Omit full stops in these singular and plural abbreviations?

Is it common in BrE to remove the full stops in the abbreviations below? Are they correctly written as is—especially the possessive forms without the full stops? Which, if any, would you use full stops?

The Microsoft Corp's newest software is amazing.

Trio Ltd's company chairman resigned.

The Gasky Corp enjoyed substantial profits.

Bob Anderson Sr will be present.

Bob Anderson Sr's reputation was compromised.

Frank Davison Jr's mom passed away.

Frank Davidson Jr is one hell of a guy.

Regeneron Co's profits dwindled.

Working for the Regeneron Co is aggravating.

Michael P Smith ran for town board.

E E Cummings was amazing.

We will go to Fifth Ave later.

It happened at 495 Northern Blvd last night.

When we arrive at Maple St, tell your mom she can go home.

It happened on the corner of 10th and 11th Aves yesterday.

It happened by Maple and Frankfort Sts last Saturday.

Drs Pete Landrey and Elouise Cummings will be there.

Thanks.