SiriusPoint appoints Rachel Winoski as Chief Human Resources Officer. HAMILTON, Bermuda, Sept. 15, 2026 (GLOBE NEWSWIRE) - SiriusPoint Ltd. ("SiriusPoint" or the "Company") (NYSE: SPNT), a global specialty underwriter, today announced the appointment of Rachel Winoski as Chief Human Resources Officer, effective October 5, 2026. Ms. Winoski will be based in New York and will join the Executive Leadership Team, reporting to Chief Executive Officer, Scott Egan. She joins SiriusPoint from AXA XL, where she served as Chief HR Officer for the Americas. Ms. Winoski brings more than 15 years of HR leadership experience within the insurance industry. Throughout her career, she has led large-scale organizational transformation, supporting acquisitions and integrations, and building high-performing global HR functions. She has also driven initiatives spanning talent, culture, employee relations, reward, talent acquisition, HR operations, and belonging and inclusion. "Rachel is an outstanding addition to SiriusPoint. She brings deep HR leadership experience, and a strong track record of building high-performing teams and cultures," said Scott Egan, Chief Executive Officer at SiriusPoint. "Rachel joins us at an exciting point in our journey. We have worked hard to create a business with a strong culture, clear values, and a relentless focus on performance. Her leadership will help us continue to strengthen our culture, invest in our people, and ensure SiriusPoint remains a place where our colleagues can grow, contribute, and do their best work." Ms. Winoski succeeds Sarah Smith, who has served as Interim Chief Human Resources Officer since April 2026. "I would like to thank Sarah Smith for her leadership of the HR team and her contribution to the Executive Leadership Team over the past six months," continued Mr. Egan. "I look forward to working closely with Sarah as she continues in her role as HR Director, partnering with our UK and European operations." About SiriusPoint SiriusPoint is a global underwriter of insurance and reinsurance providing solutions to clients and brokers around the world. Bermuda-headquartered with offices in New York, London, Stockholm and other locations, we are listed on the New York Stock Exchange (SPNT). We have licenses to write Property & Casualty and Accident & Health insurance and reinsurance globally. Our offering and distribution capabilities are strengthened by a portfolio of strategic partnerships with Managing General Agents and Program Administrators. With over $3.0 billion total capital, SiriusPoint's operating companies have a financial strength rating of A from AM Best, Fitch and S&P, and A3 from Moody's. For more information, please visit https://www.siriuspt.com/ Forward-Looking Statements We make statements in this press release, and any related oral statements, that are forward-looking statements within the meaning of the U.S. federal securities laws, which we intend to be covered by the safe harbor provisions for such forward-looking statements. These statements involve risks and uncertainties that could cause actual results to differ materially from those made in or suggested by the forward-looking statements. These risks and uncertainties include, but are not limited to, the risk factors described in SiriusPoint's most recent Annual Report on Form 10-K and any other subsequent periodic reports filed with the U.S. Securities and Exchange Commission. All forward-looking statements speak only as of the date made and SiriusPoint undertakes no obligation to update or revise publicly any forward-looking statements, whether as a result of new information, future events, or otherwise

Insurance moves: Carbon Underwriting, Liberty Mutual, Mosaic and 5Star Life. Carbon Underwriting has hired its first dedicated US casualty head with fresh growth capital behind the role, and Mosaic has expanded its finpro team with two new integrated products for digital asset and asset management clients. Several insurance organizations announced leadership changes and appointments this week, spanning specialty underwriting, corporate board governance and reinsurance. Carbon Underwriting hires a head of US casualty as it scales. Carbon Underwriting has named Phil Wooldridge (pictured, left) head of US casualty and deputy active underwriter, effective September 28. Wooldridge joins from Gallagher Re, where he was head of reinsurance for program solutions, with prior roles as head of London US casualty at SiriusPoint and syndicate chief underwriting officer for reinsurance at MS Amlin. The appointment follows a period of rapid growth for Carbon, whose revenues climbed from £150 million to £471 million between 2023 and 2026, alongside a recent growth equity investment from FTV Capital earmarked to support US expansion and the development of Carbon's Graphene data and analytics platform. For wholesale and London market brokers with existing Carbon relationships, a dedicated US casualty leader backed by fresh growth capital signals the syndicate intends to expand capacity for long-tail US casualty risk specifically, worth flagging to any client with placement difficulty in that segment. Wooldridge's reinsurance background at Gallagher Re and SiriusPoint also suggests Carbon may be positioning to support larger or more complex casualty programs than its current book reflects, a detail brokers with growing casualty accounts may want to raise directly with the syndicate. Liberty Mutual adds a private equity co-CEO to its board. Liberty Mutual has elected Scott Sperling (pictured, right), co-chief executive officer of Thomas H. Lee Partners, to its board of directors. Sperling has been with the Boston-based private equity firm since 1994 and has helped grow it to more than $50 billion in equity capital across more than 175 portfolio companies. He previously spent more than a decade managing Harvard University's endowment alternative asset classes and has served on the board of Thermo Fisher Scientific since 2006. A board-level governance appointment focused on capital allocation has no direct bearing on underwriting appetite or broker relationships in the near term. Brokers placing business with Liberty Mutual shouldn't expect any near-term change in service or pricing as a result of this addition. Mosaic Insurance continues building out its North American finpro team. Mosaic Insurance has hired Risa Kleiner as SVP, financial institutions, and Daniel Frusciano as SVP, professional liability, expanding its US finpro team to a dozen specialists supporting a global team of 24 across London, Toronto and Bermuda. Kleiner brings 20 years of underwriting, claims and legal experience, including leading the financial institutions business at Everest, while Frusciano spent more than two decades at Ambridge and Liberty Mutual/Ironshore leading financial lines and cyber underwriting teams. The expansion continues a pattern of rapid product diversification at the five-year-old carrier, which Insurance Business has previously reported launched an excess casualty unit in January, becoming its eighth product class at the time. Brokers placing financial institutions and professional liability business now have two new primary forms to consider, the integrated asset manager policy and Innovator One, both structured to consolidate coverage lines that clients would otherwise have to place separately across multiple markets. For brokers working with fintech, digital asset or asset management clients specifically, Mosaic's expanded New York-based team gives a growing, dedicated underwriting contact point worth testing on submissions that have historically required cobbling together D&O, E&O, crime and cyber coverage from different carriers. 5Star Life adds two industry veterans to its board. 5Star Life Insurance has appointed Timothy Arnold and Kimberley Wooding to its board of directors, effective September 1. Arnold spent more than 40 years in insurance, most recently as executive vice president of voluntary benefits for Unum Group and president of Colonial Life. Wooding retired from 5Star Life itself after nearly three decades with the company, most recently as executive vice president and chief financial officer. 5Star Life distributes primarily through AFBA's membership base of military and government-affiliated clients rather than a traditional independent broker channel, so this board addition has limited direct relevance for most commercial or personal lines brokers. Advisors serving military and veteran clients specifically may find Arnold's voluntary benefits background at Colonial Life a useful signal of where 5Star Life's product strategy could evolve.