This Haaretz article is about Judge Benny Sagi and the submarine and naval vessel case mentioned. You can read it through archive today.
Fatal Motorcycle Accident Leaves Israel's Most Serious Security Corruption Case in Limbo
Judge Benny Sagi was set to deliver the verdict regarding a suspect in the submarine and naval vessels affair, which concerns two deals with a German conglomerate for the acquisition of submarines and missile boats to defend the natural gas fields off Israel's coast
https://www.haaretz.com/israel-news/2026-01-07/ty-article/.premium/israeli-courts-in-limbo-after-judges-death-leaves-submarine-corruption-verdict-pending/0000019b-9910-dd39-a7ff-fb3a36c50000
One paragraph says,
The main allegation against the prime minister was that he pushed to buy additional submarines for the navy despite defense officials' objections. Netanyahu, former Mossad chief Yossi Cohen and former Defense Minister Moshe Ya'alon were not questioned under caution in "Case 3000," which investigated the affair.
So Netanyahu was involved in a way, but not actually a defendant in this particular case that Judge Benny Sagi was presiding over.