Jan 7 (Reuters) - The following are the top stories in the Wall Street Journal. Reuters has not verified these stories and does not vouch for their accuracy.

- U.S. Steel X.N and Nippon Steel 5401.T have filed lawsuits accusing President Biden, the steelworkers union president, and a rival CEO of conspiring to block their $14.1 billion merger, following Biden's rejection of the deal over national security concerns.

- U.S. oil refiner Phillips 66 PSX.N said on Monday it will acquire various pipelines and distribution systems from Ares-backed pipeline operator EPIC NGL in an all-cash deal for $2.2 billion.

- Medical-device maker Stryker has agreed to acquire medical technology company Inari Medical NARI.O in a $4.9 billion deal, offering $80 per share for all outstanding common stock.

- Ulta Beauty ULTA.O has named Kecia Steelman as its new CEO, succeeding David Kimbell, who will retire after 11 years with the company, as the company seeks to revive sales amid a global beauty market slowdown.

- Wireless network company Ligado Networks filed for bankruptcy, with a plan to cut more than $7 billion in debt after U.S. government agencies blocked its planned expansion into land-based 5G wireless services.

- Michael Barr, the Federal Reserve's top regulatory cop, said he will step down by February, in a surprise move that will avert a potentially messy legal fight with President-elect Donald Trump who is now free to replace him with an official of his choosing.

(Compiled by Bengaluru newsroom)

((globalnewsmonitoring@thomsonreuters.com))