The phrase "are grouped under" is correct and can be used in written English.
You can use it to refer to items that are organized together under a shared category. For example: "The different varieties of birds are grouped under the family of avians."
All are grouped under the parent TPM Media.
Instead, all four are grouped under the catch-all "nonhydro renewables".
Oswald, Tokyo Rose and the stripper Blaze Starr are grouped under the heading "mothers"; Norman Mailer, Cerf and Ratoucheff are "fathers".
The ports of Grangemouth, Dundee, and Leith, among others, are grouped under Forth Ports Limited, whereas Aberdeen is independent.
Several mineral properties that depend on the cohesive force between atoms (and ions) in mineral structures are grouped under tenacity.
Stocks, futures products, banking, insurance and over-the-counter products (private transactions between parties) are grouped under a single regulator, the FSA.
Living in farm settlements of 10 20 nuclear families, they are grouped under a headman and have a separate religious group in charge of worship.
Something of the same story holds for other traditional college majors, including many fields that are grouped under the heading of STEM, or science, technology, engineering and math.
Most of these innovations are grouped under the rubric "Life," which also features edifying graphs and charts on things from household energy use to tooth brushing.
You have to remember that it is a different format and you get a change, but all teams are grouped under the same English cricket umbrella, and we can't be naive enough to think that it's not," he admitted.
The surviving works are grouped under two headings.
