any declared and unpaid dividends, without accumulation of any undeclared dividends to, but excluding, the redemption date. The Series F Depositary Shares will be redeemed if and to the extent the related Series F Preferred Shares are redeemed by the Company. Neither the Series F Depositary Shares nor the Series F Preferred Shares have a stated maturity, nor will they be subject to any sinking fund or mandatory redemption. The Series F Preferred Shares are not convertible into any other securities. The Series F Preferred Shares will not have voting rights, except under limited circumstances.

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