Glaxo Wellcome, formerly known as Glaxo Holdings, is familiar with how costly patent battles can be.

Glaxo Holdings plans to file next month for a nonprescription version of its ulcer treatment, Zantac, the world's best-selling drug.

Last March, Ernest Mario resigned unexpectedly as chief executive of Glaxo Holdings.

Glaxo Holdings is expected to report its first-half results for the 1994 fiscal year today.

They said the next announcement might involve Glaxo Holdings, also a giant British-based pharmaceutical company.

There had been speculation that Glaxo Holdings, a big British drug maker, was interested.

It is made by Britain's Glaxo Holdings.

Glaxo Holdings, up 2, to 51 1/4, was one of the biggest winners on the Big Board.

Tom Cameron, the fund's manager, likes Glaxo Holdings, based in London, the world's third-largest drug company.

Glaxo Holdings' chief executive resigned unexpectedly, citing differences with the chairman over management.