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HII Completes Initial Sea Trials of Virginia-Class Submarine Massachusetts (SSN 798)

1. HII completed initial sea trials for Virginia-class submarine Massachusetts. 2. Testing included first-time submersion and high-speed maneuvers. 3. Massachusetts is the 25th Virginia-class submarine and 12th from HII. 4. Continued testing and delivery support U.S. Navy capabilities. 5. HII reaffirms commitment to national security through advanced shipbuilding.

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Why Bullish?

Successful trials enhance HII's reputation in defense contracting, likely boosting investor confidence. Historically, successful military deliveries correlate with stock price increases.

How important is it?

Successful sea trials reaffirm HII's capabilities and may lead to new contracts, directly influencing stock performance.

Why Short Term?

Immediate market reaction expected as successful trials could influence quarterly financials and contract renewals shortly.

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NAVGDRTN
NEWPORT NEWS, Va., Oct. 07, 2025 (GLOBE NEWSWIRE) -- HII (NYSE: HII) announced today that its Newport News Shipbuilding division has successfully completed initial sea trials for Virginia-class attack submarine Massachusetts (SSN 798). Over the course of several days at sea, the NNS and Navy team conducted testing of systems and components, including submerging the submarine for the first time and high-speed maneuvers while on the surface and submerged. The testing program will continue at NNS ahead of delivering the boat to the U.S. Navy. “Our entire team at Newport News Shipbuilding understands the importance of delivering capability to our fleet,” NNS President Kari Wilkinson said. “Proving capabilities through this first sea trial for Massachusetts is an important step in demonstrating this and we are honored to support the mission.” The boat, the 25th Virginia-class submarine, was christened in May 2023; Massachusetts will be the 12th delivered by NNS. Photos accompanying this release are available at: http://hii.com/news/hii-completes-initial-sea-trials-of-virginia-class-submarine-massachusetts-ssn-798/. About HII HII is a global, all-domain defense provider. HII’s mission is to deliver the world’s most powerful ships and all-domain solutions in service of the nation, creating the advantage for our customers to protect peace and freedom around the world. As the nation’s largest military shipbuilder, and with a more than 135-year history of advancing U.S. national security, HII delivers critical capabilities extending from ships to unmanned systems, cyber, ISR, AI/ML and synthetic training. Headquartered in Virginia, HII’s workforce is 44,000 strong. For more information, visit: HII on the web: https://www.HII.com/HII on Facebook: https://www.facebook.com/TeamHIIHII on X: https://www.twitter.com/WeAreHIIHII on Instagram: https://www.instagram.com/WeAreHII Contact: Todd CorilloTodd.T.Corillo@hii-co.com(757) 688-3220 A photo accompanying this announcement is available at https://www.globenewswire.com/NewsRoom/AttachmentNg/52655e9b-b8c9-473a-a435-394623cf1b38

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