March 6 (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.

- On Semiconductor said on Wednesday that it proposed to

acquire sensor integrated circuits provider Allegro Microsystems

ALGM.O> for $35.10 per share in an all-cash transaction.

- U.S. President Donald Trump will exempt automakers from

tariffs on Canada and Mexico for one month as long as they

comply with existing free trade rules, the White House said on

Wednesday.

- KKR and Walmart ( WMT ) have agreed to sell Seiyu

supermarket chain for about $2.5 billion, ending foreign

ownership of one of Japan's most well-known supermarket

operators.

- Merck's ( MRK ) injected version of its blockbuster cancer

drug Keytruda could face a potential patent challenge from

biotech Halozyme Therapeutics ( HALO ).

- Starbucks CEO Brian Niccol asked the employees on Tuesday to

step it up, get back in the office and take responsibility for

improving the company's performance, in his first address to

employees since announcing widespread layoffs last month.

- Dollar Tree ( DLTR ) on Wednesday named former Tyson Foods

executive Stewart Glendinning as chief financial officer,

effective March 30.

(Compiled by Bengaluru newsroom)