Exhibit 99.1

		Chubb Limited Bärengasse 32 CH-8001 Zurich Switzerland		www.chubb.com @Chubb

News Release

Chubb Reports Third Quarter Per Share Net Loss and Operating Loss of $(0.15) and $(0.13), Respectively, Including Catastrophe Losses of $3.27 Per Share, in Line with Midpoint of Preannounced Estimates; Book and Tangible Book Value per Share Essentially Unchanged

Chubb Limited News Release

ZURICH – October 26, 2017 – Chubb Limited (NYSE: CB) today reported a net loss for the quarter ended September 30, 2017 of $(70) million, or $(0.15) per share, compared with net income of $1,360 million, or $2.88 per share, for the same quarter last year. Operating loss was $(60) million, or $(0.13) per share, compared with operating income of $1,356 million, or $2.88 per share, for the same quarter last year. The property and casualty (P&C) combined ratio was 110.8% for the quarter driven by significant catastrophe losses. Book value per share increased 0.5% and tangible book value per share decreased (0.3)% from June 30, 2017 and now stand at $108.74 and $65.06, respectively. Book value and tangible book value were favorably impacted by net realized and unrealized gains of $162 million after-tax in the company’s investment portfolio. Additionally, foreign currency movement favorably impacted book value by $675 million after-tax and tangible book value by $337 million after-tax.

Chubb Limited

Third Quarter Summary

(in millions, except per share amounts)

(Unaudited)

For the three months ended September 30, 2017 and 2016, the tax expenses (benefits) related to the table above were $(14) million and $(30) million, respectively, for Chubb one-time integration and merger-related expenses; $(18) million and $(26) million, respectively, for amortization of fair value adjustment of acquired invested assets and long-term debt; $8 million and $27 million, respectively, for adjusted net realized gains and losses; and $(61) million and $306 million, respectively, for operating income.

For the nine months ended September 30, 2017, net income was $2,328 million, or $4.94 per share, compared with $2,525 million, or $5.44 per share, for 2016. Operating income was $2,295 million, or $4.87 per share, compared with $3,433 million, or $7.40 per share, for 2016. The P&C combined ratio for the nine months ended September 30, 2017 was 96.0%. Book value per share increased 5.0% and tangible book value per share increased 7.3% from December 31, 2016. Book value and tangible book value were favorably impacted by net realized and unrealized gains of $835 million after-tax in the company’s investment portfolio and $96 million of after-tax realized gains in the company’s variable annuity reinsurance business. Additionally, foreign currency movement favorably impacted book value by $902 million after-tax and tangible book value by $459 million after-tax. Annualized ROE and operating ROE were 6.3% and 6.4%, respectively, for the year.

Chubb Limited News Release

Chubb Limited

Nine Months Ended Summary

(in millions, except per share amounts)

(Unaudited)

For the nine months ended September 30, 2017 and 2016, the tax expenses (benefits) related to the table above were $(73) million and $(106) million, respectively, for Chubb one-time integration and merger-related expenses; $(62) million and $(79) million, respectively, for amortization of fair value adjustment of acquired invested assets and long-term debt; $25 million and $22 million, respectively, for adjusted net realized gains and losses; and $353 million and $719 million, respectively, for operating income.    

Evan G. Greenberg, Chairman and Chief Executive Officer of Chubb Limited, commented: “While it was a tough quarter for CATs, it’s the business we’re in. We experienced a series of significant natural catastrophes, including three hurricanes and two earthquakes, which will likely produce the third $100 billion-plus year for insured catastrophe losses globally for the industry in the last 12 years. We ran a 111% combined ratio and produced a loss of 13 cents per share, or essentially a quarter of our annual earnings, which is within our tolerance for risk and the amount of loss we would expect for these events. I’m proud of our claims and loss prevention organization’s response serving our customers in their time of need. They continue to distinguish our company. The Chubb brand is all about service – we truly aim to serve our customers and go beyond their expectations.

“Our underlying operating results demonstrate the strength and vitality of the company. P&C net premiums written grew about 4.5% in the quarter. Excluding the catastrophe losses, both operating earnings and underwriting results were simply excellent. Our two sources of income were both records in the quarter – net investment income, up 7.5%, and P&C current accident year underwriting income excluding catastrophe losses, up about 5.5%, with a current accident year combined ratio excluding catastrophes of 88.5%. We also had record operating cash flow of $1.8 billion.

“I believe we are at the beginning of a firming price environment, driven by years of soft pricing that has resulted in inadequate rates in many classes. The magnitude of this year’s CAT losses, which on a worldwide aggregate basis was between a one-in-five and one-in-10 year industry event, simply adds to the pressure to return to pricing that produces an adequate risk-adjusted return. In that regard, we intend as usual to demonstrate leadership.

“Our company is in great shape from the perspectives of risk management, growth opportunity and financial efficiency. We are investing aggressively in our future while delivering results to shareholders today, and we are optimistic about the future.”

Chubb Limited News Release

Operating highlights for the quarter ended September 30, 2017 were as follows:

Chubb Limited News Release

Chubb Limited News Release

Details of financial results by business segment are available in the Chubb Limited Financial Supplement. Key segment items for the quarter ended September 30, 2017 are presented below:

Chubb Limited News Release

Please refer to the Chubb Limited Financial Supplement, dated September 30, 2017, which is posted on the company’s investor relations website, investors.chubb.com, in the Financials section for more detailed information on individual segment performance, together with additional disclosure on reinsurance recoverable, loss reserves, investment portfolio, and debt and capital.

Chubb Limited will hold its third quarter earnings conference call on Friday, October 27, 2017, beginning at 8:30 a.m. Eastern. The earnings conference call will be available via live webcast at investors.chubb.com or by dialing 888-395-3241 (within the United States) or 719-325-2402 (international), passcode 7430195. Please refer to the Chubb investor relations website under Events and Presentations for details. A replay of the call will be available until Friday, November 10, 2017, and the archived webcast will be available for approximately one month. To listen to the replay, please click here to register and receive dial-in numbers.

About Chubb

Chubb is the world’s largest publicly traded property and casualty insurance company. With operations in 54 countries, Chubb provides commercial and personal property and casualty insurance, personal accident and supplemental health insurance, reinsurance and life insurance to a diverse group of clients. As an underwriting company, we assess, assume and manage risk with insight and discipline. We service and pay our claims fairly and promptly. The company is also defined by its extensive product and service offerings, broad distribution capabilities, exceptional financial strength and local operations globally. Parent company Chubb Limited is listed on the New York Stock Exchange (NYSE: CB) and is a component of the S&P 500 index. Chubb maintains executive offices in Zurich, New York, London and other locations, and employs approximately 31,000 people worldwide. Additional information can be found at: www.chubb.com.

Investor Contact

Helen Wilson: (441) 299-9283; helen.wilson@chubb.com

Media Contact

Jeffrey Zack: (212) 827-4444; jeffrey.zack@chubb.com

All comparisons are with the same period last year unless otherwise specifically stated.

Chubb Limited News Release

Regulation G - Non-GAAP Financial Measures

In presenting our results, we included and discussed certain non-GAAP measures. These non-GAAP measures, which may be defined differently by other companies, are important for an understanding of our overall results of operations and financial condition. However, they should not be viewed as a substitute for measures determined in accordance with generally accepted accounting principles (GAAP).

Throughout this document there are various measures presented on a constant-dollar basis (i.e., excludes the impact of foreign exchange). We believe it is useful to evaluate the trends in our results exclusive of the effect of fluctuations in exchange rates between the U.S. dollar and the currencies in which our international business is transacted, as these exchange rates could fluctuate significantly between periods and distort the analysis of trends. The impact is determined by assuming constant foreign exchange rates between periods by translating prior period results using the same local currency exchange rates as the comparable current period.

Adjusted net investment income is net investment income excluding the amortization of the fair value adjustment on acquired invested assets. We believe this measure is meaningful as it highlights the underlying performance of our invested assets and portfolio management in support of our lines of business.

Adjusted net realized gains (losses), net of tax includes net realized gains (losses) and net realized gains (losses) recorded in other income (expense) related to unconsolidated subsidiaries, and excludes realized gains and losses on crop derivatives. These derivatives were purchased to provide economic benefit, in a manner similar to reinsurance protection, in the event that a significant decline in commodity pricing impacts underwriting results. We view gains and losses on these derivatives as part of the results of our underwriting operations, and therefore realized gains (losses) from these derivatives are reclassified to adjusted losses and loss expenses. The P&C combined ratio includes adjusted losses and loss expenses in the ratio numerator.

Underwriting income, P&C underwriting income and Global P&C underwriting income are calculated by subtracting losses and loss expenses, policy benefits, policy acquisition costs and administrative expenses from net premiums earned. P&C underwriting income also includes gains (losses) on crop derivatives. We use underwriting income and operating ratios to monitor the results of our operations without the impact of certain factors, including net investment income, other income (expense), interest and income tax expense and adjusted net realized gains (losses). Current accident year underwriting income excluding catastrophe losses is underwriting income adjusted to exclude catastrophe losses and prior period development (PPD). We believe it is useful to exclude catastrophe losses, as they are not predictable as to timing and amount, and PPD as these unexpected loss developments on historical reserves are not indicative of our current underwriting performance. We believe the use of these measures enhances the understanding of our results of operations by highlighting the underlying profitability of our insurance business.

Segment income (loss) includes underwriting income, adjusted net investment income, other income (expense) – operating, and amortization expense of purchased intangibles.

Operating income, net of tax, excludes adjusted realized gains and losses, Chubb integration and related expenses, and the amortization of the fair value adjustments of acquired debt and invested assets related to the Chubb Corp acquisition. We believe this presentation enhances the understanding of our results of operations by highlighting the underlying profitability of our insurance business. We exclude adjusted net realized gains (losses) because the amount of these gains (losses) is heavily influenced by the availability of market opportunities. We also exclude Chubb integration and related expenses related to the acquisition due to the size, complexity, and volume of this acquisition, which may not be

Chubb Limited News Release

indicative of such future costs. We believe that excluding the Chubb integration and related expenses facilitates the comparison of our financial results to our historical operating results.

Operating income excluding catastrophe losses excludes the impact of catastrophe losses due to the significant size and number of these events in the third quarter of 2017 which could obscure the underlying operating results. We believe this measure provides a better evaluation of our operating performance and enhances the understanding of the trends in our property and casualty business. Operating income and Operating income excluding catastrophe losses should not be viewed as a substitute for net income determined in accordance with GAAP. References to operating income mean net of tax, whether or not noted.

P&C combined ratio is the sum of the loss and loss expense ratio, acquisition cost ratio and the administrative expense ratio excluding the life business and including the realized gains and loss on the crop derivatives.

Current accident year P&C combined ratio excluding catastrophe losses excludes the impact of catastrophe losses and PPD. We believe this measure provides a better evaluation of our underwriting performance and enhances the understanding of the trends in our property and casualty business that may be obscured by these items.

Global P&C performance metrics comprise consolidated operating results (including corporate) and exclude the operating results of the company’s Life Insurance and North America Agricultural Insurance segments. We believe that these measures are useful and meaningful to investors as they are used by management to assess the company’s global P&C operations which are the most economically similar. We exclude the North America Agricultural Insurance and Life Insurance segments because the results of these businesses do not always correlate with the results of our global P&C operations.

International life net premiums written and deposits collected includes deposits collected on universal life and investment contracts (life deposits). Life deposits are not reflected as revenues in our consolidated statements of operations in accordance with GAAP. However, we include life deposits in presenting growth in our life insurance business because new life deposits are an important component of production and key to our efforts to grow our business.

Operating return on equity (ROE) or ROE calculated using operating income are annualized financial measures. The ROE numerator includes income adjusted to exclude after-tax adjusted net realized gains (losses), Chubb integration and related expenses, and the amortization of the fair value adjustment of acquired invested assets and long-term debt. The ROE denominator includes the average shareholders’ equity for the period adjusted to exclude unrealized gains (losses) on investments, net of tax. In addition, for 2016, the denominator was adjusted to account for the weighted-average impact of the $15,527 million issuance of common shares and equity awards related to the Chubb Corp acquisition on January 14, 2016. Operating ROE is a useful measure as it enhances the understanding of the return on shareholders’ equity by highlighting the underlying profitability relative to shareholders’ equity excluding the effect of unrealized gains and losses on our investments.

Net premiums written excluding merger-related underwriting actions and one-time unearned premium reserve (UPR) transfer in 2016 is a non-GAAP performance measure. Since the acquisition of the Chubb Corp, we have entered into new reinsurance agreements with third-party reinsurers for the Chubb Corp businesses and have taken other merger-related underwriting actions, including exiting certain types of business that do not meet our underwriting standards or adhere to our risk diversification strategy. We also excluded the net premiums written related to a one-time UPR transfer in 2016

Chubb Limited News Release

that reduced premiums in the prior year. We believe that this measure is meaningful to evaluate trends in our underlying business on a comparable basis.

Tangible book value per common share is shareholders’ equity less goodwill and other intangible assets divided by the shares outstanding. The intangibles related to the Chubb Corp acquisition are excluded from the tangible book value per share calculation net of tax. We believe that goodwill and other intangible assets are not indicative of our underlying insurance results or trends and make book value comparisons to less acquisitive peer companies less meaningful. In addition, we disclose per share measures for book value and tangible book value that exclude the impact of foreign currency fluctuations in order to adjust for the distortive effects of fluctuations in exchange rates.

Other income (expense) – operating excludes from consolidated Other income (expense) the portion of net realized gains and losses related to unconsolidated entities and gains and losses from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP. Net realized gains (losses) related to unconsolidated entities is excluded from operating income in order to enhance the understanding of our results of underwriting operations as they are heavily influenced by, and fluctuate in part according to, market conditions.

Chubb integration and related expenses include all internal and external costs directly related to the integration activities of the Chubb Corp acquisition, consisting primarily of personnel-related expenses, including severance and employee retention and relocation; consulting fees; and advisor fees. Chubb integration and related expenses also include interest expense related to the $5.3 billion senior notes issued in November 2015 in order to finance a portion of the Chubb Corp acquisition. We exclude this pre-acquisition interest expense from operating income because the operations for which the debt was issued were not part of our operating activities prior to the completion of the acquisition. Effective with the close of the Chubb Corp acquisition (January 14, 2016), the interest on this debt was considered a cost of our operations and is included within operating income.

See reconciliation of Non-GAAP Financial Measures on pages 32-37 in the Financial Supplement. These measures should not be viewed as a substitute for measures determined in accordance with GAAP, including premium, net income, return on equity, net investment income, and effective tax rate.

NM - not meaningful comparison

Chubb Limited News Release

Cautionary Statement Regarding Forward-Looking Statements:

Forward-looking statements made in this press release, such as those related to company performance, pricing, and our expectations and intentions and other statements that are not historical facts reflect our current views with respect to future events and financial performance and are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Such statements involve risks and uncertainties that could cause actual results to differ materially, including without limitation, the following: competition, pricing and policy term trends, the levels of new and renewal business achieved, the frequency of unpredictable catastrophic events, actual loss experience, uncertainties in the reserving or settlement process, integration activities and performance of acquired companies, loss of key employees or disruptions to our operations, new theories of liability, judicial, legislative, regulatory and other governmental developments, litigation tactics and developments, investigation developments and actual settlement terms, the amount and timing of reinsurance recoverable, credit developments among reinsurers, rating agency action, possible terrorism or the outbreak and effects of war, economic, political, regulatory, insurance and reinsurance business conditions, potential strategic opportunities including acquisitions and our ability to achieve and integrate them, as well as management’s response to these factors, and other factors identified in our filings with the Securities and Exchange Commission (SEC).

Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the dates on which they are made. We undertake no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

Chubb Limited News Release

Chubb Limited

Summary Consolidated Balance Sheets

(in millions of U.S. dollars, except per share data)

(Unaudited)

Chubb Limited News Release

Chubb Limited

Summary Consolidated Financial Data

(in millions of U.S. dollars, except share, per share data, and ratios)

(Unaudited)

Chubb Limited News Release

Chubb Limited

Consolidated Supplemental Segment Information

(in millions of U.S. dollars)

(Unaudited)